/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/parallel/misc-1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 05:04:23,189 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 05:04:23,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 05:04:23,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 05:04:23,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 05:04:23,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 05:04:23,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 05:04:23,232 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 05:04:23,232 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 05:04:23,233 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 05:04:23,234 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 05:04:23,235 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 05:04:23,236 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 05:04:23,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 05:04:23,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 05:04:23,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 05:04:23,239 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 05:04:23,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 05:04:23,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 05:04:23,246 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 05:04:23,247 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 05:04:23,269 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 05:04:23,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 05:04:23,269 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 05:04:23,269 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 05:04:23,270 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 05:04:23,270 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 05:04:23,271 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 05:04:23,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 05:04:23,271 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 05:04:23,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 05:04:23,271 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 05:04:23,271 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 05:04:23,272 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 05:04:23,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 05:04:23,272 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 05:04:23,272 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 05:04:23,272 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 05:04:23,272 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 05:04:23,273 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 05:04:23,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 05:04:23,273 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 05:04:23,273 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 05:04:23,273 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 05:04:23,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:04:23,274 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 05:04:23,274 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 05:04:23,274 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 05:04:23,274 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 05:04:23,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 05:04:23,274 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 05:04:23,275 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 05:04:23,275 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 05:04:23,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 05:04:23,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 05:04:23,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 05:04:23,514 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 05:04:23,517 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 05:04:23,517 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-1.wvr.bpl [2021-06-05 05:04:23,518 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-1.wvr.bpl' [2021-06-05 05:04:23,549 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 05:04:23,550 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 05:04:23,551 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 05:04:23,551 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 05:04:23,551 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 05:04:23,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:04:23" (1/1) ... [2021-06-05 05:04:23,564 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:04:23" (1/1) ... [2021-06-05 05:04:23,569 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 05:04:23,570 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 05:04:23,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 05:04:23,571 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 05:04:23,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:04:23" (1/1) ... [2021-06-05 05:04:23,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:04:23" (1/1) ... [2021-06-05 05:04:23,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:04:23" (1/1) ... [2021-06-05 05:04:23,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:04:23" (1/1) ... [2021-06-05 05:04:23,578 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:04:23" (1/1) ... [2021-06-05 05:04:23,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:04:23" (1/1) ... [2021-06-05 05:04:23,580 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:04:23" (1/1) ... [2021-06-05 05:04:23,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 05:04:23,584 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 05:04:23,584 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 05:04:23,584 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 05:04:23,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:04:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:04:23,654 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 05:04:23,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 05:04:23,654 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 05:04:23,654 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 05:04:23,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 05:04:23,655 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 05:04:23,655 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 05:04:23,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 05:04:23,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 05:04:23,655 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 05:04:23,780 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 05:04:23,780 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 05:04:23,781 INFO L202 PluginConnector]: Adding new model misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:04:23 BoogieIcfgContainer [2021-06-05 05:04:23,781 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 05:04:23,782 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 05:04:23,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 05:04:23,784 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 05:04:23,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:04:23" (1/2) ... [2021-06-05 05:04:23,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20cbd998 and model type misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:04:23, skipping insertion in model container [2021-06-05 05:04:23,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:04:23" (2/2) ... [2021-06-05 05:04:23,786 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-1.wvr.bpl [2021-06-05 05:04:23,789 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 05:04:23,789 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 05:04:23,790 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 05:04:23,790 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 05:04:23,829 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 05:04:23,842 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 05:04:23,854 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 05:04:23,854 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 05:04:23,855 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 05:04:23,855 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 05:04:23,855 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 05:04:23,855 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 05:04:23,855 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 05:04:23,855 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 05:04:23,861 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 31 transitions, 78 flow [2021-06-05 05:04:23,895 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 106 states, 104 states have (on average 2.1634615384615383) internal successors, (225), 105 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:23,897 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 104 states have (on average 2.1634615384615383) internal successors, (225), 105 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:23,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 05:04:23,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:23,904 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:23,905 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:23,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:23,908 INFO L82 PathProgramCache]: Analyzing trace with hash -884848578, now seen corresponding path program 1 times [2021-06-05 05:04:23,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:23,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73051930] [2021-06-05 05:04:23,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:23,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:24,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:24,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73051930] [2021-06-05 05:04:24,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73051930] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:04:24,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:04:24,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 05:04:24,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828146068] [2021-06-05 05:04:24,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:04:24,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:24,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:04:24,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:04:24,139 INFO L87 Difference]: Start difference. First operand has 106 states, 104 states have (on average 2.1634615384615383) internal successors, (225), 105 states have internal predecessors, (225), 0 states have call successors, (0), 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 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:24,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:24,286 INFO L93 Difference]: Finished difference Result 299 states and 680 transitions. [2021-06-05 05:04:24,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:04:24,288 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 05:04:24,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:24,303 INFO L225 Difference]: With dead ends: 299 [2021-06-05 05:04:24,303 INFO L226 Difference]: Without dead ends: 286 [2021-06-05 05:04:24,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:04:24,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-05 05:04:24,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 116. [2021-06-05 05:04:24,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1478260869565218) internal successors, (247), 115 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:24,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 247 transitions. [2021-06-05 05:04:24,360 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 247 transitions. Word has length 13 [2021-06-05 05:04:24,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:24,360 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 247 transitions. [2021-06-05 05:04:24,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:24,361 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 247 transitions. [2021-06-05 05:04:24,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:04:24,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:24,362 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:24,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 05:04:24,362 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:24,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:24,367 INFO L82 PathProgramCache]: Analyzing trace with hash 961813113, now seen corresponding path program 1 times [2021-06-05 05:04:24,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:24,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325255522] [2021-06-05 05:04:24,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:24,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:24,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:24,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325255522] [2021-06-05 05:04:24,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325255522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:24,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500159888] [2021-06-05 05:04:24,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:24,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:24,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:04:24,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:24,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:24,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500159888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:24,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:24,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 05:04:24,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529100751] [2021-06-05 05:04:24,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:04:24,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:24,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:04:24,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:04:24,506 INFO L87 Difference]: Start difference. First operand 116 states and 247 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:24,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:24,603 INFO L93 Difference]: Finished difference Result 284 states and 599 transitions. [2021-06-05 05:04:24,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:04:24,603 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 05:04:24,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:24,604 INFO L225 Difference]: With dead ends: 284 [2021-06-05 05:04:24,604 INFO L226 Difference]: Without dead ends: 284 [2021-06-05 05:04:24,605 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:04:24,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-06-05 05:04:24,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 124. [2021-06-05 05:04:24,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.1707317073170733) internal successors, (267), 123 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:24,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 267 transitions. [2021-06-05 05:04:24,611 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 267 transitions. Word has length 17 [2021-06-05 05:04:24,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:24,611 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 267 transitions. [2021-06-05 05:04:24,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:24,612 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 267 transitions. [2021-06-05 05:04:24,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:04:24,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:24,615 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:24,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 05:04:24,830 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:24,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:24,831 INFO L82 PathProgramCache]: Analyzing trace with hash 713419811, now seen corresponding path program 1 times [2021-06-05 05:04:24,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:24,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733616081] [2021-06-05 05:04:24,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:24,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:24,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:24,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:24,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733616081] [2021-06-05 05:04:24,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733616081] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:04:24,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:04:24,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:04:24,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967282103] [2021-06-05 05:04:24,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:04:24,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:24,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:04:24,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:04:24,865 INFO L87 Difference]: Start difference. First operand 124 states and 267 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:24,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:24,913 INFO L93 Difference]: Finished difference Result 166 states and 354 transitions. [2021-06-05 05:04:24,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:04:24,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 05:04:24,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:24,915 INFO L225 Difference]: With dead ends: 166 [2021-06-05 05:04:24,919 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 05:04:24,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:04:24,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 05:04:24,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 121. [2021-06-05 05:04:24,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.158333333333333) internal successors, (259), 120 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:24,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 259 transitions. [2021-06-05 05:04:24,930 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 259 transitions. Word has length 17 [2021-06-05 05:04:24,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:24,930 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 259 transitions. [2021-06-05 05:04:24,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:24,931 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 259 transitions. [2021-06-05 05:04:24,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:04:24,931 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:24,931 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:24,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 05:04:24,932 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:24,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:24,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1233373665, now seen corresponding path program 2 times [2021-06-05 05:04:24,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:24,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038748526] [2021-06-05 05:04:24,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:24,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:24,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:24,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:24,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038748526] [2021-06-05 05:04:24,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038748526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:24,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980329445] [2021-06-05 05:04:24,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:25,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:04:25,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:25,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:04:25,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:25,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:25,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980329445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:25,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:25,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-06-05 05:04:25,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128753291] [2021-06-05 05:04:25,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:04:25,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:25,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:04:25,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:04:25,078 INFO L87 Difference]: Start difference. First operand 121 states and 259 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:25,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:25,179 INFO L93 Difference]: Finished difference Result 242 states and 545 transitions. [2021-06-05 05:04:25,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:04:25,180 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 05:04:25,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:25,181 INFO L225 Difference]: With dead ends: 242 [2021-06-05 05:04:25,181 INFO L226 Difference]: Without dead ends: 242 [2021-06-05 05:04:25,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:04:25,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-06-05 05:04:25,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 125. [2021-06-05 05:04:25,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.153225806451613) internal successors, (267), 124 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:25,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 267 transitions. [2021-06-05 05:04:25,185 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 267 transitions. Word has length 17 [2021-06-05 05:04:25,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:25,185 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 267 transitions. [2021-06-05 05:04:25,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:25,185 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 267 transitions. [2021-06-05 05:04:25,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:04:25,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:25,186 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:25,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:25,401 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:25,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:25,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1164039970, now seen corresponding path program 1 times [2021-06-05 05:04:25,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:25,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186060489] [2021-06-05 05:04:25,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:25,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:25,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:25,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:25,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186060489] [2021-06-05 05:04:25,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186060489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:25,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240845933] [2021-06-05 05:04:25,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:25,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:25,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:25,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:25,721 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 11 treesize of output 7 [2021-06-05 05:04:25,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:25,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:25,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:04:25,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:7 [2021-06-05 05:04:25,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:25,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240845933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:25,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:25,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-06-05 05:04:25,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156145993] [2021-06-05 05:04:25,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:04:25,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:25,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:04:25,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:04:25,767 INFO L87 Difference]: Start difference. First operand 125 states and 267 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:26,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:26,003 INFO L93 Difference]: Finished difference Result 441 states and 1008 transitions. [2021-06-05 05:04:26,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:04:26,003 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 21 [2021-06-05 05:04:26,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:26,005 INFO L225 Difference]: With dead ends: 441 [2021-06-05 05:04:26,005 INFO L226 Difference]: Without dead ends: 431 [2021-06-05 05:04:26,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 165.5ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:04:26,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-06-05 05:04:26,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 191. [2021-06-05 05:04:26,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.1842105263157894) internal successors, (415), 190 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:26,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 415 transitions. [2021-06-05 05:04:26,024 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 415 transitions. Word has length 21 [2021-06-05 05:04:26,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:26,024 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 415 transitions. [2021-06-05 05:04:26,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:26,025 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 415 transitions. [2021-06-05 05:04:26,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:04:26,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:26,025 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:26,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:26,237 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:26,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:26,237 INFO L82 PathProgramCache]: Analyzing trace with hash 501161696, now seen corresponding path program 2 times [2021-06-05 05:04:26,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:26,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527555776] [2021-06-05 05:04:26,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:26,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:26,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:26,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527555776] [2021-06-05 05:04:26,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527555776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:26,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189898251] [2021-06-05 05:04:26,352 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:26,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:04:26,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:26,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:26,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:26,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:04:26,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:26,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:26,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:04:26,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:10 [2021-06-05 05:04:26,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:26,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189898251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:26,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:26,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-06-05 05:04:26,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540297793] [2021-06-05 05:04:26,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:04:26,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:26,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:04:26,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:04:26,541 INFO L87 Difference]: Start difference. First operand 191 states and 415 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:26,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:26,748 INFO L93 Difference]: Finished difference Result 432 states and 992 transitions. [2021-06-05 05:04:26,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:04:26,748 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 21 [2021-06-05 05:04:26,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:26,750 INFO L225 Difference]: With dead ends: 432 [2021-06-05 05:04:26,750 INFO L226 Difference]: Without dead ends: 423 [2021-06-05 05:04:26,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 170.8ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:04:26,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-06-05 05:04:26,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 202. [2021-06-05 05:04:26,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.1940298507462686) internal successors, (441), 201 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:26,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 441 transitions. [2021-06-05 05:04:26,755 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 441 transitions. Word has length 21 [2021-06-05 05:04:26,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:26,756 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 441 transitions. [2021-06-05 05:04:26,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:26,756 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 441 transitions. [2021-06-05 05:04:26,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:04:26,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:26,757 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:26,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:26,972 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:26,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:26,973 INFO L82 PathProgramCache]: Analyzing trace with hash -2037404550, now seen corresponding path program 3 times [2021-06-05 05:04:26,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:26,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970802485] [2021-06-05 05:04:26,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:26,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:27,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:27,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:27,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970802485] [2021-06-05 05:04:27,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970802485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:27,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404232152] [2021-06-05 05:04:27,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:04:27,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:04:27,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:27,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:27,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:27,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:04:27,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:27,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:27,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:04:27,167 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:10 [2021-06-05 05:04:27,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:27,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404232152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:27,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:27,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-06-05 05:04:27,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131536401] [2021-06-05 05:04:27,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:04:27,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:27,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:04:27,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:04:27,209 INFO L87 Difference]: Start difference. First operand 202 states and 441 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:27,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:27,366 INFO L93 Difference]: Finished difference Result 440 states and 1008 transitions. [2021-06-05 05:04:27,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:04:27,366 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 05:04:27,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:27,368 INFO L225 Difference]: With dead ends: 440 [2021-06-05 05:04:27,368 INFO L226 Difference]: Without dead ends: 429 [2021-06-05 05:04:27,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:04:27,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-06-05 05:04:27,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 199. [2021-06-05 05:04:27,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.191919191919192) internal successors, (434), 198 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:27,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 434 transitions. [2021-06-05 05:04:27,373 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 434 transitions. Word has length 21 [2021-06-05 05:04:27,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:27,373 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 434 transitions. [2021-06-05 05:04:27,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:27,373 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 434 transitions. [2021-06-05 05:04:27,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:04:27,374 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:27,374 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:27,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-05 05:04:27,589 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:27,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:27,589 INFO L82 PathProgramCache]: Analyzing trace with hash 107399676, now seen corresponding path program 4 times [2021-06-05 05:04:27,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:27,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488097534] [2021-06-05 05:04:27,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:27,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:27,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:27,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:27,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488097534] [2021-06-05 05:04:27,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488097534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:27,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433743901] [2021-06-05 05:04:27,739 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:27,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:04:27,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:27,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:27,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:27,839 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 11 treesize of output 7 [2021-06-05 05:04:27,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:27,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:27,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:04:27,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:7 [2021-06-05 05:04:27,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:27,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433743901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:27,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:27,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2021-06-05 05:04:27,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200928255] [2021-06-05 05:04:27,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:04:27,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:27,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:04:27,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:04:27,873 INFO L87 Difference]: Start difference. First operand 199 states and 434 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:28,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:28,173 INFO L93 Difference]: Finished difference Result 471 states and 1075 transitions. [2021-06-05 05:04:28,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:04:28,174 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 05:04:28,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:28,175 INFO L225 Difference]: With dead ends: 471 [2021-06-05 05:04:28,175 INFO L226 Difference]: Without dead ends: 462 [2021-06-05 05:04:28,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 201.3ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:28,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-06-05 05:04:28,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 224. [2021-06-05 05:04:28,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.192825112107623) internal successors, (489), 223 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:28,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 489 transitions. [2021-06-05 05:04:28,181 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 489 transitions. Word has length 21 [2021-06-05 05:04:28,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:28,181 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 489 transitions. [2021-06-05 05:04:28,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:28,182 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 489 transitions. [2021-06-05 05:04:28,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:04:28,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:28,182 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:28,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:28,393 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:28,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:28,393 INFO L82 PathProgramCache]: Analyzing trace with hash -513087460, now seen corresponding path program 5 times [2021-06-05 05:04:28,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:28,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837493574] [2021-06-05 05:04:28,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:28,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:28,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:28,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:28,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837493574] [2021-06-05 05:04:28,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837493574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:28,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316429198] [2021-06-05 05:04:28,516 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:28,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:04:28,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:28,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:28,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:28,595 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-05 05:04:28,596 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2021-06-05 05:04:28,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:28,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:28,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:04:28,602 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:10 [2021-06-05 05:04:28,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:28,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316429198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:28,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:28,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2021-06-05 05:04:28,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221058063] [2021-06-05 05:04:28,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:04:28,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:28,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:04:28,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:04:28,645 INFO L87 Difference]: Start difference. First operand 224 states and 489 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:28,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:28,858 INFO L93 Difference]: Finished difference Result 472 states and 1084 transitions. [2021-06-05 05:04:28,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:04:28,859 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 05:04:28,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:28,860 INFO L225 Difference]: With dead ends: 472 [2021-06-05 05:04:28,860 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 05:04:28,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 177.5ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:28,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 05:04:28,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 233. [2021-06-05 05:04:28,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.206896551724138) internal successors, (512), 232 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:28,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 512 transitions. [2021-06-05 05:04:28,866 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 512 transitions. Word has length 21 [2021-06-05 05:04:28,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:28,866 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 512 transitions. [2021-06-05 05:04:28,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:28,866 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 512 transitions. [2021-06-05 05:04:28,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:04:28,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:28,866 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:29,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:29,081 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:29,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:29,081 INFO L82 PathProgramCache]: Analyzing trace with hash 152115708, now seen corresponding path program 6 times [2021-06-05 05:04:29,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:29,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980385233] [2021-06-05 05:04:29,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:29,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:29,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:29,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:29,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980385233] [2021-06-05 05:04:29,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980385233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:29,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913900547] [2021-06-05 05:04:29,208 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:29,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:04:29,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:29,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:29,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:29,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 05:04:29,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:29,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:29,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:04:29,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:10 [2021-06-05 05:04:29,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:29,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913900547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:29,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:29,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2021-06-05 05:04:29,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967193339] [2021-06-05 05:04:29,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:04:29,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:29,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:04:29,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:04:29,333 INFO L87 Difference]: Start difference. First operand 233 states and 512 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:29,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:29,578 INFO L93 Difference]: Finished difference Result 469 states and 1074 transitions. [2021-06-05 05:04:29,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:04:29,578 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 05:04:29,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:29,579 INFO L225 Difference]: With dead ends: 469 [2021-06-05 05:04:29,580 INFO L226 Difference]: Without dead ends: 458 [2021-06-05 05:04:29,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 182.7ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:29,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-05 05:04:29,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 224. [2021-06-05 05:04:29,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.192825112107623) internal successors, (489), 223 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:29,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 489 transitions. [2021-06-05 05:04:29,584 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 489 transitions. Word has length 21 [2021-06-05 05:04:29,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:29,585 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 489 transitions. [2021-06-05 05:04:29,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:29,585 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 489 transitions. [2021-06-05 05:04:29,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:04:29,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:29,585 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:29,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 05:04:29,797 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:29,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:29,797 INFO L82 PathProgramCache]: Analyzing trace with hash -696020967, now seen corresponding path program 7 times [2021-06-05 05:04:29,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:29,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229069522] [2021-06-05 05:04:29,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:29,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:29,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:29,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:29,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229069522] [2021-06-05 05:04:29,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229069522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:29,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477009827] [2021-06-05 05:04:29,818 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:04:29,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:29,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:04:29,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:29,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:29,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477009827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:29,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:29,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 05:04:29,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852877746] [2021-06-05 05:04:29,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:04:29,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:29,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:04:29,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:04:29,897 INFO L87 Difference]: Start difference. First operand 224 states and 489 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:29,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:29,989 INFO L93 Difference]: Finished difference Result 475 states and 1004 transitions. [2021-06-05 05:04:29,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:04:29,989 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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 25 [2021-06-05 05:04:29,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:29,991 INFO L225 Difference]: With dead ends: 475 [2021-06-05 05:04:29,991 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 05:04:29,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:04:29,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 05:04:29,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 295. [2021-06-05 05:04:29,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.302721088435374) internal successors, (677), 294 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:29,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 677 transitions. [2021-06-05 05:04:29,997 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 677 transitions. Word has length 25 [2021-06-05 05:04:29,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:29,997 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 677 transitions. [2021-06-05 05:04:29,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:29,997 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 677 transitions. [2021-06-05 05:04:29,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:04:29,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:29,998 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:30,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:30,215 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:30,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:30,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1371569347, now seen corresponding path program 8 times [2021-06-05 05:04:30,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:30,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461215372] [2021-06-05 05:04:30,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:30,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:30,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:30,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:30,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461215372] [2021-06-05 05:04:30,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461215372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:30,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521691320] [2021-06-05 05:04:30,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:30,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:04:30,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:30,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:04:30,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:30,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:30,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521691320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:30,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:30,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 05:04:30,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524272377] [2021-06-05 05:04:30,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:04:30,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:30,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:04:30,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:04:30,306 INFO L87 Difference]: Start difference. First operand 295 states and 677 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:30,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:30,423 INFO L93 Difference]: Finished difference Result 596 states and 1335 transitions. [2021-06-05 05:04:30,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:04:30,423 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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 25 [2021-06-05 05:04:30,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:30,425 INFO L225 Difference]: With dead ends: 596 [2021-06-05 05:04:30,425 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 05:04:30,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:04:30,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 05:04:30,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 476. [2021-06-05 05:04:30,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.351578947368421) internal successors, (1117), 475 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:30,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1117 transitions. [2021-06-05 05:04:30,433 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1117 transitions. Word has length 25 [2021-06-05 05:04:30,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:30,433 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1117 transitions. [2021-06-05 05:04:30,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:30,434 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1117 transitions. [2021-06-05 05:04:30,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:04:30,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:30,434 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:30,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:30,652 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:30,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:30,653 INFO L82 PathProgramCache]: Analyzing trace with hash -2027124135, now seen corresponding path program 9 times [2021-06-05 05:04:30,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:30,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038642887] [2021-06-05 05:04:30,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:30,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:30,679 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:30,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:30,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038642887] [2021-06-05 05:04:30,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038642887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:30,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737471703] [2021-06-05 05:04:30,680 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) [2021-06-05 05:04:30,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:04:30,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:30,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:04:30,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:30,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:30,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737471703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:30,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:30,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 05:04:30,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46484188] [2021-06-05 05:04:30,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:04:30,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:30,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:04:30,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:04:30,744 INFO L87 Difference]: Start difference. First operand 476 states and 1117 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:30,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:30,829 INFO L93 Difference]: Finished difference Result 552 states and 1237 transitions. [2021-06-05 05:04:30,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:04:30,829 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 25 [2021-06-05 05:04:30,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:30,831 INFO L225 Difference]: With dead ends: 552 [2021-06-05 05:04:30,831 INFO L226 Difference]: Without dead ends: 552 [2021-06-05 05:04:30,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:04:30,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-06-05 05:04:30,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 471. [2021-06-05 05:04:30,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.331914893617021) internal successors, (1096), 470 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:30,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1096 transitions. [2021-06-05 05:04:30,839 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1096 transitions. Word has length 25 [2021-06-05 05:04:30,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:30,839 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1096 transitions. [2021-06-05 05:04:30,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:30,839 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1096 transitions. [2021-06-05 05:04:30,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:04:30,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:30,840 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:31,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 05:04:31,040 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:31,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:31,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1525256391, now seen corresponding path program 10 times [2021-06-05 05:04:31,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:31,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739105714] [2021-06-05 05:04:31,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:31,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:31,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739105714] [2021-06-05 05:04:31,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739105714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:31,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743674419] [2021-06-05 05:04:31,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:31,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:04:31,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:31,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:04:31,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:31,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743674419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:31,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:31,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 05:04:31,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110941684] [2021-06-05 05:04:31,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:04:31,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:31,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:04:31,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:04:31,120 INFO L87 Difference]: Start difference. First operand 471 states and 1096 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:31,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:31,198 INFO L93 Difference]: Finished difference Result 568 states and 1272 transitions. [2021-06-05 05:04:31,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:04:31,199 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 25 [2021-06-05 05:04:31,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:31,200 INFO L225 Difference]: With dead ends: 568 [2021-06-05 05:04:31,200 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 05:04:31,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:04:31,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 05:04:31,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 474. [2021-06-05 05:04:31,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 2.3255813953488373) internal successors, (1100), 473 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:31,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1100 transitions. [2021-06-05 05:04:31,209 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1100 transitions. Word has length 25 [2021-06-05 05:04:31,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:31,209 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1100 transitions. [2021-06-05 05:04:31,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:31,209 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1100 transitions. [2021-06-05 05:04:31,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:04:31,210 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:31,210 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:31,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 05:04:31,425 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:31,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:31,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1162212465, now seen corresponding path program 11 times [2021-06-05 05:04:31,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:31,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265276227] [2021-06-05 05:04:31,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:31,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:31,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:31,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:31,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265276227] [2021-06-05 05:04:31,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265276227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:31,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240891328] [2021-06-05 05:04:31,444 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:31,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:04:31,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:31,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:04:31,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:31,506 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:04:31,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240891328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:31,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:31,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 05:04:31,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603371684] [2021-06-05 05:04:31,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:04:31,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:31,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:04:31,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:04:31,508 INFO L87 Difference]: Start difference. First operand 474 states and 1100 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:31,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:31,585 INFO L93 Difference]: Finished difference Result 699 states and 1561 transitions. [2021-06-05 05:04:31,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:04:31,585 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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 25 [2021-06-05 05:04:31,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:31,588 INFO L225 Difference]: With dead ends: 699 [2021-06-05 05:04:31,588 INFO L226 Difference]: Without dead ends: 699 [2021-06-05 05:04:31,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:04:31,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-06-05 05:04:31,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 552. [2021-06-05 05:04:31,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 2.3611615245009077) internal successors, (1301), 551 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:31,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 1301 transitions. [2021-06-05 05:04:31,600 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 1301 transitions. Word has length 25 [2021-06-05 05:04:31,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:31,601 INFO L482 AbstractCegarLoop]: Abstraction has 552 states and 1301 transitions. [2021-06-05 05:04:31,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:31,601 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 1301 transitions. [2021-06-05 05:04:31,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:04:31,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:31,602 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:31,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 05:04:31,817 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:31,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:31,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1664080209, now seen corresponding path program 12 times [2021-06-05 05:04:31,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:31,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728894879] [2021-06-05 05:04:31,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:31,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:31,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:31,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728894879] [2021-06-05 05:04:31,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728894879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:31,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869959979] [2021-06-05 05:04:31,845 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) [2021-06-05 05:04:31,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:04:31,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:31,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:04:31,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:31,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:04:31,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869959979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:31,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:31,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 05:04:31,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704797839] [2021-06-05 05:04:31,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:04:31,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:31,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:04:31,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:04:31,908 INFO L87 Difference]: Start difference. First operand 552 states and 1301 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:31,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:31,987 INFO L93 Difference]: Finished difference Result 875 states and 2015 transitions. [2021-06-05 05:04:31,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:04:31,987 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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 25 [2021-06-05 05:04:31,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:31,990 INFO L225 Difference]: With dead ends: 875 [2021-06-05 05:04:31,990 INFO L226 Difference]: Without dead ends: 872 [2021-06-05 05:04:31,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:04:31,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2021-06-05 05:04:31,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 717. [2021-06-05 05:04:32,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 2.403631284916201) internal successors, (1721), 716 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:32,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 1721 transitions. [2021-06-05 05:04:32,002 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 1721 transitions. Word has length 25 [2021-06-05 05:04:32,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:32,002 INFO L482 AbstractCegarLoop]: Abstraction has 717 states and 1721 transitions. [2021-06-05 05:04:32,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:32,002 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 1721 transitions. [2021-06-05 05:04:32,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:04:32,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:32,003 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:32,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:32,217 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:32,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:32,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1322657579, now seen corresponding path program 13 times [2021-06-05 05:04:32,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:32,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285747452] [2021-06-05 05:04:32,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:32,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:32,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:32,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:32,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285747452] [2021-06-05 05:04:32,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285747452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:32,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567838651] [2021-06-05 05:04:32,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:32,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:32,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:04:32,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:04:32,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567838651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:32,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:32,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 05:04:32,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13779125] [2021-06-05 05:04:32,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:04:32,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:32,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:04:32,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:04:32,303 INFO L87 Difference]: Start difference. First operand 717 states and 1721 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:32,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:32,376 INFO L93 Difference]: Finished difference Result 880 states and 2012 transitions. [2021-06-05 05:04:32,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:04:32,376 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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 25 [2021-06-05 05:04:32,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:32,378 INFO L225 Difference]: With dead ends: 880 [2021-06-05 05:04:32,378 INFO L226 Difference]: Without dead ends: 880 [2021-06-05 05:04:32,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:04:32,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-06-05 05:04:32,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 703. [2021-06-05 05:04:32,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 2.4017094017094016) internal successors, (1686), 702 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:32,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1686 transitions. [2021-06-05 05:04:32,389 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1686 transitions. Word has length 25 [2021-06-05 05:04:32,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:32,389 INFO L482 AbstractCegarLoop]: Abstraction has 703 states and 1686 transitions. [2021-06-05 05:04:32,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:32,389 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1686 transitions. [2021-06-05 05:04:32,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:04:32,390 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:32,390 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:32,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 05:04:32,605 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:32,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:32,605 INFO L82 PathProgramCache]: Analyzing trace with hash -2065651895, now seen corresponding path program 14 times [2021-06-05 05:04:32,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:32,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744617542] [2021-06-05 05:04:32,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:32,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:32,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:32,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:32,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744617542] [2021-06-05 05:04:32,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744617542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:32,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572200057] [2021-06-05 05:04:32,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:32,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:04:32,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:32,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:04:32,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:32,688 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:04:32,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572200057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:32,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:32,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 05:04:32,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254667447] [2021-06-05 05:04:32,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:04:32,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:32,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:04:32,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:04:32,689 INFO L87 Difference]: Start difference. First operand 703 states and 1686 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:32,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:32,796 INFO L93 Difference]: Finished difference Result 810 states and 1869 transitions. [2021-06-05 05:04:32,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:04:32,796 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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 25 [2021-06-05 05:04:32,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:32,798 INFO L225 Difference]: With dead ends: 810 [2021-06-05 05:04:32,798 INFO L226 Difference]: Without dead ends: 806 [2021-06-05 05:04:32,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:04:32,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2021-06-05 05:04:32,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 703. [2021-06-05 05:04:32,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 2.4002849002849005) internal successors, (1685), 702 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:32,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1685 transitions. [2021-06-05 05:04:32,808 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1685 transitions. Word has length 25 [2021-06-05 05:04:32,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:32,809 INFO L482 AbstractCegarLoop]: Abstraction has 703 states and 1685 transitions. [2021-06-05 05:04:32,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:32,809 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1685 transitions. [2021-06-05 05:04:32,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:04:32,810 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:32,810 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:33,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 05:04:33,021 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:33,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:33,021 INFO L82 PathProgramCache]: Analyzing trace with hash 893466037, now seen corresponding path program 15 times [2021-06-05 05:04:33,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:33,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857598250] [2021-06-05 05:04:33,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:33,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:33,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:33,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:33,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857598250] [2021-06-05 05:04:33,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857598250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:33,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137846371] [2021-06-05 05:04:33,042 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) [2021-06-05 05:04:33,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:04:33,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:33,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:04:33,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:33,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:33,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137846371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:33,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:33,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 05:04:33,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187993857] [2021-06-05 05:04:33,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:04:33,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:33,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:04:33,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:04:33,120 INFO L87 Difference]: Start difference. First operand 703 states and 1685 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:33,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:33,209 INFO L93 Difference]: Finished difference Result 795 states and 1844 transitions. [2021-06-05 05:04:33,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:04:33,209 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 25 [2021-06-05 05:04:33,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:33,211 INFO L225 Difference]: With dead ends: 795 [2021-06-05 05:04:33,211 INFO L226 Difference]: Without dead ends: 795 [2021-06-05 05:04:33,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:04:33,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2021-06-05 05:04:33,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 698. [2021-06-05 05:04:33,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 2.3916786226685796) internal successors, (1667), 697 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:33,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1667 transitions. [2021-06-05 05:04:33,222 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1667 transitions. Word has length 25 [2021-06-05 05:04:33,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:33,222 INFO L482 AbstractCegarLoop]: Abstraction has 698 states and 1667 transitions. [2021-06-05 05:04:33,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:33,222 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1667 transitions. [2021-06-05 05:04:33,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:04:33,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:33,223 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:33,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:33,442 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:33,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:33,442 INFO L82 PathProgramCache]: Analyzing trace with hash -886523081, now seen corresponding path program 16 times [2021-06-05 05:04:33,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:33,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992288180] [2021-06-05 05:04:33,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:33,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:33,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:33,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:33,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992288180] [2021-06-05 05:04:33,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992288180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:33,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110081222] [2021-06-05 05:04:33,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:33,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:04:33,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:33,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:04:33,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:33,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:33,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110081222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:33,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:33,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 05:04:33,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57976369] [2021-06-05 05:04:33,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:04:33,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:33,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:04:33,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:04:33,518 INFO L87 Difference]: Start difference. First operand 698 states and 1667 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:33,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:33,607 INFO L93 Difference]: Finished difference Result 856 states and 1953 transitions. [2021-06-05 05:04:33,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:04:33,607 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 25 [2021-06-05 05:04:33,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:33,609 INFO L225 Difference]: With dead ends: 856 [2021-06-05 05:04:33,609 INFO L226 Difference]: Without dead ends: 835 [2021-06-05 05:04:33,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:04:33,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-06-05 05:04:33,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 719. [2021-06-05 05:04:33,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 2.370473537604457) internal successors, (1702), 718 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:33,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 1702 transitions. [2021-06-05 05:04:33,621 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 1702 transitions. Word has length 25 [2021-06-05 05:04:33,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:33,621 INFO L482 AbstractCegarLoop]: Abstraction has 719 states and 1702 transitions. [2021-06-05 05:04:33,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:33,621 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 1702 transitions. [2021-06-05 05:04:33,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:04:33,643 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:33,643 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:33,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:33,843 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:33,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:33,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1579561346, now seen corresponding path program 17 times [2021-06-05 05:04:33,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:33,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938624940] [2021-06-05 05:04:33,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:33,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:34,101 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:34,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:34,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938624940] [2021-06-05 05:04:34,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938624940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:34,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368205427] [2021-06-05 05:04:34,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:34,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:04:34,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:34,124 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:04:34,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:34,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 05:04:34,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:34,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:34,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:04:34,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:04:34,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:34,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368205427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:34,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:34,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-06-05 05:04:34,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380426813] [2021-06-05 05:04:34,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:04:34,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:34,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:04:34,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:04:34,320 INFO L87 Difference]: Start difference. First operand 719 states and 1702 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:35,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:35,280 INFO L93 Difference]: Finished difference Result 1938 states and 4685 transitions. [2021-06-05 05:04:35,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:04:35,280 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 29 [2021-06-05 05:04:35,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:35,285 INFO L225 Difference]: With dead ends: 1938 [2021-06-05 05:04:35,285 INFO L226 Difference]: Without dead ends: 1928 [2021-06-05 05:04:35,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 595.6ms TimeCoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:04:35,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-06-05 05:04:35,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 773. [2021-06-05 05:04:35,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 2.36139896373057) internal successors, (1823), 772 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:35,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 1823 transitions. [2021-06-05 05:04:35,300 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 1823 transitions. Word has length 29 [2021-06-05 05:04:35,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:35,301 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 1823 transitions. [2021-06-05 05:04:35,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:35,301 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 1823 transitions. [2021-06-05 05:04:35,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:04:35,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:35,303 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:35,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:35,519 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:35,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:35,519 INFO L82 PathProgramCache]: Analyzing trace with hash 298021654, now seen corresponding path program 18 times [2021-06-05 05:04:35,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:35,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939559477] [2021-06-05 05:04:35,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:35,762 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:35,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:35,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939559477] [2021-06-05 05:04:35,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939559477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:35,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606144294] [2021-06-05 05:04:35,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:35,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:04:35,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:35,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:04:35,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:35,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 05:04:35,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:35,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:35,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:04:35,923 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:13 [2021-06-05 05:04:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:35,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606144294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:35,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:35,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-06-05 05:04:35,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778340424] [2021-06-05 05:04:35,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:04:35,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:35,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:04:35,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:04:35,948 INFO L87 Difference]: Start difference. First operand 773 states and 1823 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:36,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:36,921 INFO L93 Difference]: Finished difference Result 2173 states and 5321 transitions. [2021-06-05 05:04:36,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:04:36,921 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:04:36,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:36,927 INFO L225 Difference]: With dead ends: 2173 [2021-06-05 05:04:36,927 INFO L226 Difference]: Without dead ends: 2162 [2021-06-05 05:04:36,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 719.9ms TimeCoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:04:36,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2021-06-05 05:04:36,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 807. [2021-06-05 05:04:36,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 2.3734491315136474) internal successors, (1913), 806 states have internal predecessors, (1913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:36,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1913 transitions. [2021-06-05 05:04:36,944 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1913 transitions. Word has length 29 [2021-06-05 05:04:36,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:36,944 INFO L482 AbstractCegarLoop]: Abstraction has 807 states and 1913 transitions. [2021-06-05 05:04:36,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:36,944 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1913 transitions. [2021-06-05 05:04:36,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:04:36,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:36,945 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:37,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 05:04:37,157 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:37,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:37,157 INFO L82 PathProgramCache]: Analyzing trace with hash 2054422704, now seen corresponding path program 19 times [2021-06-05 05:04:37,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:37,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494432893] [2021-06-05 05:04:37,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:37,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:37,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:37,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:37,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494432893] [2021-06-05 05:04:37,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494432893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:37,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604291986] [2021-06-05 05:04:37,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:37,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:04:37,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:37,544 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 28 treesize of output 16 [2021-06-05 05:04:37,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:37,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:37,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:04:37,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:13 [2021-06-05 05:04:37,574 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:37,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604291986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:37,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:37,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-06-05 05:04:37,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194083675] [2021-06-05 05:04:37,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:04:37,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:37,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:04:37,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:04:37,576 INFO L87 Difference]: Start difference. First operand 807 states and 1913 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:38,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:38,648 INFO L93 Difference]: Finished difference Result 2310 states and 5631 transitions. [2021-06-05 05:04:38,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:04:38,648 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:04:38,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:38,654 INFO L225 Difference]: With dead ends: 2310 [2021-06-05 05:04:38,654 INFO L226 Difference]: Without dead ends: 2290 [2021-06-05 05:04:38,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 729.2ms TimeCoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:04:38,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2021-06-05 05:04:38,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 796. [2021-06-05 05:04:38,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 2.372327044025157) internal successors, (1886), 795 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:38,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1886 transitions. [2021-06-05 05:04:38,669 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1886 transitions. Word has length 29 [2021-06-05 05:04:38,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:38,669 INFO L482 AbstractCegarLoop]: Abstraction has 796 states and 1886 transitions. [2021-06-05 05:04:38,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:38,669 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1886 transitions. [2021-06-05 05:04:38,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:04:38,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:38,670 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:38,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 05:04:38,885 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:38,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:38,885 INFO L82 PathProgramCache]: Analyzing trace with hash 483082792, now seen corresponding path program 20 times [2021-06-05 05:04:38,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:38,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515704863] [2021-06-05 05:04:38,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:39,133 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:39,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:39,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515704863] [2021-06-05 05:04:39,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515704863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:39,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795517558] [2021-06-05 05:04:39,134 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:39,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:04:39,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:39,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:04:39,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:39,313 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 28 treesize of output 16 [2021-06-05 05:04:39,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:39,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:39,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:04:39,319 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:04:39,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:39,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795517558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:39,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:39,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-06-05 05:04:39,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806435947] [2021-06-05 05:04:39,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:04:39,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:39,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:04:39,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:04:39,344 INFO L87 Difference]: Start difference. First operand 796 states and 1886 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:40,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:40,473 INFO L93 Difference]: Finished difference Result 2101 states and 5071 transitions. [2021-06-05 05:04:40,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:04:40,474 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:04:40,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:40,479 INFO L225 Difference]: With dead ends: 2101 [2021-06-05 05:04:40,480 INFO L226 Difference]: Without dead ends: 2078 [2021-06-05 05:04:40,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 747.7ms TimeCoverageRelationStatistics Valid=252, Invalid=804, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:04:40,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2021-06-05 05:04:40,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 800. [2021-06-05 05:04:40,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.3667083854818523) internal successors, (1891), 799 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:40,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1891 transitions. [2021-06-05 05:04:40,493 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1891 transitions. Word has length 29 [2021-06-05 05:04:40,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:40,493 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 1891 transitions. [2021-06-05 05:04:40,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:40,493 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1891 transitions. [2021-06-05 05:04:40,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:04:40,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:40,494 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:40,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:40,709 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:40,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:40,709 INFO L82 PathProgramCache]: Analyzing trace with hash -830162232, now seen corresponding path program 21 times [2021-06-05 05:04:40,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:40,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277812147] [2021-06-05 05:04:40,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:40,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:40,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:40,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:40,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277812147] [2021-06-05 05:04:40,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277812147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:40,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038236834] [2021-06-05 05:04:40,924 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:40,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:04:40,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:40,950 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:04:40,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:41,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:04:41,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:41,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 05:04:41,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:41,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:41,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:04:41,250 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:10 [2021-06-05 05:04:41,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:41,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038236834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:41,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:41,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 05:04:41,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890649385] [2021-06-05 05:04:41,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:04:41,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:41,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:04:41,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:04:41,272 INFO L87 Difference]: Start difference. First operand 800 states and 1891 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:42,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:42,514 INFO L93 Difference]: Finished difference Result 1859 states and 4469 transitions. [2021-06-05 05:04:42,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:04:42,514 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:04:42,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:42,517 INFO L225 Difference]: With dead ends: 1859 [2021-06-05 05:04:42,517 INFO L226 Difference]: Without dead ends: 1849 [2021-06-05 05:04:42,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 911.6ms TimeCoverageRelationStatistics Valid=268, Invalid=1064, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:04:42,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2021-06-05 05:04:42,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 800. [2021-06-05 05:04:42,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.3667083854818523) internal successors, (1891), 799 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:42,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1891 transitions. [2021-06-05 05:04:42,534 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1891 transitions. Word has length 29 [2021-06-05 05:04:42,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:42,534 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 1891 transitions. [2021-06-05 05:04:42,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:42,535 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1891 transitions. [2021-06-05 05:04:42,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:04:42,536 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:42,536 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:42,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 05:04:42,749 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:42,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:42,749 INFO L82 PathProgramCache]: Analyzing trace with hash 813575516, now seen corresponding path program 22 times [2021-06-05 05:04:42,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:42,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178847929] [2021-06-05 05:04:42,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:42,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:42,985 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:42,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:42,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178847929] [2021-06-05 05:04:42,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178847929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:42,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716190660] [2021-06-05 05:04:42,986 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:43,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:04:43,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:43,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:04:43,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:43,162 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 28 treesize of output 16 [2021-06-05 05:04:43,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:43,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:43,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:04:43,167 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:04:43,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:43,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716190660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:43,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:43,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2021-06-05 05:04:43,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779966874] [2021-06-05 05:04:43,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:04:43,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:43,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:04:43,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:04:43,190 INFO L87 Difference]: Start difference. First operand 800 states and 1891 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:44,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:44,546 INFO L93 Difference]: Finished difference Result 2092 states and 5123 transitions. [2021-06-05 05:04:44,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:04:44,547 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:04:44,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:44,550 INFO L225 Difference]: With dead ends: 2092 [2021-06-05 05:04:44,550 INFO L226 Difference]: Without dead ends: 2083 [2021-06-05 05:04:44,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 831.4ms TimeCoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:04:44,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2021-06-05 05:04:44,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 825. [2021-06-05 05:04:44,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 2.371359223300971) internal successors, (1954), 824 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:44,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1954 transitions. [2021-06-05 05:04:44,563 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1954 transitions. Word has length 29 [2021-06-05 05:04:44,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:44,564 INFO L482 AbstractCegarLoop]: Abstraction has 825 states and 1954 transitions. [2021-06-05 05:04:44,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:44,564 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1954 transitions. [2021-06-05 05:04:44,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:04:44,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:44,565 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:44,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:44,781 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:44,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:44,781 INFO L82 PathProgramCache]: Analyzing trace with hash 193088380, now seen corresponding path program 23 times [2021-06-05 05:04:44,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:44,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496887362] [2021-06-05 05:04:44,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:45,015 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:45,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:45,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496887362] [2021-06-05 05:04:45,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496887362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:45,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477573398] [2021-06-05 05:04:45,015 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:04:45,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:04:45,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:45,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:04:45,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:45,173 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 05:04:45,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 51 [2021-06-05 05:04:45,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:45,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:45,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:04:45,180 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:96, output treesize:13 [2021-06-05 05:04:45,203 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:45,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477573398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:45,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:45,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 17 [2021-06-05 05:04:45,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574447904] [2021-06-05 05:04:45,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:04:45,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:45,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:04:45,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:04:45,204 INFO L87 Difference]: Start difference. First operand 825 states and 1954 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:46,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:46,245 INFO L93 Difference]: Finished difference Result 2113 states and 5192 transitions. [2021-06-05 05:04:46,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:04:46,245 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:04:46,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:46,248 INFO L225 Difference]: With dead ends: 2113 [2021-06-05 05:04:46,248 INFO L226 Difference]: Without dead ends: 2102 [2021-06-05 05:04:46,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 745.4ms TimeCoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:04:46,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2021-06-05 05:04:46,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 837. [2021-06-05 05:04:46,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 2.373205741626794) internal successors, (1984), 836 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:46,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1984 transitions. [2021-06-05 05:04:46,262 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1984 transitions. Word has length 29 [2021-06-05 05:04:46,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:46,262 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 1984 transitions. [2021-06-05 05:04:46,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:46,262 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1984 transitions. [2021-06-05 05:04:46,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:04:46,263 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:46,263 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:46,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 05:04:46,477 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:46,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:46,477 INFO L82 PathProgramCache]: Analyzing trace with hash 858291548, now seen corresponding path program 24 times [2021-06-05 05:04:46,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:46,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504202209] [2021-06-05 05:04:46,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:46,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:46,711 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:46,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:46,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504202209] [2021-06-05 05:04:46,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504202209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:46,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598597789] [2021-06-05 05:04:46,711 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:46,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:04:46,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:46,735 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:04:46,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:46,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:46,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 05:04:46,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 05:04:46,976 INFO L628 ElimStorePlain]: treesize reduction 24, result has 65.2 percent of original size [2021-06-05 05:04:46,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:04:46,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:45 [2021-06-05 05:04:47,096 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:47,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598597789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:47,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:47,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 05:04:47,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604046434] [2021-06-05 05:04:47,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:04:47,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:47,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:04:47,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:04:47,097 INFO L87 Difference]: Start difference. First operand 837 states and 1984 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:49,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:49,295 INFO L93 Difference]: Finished difference Result 2331 states and 5739 transitions. [2021-06-05 05:04:49,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:04:49,296 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:04:49,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:49,298 INFO L225 Difference]: With dead ends: 2331 [2021-06-05 05:04:49,298 INFO L226 Difference]: Without dead ends: 2310 [2021-06-05 05:04:49,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 1567.7ms TimeCoverageRelationStatistics Valid=355, Invalid=2095, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:04:49,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-06-05 05:04:49,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 824. [2021-06-05 05:04:49,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 2.3718104495747268) internal successors, (1952), 823 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:49,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1952 transitions. [2021-06-05 05:04:49,320 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1952 transitions. Word has length 29 [2021-06-05 05:04:49,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:49,320 INFO L482 AbstractCegarLoop]: Abstraction has 824 states and 1952 transitions. [2021-06-05 05:04:49,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:49,320 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1952 transitions. [2021-06-05 05:04:49,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:04:49,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:49,321 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:49,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 05:04:49,536 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:49,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:49,536 INFO L82 PathProgramCache]: Analyzing trace with hash -949069254, now seen corresponding path program 25 times [2021-06-05 05:04:49,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:49,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306808374] [2021-06-05 05:04:49,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:49,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:49,799 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:49,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:49,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306808374] [2021-06-05 05:04:49,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306808374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:49,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388760675] [2021-06-05 05:04:49,799 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:04:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:49,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:04:49,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:49,969 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 05:04:49,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 51 [2021-06-05 05:04:49,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:49,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:49,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:04:49,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:96, output treesize:13 [2021-06-05 05:04:50,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:50,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388760675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:50,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:50,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-06-05 05:04:50,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329845456] [2021-06-05 05:04:50,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:04:50,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:50,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:04:50,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:04:50,001 INFO L87 Difference]: Start difference. First operand 824 states and 1952 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:51,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:51,151 INFO L93 Difference]: Finished difference Result 2128 states and 5217 transitions. [2021-06-05 05:04:51,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:04:51,151 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:04:51,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:51,154 INFO L225 Difference]: With dead ends: 2128 [2021-06-05 05:04:51,154 INFO L226 Difference]: Without dead ends: 2117 [2021-06-05 05:04:51,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 798.8ms TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:04:51,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2117 states. [2021-06-05 05:04:51,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2117 to 845. [2021-06-05 05:04:51,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 2.376777251184834) internal successors, (2006), 844 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:51,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2006 transitions. [2021-06-05 05:04:51,167 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2006 transitions. Word has length 29 [2021-06-05 05:04:51,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:51,167 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2006 transitions. [2021-06-05 05:04:51,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:51,167 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2006 transitions. [2021-06-05 05:04:51,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:04:51,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:51,168 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:51,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 05:04:51,393 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:51,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:51,393 INFO L82 PathProgramCache]: Analyzing trace with hash 807331796, now seen corresponding path program 26 times [2021-06-05 05:04:51,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:51,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042359830] [2021-06-05 05:04:51,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:51,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:51,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:51,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042359830] [2021-06-05 05:04:51,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042359830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:51,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779438777] [2021-06-05 05:04:51,652 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:04:51,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:04:51,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:51,687 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:51,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:51,795 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 28 treesize of output 16 [2021-06-05 05:04:51,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:51,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:51,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:04:51,801 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:13 [2021-06-05 05:04:51,825 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:51,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779438777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:51,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:51,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-06-05 05:04:51,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121322861] [2021-06-05 05:04:51,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:04:51,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:51,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:04:51,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:04:51,826 INFO L87 Difference]: Start difference. First operand 845 states and 2006 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:53,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:53,196 INFO L93 Difference]: Finished difference Result 2243 states and 5486 transitions. [2021-06-05 05:04:53,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:04:53,196 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:04:53,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:53,199 INFO L225 Difference]: With dead ends: 2243 [2021-06-05 05:04:53,199 INFO L226 Difference]: Without dead ends: 2223 [2021-06-05 05:04:53,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1026.9ms TimeCoverageRelationStatistics Valid=319, Invalid=1163, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:04:53,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2021-06-05 05:04:53,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 833. [2021-06-05 05:04:53,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 2.373798076923077) internal successors, (1975), 832 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:53,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1975 transitions. [2021-06-05 05:04:53,212 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1975 transitions. Word has length 29 [2021-06-05 05:04:53,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:53,212 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 1975 transitions. [2021-06-05 05:04:53,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:53,213 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1975 transitions. [2021-06-05 05:04:53,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:04:53,213 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:53,214 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:53,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:53,429 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:53,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:53,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1958681432, now seen corresponding path program 27 times [2021-06-05 05:04:53,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:53,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910774560] [2021-06-05 05:04:53,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:53,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:53,684 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:53,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:53,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910774560] [2021-06-05 05:04:53,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910774560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:53,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312438361] [2021-06-05 05:04:53,684 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:53,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:04:53,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:53,715 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:04:53,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:53,930 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:53,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 35 [2021-06-05 05:04:53,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:04:53,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:53,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:04:53,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:109 [2021-06-05 05:04:54,270 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-06-05 05:04:54,311 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:54,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312438361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:54,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:54,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:04:54,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505692925] [2021-06-05 05:04:54,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:04:54,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:54,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:04:54,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:04:54,312 INFO L87 Difference]: Start difference. First operand 833 states and 1975 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:54,837 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-06-05 05:04:57,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:57,375 INFO L93 Difference]: Finished difference Result 2108 states and 5089 transitions. [2021-06-05 05:04:57,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:04:57,375 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:04:57,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:57,378 INFO L225 Difference]: With dead ends: 2108 [2021-06-05 05:04:57,378 INFO L226 Difference]: Without dead ends: 2088 [2021-06-05 05:04:57,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 2878.0ms TimeCoverageRelationStatistics Valid=649, Invalid=2891, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:04:57,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2088 states. [2021-06-05 05:04:57,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2088 to 841. [2021-06-05 05:04:57,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 2.3773809523809524) internal successors, (1997), 840 states have internal predecessors, (1997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:57,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1997 transitions. [2021-06-05 05:04:57,391 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1997 transitions. Word has length 29 [2021-06-05 05:04:57,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:57,391 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 1997 transitions. [2021-06-05 05:04:57,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:57,391 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1997 transitions. [2021-06-05 05:04:57,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:04:57,392 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:57,392 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:57,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 05:04:57,608 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:57,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:57,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1911744554, now seen corresponding path program 28 times [2021-06-05 05:04:57,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:57,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333911894] [2021-06-05 05:04:57,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:57,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:57,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:57,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:57,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333911894] [2021-06-05 05:04:57,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333911894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:57,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593696872] [2021-06-05 05:04:57,819 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:57,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:04:57,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:57,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:04:57,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:57,966 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 28 treesize of output 16 [2021-06-05 05:04:57,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:57,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:57,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:04:57,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:13 [2021-06-05 05:04:57,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:57,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593696872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:57,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:57,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-06-05 05:04:57,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11140685] [2021-06-05 05:04:57,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:04:57,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:57,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:04:57,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:04:57,997 INFO L87 Difference]: Start difference. First operand 841 states and 1997 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:58,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:58,795 INFO L93 Difference]: Finished difference Result 2251 states and 5527 transitions. [2021-06-05 05:04:58,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:04:58,795 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:04:58,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:58,797 INFO L225 Difference]: With dead ends: 2251 [2021-06-05 05:04:58,797 INFO L226 Difference]: Without dead ends: 2240 [2021-06-05 05:04:58,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 630.3ms TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:04:58,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2240 states. [2021-06-05 05:04:58,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2240 to 875. [2021-06-05 05:04:58,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 2.3878718535469106) internal successors, (2087), 874 states have internal predecessors, (2087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:58,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2087 transitions. [2021-06-05 05:04:58,811 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2087 transitions. Word has length 29 [2021-06-05 05:04:58,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:58,811 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 2087 transitions. [2021-06-05 05:04:58,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:58,811 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2087 transitions. [2021-06-05 05:04:58,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:04:58,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:58,812 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:59,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:59,022 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:59,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:59,023 INFO L82 PathProgramCache]: Analyzing trace with hash -626821692, now seen corresponding path program 29 times [2021-06-05 05:04:59,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:59,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11061715] [2021-06-05 05:04:59,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:59,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:59,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:59,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:59,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11061715] [2021-06-05 05:04:59,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11061715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:59,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284060674] [2021-06-05 05:04:59,222 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:59,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:04:59,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:59,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:04:59,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:59,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 05:04:59,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:59,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:59,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:04:59,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:13 [2021-06-05 05:04:59,381 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:59,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284060674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:59,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:59,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-06-05 05:04:59,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634483289] [2021-06-05 05:04:59,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:04:59,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:59,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:04:59,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:04:59,382 INFO L87 Difference]: Start difference. First operand 875 states and 2087 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:00,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:00,188 INFO L93 Difference]: Finished difference Result 2348 states and 5739 transitions. [2021-06-05 05:05:00,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:05:00,188 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:05:00,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:00,190 INFO L225 Difference]: With dead ends: 2348 [2021-06-05 05:05:00,190 INFO L226 Difference]: Without dead ends: 2328 [2021-06-05 05:05:00,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 711.9ms TimeCoverageRelationStatistics Valid=244, Invalid=878, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:05:00,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-05 05:05:00,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 850. [2021-06-05 05:05:00,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 2.380447585394582) internal successors, (2021), 849 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:00,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2021 transitions. [2021-06-05 05:05:00,203 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2021 transitions. Word has length 29 [2021-06-05 05:05:00,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:00,203 INFO L482 AbstractCegarLoop]: Abstraction has 850 states and 2021 transitions. [2021-06-05 05:05:00,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:00,203 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2021 transitions. [2021-06-05 05:05:00,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:05:00,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:00,204 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:00,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 05:05:00,419 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:00,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:00,420 INFO L82 PathProgramCache]: Analyzing trace with hash 2096805692, now seen corresponding path program 30 times [2021-06-05 05:05:00,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:00,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552416347] [2021-06-05 05:05:00,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:00,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:00,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:00,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:00,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552416347] [2021-06-05 05:05:00,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552416347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:00,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979016616] [2021-06-05 05:05:00,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:05:00,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:05:00,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:00,666 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:05:00,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:00,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:05:00,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:00,838 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 28 treesize of output 32 [2021-06-05 05:05:00,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:00,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:00,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:00,859 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:44 [2021-06-05 05:05:00,985 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:00,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979016616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:00,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:00,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 20 [2021-06-05 05:05:00,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972453345] [2021-06-05 05:05:00,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:05:00,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:00,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:05:00,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:05:00,987 INFO L87 Difference]: Start difference. First operand 850 states and 2021 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:02,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:02,536 INFO L93 Difference]: Finished difference Result 2256 states and 5439 transitions. [2021-06-05 05:05:02,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:05:02,536 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:05:02,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:02,539 INFO L225 Difference]: With dead ends: 2256 [2021-06-05 05:05:02,539 INFO L226 Difference]: Without dead ends: 2236 [2021-06-05 05:05:02,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1262.8ms TimeCoverageRelationStatistics Valid=343, Invalid=1063, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:05:02,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2021-06-05 05:05:02,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 853. [2021-06-05 05:05:02,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 2.380281690140845) internal successors, (2028), 852 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:02,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2028 transitions. [2021-06-05 05:05:02,552 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2028 transitions. Word has length 29 [2021-06-05 05:05:02,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:02,552 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2028 transitions. [2021-06-05 05:05:02,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:02,552 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2028 transitions. [2021-06-05 05:05:02,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:05:02,553 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:02,554 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:02,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-06-05 05:05:02,770 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:02,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:02,770 INFO L82 PathProgramCache]: Analyzing trace with hash 783560668, now seen corresponding path program 31 times [2021-06-05 05:05:02,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:02,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718896776] [2021-06-05 05:05:02,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:02,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:03,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:03,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:03,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718896776] [2021-06-05 05:05:03,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718896776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:03,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307572723] [2021-06-05 05:05:03,005 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:03,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:05:03,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:03,163 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 28 treesize of output 16 [2021-06-05 05:05:03,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:03,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:03,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:03,167 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:05:03,187 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:03,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307572723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:03,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:03,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-06-05 05:05:03,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921805054] [2021-06-05 05:05:03,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:05:03,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:03,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:05:03,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:05:03,188 INFO L87 Difference]: Start difference. First operand 853 states and 2028 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:03,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:03,984 INFO L93 Difference]: Finished difference Result 2014 states and 4879 transitions. [2021-06-05 05:05:03,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:05:03,984 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:05:03,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:03,990 INFO L225 Difference]: With dead ends: 2014 [2021-06-05 05:05:03,990 INFO L226 Difference]: Without dead ends: 2004 [2021-06-05 05:05:03,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 596.8ms TimeCoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:05:03,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2004 states. [2021-06-05 05:05:03,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2004 to 850. [2021-06-05 05:05:04,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 2.380447585394582) internal successors, (2021), 849 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:04,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2021 transitions. [2021-06-05 05:05:04,001 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2021 transitions. Word has length 29 [2021-06-05 05:05:04,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:04,001 INFO L482 AbstractCegarLoop]: Abstraction has 850 states and 2021 transitions. [2021-06-05 05:05:04,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:04,001 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2021 transitions. [2021-06-05 05:05:04,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:05:04,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:04,002 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:04,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 05:05:04,209 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:04,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:04,209 INFO L82 PathProgramCache]: Analyzing trace with hash -898246588, now seen corresponding path program 32 times [2021-06-05 05:05:04,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:04,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196658681] [2021-06-05 05:05:04,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:04,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:04,438 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:04,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:04,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196658681] [2021-06-05 05:05:04,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196658681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:04,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604564358] [2021-06-05 05:05:04,438 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:04,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:05:04,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:04,460 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:05:04,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:04,630 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:04,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 05:05:04,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:04,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:04,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:04,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:32 [2021-06-05 05:05:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:04,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604564358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:04,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:04,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 05:05:04,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969954568] [2021-06-05 05:05:04,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:05:04,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:04,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:05:04,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:05:04,769 INFO L87 Difference]: Start difference. First operand 850 states and 2021 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:06,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:06,888 INFO L93 Difference]: Finished difference Result 2408 states and 5830 transitions. [2021-06-05 05:05:06,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:05:06,888 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:05:06,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:06,890 INFO L225 Difference]: With dead ends: 2408 [2021-06-05 05:05:06,890 INFO L226 Difference]: Without dead ends: 2372 [2021-06-05 05:05:06,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1734.6ms TimeCoverageRelationStatistics Valid=474, Invalid=2076, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:05:06,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2372 states. [2021-06-05 05:05:06,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2372 to 844. [2021-06-05 05:05:06,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 2.377224199288256) internal successors, (2004), 843 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:06,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 2004 transitions. [2021-06-05 05:05:06,902 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 2004 transitions. Word has length 29 [2021-06-05 05:05:06,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:06,902 INFO L482 AbstractCegarLoop]: Abstraction has 844 states and 2004 transitions. [2021-06-05 05:05:06,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:06,903 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 2004 transitions. [2021-06-05 05:05:06,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:05:06,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:06,904 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:07,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 05:05:07,111 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:07,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:07,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1211178052, now seen corresponding path program 33 times [2021-06-05 05:05:07,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:07,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712854893] [2021-06-05 05:05:07,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:07,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:07,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:07,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:07,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712854893] [2021-06-05 05:05:07,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712854893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:07,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909936280] [2021-06-05 05:05:07,319 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:07,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:05:07,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:07,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:05:07,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:07,477 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 28 treesize of output 16 [2021-06-05 05:05:07,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:07,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:07,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:07,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:05:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:07,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909936280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:07,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:07,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-06-05 05:05:07,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239314611] [2021-06-05 05:05:07,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:05:07,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:07,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:05:07,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:05:07,508 INFO L87 Difference]: Start difference. First operand 844 states and 2004 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:08,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:08,553 INFO L93 Difference]: Finished difference Result 2149 states and 5171 transitions. [2021-06-05 05:05:08,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:05:08,553 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:05:08,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:08,555 INFO L225 Difference]: With dead ends: 2149 [2021-06-05 05:05:08,555 INFO L226 Difference]: Without dead ends: 2126 [2021-06-05 05:05:08,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 808.3ms TimeCoverageRelationStatistics Valid=260, Invalid=1000, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:05:08,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-06-05 05:05:08,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 824. [2021-06-05 05:05:08,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 2.3718104495747268) internal successors, (1952), 823 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:08,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1952 transitions. [2021-06-05 05:05:08,573 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1952 transitions. Word has length 29 [2021-06-05 05:05:08,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:08,573 INFO L482 AbstractCegarLoop]: Abstraction has 824 states and 1952 transitions. [2021-06-05 05:05:08,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:08,573 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1952 transitions. [2021-06-05 05:05:08,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:05:08,574 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:08,574 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:08,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:08,777 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:08,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:08,777 INFO L82 PathProgramCache]: Analyzing trace with hash -2108871402, now seen corresponding path program 34 times [2021-06-05 05:05:08,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:08,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294258823] [2021-06-05 05:05:08,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:08,997 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:08,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:08,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294258823] [2021-06-05 05:05:08,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294258823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:08,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344556906] [2021-06-05 05:05:08,998 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:09,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:05:09,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:09,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:05:09,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:09,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 05:05:09,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:09,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:09,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:09,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 05:05:09,241 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:09,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344556906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:09,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:09,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-05 05:05:09,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789905138] [2021-06-05 05:05:09,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:05:09,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:09,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:05:09,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:05:09,242 INFO L87 Difference]: Start difference. First operand 824 states and 1952 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:10,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:10,456 INFO L93 Difference]: Finished difference Result 2144 states and 5261 transitions. [2021-06-05 05:05:10,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:05:10,456 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) 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 29 [2021-06-05 05:05:10,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:10,458 INFO L225 Difference]: With dead ends: 2144 [2021-06-05 05:05:10,458 INFO L226 Difference]: Without dead ends: 2135 [2021-06-05 05:05:10,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 751.6ms TimeCoverageRelationStatistics Valid=195, Invalid=1065, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:05:10,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2021-06-05 05:05:10,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 846. [2021-06-05 05:05:10,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 2.3775147928994085) internal successors, (2009), 845 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:10,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 2009 transitions. [2021-06-05 05:05:10,470 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 2009 transitions. Word has length 29 [2021-06-05 05:05:10,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:10,470 INFO L482 AbstractCegarLoop]: Abstraction has 846 states and 2009 transitions. [2021-06-05 05:05:10,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:10,470 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 2009 transitions. [2021-06-05 05:05:10,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:05:10,471 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:10,471 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:10,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 05:05:10,671 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:10,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:10,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1835199664, now seen corresponding path program 35 times [2021-06-05 05:05:10,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:10,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532541920] [2021-06-05 05:05:10,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:10,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:10,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:10,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:10,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532541920] [2021-06-05 05:05:10,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532541920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:10,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601759745] [2021-06-05 05:05:10,892 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:10,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:05:10,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:10,930 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:05:10,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:11,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:05:11,074 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 25 treesize of output 13 [2021-06-05 05:05:11,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:11,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:11,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:11,079 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:05:11,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:11,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601759745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:11,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:11,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 05:05:11,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209027757] [2021-06-05 05:05:11,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:05:11,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:11,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:05:11,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:05:11,109 INFO L87 Difference]: Start difference. First operand 846 states and 2009 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:11,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:11,955 INFO L93 Difference]: Finished difference Result 2161 states and 5322 transitions. [2021-06-05 05:05:11,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:05:11,955 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 29 [2021-06-05 05:05:11,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:11,957 INFO L225 Difference]: With dead ends: 2161 [2021-06-05 05:05:11,957 INFO L226 Difference]: Without dead ends: 2150 [2021-06-05 05:05:11,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 698.8ms TimeCoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:05:11,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-06-05 05:05:11,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 858. [2021-06-05 05:05:11,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 2.379229871645274) internal successors, (2039), 857 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:11,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2039 transitions. [2021-06-05 05:05:11,969 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2039 transitions. Word has length 29 [2021-06-05 05:05:11,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:11,969 INFO L482 AbstractCegarLoop]: Abstraction has 858 states and 2039 transitions. [2021-06-05 05:05:11,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:11,969 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2039 transitions. [2021-06-05 05:05:11,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:05:11,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:11,970 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:12,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 05:05:12,170 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:12,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:12,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1169996496, now seen corresponding path program 36 times [2021-06-05 05:05:12,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:12,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449259043] [2021-06-05 05:05:12,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:12,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:12,392 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:12,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:12,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449259043] [2021-06-05 05:05:12,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449259043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:12,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813668024] [2021-06-05 05:05:12,393 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:12,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:05:12,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:12,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:05:12,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:12,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:05:12,568 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 25 treesize of output 13 [2021-06-05 05:05:12,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:12,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:12,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:12,574 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:05:12,608 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:12,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813668024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:12,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:12,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 05:05:12,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371950938] [2021-06-05 05:05:12,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:05:12,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:12,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:05:12,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:05:12,609 INFO L87 Difference]: Start difference. First operand 858 states and 2039 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:13,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:13,411 INFO L93 Difference]: Finished difference Result 2231 states and 5485 transitions. [2021-06-05 05:05:13,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:05:13,412 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 29 [2021-06-05 05:05:13,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:13,414 INFO L225 Difference]: With dead ends: 2231 [2021-06-05 05:05:13,414 INFO L226 Difference]: Without dead ends: 2211 [2021-06-05 05:05:13,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 699.2ms TimeCoverageRelationStatistics Valid=199, Invalid=857, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:05:13,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-06-05 05:05:13,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 837. [2021-06-05 05:05:13,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 2.374401913875598) internal successors, (1985), 836 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:13,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1985 transitions. [2021-06-05 05:05:13,425 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1985 transitions. Word has length 29 [2021-06-05 05:05:13,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:13,425 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 1985 transitions. [2021-06-05 05:05:13,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:13,425 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1985 transitions. [2021-06-05 05:05:13,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:05:13,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:13,426 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:13,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 05:05:13,637 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:13,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:13,637 INFO L82 PathProgramCache]: Analyzing trace with hash -476095038, now seen corresponding path program 37 times [2021-06-05 05:05:13,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:13,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886404186] [2021-06-05 05:05:13,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:13,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:13,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:13,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:13,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886404186] [2021-06-05 05:05:13,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886404186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:13,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034205194] [2021-06-05 05:05:13,869 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:13,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:13,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:05:13,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:14,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:05:14,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:05:14,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:14,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:14,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:14,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:05:14,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:14,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034205194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:14,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:14,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 05:05:14,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522671596] [2021-06-05 05:05:14,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:05:14,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:14,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:05:14,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:05:14,083 INFO L87 Difference]: Start difference. First operand 837 states and 1985 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:15,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:15,226 INFO L93 Difference]: Finished difference Result 2169 states and 5328 transitions. [2021-06-05 05:05:15,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:05:15,226 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) 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 29 [2021-06-05 05:05:15,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:15,229 INFO L225 Difference]: With dead ends: 2169 [2021-06-05 05:05:15,229 INFO L226 Difference]: Without dead ends: 2158 [2021-06-05 05:05:15,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 802.8ms TimeCoverageRelationStatistics Valid=268, Invalid=1064, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:05:15,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2021-06-05 05:05:15,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 858. [2021-06-05 05:05:15,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 2.379229871645274) internal successors, (2039), 857 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:15,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2039 transitions. [2021-06-05 05:05:15,240 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2039 transitions. Word has length 29 [2021-06-05 05:05:15,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:15,241 INFO L482 AbstractCegarLoop]: Abstraction has 858 states and 2039 transitions. [2021-06-05 05:05:15,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:15,241 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2039 transitions. [2021-06-05 05:05:15,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:05:15,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:15,242 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:15,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 05:05:15,442 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:15,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:15,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1280306012, now seen corresponding path program 38 times [2021-06-05 05:05:15,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:15,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275328947] [2021-06-05 05:05:15,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:15,673 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:15,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:15,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275328947] [2021-06-05 05:05:15,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275328947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:15,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464754137] [2021-06-05 05:05:15,673 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:15,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:05:15,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:15,695 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:05:15,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:15,810 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 19 treesize of output 11 [2021-06-05 05:05:15,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:15,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:15,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:15,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-06-05 05:05:15,850 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:15,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464754137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:15,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:15,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 05:05:15,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288071279] [2021-06-05 05:05:15,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:05:15,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:15,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:05:15,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:05:15,851 INFO L87 Difference]: Start difference. First operand 858 states and 2039 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:16,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:16,737 INFO L93 Difference]: Finished difference Result 2228 states and 5468 transitions. [2021-06-05 05:05:16,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:05:16,738 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) 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 29 [2021-06-05 05:05:16,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:16,739 INFO L225 Difference]: With dead ends: 2228 [2021-06-05 05:05:16,739 INFO L226 Difference]: Without dead ends: 2208 [2021-06-05 05:05:16,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 804.6ms TimeCoverageRelationStatistics Valid=263, Invalid=1069, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:05:16,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-06-05 05:05:16,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 846. [2021-06-05 05:05:16,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 2.3763313609467454) internal successors, (2008), 845 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:16,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 2008 transitions. [2021-06-05 05:05:16,751 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 2008 transitions. Word has length 29 [2021-06-05 05:05:16,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:16,751 INFO L482 AbstractCegarLoop]: Abstraction has 846 states and 2008 transitions. [2021-06-05 05:05:16,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:16,751 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 2008 transitions. [2021-06-05 05:05:16,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:05:16,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:16,752 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:16,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:16,953 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:16,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:16,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1485707216, now seen corresponding path program 39 times [2021-06-05 05:05:16,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:16,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239679970] [2021-06-05 05:05:16,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:16,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:17,187 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:17,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:17,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239679970] [2021-06-05 05:05:17,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239679970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:17,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034470729] [2021-06-05 05:05:17,187 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:17,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:05:17,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:17,210 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:05:17,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:17,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:17,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-06-05 05:05:17,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:05:17,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:17,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:17,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:219 [2021-06-05 05:05:17,665 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-06-05 05:05:17,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:17,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034470729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:17,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:17,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:05:17,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385143154] [2021-06-05 05:05:17,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:05:17,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:17,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:05:17,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:05:17,829 INFO L87 Difference]: Start difference. First operand 846 states and 2008 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:20,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:20,465 INFO L93 Difference]: Finished difference Result 2109 states and 5107 transitions. [2021-06-05 05:05:20,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:05:20,466 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 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 29 [2021-06-05 05:05:20,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:20,468 INFO L225 Difference]: With dead ends: 2109 [2021-06-05 05:05:20,468 INFO L226 Difference]: Without dead ends: 2089 [2021-06-05 05:05:20,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 2132.2ms TimeCoverageRelationStatistics Valid=444, Invalid=2526, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:05:20,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-06-05 05:05:20,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 860. [2021-06-05 05:05:20,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 2.3818393480791618) internal successors, (2046), 859 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:20,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2046 transitions. [2021-06-05 05:05:20,480 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2046 transitions. Word has length 29 [2021-06-05 05:05:20,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:20,480 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2046 transitions. [2021-06-05 05:05:20,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:20,480 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2046 transitions. [2021-06-05 05:05:20,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:05:20,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:20,481 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:20,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:20,696 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:20,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:20,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1983699818, now seen corresponding path program 40 times [2021-06-05 05:05:20,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:20,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602702278] [2021-06-05 05:05:20,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:20,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:20,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:20,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:20,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602702278] [2021-06-05 05:05:20,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602702278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:20,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835884203] [2021-06-05 05:05:20,910 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:20,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:05:20,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:20,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:05:20,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:21,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:05:21,071 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 25 treesize of output 13 [2021-06-05 05:05:21,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:21,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,075 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:05:21,104 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:21,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835884203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:21,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:21,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 05:05:21,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101777276] [2021-06-05 05:05:21,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:05:21,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:21,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:05:21,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:05:21,105 INFO L87 Difference]: Start difference. First operand 860 states and 2046 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:22,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:22,087 INFO L93 Difference]: Finished difference Result 2351 states and 5789 transitions. [2021-06-05 05:05:22,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:05:22,087 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) 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 29 [2021-06-05 05:05:22,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:22,089 INFO L225 Difference]: With dead ends: 2351 [2021-06-05 05:05:22,089 INFO L226 Difference]: Without dead ends: 2340 [2021-06-05 05:05:22,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 726.0ms TimeCoverageRelationStatistics Valid=246, Invalid=944, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:05:22,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2340 states. [2021-06-05 05:05:22,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2340 to 894. [2021-06-05 05:05:22,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 2.3919372900335945) internal successors, (2136), 893 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:22,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 2136 transitions. [2021-06-05 05:05:22,104 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 2136 transitions. Word has length 29 [2021-06-05 05:05:22,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:22,104 INFO L482 AbstractCegarLoop]: Abstraction has 894 states and 2136 transitions. [2021-06-05 05:05:22,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:22,104 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 2136 transitions. [2021-06-05 05:05:22,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:05:22,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:22,105 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:22,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:22,321 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:22,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:22,321 INFO L82 PathProgramCache]: Analyzing trace with hash -227298768, now seen corresponding path program 41 times [2021-06-05 05:05:22,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:22,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156639] [2021-06-05 05:05:22,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:22,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:22,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156639] [2021-06-05 05:05:22,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:22,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779153321] [2021-06-05 05:05:22,515 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:22,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:05:22,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:22,540 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:05:22,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:22,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:05:22,677 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 25 treesize of output 13 [2021-06-05 05:05:22,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:22,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:22,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:22,681 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:05:22,709 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:22,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779153321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:22,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:22,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 05:05:22,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937231159] [2021-06-05 05:05:22,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:05:22,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:22,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:05:22,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:05:22,710 INFO L87 Difference]: Start difference. First operand 894 states and 2136 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:23,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:23,723 INFO L93 Difference]: Finished difference Result 2421 states and 5936 transitions. [2021-06-05 05:05:23,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:05:23,723 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) 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 29 [2021-06-05 05:05:23,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:23,725 INFO L225 Difference]: With dead ends: 2421 [2021-06-05 05:05:23,725 INFO L226 Difference]: Without dead ends: 2401 [2021-06-05 05:05:23,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 821.2ms TimeCoverageRelationStatistics Valid=283, Invalid=1123, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:05:23,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2401 states. [2021-06-05 05:05:23,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2401 to 869. [2021-06-05 05:05:23,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 2.3847926267281108) internal successors, (2070), 868 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:23,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2070 transitions. [2021-06-05 05:05:23,738 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2070 transitions. Word has length 29 [2021-06-05 05:05:23,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:23,738 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 2070 transitions. [2021-06-05 05:05:23,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:23,738 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2070 transitions. [2021-06-05 05:05:23,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:05:23,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:23,739 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:23,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:23,940 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:23,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:23,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1798638680, now seen corresponding path program 42 times [2021-06-05 05:05:23,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:23,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092788876] [2021-06-05 05:05:23,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:23,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:24,127 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:24,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:24,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092788876] [2021-06-05 05:05:24,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092788876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:24,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122266228] [2021-06-05 05:05:24,127 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:24,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:05:24,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:24,168 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:05:24,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:24,422 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:24,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-06-05 05:05:24,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:05:24,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:24,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:24,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:168 [2021-06-05 05:05:24,620 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-06-05 05:05:24,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:24,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122266228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:24,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:24,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:05:24,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44141544] [2021-06-05 05:05:24,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:05:24,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:24,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:05:24,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:05:24,786 INFO L87 Difference]: Start difference. First operand 869 states and 2070 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:27,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:27,671 INFO L93 Difference]: Finished difference Result 2307 states and 5553 transitions. [2021-06-05 05:05:27,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:05:27,672 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 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 29 [2021-06-05 05:05:27,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:27,674 INFO L225 Difference]: With dead ends: 2307 [2021-06-05 05:05:27,674 INFO L226 Difference]: Without dead ends: 2271 [2021-06-05 05:05:27,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 2357.8ms TimeCoverageRelationStatistics Valid=535, Invalid=3247, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:05:27,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2021-06-05 05:05:27,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 866. [2021-06-05 05:05:27,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 2.3815028901734103) internal successors, (2060), 865 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:27,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2060 transitions. [2021-06-05 05:05:27,687 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2060 transitions. Word has length 29 [2021-06-05 05:05:27,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:27,687 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2060 transitions. [2021-06-05 05:05:27,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:27,687 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2060 transitions. [2021-06-05 05:05:27,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:05:27,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:27,688 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:27,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-06-05 05:05:27,903 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:27,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:27,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1183083592, now seen corresponding path program 43 times [2021-06-05 05:05:27,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:27,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814226220] [2021-06-05 05:05:27,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:27,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:28,098 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:28,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:28,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814226220] [2021-06-05 05:05:28,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814226220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:28,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783375536] [2021-06-05 05:05:28,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:28,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:28,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:05:28,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:28,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 05:05:28,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:28,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:28,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:28,288 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 05:05:28,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:28,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783375536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:28,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:28,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 05:05:28,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344304342] [2021-06-05 05:05:28,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:05:28,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:28,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:05:28,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:05:28,317 INFO L87 Difference]: Start difference. First operand 866 states and 2060 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:29,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:29,060 INFO L93 Difference]: Finished difference Result 1983 states and 4808 transitions. [2021-06-05 05:05:29,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:05:29,060 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:05:29,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:29,062 INFO L225 Difference]: With dead ends: 1983 [2021-06-05 05:05:29,062 INFO L226 Difference]: Without dead ends: 1973 [2021-06-05 05:05:29,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 595.5ms TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:05:29,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1973 states. [2021-06-05 05:05:29,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1973 to 861. [2021-06-05 05:05:29,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 2.3813953488372093) internal successors, (2048), 860 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:29,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2048 transitions. [2021-06-05 05:05:29,073 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2048 transitions. Word has length 29 [2021-06-05 05:05:29,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:29,073 INFO L482 AbstractCegarLoop]: Abstraction has 861 states and 2048 transitions. [2021-06-05 05:05:29,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:29,073 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2048 transitions. [2021-06-05 05:05:29,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:05:29,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:29,074 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:29,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:29,275 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:29,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:29,275 INFO L82 PathProgramCache]: Analyzing trace with hash 123407448, now seen corresponding path program 44 times [2021-06-05 05:05:29,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:29,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517409426] [2021-06-05 05:05:29,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:29,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:29,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:29,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517409426] [2021-06-05 05:05:29,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517409426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:29,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129165956] [2021-06-05 05:05:29,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:29,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:05:29,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:29,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:05:29,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:29,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:05:29,722 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 27 treesize of output 15 [2021-06-05 05:05:29,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:29,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:29,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:29,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-06-05 05:05:29,754 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:29,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129165956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:29,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:29,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 05:05:29,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469869157] [2021-06-05 05:05:29,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:05:29,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:29,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:05:29,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:05:29,755 INFO L87 Difference]: Start difference. First operand 861 states and 2048 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:30,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:30,962 INFO L93 Difference]: Finished difference Result 2000 states and 4855 transitions. [2021-06-05 05:05:30,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:05:30,963 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:05:30,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:30,965 INFO L225 Difference]: With dead ends: 2000 [2021-06-05 05:05:30,965 INFO L226 Difference]: Without dead ends: 1977 [2021-06-05 05:05:30,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 972.1ms TimeCoverageRelationStatistics Valid=244, Invalid=1238, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:05:30,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1977 states. [2021-06-05 05:05:30,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1977 to 842. [2021-06-05 05:05:30,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 2.3769322235434007) internal successors, (1999), 841 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:30,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1999 transitions. [2021-06-05 05:05:30,975 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1999 transitions. Word has length 29 [2021-06-05 05:05:30,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:30,975 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 1999 transitions. [2021-06-05 05:05:30,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:30,975 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1999 transitions. [2021-06-05 05:05:30,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:05:30,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:30,976 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:31,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 05:05:31,177 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:31,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:31,177 INFO L82 PathProgramCache]: Analyzing trace with hash -644766292, now seen corresponding path program 45 times [2021-06-05 05:05:31,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:31,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779924598] [2021-06-05 05:05:31,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:31,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:31,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:31,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:31,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779924598] [2021-06-05 05:05:31,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779924598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:31,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327681157] [2021-06-05 05:05:31,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:31,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:05:31,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:31,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:05:31,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:31,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:05:31,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 05:05:31,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:31,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:31,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:31,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-06-05 05:05:31,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:31,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327681157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:31,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:31,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 05:05:31,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054469950] [2021-06-05 05:05:31,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:05:31,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:31,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:05:31,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:05:31,662 INFO L87 Difference]: Start difference. First operand 842 states and 1999 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:33,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:33,181 INFO L93 Difference]: Finished difference Result 2007 states and 4906 transitions. [2021-06-05 05:05:33,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:05:33,182 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:05:33,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:33,183 INFO L225 Difference]: With dead ends: 2007 [2021-06-05 05:05:33,183 INFO L226 Difference]: Without dead ends: 1990 [2021-06-05 05:05:33,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1111.1ms TimeCoverageRelationStatistics Valid=271, Invalid=1535, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:05:33,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1990 states. [2021-06-05 05:05:33,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1990 to 863. [2021-06-05 05:05:33,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 2.3781902552204177) internal successors, (2050), 862 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:33,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2050 transitions. [2021-06-05 05:05:33,194 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2050 transitions. Word has length 29 [2021-06-05 05:05:33,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:33,194 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2050 transitions. [2021-06-05 05:05:33,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:33,194 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2050 transitions. [2021-06-05 05:05:33,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:05:33,195 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:33,195 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:33,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:33,395 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:33,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:33,396 INFO L82 PathProgramCache]: Analyzing trace with hash -371094554, now seen corresponding path program 46 times [2021-06-05 05:05:33,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:33,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35930970] [2021-06-05 05:05:33,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:33,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:33,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:33,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:33,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35930970] [2021-06-05 05:05:33,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35930970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:33,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067476325] [2021-06-05 05:05:33,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:33,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:05:33,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:33,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:05:33,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:33,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:05:33,788 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 25 treesize of output 13 [2021-06-05 05:05:33,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:33,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:33,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:33,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:05:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:33,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067476325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:33,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:33,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 05:05:33,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051814548] [2021-06-05 05:05:33,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:05:33,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:33,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:05:33,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:05:33,840 INFO L87 Difference]: Start difference. First operand 863 states and 2050 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:35,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:35,526 INFO L93 Difference]: Finished difference Result 2520 states and 6189 transitions. [2021-06-05 05:05:35,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:05:35,526 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:05:35,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:35,528 INFO L225 Difference]: With dead ends: 2520 [2021-06-05 05:05:35,528 INFO L226 Difference]: Without dead ends: 2505 [2021-06-05 05:05:35,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1400.2ms TimeCoverageRelationStatistics Valid=495, Invalid=2157, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:05:35,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2021-06-05 05:05:35,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 875. [2021-06-05 05:05:35,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 2.3787185354691074) internal successors, (2079), 874 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:35,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2079 transitions. [2021-06-05 05:05:35,540 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2079 transitions. Word has length 29 [2021-06-05 05:05:35,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:35,540 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 2079 transitions. [2021-06-05 05:05:35,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:35,541 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2079 transitions. [2021-06-05 05:05:35,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:05:35,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:35,542 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:35,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 05:05:35,742 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:35,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:35,742 INFO L82 PathProgramCache]: Analyzing trace with hash 294108614, now seen corresponding path program 47 times [2021-06-05 05:05:35,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:35,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494304961] [2021-06-05 05:05:35,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:35,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:35,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:35,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494304961] [2021-06-05 05:05:35,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494304961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:35,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996960596] [2021-06-05 05:05:35,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:36,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:05:36,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:36,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:05:36,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:36,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:05:36,162 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 25 treesize of output 13 [2021-06-05 05:05:36,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:36,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:36,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:36,167 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:05:36,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:36,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996960596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:36,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:36,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 05:05:36,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926382057] [2021-06-05 05:05:36,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:05:36,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:36,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:05:36,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:05:36,208 INFO L87 Difference]: Start difference. First operand 875 states and 2079 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:37,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:37,479 INFO L93 Difference]: Finished difference Result 2125 states and 5209 transitions. [2021-06-05 05:05:37,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:05:37,479 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) 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 29 [2021-06-05 05:05:37,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:37,482 INFO L225 Difference]: With dead ends: 2125 [2021-06-05 05:05:37,482 INFO L226 Difference]: Without dead ends: 2106 [2021-06-05 05:05:37,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 985.1ms TimeCoverageRelationStatistics Valid=296, Invalid=1264, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:05:37,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-06-05 05:05:37,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 864. [2021-06-05 05:05:37,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.3800695249130936) internal successors, (2054), 863 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:37,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2054 transitions. [2021-06-05 05:05:37,492 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2054 transitions. Word has length 29 [2021-06-05 05:05:37,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:37,493 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2054 transitions. [2021-06-05 05:05:37,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:37,493 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2054 transitions. [2021-06-05 05:05:37,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:05:37,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:37,494 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:37,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 05:05:37,694 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:37,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:37,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1194528790, now seen corresponding path program 48 times [2021-06-05 05:05:37,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:37,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921448406] [2021-06-05 05:05:37,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:37,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:37,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:37,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:37,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921448406] [2021-06-05 05:05:37,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921448406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:37,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122176519] [2021-06-05 05:05:37,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:37,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:05:37,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:37,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:05:37,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:38,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 05:05:38,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:38,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:38,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:38,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-06-05 05:05:38,098 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:38,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122176519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:38,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:38,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 05:05:38,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986770954] [2021-06-05 05:05:38,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:05:38,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:38,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:05:38,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:05:38,099 INFO L87 Difference]: Start difference. First operand 864 states and 2054 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:39,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:39,165 INFO L93 Difference]: Finished difference Result 2623 states and 6537 transitions. [2021-06-05 05:05:39,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:05:39,165 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 29 [2021-06-05 05:05:39,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:39,167 INFO L225 Difference]: With dead ends: 2623 [2021-06-05 05:05:39,168 INFO L226 Difference]: Without dead ends: 2610 [2021-06-05 05:05:39,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 890.0ms TimeCoverageRelationStatistics Valid=290, Invalid=1116, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:05:39,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2610 states. [2021-06-05 05:05:39,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2610 to 882. [2021-06-05 05:05:39,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 2.383654937570942) internal successors, (2100), 881 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:39,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2100 transitions. [2021-06-05 05:05:39,180 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2100 transitions. Word has length 29 [2021-06-05 05:05:39,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:39,180 INFO L482 AbstractCegarLoop]: Abstraction has 882 states and 2100 transitions. [2021-06-05 05:05:39,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:39,180 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2100 transitions. [2021-06-05 05:05:39,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:05:39,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:39,181 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:39,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 05:05:39,382 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:39,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:39,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1344037456, now seen corresponding path program 49 times [2021-06-05 05:05:39,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:39,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896446601] [2021-06-05 05:05:39,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:39,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:39,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:39,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896446601] [2021-06-05 05:05:39,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896446601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:39,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627153455] [2021-06-05 05:05:39,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:39,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:39,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:05:39,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:39,729 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 19 treesize of output 11 [2021-06-05 05:05:39,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:39,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:39,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:39,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-06-05 05:05:39,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:39,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627153455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:39,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:39,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 05:05:39,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38776462] [2021-06-05 05:05:39,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:05:39,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:39,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:05:39,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:05:39,764 INFO L87 Difference]: Start difference. First operand 882 states and 2100 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:40,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:40,731 INFO L93 Difference]: Finished difference Result 2328 states and 5765 transitions. [2021-06-05 05:05:40,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:05:40,731 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 29 [2021-06-05 05:05:40,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:40,733 INFO L225 Difference]: With dead ends: 2328 [2021-06-05 05:05:40,733 INFO L226 Difference]: Without dead ends: 2311 [2021-06-05 05:05:40,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 850.8ms TimeCoverageRelationStatistics Valid=278, Invalid=1054, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:05:40,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2311 states. [2021-06-05 05:05:40,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2311 to 868. [2021-06-05 05:05:40,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 2.3829296424452133) internal successors, (2066), 867 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:40,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2066 transitions. [2021-06-05 05:05:40,745 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2066 transitions. Word has length 29 [2021-06-05 05:05:40,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:40,745 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 2066 transitions. [2021-06-05 05:05:40,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:40,745 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2066 transitions. [2021-06-05 05:05:40,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:05:40,746 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:40,746 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:40,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 05:05:40,946 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:40,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:40,947 INFO L82 PathProgramCache]: Analyzing trace with hash 184916612, now seen corresponding path program 50 times [2021-06-05 05:05:40,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:40,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973427689] [2021-06-05 05:05:40,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:40,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:41,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:41,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:41,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973427689] [2021-06-05 05:05:41,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973427689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:41,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408115478] [2021-06-05 05:05:41,179 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:41,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:05:41,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:41,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:05:41,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:41,364 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 19 treesize of output 11 [2021-06-05 05:05:41,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:41,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:41,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:41,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 05:05:41,394 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:41,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408115478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:41,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:41,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-05 05:05:41,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756135080] [2021-06-05 05:05:41,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:05:41,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:41,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:05:41,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:05:41,395 INFO L87 Difference]: Start difference. First operand 868 states and 2066 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:42,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:42,342 INFO L93 Difference]: Finished difference Result 2109 states and 5162 transitions. [2021-06-05 05:05:42,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:05:42,343 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) 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 29 [2021-06-05 05:05:42,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:42,345 INFO L225 Difference]: With dead ends: 2109 [2021-06-05 05:05:42,345 INFO L226 Difference]: Without dead ends: 2099 [2021-06-05 05:05:42,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 690.9ms TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:05:42,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2099 states. [2021-06-05 05:05:42,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2099 to 857. [2021-06-05 05:05:42,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 2.3773364485981308) internal successors, (2035), 856 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:42,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2035 transitions. [2021-06-05 05:05:42,356 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2035 transitions. Word has length 29 [2021-06-05 05:05:42,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:42,356 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2035 transitions. [2021-06-05 05:05:42,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:42,356 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2035 transitions. [2021-06-05 05:05:42,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:05:42,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:42,357 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:42,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:42,572 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:42,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:42,572 INFO L82 PathProgramCache]: Analyzing trace with hash -989153706, now seen corresponding path program 51 times [2021-06-05 05:05:42,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:42,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830172277] [2021-06-05 05:05:42,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:42,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:42,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:42,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830172277] [2021-06-05 05:05:42,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830172277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:42,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649939377] [2021-06-05 05:05:42,785 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:42,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:05:42,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:42,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:05:42,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:42,972 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 19 treesize of output 11 [2021-06-05 05:05:42,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:42,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:42,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:42,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 05:05:43,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:43,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649939377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:43,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:43,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 05:05:43,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492474894] [2021-06-05 05:05:43,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:05:43,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:43,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:05:43,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:05:43,003 INFO L87 Difference]: Start difference. First operand 857 states and 2035 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:44,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:44,610 INFO L93 Difference]: Finished difference Result 2191 states and 5325 transitions. [2021-06-05 05:05:44,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:05:44,611 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:05:44,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:44,613 INFO L225 Difference]: With dead ends: 2191 [2021-06-05 05:05:44,613 INFO L226 Difference]: Without dead ends: 2174 [2021-06-05 05:05:44,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1058.4ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:05:44,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2021-06-05 05:05:44,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 875. [2021-06-05 05:05:44,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 2.3821510297482837) internal successors, (2082), 874 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:44,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2082 transitions. [2021-06-05 05:05:44,624 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2082 transitions. Word has length 29 [2021-06-05 05:05:44,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:44,624 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 2082 transitions. [2021-06-05 05:05:44,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:44,624 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2082 transitions. [2021-06-05 05:05:44,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:05:44,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:44,625 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:44,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 05:05:44,827 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:44,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:44,827 INFO L82 PathProgramCache]: Analyzing trace with hash -715481968, now seen corresponding path program 52 times [2021-06-05 05:05:44,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:44,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775214382] [2021-06-05 05:05:44,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:44,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:45,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:45,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:45,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775214382] [2021-06-05 05:05:45,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775214382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:45,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526087226] [2021-06-05 05:05:45,043 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:45,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:05:45,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:45,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:05:45,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:45,196 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 19 treesize of output 11 [2021-06-05 05:05:45,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:45,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:45,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:45,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-06-05 05:05:45,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:45,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526087226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:45,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:45,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 05:05:45,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286328583] [2021-06-05 05:05:45,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:05:45,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:45,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:05:45,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:05:45,248 INFO L87 Difference]: Start difference. First operand 875 states and 2082 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:46,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:46,902 INFO L93 Difference]: Finished difference Result 2635 states and 6476 transitions. [2021-06-05 05:05:46,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:05:46,903 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:05:46,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:46,905 INFO L225 Difference]: With dead ends: 2635 [2021-06-05 05:05:46,905 INFO L226 Difference]: Without dead ends: 2622 [2021-06-05 05:05:46,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1392.5ms TimeCoverageRelationStatistics Valid=481, Invalid=2069, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:05:46,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2622 states. [2021-06-05 05:05:46,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2622 to 891. [2021-06-05 05:05:46,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 2.385393258426966) internal successors, (2123), 890 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:46,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 2123 transitions. [2021-06-05 05:05:46,917 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 2123 transitions. Word has length 29 [2021-06-05 05:05:46,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:46,917 INFO L482 AbstractCegarLoop]: Abstraction has 891 states and 2123 transitions. [2021-06-05 05:05:46,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:46,918 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 2123 transitions. [2021-06-05 05:05:46,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:05:46,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:46,919 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:47,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 05:05:47,119 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:47,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:47,119 INFO L82 PathProgramCache]: Analyzing trace with hash -50278800, now seen corresponding path program 53 times [2021-06-05 05:05:47,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:47,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248457201] [2021-06-05 05:05:47,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:47,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:47,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:47,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:47,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248457201] [2021-06-05 05:05:47,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248457201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:47,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870762409] [2021-06-05 05:05:47,325 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:47,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:05:47,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:47,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:05:47,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:47,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:05:47,493 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 25 treesize of output 13 [2021-06-05 05:05:47,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:47,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:47,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:47,498 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:05:47,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:47,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870762409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:47,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:47,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 05:05:47,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593838806] [2021-06-05 05:05:47,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:05:47,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:47,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:05:47,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:05:47,527 INFO L87 Difference]: Start difference. First operand 891 states and 2123 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:48,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:48,670 INFO L93 Difference]: Finished difference Result 2228 states and 5467 transitions. [2021-06-05 05:05:48,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:05:48,671 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) 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 29 [2021-06-05 05:05:48,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:48,673 INFO L225 Difference]: With dead ends: 2228 [2021-06-05 05:05:48,673 INFO L226 Difference]: Without dead ends: 2210 [2021-06-05 05:05:48,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 835.1ms TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:05:48,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2021-06-05 05:05:48,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 864. [2021-06-05 05:05:48,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.381228273464658) internal successors, (2055), 863 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:48,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2055 transitions. [2021-06-05 05:05:48,684 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2055 transitions. Word has length 29 [2021-06-05 05:05:48,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:48,684 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2055 transitions. [2021-06-05 05:05:48,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:48,684 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2055 transitions. [2021-06-05 05:05:48,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:05:48,685 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:48,685 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:48,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:48,886 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:48,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:48,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1301042010, now seen corresponding path program 54 times [2021-06-05 05:05:48,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:48,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859331280] [2021-06-05 05:05:48,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:49,090 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:49,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:49,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859331280] [2021-06-05 05:05:49,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859331280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:49,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722293139] [2021-06-05 05:05:49,090 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:49,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:05:49,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:49,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:05:49,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:49,315 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-06-05 05:05:49,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 62 [2021-06-05 05:05:49,317 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:49,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:49,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:49,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:90, output treesize:7 [2021-06-05 05:05:49,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:49,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722293139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:49,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:49,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 05:05:49,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59595543] [2021-06-05 05:05:49,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:05:49,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:49,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:05:49,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:05:49,356 INFO L87 Difference]: Start difference. First operand 864 states and 2055 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:50,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:50,287 INFO L93 Difference]: Finished difference Result 2015 states and 4908 transitions. [2021-06-05 05:05:50,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:05:50,287 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:05:50,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:50,289 INFO L225 Difference]: With dead ends: 2015 [2021-06-05 05:05:50,289 INFO L226 Difference]: Without dead ends: 2006 [2021-06-05 05:05:50,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 743.8ms TimeCoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:05:50,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2021-06-05 05:05:50,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 866. [2021-06-05 05:05:50,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 2.3791907514450865) internal successors, (2058), 865 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:50,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2058 transitions. [2021-06-05 05:05:50,299 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2058 transitions. Word has length 29 [2021-06-05 05:05:50,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:50,299 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2058 transitions. [2021-06-05 05:05:50,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:50,300 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2058 transitions. [2021-06-05 05:05:50,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:05:50,300 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:50,300 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:50,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:50,501 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:50,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:50,501 INFO L82 PathProgramCache]: Analyzing trace with hash 880815196, now seen corresponding path program 55 times [2021-06-05 05:05:50,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:50,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676831410] [2021-06-05 05:05:50,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:50,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:50,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:50,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676831410] [2021-06-05 05:05:50,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676831410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:50,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242604595] [2021-06-05 05:05:50,687 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:50,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:50,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:05:50,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:50,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:05:50,877 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 27 treesize of output 15 [2021-06-05 05:05:50,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:50,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:50,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:50,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-06-05 05:05:50,914 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:50,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242604595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:50,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:50,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 05:05:50,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808349819] [2021-06-05 05:05:50,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:05:50,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:50,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:05:50,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:05:50,915 INFO L87 Difference]: Start difference. First operand 866 states and 2058 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:51,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:51,714 INFO L93 Difference]: Finished difference Result 2129 states and 5184 transitions. [2021-06-05 05:05:51,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:05:51,715 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:05:51,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:51,716 INFO L225 Difference]: With dead ends: 2129 [2021-06-05 05:05:51,716 INFO L226 Difference]: Without dead ends: 2120 [2021-06-05 05:05:51,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 594.9ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:05:51,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2021-06-05 05:05:51,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 902. [2021-06-05 05:05:51,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 2.3773584905660377) internal successors, (2142), 901 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:51,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 2142 transitions. [2021-06-05 05:05:51,727 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 2142 transitions. Word has length 29 [2021-06-05 05:05:51,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:51,728 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 2142 transitions. [2021-06-05 05:05:51,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:51,728 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 2142 transitions. [2021-06-05 05:05:51,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:05:51,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:51,729 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:51,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:51,944 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:51,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:51,944 INFO L82 PathProgramCache]: Analyzing trace with hash 591087582, now seen corresponding path program 56 times [2021-06-05 05:05:51,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:51,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355069326] [2021-06-05 05:05:51,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:52,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:52,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:52,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355069326] [2021-06-05 05:05:52,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355069326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:52,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574965525] [2021-06-05 05:05:52,127 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:52,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:05:52,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:52,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:05:52,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:52,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:05:52,306 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 27 treesize of output 15 [2021-06-05 05:05:52,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:52,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:52,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:52,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-06-05 05:05:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:52,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574965525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:52,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:52,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 05:05:52,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962129995] [2021-06-05 05:05:52,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:05:52,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:52,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:05:52,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:05:52,347 INFO L87 Difference]: Start difference. First operand 902 states and 2142 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:53,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:53,456 INFO L93 Difference]: Finished difference Result 2272 states and 5520 transitions. [2021-06-05 05:05:53,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:05:53,456 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:05:53,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:53,458 INFO L225 Difference]: With dead ends: 2272 [2021-06-05 05:05:53,458 INFO L226 Difference]: Without dead ends: 2255 [2021-06-05 05:05:53,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 722.1ms TimeCoverageRelationStatistics Valid=251, Invalid=939, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:05:53,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2021-06-05 05:05:53,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 920. [2021-06-05 05:05:53,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 2.381936887921654) internal successors, (2189), 919 states have internal predecessors, (2189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:53,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 2189 transitions. [2021-06-05 05:05:53,469 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 2189 transitions. Word has length 29 [2021-06-05 05:05:53,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:53,469 INFO L482 AbstractCegarLoop]: Abstraction has 920 states and 2189 transitions. [2021-06-05 05:05:53,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:53,469 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 2189 transitions. [2021-06-05 05:05:53,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:05:53,470 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:53,470 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:53,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-06-05 05:05:53,671 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:53,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:53,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1810375108, now seen corresponding path program 57 times [2021-06-05 05:05:53,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:53,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244177400] [2021-06-05 05:05:53,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:53,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:53,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:53,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244177400] [2021-06-05 05:05:53,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244177400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:53,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021316459] [2021-06-05 05:05:53,852 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:53,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:05:53,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:53,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:05:53,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:54,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:05:54,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:05:54,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:54,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:54,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:54,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:05:54,060 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:54,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021316459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:54,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:54,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 05:05:54,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866843698] [2021-06-05 05:05:54,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:05:54,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:54,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:05:54,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:05:54,061 INFO L87 Difference]: Start difference. First operand 920 states and 2189 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:55,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:55,311 INFO L93 Difference]: Finished difference Result 2706 states and 6630 transitions. [2021-06-05 05:05:55,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:05:55,311 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:05:55,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:55,314 INFO L225 Difference]: With dead ends: 2706 [2021-06-05 05:05:55,314 INFO L226 Difference]: Without dead ends: 2693 [2021-06-05 05:05:55,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 893.5ms TimeCoverageRelationStatistics Valid=357, Invalid=1283, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:05:55,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-06-05 05:05:55,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 936. [2021-06-05 05:05:55,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 935 states have (on average 2.3850267379679146) internal successors, (2230), 935 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:55,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 2230 transitions. [2021-06-05 05:05:55,330 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 2230 transitions. Word has length 29 [2021-06-05 05:05:55,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:55,330 INFO L482 AbstractCegarLoop]: Abstraction has 936 states and 2230 transitions. [2021-06-05 05:05:55,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:55,331 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 2230 transitions. [2021-06-05 05:05:55,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:05:55,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:55,332 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:55,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 05:05:55,532 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:55,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:55,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1145171940, now seen corresponding path program 58 times [2021-06-05 05:05:55,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:55,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179252849] [2021-06-05 05:05:55,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:55,722 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:55,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:55,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179252849] [2021-06-05 05:05:55,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179252849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:55,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496178194] [2021-06-05 05:05:55,722 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:55,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:05:55,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:55,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:05:55,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:55,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:05:55,900 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 25 treesize of output 13 [2021-06-05 05:05:55,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:55,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:55,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:55,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:05:55,938 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:55,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496178194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:55,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:55,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 05:05:55,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991744604] [2021-06-05 05:05:55,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:05:55,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:55,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:05:55,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:05:55,939 INFO L87 Difference]: Start difference. First operand 936 states and 2230 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:56,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:56,913 INFO L93 Difference]: Finished difference Result 2285 states and 5602 transitions. [2021-06-05 05:05:56,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:05:56,914 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) 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 29 [2021-06-05 05:05:56,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:56,916 INFO L225 Difference]: With dead ends: 2285 [2021-06-05 05:05:56,916 INFO L226 Difference]: Without dead ends: 2267 [2021-06-05 05:05:56,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 719.9ms TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:05:56,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2267 states. [2021-06-05 05:05:56,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2267 to 905. [2021-06-05 05:05:56,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 2.377212389380531) internal successors, (2149), 904 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:56,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 2149 transitions. [2021-06-05 05:05:56,927 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 2149 transitions. Word has length 29 [2021-06-05 05:05:56,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:56,927 INFO L482 AbstractCegarLoop]: Abstraction has 905 states and 2149 transitions. [2021-06-05 05:05:56,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:56,927 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 2149 transitions. [2021-06-05 05:05:56,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:05:56,928 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:56,928 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:57,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 05:05:57,133 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:57,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:57,134 INFO L82 PathProgramCache]: Analyzing trace with hash -681846126, now seen corresponding path program 59 times [2021-06-05 05:05:57,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:57,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432154503] [2021-06-05 05:05:57,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:57,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:57,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:57,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:57,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432154503] [2021-06-05 05:05:57,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432154503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:57,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754751798] [2021-06-05 05:05:57,324 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:57,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:05:57,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:57,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:05:57,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:57,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 05:05:57,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:57,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:57,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:57,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 05:05:57,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:57,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754751798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:57,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:57,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 05:05:57,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533511536] [2021-06-05 05:05:57,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:05:57,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:57,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:05:57,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:05:57,546 INFO L87 Difference]: Start difference. First operand 905 states and 2149 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:58,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:58,391 INFO L93 Difference]: Finished difference Result 2101 states and 5115 transitions. [2021-06-05 05:05:58,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:05:58,392 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:05:58,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:58,393 INFO L225 Difference]: With dead ends: 2101 [2021-06-05 05:05:58,393 INFO L226 Difference]: Without dead ends: 2092 [2021-06-05 05:05:58,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 605.0ms TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:05:58,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-06-05 05:05:58,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 902. [2021-06-05 05:05:58,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 2.3773584905660377) internal successors, (2142), 901 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:58,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 2142 transitions. [2021-06-05 05:05:58,404 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 2142 transitions. Word has length 29 [2021-06-05 05:05:58,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:58,405 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 2142 transitions. [2021-06-05 05:05:58,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:58,405 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 2142 transitions. [2021-06-05 05:05:58,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:05:58,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:58,406 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:58,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 05:05:58,621 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:58,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:58,621 INFO L82 PathProgramCache]: Analyzing trace with hash -2034498886, now seen corresponding path program 60 times [2021-06-05 05:05:58,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:58,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284961473] [2021-06-05 05:05:58,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:58,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:58,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:58,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284961473] [2021-06-05 05:05:58,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284961473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:58,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612373188] [2021-06-05 05:05:58,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:58,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:05:58,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:58,854 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:05:58,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:59,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:05:59,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:59,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 33 [2021-06-05 05:05:59,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:05:59,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:59,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:59,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:52 [2021-06-05 05:05:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:59,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612373188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:59,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:59,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:05:59,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171470112] [2021-06-05 05:05:59,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:05:59,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:59,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:05:59,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:05:59,158 INFO L87 Difference]: Start difference. First operand 902 states and 2142 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:00,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:00,832 INFO L93 Difference]: Finished difference Result 2312 states and 5639 transitions. [2021-06-05 05:06:00,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:06:00,832 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:06:00,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:00,834 INFO L225 Difference]: With dead ends: 2312 [2021-06-05 05:06:00,834 INFO L226 Difference]: Without dead ends: 2297 [2021-06-05 05:06:00,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 1494.2ms TimeCoverageRelationStatistics Valid=404, Invalid=1758, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:06:00,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2021-06-05 05:06:00,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 919. [2021-06-05 05:06:00,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 2.3823529411764706) internal successors, (2187), 918 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:00,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2187 transitions. [2021-06-05 05:06:00,845 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2187 transitions. Word has length 29 [2021-06-05 05:06:00,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:00,845 INFO L482 AbstractCegarLoop]: Abstraction has 919 states and 2187 transitions. [2021-06-05 05:06:00,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:00,845 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2187 transitions. [2021-06-05 05:06:00,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:06:00,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:00,846 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:01,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 05:06:01,047 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:01,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:01,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1760827148, now seen corresponding path program 61 times [2021-06-05 05:06:01,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:01,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922834329] [2021-06-05 05:06:01,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:01,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:01,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:01,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922834329] [2021-06-05 05:06:01,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922834329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:01,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153258214] [2021-06-05 05:06:01,289 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:01,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:06:01,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:01,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:06:01,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:06:01,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:01,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:01,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:01,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:06:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:01,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153258214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:01,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:01,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 05:06:01,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308212677] [2021-06-05 05:06:01,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:06:01,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:01,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:06:01,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:06:01,518 INFO L87 Difference]: Start difference. First operand 919 states and 2187 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:03,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:03,128 INFO L93 Difference]: Finished difference Result 2639 states and 6483 transitions. [2021-06-05 05:06:03,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:06:03,128 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:06:03,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:03,131 INFO L225 Difference]: With dead ends: 2639 [2021-06-05 05:06:03,131 INFO L226 Difference]: Without dead ends: 2624 [2021-06-05 05:06:03,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1237.2ms TimeCoverageRelationStatistics Valid=428, Invalid=1734, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:06:03,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2624 states. [2021-06-05 05:06:03,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2624 to 952. [2021-06-05 05:06:03,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 951 states have (on average 2.3880126182965298) internal successors, (2271), 951 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:03,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 2271 transitions. [2021-06-05 05:06:03,143 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 2271 transitions. Word has length 29 [2021-06-05 05:06:03,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:03,144 INFO L482 AbstractCegarLoop]: Abstraction has 952 states and 2271 transitions. [2021-06-05 05:06:03,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:03,144 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 2271 transitions. [2021-06-05 05:06:03,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:06:03,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:03,145 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:03,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:03,345 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:03,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:03,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1095623980, now seen corresponding path program 62 times [2021-06-05 05:06:03,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:03,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205688294] [2021-06-05 05:06:03,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:03,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:03,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:03,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:03,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205688294] [2021-06-05 05:06:03,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205688294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:03,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689431854] [2021-06-05 05:06:03,566 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:03,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:06:03,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:03,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:06:03,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:03,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:06:03,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:06:03,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:03,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:06:03,750 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:03,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689431854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:03,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:03,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 05:06:03,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635640465] [2021-06-05 05:06:03,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:06:03,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:03,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:06:03,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:06:03,751 INFO L87 Difference]: Start difference. First operand 952 states and 2271 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:04,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:04,771 INFO L93 Difference]: Finished difference Result 2233 states and 5482 transitions. [2021-06-05 05:06:04,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:06:04,771 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) 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 29 [2021-06-05 05:06:04,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:04,773 INFO L225 Difference]: With dead ends: 2233 [2021-06-05 05:06:04,773 INFO L226 Difference]: Without dead ends: 2214 [2021-06-05 05:06:04,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 773.2ms TimeCoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:06:04,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-06-05 05:06:04,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 931. [2021-06-05 05:06:04,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 2.3849462365591396) internal successors, (2218), 930 states have internal predecessors, (2218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:04,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 2218 transitions. [2021-06-05 05:06:04,784 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 2218 transitions. Word has length 29 [2021-06-05 05:06:04,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:04,784 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 2218 transitions. [2021-06-05 05:06:04,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:04,784 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 2218 transitions. [2021-06-05 05:06:04,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:06:04,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:04,785 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:04,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:04,986 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:04,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:04,986 INFO L82 PathProgramCache]: Analyzing trace with hash -195203804, now seen corresponding path program 63 times [2021-06-05 05:06:04,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:04,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331672594] [2021-06-05 05:06:04,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:04,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:05,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:05,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:05,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331672594] [2021-06-05 05:06:05,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331672594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:05,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358426461] [2021-06-05 05:06:05,205 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:05,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:06:05,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:05,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:06:05,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:05,378 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 19 treesize of output 11 [2021-06-05 05:06:05,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:05,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:05,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:05,383 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-06-05 05:06:05,418 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:05,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358426461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:05,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:05,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 05:06:05,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065397570] [2021-06-05 05:06:05,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:06:05,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:05,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:06:05,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:06:05,419 INFO L87 Difference]: Start difference. First operand 931 states and 2218 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:06,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:06,896 INFO L93 Difference]: Finished difference Result 2734 states and 6808 transitions. [2021-06-05 05:06:06,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:06:06,897 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 29 [2021-06-05 05:06:06,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:06,899 INFO L225 Difference]: With dead ends: 2734 [2021-06-05 05:06:06,899 INFO L226 Difference]: Without dead ends: 2721 [2021-06-05 05:06:06,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1139.4ms TimeCoverageRelationStatistics Valid=354, Invalid=1452, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:06:06,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2021-06-05 05:06:06,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 952. [2021-06-05 05:06:06,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 951 states have (on average 2.3880126182965298) internal successors, (2271), 951 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:06,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 2271 transitions. [2021-06-05 05:06:06,912 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 2271 transitions. Word has length 29 [2021-06-05 05:06:06,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:06,912 INFO L482 AbstractCegarLoop]: Abstraction has 952 states and 2271 transitions. [2021-06-05 05:06:06,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:06,912 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 2271 transitions. [2021-06-05 05:06:06,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:06:06,913 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:06,913 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:07,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 05:06:07,113 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:07,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:07,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1561197246, now seen corresponding path program 64 times [2021-06-05 05:06:07,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:07,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749854519] [2021-06-05 05:06:07,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:07,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:07,311 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:07,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:07,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749854519] [2021-06-05 05:06:07,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749854519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:07,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107154715] [2021-06-05 05:06:07,311 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:07,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:06:07,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:07,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:06:07,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:07,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:06:07,464 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 25 treesize of output 13 [2021-06-05 05:06:07,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:07,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:07,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:07,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:06:07,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:07,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107154715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:07,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:07,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 05:06:07,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727605937] [2021-06-05 05:06:07,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:06:07,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:07,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:06:07,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:06:07,499 INFO L87 Difference]: Start difference. First operand 952 states and 2271 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:08,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:08,898 INFO L93 Difference]: Finished difference Result 2449 states and 6065 transitions. [2021-06-05 05:06:08,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:06:08,898 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 29 [2021-06-05 05:06:08,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:08,900 INFO L225 Difference]: With dead ends: 2449 [2021-06-05 05:06:08,900 INFO L226 Difference]: Without dead ends: 2432 [2021-06-05 05:06:08,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1091.1ms TimeCoverageRelationStatistics Valid=308, Invalid=1414, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:06:08,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2021-06-05 05:06:08,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 940. [2021-06-05 05:06:08,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 2.3876464323748667) internal successors, (2242), 939 states have internal predecessors, (2242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:08,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 2242 transitions. [2021-06-05 05:06:08,912 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 2242 transitions. Word has length 29 [2021-06-05 05:06:08,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:08,912 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 2242 transitions. [2021-06-05 05:06:08,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:08,912 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 2242 transitions. [2021-06-05 05:06:08,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:06:08,913 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:08,913 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:09,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 05:06:09,113 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:09,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:09,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1204815982, now seen corresponding path program 65 times [2021-06-05 05:06:09,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:09,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182785595] [2021-06-05 05:06:09,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:09,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:09,311 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:09,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:09,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182785595] [2021-06-05 05:06:09,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182785595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:09,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962328606] [2021-06-05 05:06:09,311 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:09,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:06:09,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:09,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:06:09,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:09,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 05:06:09,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:09,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:09,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:09,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 05:06:09,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:09,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962328606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:09,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:09,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-05 05:06:09,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969514272] [2021-06-05 05:06:09,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:06:09,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:09,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:06:09,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:06:09,536 INFO L87 Difference]: Start difference. First operand 940 states and 2242 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:10,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:10,767 INFO L93 Difference]: Finished difference Result 2213 states and 5429 transitions. [2021-06-05 05:06:10,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:06:10,767 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) 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 29 [2021-06-05 05:06:10,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:10,769 INFO L225 Difference]: With dead ends: 2213 [2021-06-05 05:06:10,769 INFO L226 Difference]: Without dead ends: 2203 [2021-06-05 05:06:10,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 839.0ms TimeCoverageRelationStatistics Valid=204, Invalid=1202, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:06:10,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2203 states. [2021-06-05 05:06:10,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2203 to 925. [2021-06-05 05:06:10,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 2.382034632034632) internal successors, (2201), 924 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:10,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 2201 transitions. [2021-06-05 05:06:10,780 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 2201 transitions. Word has length 29 [2021-06-05 05:06:10,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:10,780 INFO L482 AbstractCegarLoop]: Abstraction has 925 states and 2201 transitions. [2021-06-05 05:06:10,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:10,780 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 2201 transitions. [2021-06-05 05:06:10,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:06:10,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:10,781 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:10,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 05:06:10,982 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:10,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:10,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1872493656, now seen corresponding path program 66 times [2021-06-05 05:06:10,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:10,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919504503] [2021-06-05 05:06:10,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:11,174 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:11,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:11,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919504503] [2021-06-05 05:06:11,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919504503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:11,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057673708] [2021-06-05 05:06:11,175 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:11,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:06:11,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:11,196 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:06:11,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:11,390 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:11,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 05:06:11,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:06:11,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:11,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:11,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-05 05:06:11,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:11,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057673708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:11,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:11,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:06:11,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141052942] [2021-06-05 05:06:11,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:06:11,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:11,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:06:11,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:06:11,493 INFO L87 Difference]: Start difference. First operand 925 states and 2201 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:13,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:13,095 INFO L93 Difference]: Finished difference Result 2397 states and 5827 transitions. [2021-06-05 05:06:13,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:06:13,095 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:06:13,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:13,097 INFO L225 Difference]: With dead ends: 2397 [2021-06-05 05:06:13,097 INFO L226 Difference]: Without dead ends: 2382 [2021-06-05 05:06:13,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1326.5ms TimeCoverageRelationStatistics Valid=406, Invalid=1574, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:06:13,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2021-06-05 05:06:13,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 943. [2021-06-05 05:06:13,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 942 states have (on average 2.386411889596603) internal successors, (2248), 942 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:13,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 2248 transitions. [2021-06-05 05:06:13,109 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 2248 transitions. Word has length 29 [2021-06-05 05:06:13,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:13,109 INFO L482 AbstractCegarLoop]: Abstraction has 943 states and 2248 transitions. [2021-06-05 05:06:13,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:13,109 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 2248 transitions. [2021-06-05 05:06:13,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:06:13,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:13,110 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:13,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 05:06:13,310 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:13,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:13,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1598821918, now seen corresponding path program 67 times [2021-06-05 05:06:13,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:13,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218436501] [2021-06-05 05:06:13,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:13,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:13,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:13,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:13,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218436501] [2021-06-05 05:06:13,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218436501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:13,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602478083] [2021-06-05 05:06:13,533 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:13,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:06:13,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:13,700 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 19 treesize of output 11 [2021-06-05 05:06:13,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:13,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:13,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:13,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-06-05 05:06:13,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:13,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602478083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:13,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:13,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 05:06:13,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400651951] [2021-06-05 05:06:13,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:06:13,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:13,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:06:13,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:06:13,748 INFO L87 Difference]: Start difference. First operand 943 states and 2248 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:14,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:14,986 INFO L93 Difference]: Finished difference Result 2737 states and 6714 transitions. [2021-06-05 05:06:14,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:06:14,987 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:06:14,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:14,989 INFO L225 Difference]: With dead ends: 2737 [2021-06-05 05:06:14,989 INFO L226 Difference]: Without dead ends: 2724 [2021-06-05 05:06:14,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1032.9ms TimeCoverageRelationStatistics Valid=379, Invalid=1427, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:06:14,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2021-06-05 05:06:15,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 977. [2021-06-05 05:06:15,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 976 states have (on average 2.394467213114754) internal successors, (2337), 976 states have internal predecessors, (2337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:15,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 2337 transitions. [2021-06-05 05:06:15,001 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 2337 transitions. Word has length 29 [2021-06-05 05:06:15,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:15,002 INFO L482 AbstractCegarLoop]: Abstraction has 977 states and 2337 transitions. [2021-06-05 05:06:15,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:15,002 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 2337 transitions. [2021-06-05 05:06:15,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:06:15,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:15,003 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:15,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:15,203 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:15,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:15,203 INFO L82 PathProgramCache]: Analyzing trace with hash -933618750, now seen corresponding path program 68 times [2021-06-05 05:06:15,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:15,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582250012] [2021-06-05 05:06:15,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:15,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:15,394 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:15,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:15,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582250012] [2021-06-05 05:06:15,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582250012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:15,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703401829] [2021-06-05 05:06:15,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:15,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:06:15,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:15,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:06:15,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:15,553 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 19 treesize of output 11 [2021-06-05 05:06:15,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:15,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:15,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:15,562 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-06-05 05:06:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:15,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703401829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:15,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:15,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 05:06:15,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995098672] [2021-06-05 05:06:15,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:06:15,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:15,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:06:15,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:06:15,592 INFO L87 Difference]: Start difference. First operand 977 states and 2337 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:16,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:16,520 INFO L93 Difference]: Finished difference Result 2328 states and 5723 transitions. [2021-06-05 05:06:16,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:06:16,521 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) 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 29 [2021-06-05 05:06:16,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:16,523 INFO L225 Difference]: With dead ends: 2328 [2021-06-05 05:06:16,523 INFO L226 Difference]: Without dead ends: 2310 [2021-06-05 05:06:16,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 739.4ms TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:06:16,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-06-05 05:06:16,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 937. [2021-06-05 05:06:16,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 2.3846153846153846) internal successors, (2232), 936 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:16,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 2232 transitions. [2021-06-05 05:06:16,534 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 2232 transitions. Word has length 29 [2021-06-05 05:06:16,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:16,534 INFO L482 AbstractCegarLoop]: Abstraction has 937 states and 2232 transitions. [2021-06-05 05:06:16,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:16,534 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 2232 transitions. [2021-06-05 05:06:16,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:06:16,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:16,535 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:16,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-06-05 05:06:16,736 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:16,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:16,736 INFO L82 PathProgramCache]: Analyzing trace with hash 2110585336, now seen corresponding path program 69 times [2021-06-05 05:06:16,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:16,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963072599] [2021-06-05 05:06:16,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:16,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:16,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:16,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963072599] [2021-06-05 05:06:16,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963072599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:16,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453472313] [2021-06-05 05:06:16,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:16,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:06:16,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:16,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:06:16,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:17,112 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 19 treesize of output 11 [2021-06-05 05:06:17,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:17,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:17,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:17,115 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 05:06:17,141 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:17,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453472313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:17,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:17,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 05:06:17,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910051273] [2021-06-05 05:06:17,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:06:17,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:17,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:06:17,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:06:17,142 INFO L87 Difference]: Start difference. First operand 937 states and 2232 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:18,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:18,048 INFO L93 Difference]: Finished difference Result 2170 states and 5288 transitions. [2021-06-05 05:06:18,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:06:18,048 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:06:18,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:18,051 INFO L225 Difference]: With dead ends: 2170 [2021-06-05 05:06:18,051 INFO L226 Difference]: Without dead ends: 2161 [2021-06-05 05:06:18,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 635.6ms TimeCoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:06:18,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2021-06-05 05:06:18,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 932. [2021-06-05 05:06:18,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 931 states have (on average 2.3845327604726103) internal successors, (2220), 931 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:18,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 2220 transitions. [2021-06-05 05:06:18,062 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 2220 transitions. Word has length 29 [2021-06-05 05:06:18,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:18,062 INFO L482 AbstractCegarLoop]: Abstraction has 932 states and 2220 transitions. [2021-06-05 05:06:18,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:18,062 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 2220 transitions. [2021-06-05 05:06:18,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:06:18,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:18,063 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:18,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 05:06:18,264 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:18,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:18,264 INFO L82 PathProgramCache]: Analyzing trace with hash -479580550, now seen corresponding path program 70 times [2021-06-05 05:06:18,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:18,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314160921] [2021-06-05 05:06:18,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:18,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:18,471 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:18,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:18,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314160921] [2021-06-05 05:06:18,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314160921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:18,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523788073] [2021-06-05 05:06:18,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:18,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:06:18,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:18,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:06:18,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:18,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:06:18,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 05:06:18,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:18,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:18,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:18,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-06-05 05:06:18,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:18,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523788073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:18,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:18,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 05:06:18,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307912132] [2021-06-05 05:06:18,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:06:18,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:18,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:06:18,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:06:18,681 INFO L87 Difference]: Start difference. First operand 932 states and 2220 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:20,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:20,013 INFO L93 Difference]: Finished difference Result 2125 states and 5192 transitions. [2021-06-05 05:06:20,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:06:20,013 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:06:20,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:20,015 INFO L225 Difference]: With dead ends: 2125 [2021-06-05 05:06:20,015 INFO L226 Difference]: Without dead ends: 2107 [2021-06-05 05:06:20,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 959.0ms TimeCoverageRelationStatistics Valid=256, Invalid=1226, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:06:20,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2021-06-05 05:06:20,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 923. [2021-06-05 05:06:20,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 2.3817787418655096) internal successors, (2196), 922 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:20,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 2196 transitions. [2021-06-05 05:06:20,025 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 2196 transitions. Word has length 29 [2021-06-05 05:06:20,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:20,025 INFO L482 AbstractCegarLoop]: Abstraction has 923 states and 2196 transitions. [2021-06-05 05:06:20,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:20,025 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 2196 transitions. [2021-06-05 05:06:20,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:06:20,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:20,026 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:20,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 05:06:20,227 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:20,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:20,227 INFO L82 PathProgramCache]: Analyzing trace with hash -823967964, now seen corresponding path program 71 times [2021-06-05 05:06:20,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:20,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354200897] [2021-06-05 05:06:20,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:20,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:20,420 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:20,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:20,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354200897] [2021-06-05 05:06:20,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354200897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:20,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175319480] [2021-06-05 05:06:20,421 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:20,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:06:20,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:20,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:06:20,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:20,601 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 19 treesize of output 11 [2021-06-05 05:06:20,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:20,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:20,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:20,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 05:06:20,633 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:20,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175319480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:20,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:20,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 05:06:20,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555584002] [2021-06-05 05:06:20,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:06:20,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:20,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:06:20,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:06:20,634 INFO L87 Difference]: Start difference. First operand 923 states and 2196 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:21,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:21,956 INFO L93 Difference]: Finished difference Result 2282 states and 5537 transitions. [2021-06-05 05:06:21,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:06:21,956 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:06:21,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:21,958 INFO L225 Difference]: With dead ends: 2282 [2021-06-05 05:06:21,958 INFO L226 Difference]: Without dead ends: 2264 [2021-06-05 05:06:21,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 964.5ms TimeCoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:06:21,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-06-05 05:06:21,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 902. [2021-06-05 05:06:21,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 2.3773584905660377) internal successors, (2142), 901 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:21,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 2142 transitions. [2021-06-05 05:06:21,969 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 2142 transitions. Word has length 29 [2021-06-05 05:06:21,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:21,969 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 2142 transitions. [2021-06-05 05:06:21,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:21,969 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 2142 transitions. [2021-06-05 05:06:21,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:06:21,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:21,970 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:22,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:22,171 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:22,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:22,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1416027862, now seen corresponding path program 72 times [2021-06-05 05:06:22,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:22,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759371159] [2021-06-05 05:06:22,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:22,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:22,369 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:22,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:22,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759371159] [2021-06-05 05:06:22,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759371159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:22,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680051625] [2021-06-05 05:06:22,369 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:22,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:06:22,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:22,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:06:22,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:22,560 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-06-05 05:06:22,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 62 [2021-06-05 05:06:22,562 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:22,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:22,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:22,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:90, output treesize:9 [2021-06-05 05:06:22,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:22,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680051625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:22,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:22,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-05 05:06:22,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251027245] [2021-06-05 05:06:22,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:06:22,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:22,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:06:22,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:06:22,593 INFO L87 Difference]: Start difference. First operand 902 states and 2142 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:23,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:23,481 INFO L93 Difference]: Finished difference Result 2270 states and 5585 transitions. [2021-06-05 05:06:23,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:06:23,481 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) 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 29 [2021-06-05 05:06:23,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:23,483 INFO L225 Difference]: With dead ends: 2270 [2021-06-05 05:06:23,483 INFO L226 Difference]: Without dead ends: 2261 [2021-06-05 05:06:23,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 639.2ms TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:06:23,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2261 states. [2021-06-05 05:06:23,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2261 to 923. [2021-06-05 05:06:23,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 2.382863340563991) internal successors, (2197), 922 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:23,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 2197 transitions. [2021-06-05 05:06:23,495 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 2197 transitions. Word has length 29 [2021-06-05 05:06:23,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:23,495 INFO L482 AbstractCegarLoop]: Abstraction has 923 states and 2197 transitions. [2021-06-05 05:06:23,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:23,495 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 2197 transitions. [2021-06-05 05:06:23,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:06:23,496 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:23,496 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:23,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 05:06:23,696 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:23,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:23,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1142356124, now seen corresponding path program 73 times [2021-06-05 05:06:23,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:23,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781658038] [2021-06-05 05:06:23,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:23,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:23,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:23,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781658038] [2021-06-05 05:06:23,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781658038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:23,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786616234] [2021-06-05 05:06:23,892 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:23,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:06:23,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:24,026 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 19 treesize of output 11 [2021-06-05 05:06:24,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:24,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:24,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:24,030 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-06-05 05:06:24,058 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:24,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786616234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:24,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:24,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 05:06:24,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552412265] [2021-06-05 05:06:24,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:06:24,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:24,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:06:24,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:06:24,058 INFO L87 Difference]: Start difference. First operand 923 states and 2197 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:24,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:24,769 INFO L93 Difference]: Finished difference Result 2303 states and 5689 transitions. [2021-06-05 05:06:24,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:06:24,770 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 29 [2021-06-05 05:06:24,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:24,772 INFO L225 Difference]: With dead ends: 2303 [2021-06-05 05:06:24,772 INFO L226 Difference]: Without dead ends: 2292 [2021-06-05 05:06:24,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 548.0ms TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:06:24,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2292 states. [2021-06-05 05:06:24,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2292 to 935. [2021-06-05 05:06:24,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 2.3843683083511777) internal successors, (2227), 934 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:24,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 2227 transitions. [2021-06-05 05:06:24,784 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 2227 transitions. Word has length 29 [2021-06-05 05:06:24,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:24,784 INFO L482 AbstractCegarLoop]: Abstraction has 935 states and 2227 transitions. [2021-06-05 05:06:24,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:24,784 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 2227 transitions. [2021-06-05 05:06:24,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:06:24,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:24,785 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:24,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:24,985 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:24,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:24,986 INFO L82 PathProgramCache]: Analyzing trace with hash -477152956, now seen corresponding path program 74 times [2021-06-05 05:06:24,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:24,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830160117] [2021-06-05 05:06:24,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:24,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:25,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:25,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:25,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830160117] [2021-06-05 05:06:25,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830160117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:25,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052232814] [2021-06-05 05:06:25,196 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:25,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:06:25,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:25,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:06:25,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:25,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:06:25,354 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 25 treesize of output 13 [2021-06-05 05:06:25,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:25,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:25,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:25,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:06:25,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:25,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052232814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:25,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:25,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 05:06:25,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95783989] [2021-06-05 05:06:25,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:06:25,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:25,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:06:25,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:06:25,387 INFO L87 Difference]: Start difference. First operand 935 states and 2227 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:26,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:26,025 INFO L93 Difference]: Finished difference Result 2383 states and 5882 transitions. [2021-06-05 05:06:26,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:06:26,025 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 29 [2021-06-05 05:06:26,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:26,027 INFO L225 Difference]: With dead ends: 2383 [2021-06-05 05:06:26,027 INFO L226 Difference]: Without dead ends: 2363 [2021-06-05 05:06:26,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 571.1ms TimeCoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:06:26,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2021-06-05 05:06:26,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 914. [2021-06-05 05:06:26,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 913 states have (on average 2.380065717415115) internal successors, (2173), 913 states have internal predecessors, (2173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:26,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 2173 transitions. [2021-06-05 05:06:26,038 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 2173 transitions. Word has length 29 [2021-06-05 05:06:26,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:26,039 INFO L482 AbstractCegarLoop]: Abstraction has 914 states and 2173 transitions. [2021-06-05 05:06:26,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:26,039 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 2173 transitions. [2021-06-05 05:06:26,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:06:26,040 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:26,040 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:26,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:26,240 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:26,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:26,240 INFO L82 PathProgramCache]: Analyzing trace with hash 216748502, now seen corresponding path program 75 times [2021-06-05 05:06:26,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:26,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349037912] [2021-06-05 05:06:26,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:26,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:26,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349037912] [2021-06-05 05:06:26,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349037912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:26,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974800637] [2021-06-05 05:06:26,451 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:26,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:06:26,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:26,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:06:26,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:26,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 05:06:26,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:26,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:26,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:26,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-06-05 05:06:26,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:26,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974800637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:26,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:26,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 05:06:26,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745450974] [2021-06-05 05:06:26,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:06:26,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:26,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:06:26,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:06:26,650 INFO L87 Difference]: Start difference. First operand 914 states and 2173 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:27,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:27,989 INFO L93 Difference]: Finished difference Result 2294 states and 5646 transitions. [2021-06-05 05:06:27,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:06:27,990 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) 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 29 [2021-06-05 05:06:27,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:27,992 INFO L225 Difference]: With dead ends: 2294 [2021-06-05 05:06:27,992 INFO L226 Difference]: Without dead ends: 2283 [2021-06-05 05:06:27,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 943.1ms TimeCoverageRelationStatistics Valid=301, Invalid=1259, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:06:27,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2021-06-05 05:06:28,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 935. [2021-06-05 05:06:28,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 2.3843683083511777) internal successors, (2227), 934 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:28,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 2227 transitions. [2021-06-05 05:06:28,003 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 2227 transitions. Word has length 29 [2021-06-05 05:06:28,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:28,003 INFO L482 AbstractCegarLoop]: Abstraction has 935 states and 2227 transitions. [2021-06-05 05:06:28,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:28,003 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 2227 transitions. [2021-06-05 05:06:28,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:06:28,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:28,004 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:28,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 05:06:28,205 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:28,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:28,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1973149552, now seen corresponding path program 76 times [2021-06-05 05:06:28,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:28,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124920917] [2021-06-05 05:06:28,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:28,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:28,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:28,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124920917] [2021-06-05 05:06:28,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124920917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:28,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85508361] [2021-06-05 05:06:28,418 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:28,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:06:28,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:28,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:06:28,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:28,562 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 19 treesize of output 11 [2021-06-05 05:06:28,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:28,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:28,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:28,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-06-05 05:06:28,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:28,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85508361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:28,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:28,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 05:06:28,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936156945] [2021-06-05 05:06:28,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:06:28,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:28,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:06:28,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:06:28,600 INFO L87 Difference]: Start difference. First operand 935 states and 2227 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:29,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:29,770 INFO L93 Difference]: Finished difference Result 2384 states and 5870 transitions. [2021-06-05 05:06:29,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:06:29,770 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) 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 29 [2021-06-05 05:06:29,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:29,772 INFO L225 Difference]: With dead ends: 2384 [2021-06-05 05:06:29,772 INFO L226 Difference]: Without dead ends: 2364 [2021-06-05 05:06:29,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 935.0ms TimeCoverageRelationStatistics Valid=286, Invalid=1274, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:06:29,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2021-06-05 05:06:29,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 923. [2021-06-05 05:06:29,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 2.3817787418655096) internal successors, (2196), 922 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:29,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 2196 transitions. [2021-06-05 05:06:29,784 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 2196 transitions. Word has length 29 [2021-06-05 05:06:29,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:29,784 INFO L482 AbstractCegarLoop]: Abstraction has 923 states and 2196 transitions. [2021-06-05 05:06:29,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:29,784 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 2196 transitions. [2021-06-05 05:06:29,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:06:29,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:29,785 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:29,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:29,989 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:29,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:29,989 INFO L82 PathProgramCache]: Analyzing trace with hash -792863676, now seen corresponding path program 77 times [2021-06-05 05:06:29,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:29,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944372225] [2021-06-05 05:06:29,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:29,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:30,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:30,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944372225] [2021-06-05 05:06:30,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944372225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:30,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566348980] [2021-06-05 05:06:30,207 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:30,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:06:30,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:30,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:06:30,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:30,391 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 19 treesize of output 11 [2021-06-05 05:06:30,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:30,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:30,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:30,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 05:06:30,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:30,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566348980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:30,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:30,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 05:06:30,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606848912] [2021-06-05 05:06:30,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:06:30,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:30,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:06:30,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:06:30,422 INFO L87 Difference]: Start difference. First operand 923 states and 2196 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:31,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:31,898 INFO L93 Difference]: Finished difference Result 2095 states and 5104 transitions. [2021-06-05 05:06:31,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:06:31,898 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:06:31,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:31,900 INFO L225 Difference]: With dead ends: 2095 [2021-06-05 05:06:31,900 INFO L226 Difference]: Without dead ends: 2072 [2021-06-05 05:06:31,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1050.6ms TimeCoverageRelationStatistics Valid=273, Invalid=1533, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:06:31,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-06-05 05:06:31,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 905. [2021-06-05 05:06:31,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 2.377212389380531) internal successors, (2149), 904 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:31,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 2149 transitions. [2021-06-05 05:06:31,910 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 2149 transitions. Word has length 29 [2021-06-05 05:06:31,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:31,910 INFO L482 AbstractCegarLoop]: Abstraction has 905 states and 2149 transitions. [2021-06-05 05:06:31,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:31,910 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 2149 transitions. [2021-06-05 05:06:31,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:06:31,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:31,911 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:32,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:32,117 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:32,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:32,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1290856278, now seen corresponding path program 78 times [2021-06-05 05:06:32,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:32,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559922211] [2021-06-05 05:06:32,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:32,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:32,311 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:32,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:32,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559922211] [2021-06-05 05:06:32,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559922211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:32,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367015730] [2021-06-05 05:06:32,311 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:32,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:06:32,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:32,332 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:06:32,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:32,541 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:32,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 05:06:32,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:06:32,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:32,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:32,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:177 [2021-06-05 05:06:32,741 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-06-05 05:06:32,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:32,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367015730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:32,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:32,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:06:32,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958063057] [2021-06-05 05:06:32,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:06:32,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:32,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:06:32,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:06:32,893 INFO L87 Difference]: Start difference. First operand 905 states and 2149 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:34,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:34,629 INFO L93 Difference]: Finished difference Result 2317 states and 5705 transitions. [2021-06-05 05:06:34,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:06:34,630 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 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 29 [2021-06-05 05:06:34,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:34,631 INFO L225 Difference]: With dead ends: 2317 [2021-06-05 05:06:34,632 INFO L226 Difference]: Without dead ends: 2306 [2021-06-05 05:06:34,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1504.1ms TimeCoverageRelationStatistics Valid=414, Invalid=2136, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:06:34,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2021-06-05 05:06:34,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 945. [2021-06-05 05:06:34,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 944 states have (on average 2.3866525423728815) internal successors, (2253), 944 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:34,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 2253 transitions. [2021-06-05 05:06:34,643 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 2253 transitions. Word has length 29 [2021-06-05 05:06:34,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:34,643 INFO L482 AbstractCegarLoop]: Abstraction has 945 states and 2253 transitions. [2021-06-05 05:06:34,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:34,643 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 2253 transitions. [2021-06-05 05:06:34,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:06:34,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:34,644 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:34,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:34,848 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:34,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:34,849 INFO L82 PathProgramCache]: Analyzing trace with hash 465544772, now seen corresponding path program 79 times [2021-06-05 05:06:34,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:34,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015803762] [2021-06-05 05:06:34,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:34,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:35,023 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:35,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:35,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015803762] [2021-06-05 05:06:35,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015803762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:35,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150860975] [2021-06-05 05:06:35,023 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:35,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:35,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:06:35,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:35,167 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 19 treesize of output 11 [2021-06-05 05:06:35,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:35,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:35,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:35,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-06-05 05:06:35,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:35,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150860975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:35,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:35,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 05:06:35,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101749962] [2021-06-05 05:06:35,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:06:35,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:35,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:06:35,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:06:35,200 INFO L87 Difference]: Start difference. First operand 945 states and 2253 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:36,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:36,104 INFO L93 Difference]: Finished difference Result 2554 states and 6271 transitions. [2021-06-05 05:06:36,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:06:36,104 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) 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 29 [2021-06-05 05:06:36,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:36,106 INFO L225 Difference]: With dead ends: 2554 [2021-06-05 05:06:36,106 INFO L226 Difference]: Without dead ends: 2534 [2021-06-05 05:06:36,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 753.8ms TimeCoverageRelationStatistics Valid=267, Invalid=1139, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:06:36,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-06-05 05:06:36,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 935. [2021-06-05 05:06:36,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 2.380085653104925) internal successors, (2223), 934 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:36,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 2223 transitions. [2021-06-05 05:06:36,118 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 2223 transitions. Word has length 29 [2021-06-05 05:06:36,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:36,118 INFO L482 AbstractCegarLoop]: Abstraction has 935 states and 2223 transitions. [2021-06-05 05:06:36,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:36,118 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 2223 transitions. [2021-06-05 05:06:36,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:06:36,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:36,119 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:36,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:36,320 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:36,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:36,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1105795140, now seen corresponding path program 80 times [2021-06-05 05:06:36,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:36,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899493773] [2021-06-05 05:06:36,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:36,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:36,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:36,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899493773] [2021-06-05 05:06:36,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899493773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:36,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887155710] [2021-06-05 05:06:36,499 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:36,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:06:36,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:36,531 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:06:36,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:36,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:06:36,755 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:36,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 31 [2021-06-05 05:06:36,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:06:36,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:36,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:36,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:69 [2021-06-05 05:06:36,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:36,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887155710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:36,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:36,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 05:06:36,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072592759] [2021-06-05 05:06:36,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:06:36,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:36,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:06:36,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:06:36,907 INFO L87 Difference]: Start difference. First operand 935 states and 2223 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:38,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:38,617 INFO L93 Difference]: Finished difference Result 2321 states and 5636 transitions. [2021-06-05 05:06:38,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:06:38,618 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 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 29 [2021-06-05 05:06:38,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:38,620 INFO L225 Difference]: With dead ends: 2321 [2021-06-05 05:06:38,620 INFO L226 Difference]: Without dead ends: 2301 [2021-06-05 05:06:38,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 1149.1ms TimeCoverageRelationStatistics Valid=283, Invalid=1439, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:06:38,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-06-05 05:06:38,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 920. [2021-06-05 05:06:38,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 2.3754080522306857) internal successors, (2183), 919 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:38,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 2183 transitions. [2021-06-05 05:06:38,631 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 2183 transitions. Word has length 29 [2021-06-05 05:06:38,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:38,631 INFO L482 AbstractCegarLoop]: Abstraction has 920 states and 2183 transitions. [2021-06-05 05:06:38,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:38,631 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 2183 transitions. [2021-06-05 05:06:38,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:06:38,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:38,632 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:38,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 05:06:38,832 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:38,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:38,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1875927132, now seen corresponding path program 81 times [2021-06-05 05:06:38,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:38,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373025042] [2021-06-05 05:06:38,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:38,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:39,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:39,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:39,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373025042] [2021-06-05 05:06:39,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373025042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:39,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767792113] [2021-06-05 05:06:39,010 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:39,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:06:39,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:39,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:06:39,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:39,203 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 19 treesize of output 11 [2021-06-05 05:06:39,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:39,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:39,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:39,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 05:06:39,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:39,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767792113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:39,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:39,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 05:06:39,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476154783] [2021-06-05 05:06:39,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:06:39,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:39,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:06:39,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:06:39,234 INFO L87 Difference]: Start difference. First operand 920 states and 2183 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:40,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:40,264 INFO L93 Difference]: Finished difference Result 2100 states and 5101 transitions. [2021-06-05 05:06:40,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:06:40,264 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:06:40,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:40,266 INFO L225 Difference]: With dead ends: 2100 [2021-06-05 05:06:40,266 INFO L226 Difference]: Without dead ends: 2090 [2021-06-05 05:06:40,266 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 708.0ms TimeCoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:06:40,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2021-06-05 05:06:40,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 914. [2021-06-05 05:06:40,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 913 states have (on average 2.375684556407448) internal successors, (2169), 913 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:40,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 2169 transitions. [2021-06-05 05:06:40,276 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 2169 transitions. Word has length 29 [2021-06-05 05:06:40,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:40,276 INFO L482 AbstractCegarLoop]: Abstraction has 914 states and 2169 transitions. [2021-06-05 05:06:40,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:40,276 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 2169 transitions. [2021-06-05 05:06:40,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:06:40,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:40,277 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:40,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:40,477 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:40,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:40,477 INFO L82 PathProgramCache]: Analyzing trace with hash 48077248, now seen corresponding path program 82 times [2021-06-05 05:06:40,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:40,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830480480] [2021-06-05 05:06:40,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:40,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:40,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:40,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:40,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830480480] [2021-06-05 05:06:40,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830480480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:40,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892546006] [2021-06-05 05:06:40,691 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:40,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:06:40,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:40,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:06:40,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:40,874 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 19 treesize of output 11 [2021-06-05 05:06:40,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:40,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:40,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 05:06:40,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:40,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892546006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:40,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:40,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 05:06:40,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599359444] [2021-06-05 05:06:40,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:06:40,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:40,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:06:40,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:06:40,905 INFO L87 Difference]: Start difference. First operand 914 states and 2169 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:42,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:42,096 INFO L93 Difference]: Finished difference Result 2106 states and 5144 transitions. [2021-06-05 05:06:42,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:06:42,096 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:06:42,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:42,098 INFO L225 Difference]: With dead ends: 2106 [2021-06-05 05:06:42,098 INFO L226 Difference]: Without dead ends: 2089 [2021-06-05 05:06:42,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 926.8ms TimeCoverageRelationStatistics Valid=244, Invalid=1238, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:06:42,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-06-05 05:06:42,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 931. [2021-06-05 05:06:42,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 2.3806451612903228) internal successors, (2214), 930 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:42,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 2214 transitions. [2021-06-05 05:06:42,108 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 2214 transitions. Word has length 29 [2021-06-05 05:06:42,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:42,108 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 2214 transitions. [2021-06-05 05:06:42,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:42,109 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 2214 transitions. [2021-06-05 05:06:42,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:06:42,109 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:42,109 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:42,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-06-05 05:06:42,310 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:42,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:42,310 INFO L82 PathProgramCache]: Analyzing trace with hash 321748986, now seen corresponding path program 83 times [2021-06-05 05:06:42,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:42,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712363810] [2021-06-05 05:06:42,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:42,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:42,529 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:42,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:42,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712363810] [2021-06-05 05:06:42,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712363810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:42,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945333497] [2021-06-05 05:06:42,529 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:42,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:06:42,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:42,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:06:42,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:42,669 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 19 treesize of output 11 [2021-06-05 05:06:42,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:42,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:42,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:42,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-06-05 05:06:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:42,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945333497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:42,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:42,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 05:06:42,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989563078] [2021-06-05 05:06:42,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:06:42,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:42,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:06:42,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:06:42,714 INFO L87 Difference]: Start difference. First operand 931 states and 2214 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:44,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:44,185 INFO L93 Difference]: Finished difference Result 2627 states and 6455 transitions. [2021-06-05 05:06:44,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:06:44,185 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:06:44,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:44,188 INFO L225 Difference]: With dead ends: 2627 [2021-06-05 05:06:44,188 INFO L226 Difference]: Without dead ends: 2612 [2021-06-05 05:06:44,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1173.7ms TimeCoverageRelationStatistics Valid=445, Invalid=1811, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:06:44,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2612 states. [2021-06-05 05:06:44,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2612 to 940. [2021-06-05 05:06:44,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 2.382321618743344) internal successors, (2237), 939 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:44,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 2237 transitions. [2021-06-05 05:06:44,200 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 2237 transitions. Word has length 29 [2021-06-05 05:06:44,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:44,200 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 2237 transitions. [2021-06-05 05:06:44,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:44,200 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 2237 transitions. [2021-06-05 05:06:44,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:06:44,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:44,201 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:44,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 05:06:44,401 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:44,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:44,402 INFO L82 PathProgramCache]: Analyzing trace with hash 986952154, now seen corresponding path program 84 times [2021-06-05 05:06:44,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:44,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411946793] [2021-06-05 05:06:44,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:44,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:44,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:44,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:44,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411946793] [2021-06-05 05:06:44,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411946793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:44,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980110457] [2021-06-05 05:06:44,623 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:44,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:06:44,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:44,644 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:06:44,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:44,755 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 19 treesize of output 11 [2021-06-05 05:06:44,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:44,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:44,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:44,760 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-06-05 05:06:44,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:44,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980110457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:44,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:44,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 05:06:44,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314272063] [2021-06-05 05:06:44,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:06:44,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:44,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:06:44,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:06:44,789 INFO L87 Difference]: Start difference. First operand 940 states and 2237 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:45,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:45,782 INFO L93 Difference]: Finished difference Result 2245 states and 5511 transitions. [2021-06-05 05:06:45,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:06:45,782 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) 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 29 [2021-06-05 05:06:45,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:45,784 INFO L225 Difference]: With dead ends: 2245 [2021-06-05 05:06:45,784 INFO L226 Difference]: Without dead ends: 2226 [2021-06-05 05:06:45,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 795.0ms TimeCoverageRelationStatistics Valid=263, Invalid=1069, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:06:45,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-06-05 05:06:45,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 922. [2021-06-05 05:06:45,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 2.3789359391965257) internal successors, (2191), 921 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:45,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 2191 transitions. [2021-06-05 05:06:45,795 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 2191 transitions. Word has length 29 [2021-06-05 05:06:45,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:45,795 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 2191 transitions. [2021-06-05 05:06:45,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:45,795 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 2191 transitions. [2021-06-05 05:06:45,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:06:45,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:45,796 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:46,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 05:06:46,001 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:46,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:46,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1887372330, now seen corresponding path program 85 times [2021-06-05 05:06:46,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:46,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218777525] [2021-06-05 05:06:46,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:46,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:46,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:46,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:46,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218777525] [2021-06-05 05:06:46,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218777525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:46,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79190191] [2021-06-05 05:06:46,216 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:46,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:46,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:06:46,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:46,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 05:06:46,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:46,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:46,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:46,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:10 [2021-06-05 05:06:46,396 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:46,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79190191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:46,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:46,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 05:06:46,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414060815] [2021-06-05 05:06:46,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:06:46,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:46,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:06:46,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:06:46,397 INFO L87 Difference]: Start difference. First operand 922 states and 2191 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:47,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:47,596 INFO L93 Difference]: Finished difference Result 2745 states and 6830 transitions. [2021-06-05 05:06:47,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:06:47,597 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 29 [2021-06-05 05:06:47,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:47,600 INFO L225 Difference]: With dead ends: 2745 [2021-06-05 05:06:47,600 INFO L226 Difference]: Without dead ends: 2732 [2021-06-05 05:06:47,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1012.5ms TimeCoverageRelationStatistics Valid=318, Invalid=1242, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:06:47,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2021-06-05 05:06:47,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 935. [2021-06-05 05:06:47,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 2.3832976445396143) internal successors, (2226), 934 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:47,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 2226 transitions. [2021-06-05 05:06:47,612 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 2226 transitions. Word has length 29 [2021-06-05 05:06:47,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:47,612 INFO L482 AbstractCegarLoop]: Abstraction has 935 states and 2226 transitions. [2021-06-05 05:06:47,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:47,613 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 2226 transitions. [2021-06-05 05:06:47,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:06:47,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:47,613 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:47,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 05:06:47,814 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:47,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:47,814 INFO L82 PathProgramCache]: Analyzing trace with hash -651193916, now seen corresponding path program 86 times [2021-06-05 05:06:47,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:47,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803102982] [2021-06-05 05:06:47,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:47,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:48,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:48,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:48,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803102982] [2021-06-05 05:06:48,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803102982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:48,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654286371] [2021-06-05 05:06:48,020 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:48,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:06:48,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:48,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:06:48,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:48,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:06:48,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:06:48,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:48,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:48,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:48,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:06:48,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:48,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654286371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:48,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:48,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 05:06:48,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498197230] [2021-06-05 05:06:48,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:06:48,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:48,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:06:48,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:06:48,215 INFO L87 Difference]: Start difference. First operand 935 states and 2226 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:49,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:49,400 INFO L93 Difference]: Finished difference Result 2456 states and 6089 transitions. [2021-06-05 05:06:49,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:06:49,400 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 29 [2021-06-05 05:06:49,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:49,402 INFO L225 Difference]: With dead ends: 2456 [2021-06-05 05:06:49,403 INFO L226 Difference]: Without dead ends: 2439 [2021-06-05 05:06:49,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 990.9ms TimeCoverageRelationStatistics Valid=294, Invalid=1188, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:06:49,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2439 states. [2021-06-05 05:06:49,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2439 to 923. [2021-06-05 05:06:49,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 2.382863340563991) internal successors, (2197), 922 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:49,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 2197 transitions. [2021-06-05 05:06:49,415 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 2197 transitions. Word has length 29 [2021-06-05 05:06:49,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:49,415 INFO L482 AbstractCegarLoop]: Abstraction has 923 states and 2197 transitions. [2021-06-05 05:06:49,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:49,415 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 2197 transitions. [2021-06-05 05:06:49,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:06:49,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:49,416 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:49,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 05:06:49,616 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:49,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:49,616 INFO L82 PathProgramCache]: Analyzing trace with hash 877760152, now seen corresponding path program 87 times [2021-06-05 05:06:49,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:49,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876467771] [2021-06-05 05:06:49,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:49,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:49,813 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:49,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:49,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876467771] [2021-06-05 05:06:49,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876467771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:49,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060539271] [2021-06-05 05:06:49,813 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:49,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:06:49,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:49,835 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:06:49,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:50,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:50,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 35 [2021-06-05 05:06:50,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:06:50,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:50,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:50,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:113 [2021-06-05 05:06:50,427 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-06-05 05:06:50,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:50,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060539271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:50,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:50,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 05:06:50,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245673770] [2021-06-05 05:06:50,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:06:50,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:50,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:06:50,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:06:50,458 INFO L87 Difference]: Start difference. First operand 923 states and 2197 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:53,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:53,391 INFO L93 Difference]: Finished difference Result 2289 states and 5600 transitions. [2021-06-05 05:06:53,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:06:53,392 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 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 29 [2021-06-05 05:06:53,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:53,394 INFO L225 Difference]: With dead ends: 2289 [2021-06-05 05:06:53,394 INFO L226 Difference]: Without dead ends: 2276 [2021-06-05 05:06:53,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 2194.0ms TimeCoverageRelationStatistics Valid=409, Invalid=3013, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:06:53,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2021-06-05 05:06:53,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 917. [2021-06-05 05:06:53,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 2.3799126637554586) internal successors, (2180), 916 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:53,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 2180 transitions. [2021-06-05 05:06:53,405 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 2180 transitions. Word has length 29 [2021-06-05 05:06:53,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:53,405 INFO L482 AbstractCegarLoop]: Abstraction has 917 states and 2180 transitions. [2021-06-05 05:06:53,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:53,405 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 2180 transitions. [2021-06-05 05:06:53,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:06:53,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:53,406 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:53,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:53,606 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:53,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:53,607 INFO L82 PathProgramCache]: Analyzing trace with hash 106621528, now seen corresponding path program 88 times [2021-06-05 05:06:53,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:53,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733668327] [2021-06-05 05:06:53,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:53,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:53,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:53,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:53,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733668327] [2021-06-05 05:06:53,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733668327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:53,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190594016] [2021-06-05 05:06:53,774 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:53,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:06:53,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:53,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:06:53,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:53,961 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 19 treesize of output 11 [2021-06-05 05:06:53,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:53,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:53,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:53,966 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 05:06:53,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:53,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190594016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:53,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:53,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-05 05:06:53,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57584180] [2021-06-05 05:06:53,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:06:53,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:53,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:06:53,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:06:53,995 INFO L87 Difference]: Start difference. First operand 917 states and 2180 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:55,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:55,206 INFO L93 Difference]: Finished difference Result 2287 states and 5597 transitions. [2021-06-05 05:06:55,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:06:55,207 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) 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 29 [2021-06-05 05:06:55,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:55,209 INFO L225 Difference]: With dead ends: 2287 [2021-06-05 05:06:55,209 INFO L226 Difference]: Without dead ends: 2277 [2021-06-05 05:06:55,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 827.5ms TimeCoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:06:55,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2021-06-05 05:06:55,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 905. [2021-06-05 05:06:55,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 2.377212389380531) internal successors, (2149), 904 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:55,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 2149 transitions. [2021-06-05 05:06:55,220 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 2149 transitions. Word has length 29 [2021-06-05 05:06:55,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:55,220 INFO L482 AbstractCegarLoop]: Abstraction has 905 states and 2149 transitions. [2021-06-05 05:06:55,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:55,220 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 2149 transitions. [2021-06-05 05:06:55,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:06:55,221 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:55,221 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:55,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:55,421 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:55,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:55,421 INFO L82 PathProgramCache]: Analyzing trace with hash -296310166, now seen corresponding path program 89 times [2021-06-05 05:06:55,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:55,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152797869] [2021-06-05 05:06:55,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:55,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:55,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:55,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:55,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152797869] [2021-06-05 05:06:55,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152797869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:55,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387564456] [2021-06-05 05:06:55,613 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:55,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:06:55,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:55,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:06:55,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:55,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 05:06:55,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:55,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:55,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:55,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 05:06:55,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:55,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387564456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:55,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:55,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 05:06:55,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988716107] [2021-06-05 05:06:55,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:06:55,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:55,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:06:55,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:06:55,805 INFO L87 Difference]: Start difference. First operand 905 states and 2149 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:57,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:57,008 INFO L93 Difference]: Finished difference Result 2286 states and 5555 transitions. [2021-06-05 05:06:57,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:06:57,008 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:06:57,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:57,010 INFO L225 Difference]: With dead ends: 2286 [2021-06-05 05:06:57,010 INFO L226 Difference]: Without dead ends: 2269 [2021-06-05 05:06:57,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 861.2ms TimeCoverageRelationStatistics Valid=266, Invalid=1294, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:06:57,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2021-06-05 05:06:57,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 923. [2021-06-05 05:06:57,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 2.3817787418655096) internal successors, (2196), 922 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:57,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 2196 transitions. [2021-06-05 05:06:57,021 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 2196 transitions. Word has length 29 [2021-06-05 05:06:57,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:57,021 INFO L482 AbstractCegarLoop]: Abstraction has 923 states and 2196 transitions. [2021-06-05 05:06:57,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:57,021 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 2196 transitions. [2021-06-05 05:06:57,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:06:57,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:57,022 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:57,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:57,225 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:57,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:57,225 INFO L82 PathProgramCache]: Analyzing trace with hash -22638428, now seen corresponding path program 90 times [2021-06-05 05:06:57,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:57,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682395401] [2021-06-05 05:06:57,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:57,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:57,429 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:57,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:57,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682395401] [2021-06-05 05:06:57,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682395401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:57,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098022183] [2021-06-05 05:06:57,429 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:57,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:06:57,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:57,451 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:06:57,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:57,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:06:57,589 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 25 treesize of output 13 [2021-06-05 05:06:57,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:57,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:57,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:57,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:06:57,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:57,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098022183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:57,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:57,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 05:06:57,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335018958] [2021-06-05 05:06:57,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:06:57,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:57,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:06:57,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:06:57,636 INFO L87 Difference]: Start difference. First operand 923 states and 2196 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:59,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:59,225 INFO L93 Difference]: Finished difference Result 2745 states and 6751 transitions. [2021-06-05 05:06:59,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:06:59,225 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:06:59,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:59,228 INFO L225 Difference]: With dead ends: 2745 [2021-06-05 05:06:59,228 INFO L226 Difference]: Without dead ends: 2732 [2021-06-05 05:06:59,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1286.8ms TimeCoverageRelationStatistics Valid=470, Invalid=1882, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:06:59,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2021-06-05 05:06:59,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 939. [2021-06-05 05:06:59,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 938 states have (on average 2.384861407249467) internal successors, (2237), 938 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:59,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 2237 transitions. [2021-06-05 05:06:59,240 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 2237 transitions. Word has length 29 [2021-06-05 05:06:59,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:59,240 INFO L482 AbstractCegarLoop]: Abstraction has 939 states and 2237 transitions. [2021-06-05 05:06:59,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:59,240 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 2237 transitions. [2021-06-05 05:06:59,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:06:59,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:59,241 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:59,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:59,442 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:59,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:59,442 INFO L82 PathProgramCache]: Analyzing trace with hash 642564740, now seen corresponding path program 91 times [2021-06-05 05:06:59,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:59,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170404661] [2021-06-05 05:06:59,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:59,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:59,636 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:59,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:59,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170404661] [2021-06-05 05:06:59,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170404661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:59,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997227726] [2021-06-05 05:06:59,636 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:59,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:59,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:06:59,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:59,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:06:59,792 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 25 treesize of output 13 [2021-06-05 05:06:59,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:59,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:59,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:59,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:06:59,825 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:59,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997227726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:59,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:59,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 05:06:59,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941238093] [2021-06-05 05:06:59,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:06:59,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:59,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:06:59,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:06:59,825 INFO L87 Difference]: Start difference. First operand 939 states and 2237 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:00,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:00,809 INFO L93 Difference]: Finished difference Result 2366 states and 5818 transitions. [2021-06-05 05:07:00,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:07:00,810 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) 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 29 [2021-06-05 05:07:00,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:00,811 INFO L225 Difference]: With dead ends: 2366 [2021-06-05 05:07:00,811 INFO L226 Difference]: Without dead ends: 2348 [2021-06-05 05:07:00,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 807.2ms TimeCoverageRelationStatistics Valid=266, Invalid=1066, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:07:00,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-06-05 05:07:00,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 908. [2021-06-05 05:07:00,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 2.377067254685777) internal successors, (2156), 907 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:00,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 2156 transitions. [2021-06-05 05:07:00,822 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 2156 transitions. Word has length 29 [2021-06-05 05:07:00,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:00,822 INFO L482 AbstractCegarLoop]: Abstraction has 908 states and 2156 transitions. [2021-06-05 05:07:00,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:00,823 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 2156 transitions. [2021-06-05 05:07:00,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:07:00,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:00,823 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:01,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:01,025 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:01,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:01,028 INFO L82 PathProgramCache]: Analyzing trace with hash -608198470, now seen corresponding path program 92 times [2021-06-05 05:07:01,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:01,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73586554] [2021-06-05 05:07:01,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:01,203 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:01,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:01,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73586554] [2021-06-05 05:07:01,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73586554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:01,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518465733] [2021-06-05 05:07:01,203 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:01,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:07:01,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:01,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:07:01,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:01,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 05:07:01,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:01,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:01,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:01,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 05:07:01,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:01,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518465733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:01,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:01,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-05 05:07:01,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526240891] [2021-06-05 05:07:01,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:07:01,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:01,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:07:01,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:07:01,407 INFO L87 Difference]: Start difference. First operand 908 states and 2156 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:02,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:02,110 INFO L93 Difference]: Finished difference Result 2096 states and 5106 transitions. [2021-06-05 05:07:02,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:07:02,110 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:07:02,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:02,112 INFO L225 Difference]: With dead ends: 2096 [2021-06-05 05:07:02,112 INFO L226 Difference]: Without dead ends: 2087 [2021-06-05 05:07:02,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 556.2ms TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:07:02,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2087 states. [2021-06-05 05:07:02,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2087 to 901. [2021-06-05 05:07:02,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 2.3777777777777778) internal successors, (2140), 900 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:02,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 2140 transitions. [2021-06-05 05:07:02,122 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 2140 transitions. Word has length 29 [2021-06-05 05:07:02,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:02,122 INFO L482 AbstractCegarLoop]: Abstraction has 901 states and 2140 transitions. [2021-06-05 05:07:02,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:02,122 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 2140 transitions. [2021-06-05 05:07:02,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:07:02,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:02,123 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:02,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:02,323 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:02,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:02,324 INFO L82 PathProgramCache]: Analyzing trace with hash -154214669, now seen corresponding path program 1 times [2021-06-05 05:07:02,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:02,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773624043] [2021-06-05 05:07:02,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:02,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:02,551 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:02,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:02,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773624043] [2021-06-05 05:07:02,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773624043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:02,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197426133] [2021-06-05 05:07:02,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:02,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:02,576 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:07:02,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:02,776 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 05:07:02,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-06-05 05:07:02,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:02,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:02,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:02,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:11 [2021-06-05 05:07:02,799 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:02,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197426133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:02,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:02,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:07:02,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550076209] [2021-06-05 05:07:02,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:07:02,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:02,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:07:02,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:07:02,800 INFO L87 Difference]: Start difference. First operand 901 states and 2140 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:03,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:03,887 INFO L93 Difference]: Finished difference Result 2216 states and 5379 transitions. [2021-06-05 05:07:03,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:07:03,887 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 30 [2021-06-05 05:07:03,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:03,889 INFO L225 Difference]: With dead ends: 2216 [2021-06-05 05:07:03,889 INFO L226 Difference]: Without dead ends: 2206 [2021-06-05 05:07:03,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 659.5ms TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:07:03,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2206 states. [2021-06-05 05:07:03,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2206 to 904. [2021-06-05 05:07:03,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 2.3754152823920265) internal successors, (2145), 903 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:03,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2145 transitions. [2021-06-05 05:07:03,899 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2145 transitions. Word has length 30 [2021-06-05 05:07:03,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:03,899 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2145 transitions. [2021-06-05 05:07:03,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:03,900 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2145 transitions. [2021-06-05 05:07:03,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:07:03,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:03,900 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:04,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-06-05 05:07:04,101 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:04,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:04,101 INFO L82 PathProgramCache]: Analyzing trace with hash 351841351, now seen corresponding path program 2 times [2021-06-05 05:07:04,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:04,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876653778] [2021-06-05 05:07:04,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:04,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:04,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:04,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:04,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876653778] [2021-06-05 05:07:04,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876653778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:04,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009837484] [2021-06-05 05:07:04,326 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:04,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:07:04,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:04,351 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:07:04,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:04,496 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 05:07:04,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-06-05 05:07:04,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:04,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:04,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:04,501 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:14 [2021-06-05 05:07:04,524 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:04,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009837484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:04,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:04,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 05:07:04,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644266988] [2021-06-05 05:07:04,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:07:04,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:04,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:07:04,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:07:04,525 INFO L87 Difference]: Start difference. First operand 904 states and 2145 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:05,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:05,776 INFO L93 Difference]: Finished difference Result 2488 states and 6084 transitions. [2021-06-05 05:07:05,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:07:05,776 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:07:05,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:05,778 INFO L225 Difference]: With dead ends: 2488 [2021-06-05 05:07:05,778 INFO L226 Difference]: Without dead ends: 2477 [2021-06-05 05:07:05,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 810.3ms TimeCoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:07:05,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2477 states. [2021-06-05 05:07:05,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2477 to 943. [2021-06-05 05:07:05,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 942 states have (on average 2.3842887473460723) internal successors, (2246), 942 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:05,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 2246 transitions. [2021-06-05 05:07:05,790 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 2246 transitions. Word has length 30 [2021-06-05 05:07:05,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:05,790 INFO L482 AbstractCegarLoop]: Abstraction has 943 states and 2246 transitions. [2021-06-05 05:07:05,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:05,790 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 2246 transitions. [2021-06-05 05:07:05,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:07:05,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:05,791 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:06,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 05:07:06,006 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:06,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:06,007 INFO L82 PathProgramCache]: Analyzing trace with hash 2108242401, now seen corresponding path program 3 times [2021-06-05 05:07:06,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:06,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979167062] [2021-06-05 05:07:06,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:06,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:06,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:06,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979167062] [2021-06-05 05:07:06,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979167062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:06,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296475980] [2021-06-05 05:07:06,215 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:06,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:07:06,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:06,237 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:07:06,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:06,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:06,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:07:06,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:06,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:06,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:06,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:95 [2021-06-05 05:07:06,728 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-06-05 05:07:06,763 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:06,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296475980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:06,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:06,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-05 05:07:06,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770621004] [2021-06-05 05:07:06,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:07:06,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:06,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:07:06,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:07:06,764 INFO L87 Difference]: Start difference. First operand 943 states and 2246 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:08,339 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-06-05 05:07:08,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:08,772 INFO L93 Difference]: Finished difference Result 2409 states and 5926 transitions. [2021-06-05 05:07:08,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:07:08,773 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 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 30 [2021-06-05 05:07:08,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:08,775 INFO L225 Difference]: With dead ends: 2409 [2021-06-05 05:07:08,775 INFO L226 Difference]: Without dead ends: 2396 [2021-06-05 05:07:08,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1753.4ms TimeCoverageRelationStatistics Valid=486, Invalid=2270, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:07:08,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2396 states. [2021-06-05 05:07:08,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2396 to 939. [2021-06-05 05:07:08,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 938 states have (on average 2.38272921108742) internal successors, (2235), 938 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:08,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 2235 transitions. [2021-06-05 05:07:08,786 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 2235 transitions. Word has length 30 [2021-06-05 05:07:08,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:08,786 INFO L482 AbstractCegarLoop]: Abstraction has 939 states and 2235 transitions. [2021-06-05 05:07:08,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:08,786 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 2235 transitions. [2021-06-05 05:07:08,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:07:08,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:08,787 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:08,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-05 05:07:08,988 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:08,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:08,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1190292211, now seen corresponding path program 4 times [2021-06-05 05:07:08,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:08,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152674353] [2021-06-05 05:07:08,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:08,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:09,205 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:09,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:09,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152674353] [2021-06-05 05:07:09,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152674353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:09,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774324231] [2021-06-05 05:07:09,205 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:09,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:07:09,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:09,226 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:07:09,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:09,386 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 05:07:09,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-06-05 05:07:09,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:09,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:09,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:09,393 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:14 [2021-06-05 05:07:09,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:09,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774324231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:09,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:09,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:07:09,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714924680] [2021-06-05 05:07:09,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:07:09,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:09,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:07:09,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:07:09,430 INFO L87 Difference]: Start difference. First operand 939 states and 2235 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:10,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:10,852 INFO L93 Difference]: Finished difference Result 2854 states and 6989 transitions. [2021-06-05 05:07:10,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:07:10,857 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-06-05 05:07:10,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:10,859 INFO L225 Difference]: With dead ends: 2854 [2021-06-05 05:07:10,860 INFO L226 Difference]: Without dead ends: 2836 [2021-06-05 05:07:10,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1101.9ms TimeCoverageRelationStatistics Valid=419, Invalid=1743, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:07:10,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2836 states. [2021-06-05 05:07:10,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2836 to 927. [2021-06-05 05:07:10,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 926 states have (on average 2.379049676025918) internal successors, (2203), 926 states have internal predecessors, (2203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:10,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 2203 transitions. [2021-06-05 05:07:10,872 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 2203 transitions. Word has length 30 [2021-06-05 05:07:10,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:10,872 INFO L482 AbstractCegarLoop]: Abstraction has 927 states and 2203 transitions. [2021-06-05 05:07:10,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:10,872 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 2203 transitions. [2021-06-05 05:07:10,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:07:10,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:10,873 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:11,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:11,085 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:11,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:11,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1651280687, now seen corresponding path program 5 times [2021-06-05 05:07:11,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:11,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593427043] [2021-06-05 05:07:11,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:11,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:11,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:11,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593427043] [2021-06-05 05:07:11,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593427043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:11,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686466542] [2021-06-05 05:07:11,291 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:11,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:07:11,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:11,312 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:07:11,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:11,475 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 05:07:11,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-06-05 05:07:11,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:11,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:11,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:11,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:11 [2021-06-05 05:07:11,499 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:11,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686466542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:11,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:11,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:07:11,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889201665] [2021-06-05 05:07:11,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:07:11,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:11,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:07:11,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:07:11,500 INFO L87 Difference]: Start difference. First operand 927 states and 2203 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:12,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:12,482 INFO L93 Difference]: Finished difference Result 2280 states and 5518 transitions. [2021-06-05 05:07:12,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:07:12,483 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-06-05 05:07:12,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:12,485 INFO L225 Difference]: With dead ends: 2280 [2021-06-05 05:07:12,485 INFO L226 Difference]: Without dead ends: 2260 [2021-06-05 05:07:12,485 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 719.9ms TimeCoverageRelationStatistics Valid=282, Invalid=1050, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:07:12,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2021-06-05 05:07:12,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 925. [2021-06-05 05:07:12,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 2.378787878787879) internal successors, (2198), 924 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:12,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 2198 transitions. [2021-06-05 05:07:12,496 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 2198 transitions. Word has length 30 [2021-06-05 05:07:12,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:12,496 INFO L482 AbstractCegarLoop]: Abstraction has 925 states and 2198 transitions. [2021-06-05 05:07:12,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:12,496 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 2198 transitions. [2021-06-05 05:07:12,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:07:12,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:12,497 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:12,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 05:07:12,697 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:12,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:12,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1006114153, now seen corresponding path program 6 times [2021-06-05 05:07:12,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:12,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322006267] [2021-06-05 05:07:12,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:12,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:12,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:12,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322006267] [2021-06-05 05:07:12,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322006267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:12,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887869216] [2021-06-05 05:07:12,906 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:12,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:07:12,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:12,937 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:07:12,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:13,079 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 29 treesize of output 17 [2021-06-05 05:07:13,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:13,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:13,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:13,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-05 05:07:13,103 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:13,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887869216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:13,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:13,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:07:13,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232663336] [2021-06-05 05:07:13,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:07:13,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:13,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:07:13,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:07:13,104 INFO L87 Difference]: Start difference. First operand 925 states and 2198 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:14,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:14,256 INFO L93 Difference]: Finished difference Result 2372 states and 5731 transitions. [2021-06-05 05:07:14,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:07:14,257 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-06-05 05:07:14,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:14,263 INFO L225 Difference]: With dead ends: 2372 [2021-06-05 05:07:14,263 INFO L226 Difference]: Without dead ends: 2335 [2021-06-05 05:07:14,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 745.0ms TimeCoverageRelationStatistics Valid=268, Invalid=992, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:07:14,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-06-05 05:07:14,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 919. [2021-06-05 05:07:14,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 2.377995642701525) internal successors, (2183), 918 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:14,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2183 transitions. [2021-06-05 05:07:14,277 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2183 transitions. Word has length 30 [2021-06-05 05:07:14,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:14,277 INFO L482 AbstractCegarLoop]: Abstraction has 919 states and 2183 transitions. [2021-06-05 05:07:14,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:14,277 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2183 transitions. [2021-06-05 05:07:14,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:07:14,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:14,278 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:14,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 05:07:14,497 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:14,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:14,497 INFO L82 PathProgramCache]: Analyzing trace with hash -627290201, now seen corresponding path program 7 times [2021-06-05 05:07:14,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:14,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800924732] [2021-06-05 05:07:14,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:14,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:14,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:14,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:14,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800924732] [2021-06-05 05:07:14,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800924732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:14,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643002828] [2021-06-05 05:07:14,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:14,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:14,729 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:07:14,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:14,898 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 05:07:14,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-06-05 05:07:14,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:14,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:14,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:14,902 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:11 [2021-06-05 05:07:14,923 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:14,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643002828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:14,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:14,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:07:14,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478864460] [2021-06-05 05:07:14,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:07:14,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:14,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:07:14,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:07:14,924 INFO L87 Difference]: Start difference. First operand 919 states and 2183 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:15,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:15,987 INFO L93 Difference]: Finished difference Result 2181 states and 5300 transitions. [2021-06-05 05:07:15,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:07:15,988 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-06-05 05:07:15,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:15,990 INFO L225 Difference]: With dead ends: 2181 [2021-06-05 05:07:15,990 INFO L226 Difference]: Without dead ends: 2171 [2021-06-05 05:07:15,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 626.8ms TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:07:15,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-06-05 05:07:16,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 919. [2021-06-05 05:07:16,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 2.377995642701525) internal successors, (2183), 918 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:16,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2183 transitions. [2021-06-05 05:07:16,005 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2183 transitions. Word has length 30 [2021-06-05 05:07:16,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:16,005 INFO L482 AbstractCegarLoop]: Abstraction has 919 states and 2183 transitions. [2021-06-05 05:07:16,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:16,005 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2183 transitions. [2021-06-05 05:07:16,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:07:16,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:16,006 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:16,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-06-05 05:07:16,209 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:16,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:16,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1787800249, now seen corresponding path program 8 times [2021-06-05 05:07:16,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:16,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842377928] [2021-06-05 05:07:16,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:16,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:16,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:16,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:16,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842377928] [2021-06-05 05:07:16,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842377928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:16,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456243245] [2021-06-05 05:07:16,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:16,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:07:16,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:16,482 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:07:16,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:16,628 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 28 treesize of output 16 [2021-06-05 05:07:16,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:16,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:16,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:16,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:07:16,652 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:16,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456243245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:16,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:16,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-06-05 05:07:16,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211386952] [2021-06-05 05:07:16,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:07:16,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:16,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:07:16,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:07:16,653 INFO L87 Difference]: Start difference. First operand 919 states and 2183 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:17,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:17,974 INFO L93 Difference]: Finished difference Result 2227 states and 5452 transitions. [2021-06-05 05:07:17,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:07:17,974 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:07:17,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:17,976 INFO L225 Difference]: With dead ends: 2227 [2021-06-05 05:07:17,976 INFO L226 Difference]: Without dead ends: 2218 [2021-06-05 05:07:17,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 974.9ms TimeCoverageRelationStatistics Valid=258, Invalid=1464, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:07:17,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2021-06-05 05:07:17,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 943. [2021-06-05 05:07:17,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 942 states have (on average 2.3832271762208066) internal successors, (2245), 942 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:17,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 2245 transitions. [2021-06-05 05:07:17,988 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 2245 transitions. Word has length 30 [2021-06-05 05:07:17,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:17,988 INFO L482 AbstractCegarLoop]: Abstraction has 943 states and 2245 transitions. [2021-06-05 05:07:17,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:17,988 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 2245 transitions. [2021-06-05 05:07:17,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:07:17,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:17,989 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:18,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:18,189 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:18,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:18,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1886679911, now seen corresponding path program 9 times [2021-06-05 05:07:18,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:18,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728757082] [2021-06-05 05:07:18,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:18,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:18,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:18,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728757082] [2021-06-05 05:07:18,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728757082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:18,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950248978] [2021-06-05 05:07:18,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:18,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:07:18,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:18,453 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:07:18,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:18,592 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 05:07:18,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-06-05 05:07:18,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:18,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:18,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:18,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:14 [2021-06-05 05:07:18,619 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:18,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950248978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:18,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:18,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 05:07:18,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793516424] [2021-06-05 05:07:18,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:07:18,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:18,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:07:18,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:07:18,620 INFO L87 Difference]: Start difference. First operand 943 states and 2245 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:19,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:19,782 INFO L93 Difference]: Finished difference Result 2256 states and 5532 transitions. [2021-06-05 05:07:19,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:07:19,783 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:07:19,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:19,785 INFO L225 Difference]: With dead ends: 2256 [2021-06-05 05:07:19,785 INFO L226 Difference]: Without dead ends: 2245 [2021-06-05 05:07:19,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 963.3ms TimeCoverageRelationStatistics Valid=287, Invalid=1435, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:07:19,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2021-06-05 05:07:19,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 955. [2021-06-05 05:07:19,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 2.3846960167714886) internal successors, (2275), 954 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:19,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 2275 transitions. [2021-06-05 05:07:19,796 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 2275 transitions. Word has length 30 [2021-06-05 05:07:19,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:19,796 INFO L482 AbstractCegarLoop]: Abstraction has 955 states and 2275 transitions. [2021-06-05 05:07:19,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:19,796 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 2275 transitions. [2021-06-05 05:07:19,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:07:19,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:19,797 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:19,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-05 05:07:19,998 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:19,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:19,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1743084217, now seen corresponding path program 10 times [2021-06-05 05:07:19,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:19,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706637831] [2021-06-05 05:07:19,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:20,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:20,231 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:20,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:20,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706637831] [2021-06-05 05:07:20,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706637831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:20,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435295501] [2021-06-05 05:07:20,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:20,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:07:20,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:20,253 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:07:20,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:20,378 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 29 treesize of output 17 [2021-06-05 05:07:20,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:20,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:20,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:20,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:14 [2021-06-05 05:07:20,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:20,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435295501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:20,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:20,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 05:07:20,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244885846] [2021-06-05 05:07:20,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:07:20,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:20,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:07:20,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:07:20,410 INFO L87 Difference]: Start difference. First operand 955 states and 2275 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:21,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:21,663 INFO L93 Difference]: Finished difference Result 2341 states and 5751 transitions. [2021-06-05 05:07:21,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:07:21,663 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:07:21,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:21,665 INFO L225 Difference]: With dead ends: 2341 [2021-06-05 05:07:21,665 INFO L226 Difference]: Without dead ends: 2321 [2021-06-05 05:07:21,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1032.6ms TimeCoverageRelationStatistics Valid=312, Invalid=1580, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:07:21,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2321 states. [2021-06-05 05:07:21,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2321 to 934. [2021-06-05 05:07:21,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 2.380493033226152) internal successors, (2221), 933 states have internal predecessors, (2221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:21,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 2221 transitions. [2021-06-05 05:07:21,676 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 2221 transitions. Word has length 30 [2021-06-05 05:07:21,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:21,677 INFO L482 AbstractCegarLoop]: Abstraction has 934 states and 2221 transitions. [2021-06-05 05:07:21,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:21,677 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 2221 transitions. [2021-06-05 05:07:21,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:07:21,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:21,677 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:21,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 05:07:21,878 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:21,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:21,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1320754679, now seen corresponding path program 11 times [2021-06-05 05:07:21,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:21,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083043696] [2021-06-05 05:07:21,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:22,122 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:22,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:22,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083043696] [2021-06-05 05:07:22,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083043696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:22,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377078595] [2021-06-05 05:07:22,123 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:22,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:07:22,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:22,144 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:07:22,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:22,285 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 05:07:22,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-06-05 05:07:22,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:22,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:22,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:22,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:14 [2021-06-05 05:07:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:22,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377078595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:22,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:22,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 05:07:22,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652200860] [2021-06-05 05:07:22,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:07:22,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:22,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:07:22,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:07:22,313 INFO L87 Difference]: Start difference. First operand 934 states and 2221 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:23,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:23,717 INFO L93 Difference]: Finished difference Result 2334 states and 5711 transitions. [2021-06-05 05:07:23,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:07:23,717 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:07:23,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:23,719 INFO L225 Difference]: With dead ends: 2334 [2021-06-05 05:07:23,719 INFO L226 Difference]: Without dead ends: 2323 [2021-06-05 05:07:23,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1053.5ms TimeCoverageRelationStatistics Valid=335, Invalid=1557, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:07:23,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2021-06-05 05:07:23,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 949. [2021-06-05 05:07:23,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 948 states have (on average 2.3818565400843883) internal successors, (2258), 948 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:23,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 2258 transitions. [2021-06-05 05:07:23,730 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 2258 transitions. Word has length 30 [2021-06-05 05:07:23,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:23,731 INFO L482 AbstractCegarLoop]: Abstraction has 949 states and 2258 transitions. [2021-06-05 05:07:23,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:23,731 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 2258 transitions. [2021-06-05 05:07:23,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:07:23,731 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:23,731 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:23,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:23,932 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:23,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:23,932 INFO L82 PathProgramCache]: Analyzing trace with hash 435646371, now seen corresponding path program 12 times [2021-06-05 05:07:23,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:23,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92170679] [2021-06-05 05:07:23,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:23,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:24,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:24,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:24,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92170679] [2021-06-05 05:07:24,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92170679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:24,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137994157] [2021-06-05 05:07:24,176 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:24,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:07:24,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:24,197 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:07:24,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:24,369 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:24,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-06-05 05:07:24,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:24,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,383 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-06-05 05:07:24,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:24,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137994157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:24,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:24,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 05:07:24,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422765564] [2021-06-05 05:07:24,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:07:24,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:24,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:07:24,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:07:24,461 INFO L87 Difference]: Start difference. First operand 949 states and 2258 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:26,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:26,366 INFO L93 Difference]: Finished difference Result 2492 states and 6124 transitions. [2021-06-05 05:07:26,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:07:26,367 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:07:26,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:26,369 INFO L225 Difference]: With dead ends: 2492 [2021-06-05 05:07:26,369 INFO L226 Difference]: Without dead ends: 2480 [2021-06-05 05:07:26,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1556.6ms TimeCoverageRelationStatistics Valid=522, Invalid=2448, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:07:26,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2480 states. [2021-06-05 05:07:26,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2480 to 970. [2021-06-05 05:07:26,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 969 states have (on average 2.3859649122807016) internal successors, (2312), 969 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:26,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 2312 transitions. [2021-06-05 05:07:26,382 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 2312 transitions. Word has length 30 [2021-06-05 05:07:26,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:26,382 INFO L482 AbstractCegarLoop]: Abstraction has 970 states and 2312 transitions. [2021-06-05 05:07:26,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:26,382 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 2312 transitions. [2021-06-05 05:07:26,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:07:26,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:26,383 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:26,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:26,583 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:26,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:26,583 INFO L82 PathProgramCache]: Analyzing trace with hash -482303819, now seen corresponding path program 13 times [2021-06-05 05:07:26,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:26,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114935316] [2021-06-05 05:07:26,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:26,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:26,831 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:26,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:26,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114935316] [2021-06-05 05:07:26,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114935316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:26,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331099755] [2021-06-05 05:07:26,832 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:26,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:26,853 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:07:26,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:27,000 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 05:07:27,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-06-05 05:07:27,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:27,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:27,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:27,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:14 [2021-06-05 05:07:27,041 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:27,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331099755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:27,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:27,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:07:27,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127763797] [2021-06-05 05:07:27,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:07:27,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:27,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:07:27,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:07:27,042 INFO L87 Difference]: Start difference. First operand 970 states and 2312 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:29,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:29,148 INFO L93 Difference]: Finished difference Result 2813 states and 6856 transitions. [2021-06-05 05:07:29,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 05:07:29,149 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-06-05 05:07:29,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:29,151 INFO L225 Difference]: With dead ends: 2813 [2021-06-05 05:07:29,151 INFO L226 Difference]: Without dead ends: 2791 [2021-06-05 05:07:29,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 1718.9ms TimeCoverageRelationStatistics Valid=680, Invalid=3226, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:07:29,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2021-06-05 05:07:29,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 937. [2021-06-05 05:07:29,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 2.3792735042735043) internal successors, (2227), 936 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:29,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 2227 transitions. [2021-06-05 05:07:29,163 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 2227 transitions. Word has length 30 [2021-06-05 05:07:29,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:29,163 INFO L482 AbstractCegarLoop]: Abstraction has 937 states and 2227 transitions. [2021-06-05 05:07:29,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:29,163 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 2227 transitions. [2021-06-05 05:07:29,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:07:29,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:29,164 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:29,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-06-05 05:07:29,364 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:29,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:29,365 INFO L82 PathProgramCache]: Analyzing trace with hash 971090579, now seen corresponding path program 14 times [2021-06-05 05:07:29,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:29,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166497817] [2021-06-05 05:07:29,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:29,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:29,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:29,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:29,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166497817] [2021-06-05 05:07:29,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166497817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:29,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559212426] [2021-06-05 05:07:29,611 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:29,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:07:29,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:29,633 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:07:29,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:29,824 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:29,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-06-05 05:07:29,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:29,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:29,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:29,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2021-06-05 05:07:29,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:29,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559212426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:29,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:29,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-05 05:07:29,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436582867] [2021-06-05 05:07:29,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:07:29,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:29,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:07:29,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:07:29,930 INFO L87 Difference]: Start difference. First operand 937 states and 2227 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:32,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:32,270 INFO L93 Difference]: Finished difference Result 2461 states and 5969 transitions. [2021-06-05 05:07:32,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:07:32,270 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 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 30 [2021-06-05 05:07:32,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:32,273 INFO L225 Difference]: With dead ends: 2461 [2021-06-05 05:07:32,273 INFO L226 Difference]: Without dead ends: 2441 [2021-06-05 05:07:32,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 1831.8ms TimeCoverageRelationStatistics Valid=672, Invalid=2988, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:07:32,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2441 states. [2021-06-05 05:07:32,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2441 to 947. [2021-06-05 05:07:32,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 2.382663847780127) internal successors, (2254), 946 states have internal predecessors, (2254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:32,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 2254 transitions. [2021-06-05 05:07:32,284 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 2254 transitions. Word has length 30 [2021-06-05 05:07:32,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:32,284 INFO L482 AbstractCegarLoop]: Abstraction has 947 states and 2254 transitions. [2021-06-05 05:07:32,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:32,284 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 2254 transitions. [2021-06-05 05:07:32,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:07:32,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:32,285 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:32,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:32,486 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:32,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:32,487 INFO L82 PathProgramCache]: Analyzing trace with hash -292888029, now seen corresponding path program 15 times [2021-06-05 05:07:32,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:32,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746838922] [2021-06-05 05:07:32,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:32,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:32,730 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:32,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:32,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746838922] [2021-06-05 05:07:32,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746838922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:32,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422935529] [2021-06-05 05:07:32,730 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:32,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:07:32,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:32,753 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:07:32,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:32,949 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:32,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:07:32,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:32,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:32,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:32,969 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:95 [2021-06-05 05:07:33,194 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-06-05 05:07:33,228 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:33,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422935529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:33,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:33,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-05 05:07:33,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039072877] [2021-06-05 05:07:33,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:07:33,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:33,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:07:33,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:07:33,229 INFO L87 Difference]: Start difference. First operand 947 states and 2254 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:33,748 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-06-05 05:07:35,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:35,986 INFO L93 Difference]: Finished difference Result 2339 states and 5693 transitions. [2021-06-05 05:07:35,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:07:35,986 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 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 30 [2021-06-05 05:07:35,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:35,988 INFO L225 Difference]: With dead ends: 2339 [2021-06-05 05:07:35,988 INFO L226 Difference]: Without dead ends: 2328 [2021-06-05 05:07:35,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 2319.4ms TimeCoverageRelationStatistics Valid=562, Invalid=3098, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:07:35,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-05 05:07:35,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 971. [2021-06-05 05:07:35,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 2.3855670103092783) internal successors, (2314), 970 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:36,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 2314 transitions. [2021-06-05 05:07:36,000 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 2314 transitions. Word has length 30 [2021-06-05 05:07:36,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:36,000 INFO L482 AbstractCegarLoop]: Abstraction has 971 states and 2314 transitions. [2021-06-05 05:07:36,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:36,000 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 2314 transitions. [2021-06-05 05:07:36,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:07:36,001 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:36,001 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:36,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 05:07:36,201 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:36,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:36,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1463513021, now seen corresponding path program 16 times [2021-06-05 05:07:36,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:36,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758324056] [2021-06-05 05:07:36,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:36,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:36,440 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:36,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:36,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758324056] [2021-06-05 05:07:36,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758324056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:36,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82730575] [2021-06-05 05:07:36,441 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:36,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:07:36,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:36,463 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:07:36,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:36,595 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 29 treesize of output 17 [2021-06-05 05:07:36,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:36,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:36,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:36,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:14 [2021-06-05 05:07:36,622 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:36,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82730575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:36,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:36,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 05:07:36,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257203996] [2021-06-05 05:07:36,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:07:36,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:36,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:07:36,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:07:36,623 INFO L87 Difference]: Start difference. First operand 971 states and 2314 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:38,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:38,016 INFO L93 Difference]: Finished difference Result 2622 states and 6449 transitions. [2021-06-05 05:07:38,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:07:38,017 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:07:38,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:38,019 INFO L225 Difference]: With dead ends: 2622 [2021-06-05 05:07:38,019 INFO L226 Difference]: Without dead ends: 2602 [2021-06-05 05:07:38,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1161.7ms TimeCoverageRelationStatistics Valid=375, Invalid=1605, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:07:38,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2021-06-05 05:07:38,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 980. [2021-06-05 05:07:38,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 979 states have (on average 2.3861082737487234) internal successors, (2336), 979 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:38,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 2336 transitions. [2021-06-05 05:07:38,030 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 2336 transitions. Word has length 30 [2021-06-05 05:07:38,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:38,031 INFO L482 AbstractCegarLoop]: Abstraction has 980 states and 2336 transitions. [2021-06-05 05:07:38,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:38,031 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 2336 transitions. [2021-06-05 05:07:38,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:07:38,031 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:38,031 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:38,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-06-05 05:07:38,232 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:38,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:38,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1998957229, now seen corresponding path program 17 times [2021-06-05 05:07:38,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:38,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863463831] [2021-06-05 05:07:38,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:38,473 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:38,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:38,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863463831] [2021-06-05 05:07:38,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863463831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:38,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131259801] [2021-06-05 05:07:38,474 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:38,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:07:38,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:38,495 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:07:38,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:38,661 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 05:07:38,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-06-05 05:07:38,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:38,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:38,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:38,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:11 [2021-06-05 05:07:38,687 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:38,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131259801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:38,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:38,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:07:38,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300636371] [2021-06-05 05:07:38,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:07:38,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:38,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:07:38,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:07:38,688 INFO L87 Difference]: Start difference. First operand 980 states and 2336 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:40,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:40,129 INFO L93 Difference]: Finished difference Result 2208 states and 5368 transitions. [2021-06-05 05:07:40,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:07:40,129 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-06-05 05:07:40,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:40,131 INFO L225 Difference]: With dead ends: 2208 [2021-06-05 05:07:40,131 INFO L226 Difference]: Without dead ends: 2188 [2021-06-05 05:07:40,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1170.8ms TimeCoverageRelationStatistics Valid=380, Invalid=1600, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:07:40,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2021-06-05 05:07:40,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 980. [2021-06-05 05:07:40,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 979 states have (on average 2.3840653728294177) internal successors, (2334), 979 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:40,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 2334 transitions. [2021-06-05 05:07:40,147 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 2334 transitions. Word has length 30 [2021-06-05 05:07:40,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:40,147 INFO L482 AbstractCegarLoop]: Abstraction has 980 states and 2334 transitions. [2021-06-05 05:07:40,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:40,147 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 2334 transitions. [2021-06-05 05:07:40,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:07:40,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:40,148 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:40,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 05:07:40,348 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:40,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:40,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1891263929, now seen corresponding path program 18 times [2021-06-05 05:07:40,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:40,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574115414] [2021-06-05 05:07:40,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:40,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:40,587 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:40,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:40,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574115414] [2021-06-05 05:07:40,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574115414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:40,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886527305] [2021-06-05 05:07:40,587 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:40,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:07:40,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:40,608 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:07:40,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:40,749 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 29 treesize of output 17 [2021-06-05 05:07:40,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:40,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:40,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:40,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-05 05:07:40,775 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:40,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886527305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:40,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:40,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:07:40,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362435241] [2021-06-05 05:07:40,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:07:40,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:40,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:07:40,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:07:40,775 INFO L87 Difference]: Start difference. First operand 980 states and 2334 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:42,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:42,306 INFO L93 Difference]: Finished difference Result 2256 states and 5482 transitions. [2021-06-05 05:07:42,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:07:42,307 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-06-05 05:07:42,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:42,309 INFO L225 Difference]: With dead ends: 2256 [2021-06-05 05:07:42,309 INFO L226 Difference]: Without dead ends: 2219 [2021-06-05 05:07:42,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1139.2ms TimeCoverageRelationStatistics Valid=351, Invalid=1455, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:07:42,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2219 states. [2021-06-05 05:07:42,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2219 to 971. [2021-06-05 05:07:42,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 2.3804123711340206) internal successors, (2309), 970 states have internal predecessors, (2309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:42,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 2309 transitions. [2021-06-05 05:07:42,324 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 2309 transitions. Word has length 30 [2021-06-05 05:07:42,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:42,324 INFO L482 AbstractCegarLoop]: Abstraction has 971 states and 2309 transitions. [2021-06-05 05:07:42,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:42,324 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 2309 transitions. [2021-06-05 05:07:42,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:07:42,325 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:42,325 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:42,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 05:07:42,525 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:42,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:42,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1162356301, now seen corresponding path program 19 times [2021-06-05 05:07:42,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:42,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65938756] [2021-06-05 05:07:42,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:42,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:42,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:42,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:42,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65938756] [2021-06-05 05:07:42,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65938756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:42,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761334509] [2021-06-05 05:07:42,725 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:42,746 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:07:42,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:42,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:07:42,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:42,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:42,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:42,874 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:14 [2021-06-05 05:07:42,895 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:42,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761334509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:42,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:42,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 05:07:42,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000270373] [2021-06-05 05:07:42,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:07:42,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:42,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:07:42,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:07:42,896 INFO L87 Difference]: Start difference. First operand 971 states and 2309 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:43,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:43,789 INFO L93 Difference]: Finished difference Result 2540 states and 6224 transitions. [2021-06-05 05:07:43,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:07:43,789 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:07:43,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:43,791 INFO L225 Difference]: With dead ends: 2540 [2021-06-05 05:07:43,791 INFO L226 Difference]: Without dead ends: 2529 [2021-06-05 05:07:43,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 724.6ms TimeCoverageRelationStatistics Valid=244, Invalid=1088, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:07:43,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2529 states. [2021-06-05 05:07:43,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2529 to 1010. [2021-06-05 05:07:43,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1009 states have (on average 2.3885034687809714) internal successors, (2410), 1009 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:43,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 2410 transitions. [2021-06-05 05:07:43,804 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 2410 transitions. Word has length 30 [2021-06-05 05:07:43,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:43,804 INFO L482 AbstractCegarLoop]: Abstraction has 1010 states and 2410 transitions. [2021-06-05 05:07:43,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:43,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 2410 transitions. [2021-06-05 05:07:43,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:07:43,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:43,805 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:44,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 05:07:44,007 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:44,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:44,007 INFO L82 PathProgramCache]: Analyzing trace with hash 594044749, now seen corresponding path program 20 times [2021-06-05 05:07:44,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:44,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122930342] [2021-06-05 05:07:44,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:44,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:44,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:44,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122930342] [2021-06-05 05:07:44,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122930342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:44,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496010484] [2021-06-05 05:07:44,205 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:44,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:07:44,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:44,226 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:07:44,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:44,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:44,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-06-05 05:07:44,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:44,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:44,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:44,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-06-05 05:07:44,501 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:44,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496010484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:44,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:44,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 05:07:44,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007587799] [2021-06-05 05:07:44,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:07:44,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:44,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:07:44,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:07:44,502 INFO L87 Difference]: Start difference. First operand 1010 states and 2410 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:45,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:45,719 INFO L93 Difference]: Finished difference Result 2582 states and 6364 transitions. [2021-06-05 05:07:45,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:07:45,719 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:07:45,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:45,721 INFO L225 Difference]: With dead ends: 2582 [2021-06-05 05:07:45,722 INFO L226 Difference]: Without dead ends: 2570 [2021-06-05 05:07:45,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1027.2ms TimeCoverageRelationStatistics Valid=361, Invalid=1531, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:07:45,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2021-06-05 05:07:45,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 1045. [2021-06-05 05:07:45,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 2.3946360153256707) internal successors, (2500), 1044 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:45,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 2500 transitions. [2021-06-05 05:07:45,733 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 2500 transitions. Word has length 30 [2021-06-05 05:07:45,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:45,734 INFO L482 AbstractCegarLoop]: Abstraction has 1045 states and 2500 transitions. [2021-06-05 05:07:45,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:45,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 2500 transitions. [2021-06-05 05:07:45,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:07:45,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:45,735 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:45,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:45,935 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:45,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:45,935 INFO L82 PathProgramCache]: Analyzing trace with hash -323905441, now seen corresponding path program 21 times [2021-06-05 05:07:45,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:45,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914917103] [2021-06-05 05:07:45,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:45,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:46,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:46,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:46,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914917103] [2021-06-05 05:07:46,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914917103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:46,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821050294] [2021-06-05 05:07:46,136 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:46,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:07:46,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:46,157 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:07:46,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:46,285 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 29 treesize of output 17 [2021-06-05 05:07:46,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:46,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:46,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:46,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:14 [2021-06-05 05:07:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:46,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821050294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:46,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:46,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:07:46,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138361625] [2021-06-05 05:07:46,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:07:46,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:46,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:07:46,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:07:46,326 INFO L87 Difference]: Start difference. First operand 1045 states and 2500 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:47,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:47,722 INFO L93 Difference]: Finished difference Result 2927 states and 7176 transitions. [2021-06-05 05:07:47,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:07:47,722 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-06-05 05:07:47,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:47,724 INFO L225 Difference]: With dead ends: 2927 [2021-06-05 05:07:47,724 INFO L226 Difference]: Without dead ends: 2905 [2021-06-05 05:07:47,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1042.9ms TimeCoverageRelationStatistics Valid=424, Invalid=1738, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:07:47,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2905 states. [2021-06-05 05:07:47,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2905 to 991. [2021-06-05 05:07:47,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 2.3848484848484848) internal successors, (2361), 990 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:47,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 2361 transitions. [2021-06-05 05:07:47,742 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 2361 transitions. Word has length 30 [2021-06-05 05:07:47,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:47,743 INFO L482 AbstractCegarLoop]: Abstraction has 991 states and 2361 transitions. [2021-06-05 05:07:47,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:47,743 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 2361 transitions. [2021-06-05 05:07:47,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:07:47,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:47,744 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:47,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:47,944 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:47,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:47,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1129488957, now seen corresponding path program 22 times [2021-06-05 05:07:47,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:47,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752970962] [2021-06-05 05:07:47,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:48,138 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:48,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:48,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752970962] [2021-06-05 05:07:48,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752970962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:48,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429568697] [2021-06-05 05:07:48,139 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:48,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:07:48,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:48,160 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:07:48,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:48,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:07:48,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:48,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:48,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:48,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-05 05:07:48,324 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:48,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429568697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:48,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:48,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:07:48,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522779899] [2021-06-05 05:07:48,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:07:48,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:48,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:07:48,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:07:48,325 INFO L87 Difference]: Start difference. First operand 991 states and 2361 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:49,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:49,303 INFO L93 Difference]: Finished difference Result 2295 states and 5561 transitions. [2021-06-05 05:07:49,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:07:49,303 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-06-05 05:07:49,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:49,305 INFO L225 Difference]: With dead ends: 2295 [2021-06-05 05:07:49,305 INFO L226 Difference]: Without dead ends: 2275 [2021-06-05 05:07:49,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 753.2ms TimeCoverageRelationStatistics Valid=303, Invalid=1179, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:07:49,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2275 states. [2021-06-05 05:07:49,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2275 to 989. [2021-06-05 05:07:49,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 988 states have (on average 2.383603238866397) internal successors, (2355), 988 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:49,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 2355 transitions. [2021-06-05 05:07:49,317 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 2355 transitions. Word has length 30 [2021-06-05 05:07:49,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:49,317 INFO L482 AbstractCegarLoop]: Abstraction has 989 states and 2355 transitions. [2021-06-05 05:07:49,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:49,317 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 2355 transitions. [2021-06-05 05:07:49,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:07:49,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:49,318 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:49,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:49,518 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:49,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:49,518 INFO L82 PathProgramCache]: Analyzing trace with hash -508083499, now seen corresponding path program 23 times [2021-06-05 05:07:49,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:49,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149849553] [2021-06-05 05:07:49,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:49,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:49,719 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:49,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:49,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149849553] [2021-06-05 05:07:49,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149849553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:49,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145253721] [2021-06-05 05:07:49,719 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:49,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:07:49,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:49,741 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:07:49,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:49,887 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 29 treesize of output 17 [2021-06-05 05:07:49,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:49,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:49,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:49,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-05 05:07:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:49,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145253721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:49,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:49,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:07:49,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849099610] [2021-06-05 05:07:49,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:07:49,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:49,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:07:49,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:07:49,911 INFO L87 Difference]: Start difference. First operand 989 states and 2355 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:50,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:50,974 INFO L93 Difference]: Finished difference Result 2384 states and 5767 transitions. [2021-06-05 05:07:50,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:07:50,974 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-06-05 05:07:50,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:50,976 INFO L225 Difference]: With dead ends: 2384 [2021-06-05 05:07:50,976 INFO L226 Difference]: Without dead ends: 2347 [2021-06-05 05:07:50,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 811.0ms TimeCoverageRelationStatistics Valid=286, Invalid=1120, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:07:50,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2021-06-05 05:07:50,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 974. [2021-06-05 05:07:50,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 2.3802672147995887) internal successors, (2316), 973 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:50,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 2316 transitions. [2021-06-05 05:07:50,997 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 2316 transitions. Word has length 30 [2021-06-05 05:07:50,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:50,997 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 2316 transitions. [2021-06-05 05:07:50,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:50,997 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 2316 transitions. [2021-06-05 05:07:50,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:07:50,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:50,998 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:51,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 05:07:51,198 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:51,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:51,198 INFO L82 PathProgramCache]: Analyzing trace with hash -2141487853, now seen corresponding path program 24 times [2021-06-05 05:07:51,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:51,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930613699] [2021-06-05 05:07:51,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:51,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:51,407 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:51,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:51,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930613699] [2021-06-05 05:07:51,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930613699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:51,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248980824] [2021-06-05 05:07:51,408 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 05:07:51,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:07:51,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:51,441 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:07:51,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:51,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:07:51,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:51,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:51,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:51,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:11 [2021-06-05 05:07:51,615 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:51,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248980824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:51,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:51,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:07:51,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327840432] [2021-06-05 05:07:51,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:07:51,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:51,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:07:51,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:07:51,616 INFO L87 Difference]: Start difference. First operand 974 states and 2316 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:52,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:52,389 INFO L93 Difference]: Finished difference Result 2266 states and 5502 transitions. [2021-06-05 05:07:52,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:07:52,390 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-06-05 05:07:52,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:52,392 INFO L225 Difference]: With dead ends: 2266 [2021-06-05 05:07:52,392 INFO L226 Difference]: Without dead ends: 2256 [2021-06-05 05:07:52,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 626.4ms TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:07:52,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2021-06-05 05:07:52,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 971. [2021-06-05 05:07:52,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 2.3804123711340206) internal successors, (2309), 970 states have internal predecessors, (2309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:52,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 2309 transitions. [2021-06-05 05:07:52,403 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 2309 transitions. Word has length 30 [2021-06-05 05:07:52,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:52,403 INFO L482 AbstractCegarLoop]: Abstraction has 971 states and 2309 transitions. [2021-06-05 05:07:52,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:52,403 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 2309 transitions. [2021-06-05 05:07:52,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:07:52,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:52,404 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:52,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 05:07:52,605 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:52,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:52,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1543469255, now seen corresponding path program 1 times [2021-06-05 05:07:52,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:52,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522836251] [2021-06-05 05:07:52,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:52,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:52,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:52,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522836251] [2021-06-05 05:07:52,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522836251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:52,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761977535] [2021-06-05 05:07:52,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:52,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:52,838 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:07:52,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:52,988 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 28 treesize of output 16 [2021-06-05 05:07:52,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:52,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:52,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:52,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:07:53,013 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:53,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761977535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:53,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:53,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:07:53,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991031392] [2021-06-05 05:07:53,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:07:53,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:53,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:07:53,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:07:53,014 INFO L87 Difference]: Start difference. First operand 971 states and 2309 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:53,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:53,969 INFO L93 Difference]: Finished difference Result 2326 states and 5643 transitions. [2021-06-05 05:07:53,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:07:53,969 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 30 [2021-06-05 05:07:53,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:53,972 INFO L225 Difference]: With dead ends: 2326 [2021-06-05 05:07:53,972 INFO L226 Difference]: Without dead ends: 2316 [2021-06-05 05:07:53,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 659.5ms TimeCoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:07:53,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2021-06-05 05:07:53,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 1015. [2021-06-05 05:07:53,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 1014 states have (on average 2.371794871794872) internal successors, (2405), 1014 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:53,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 2405 transitions. [2021-06-05 05:07:53,984 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 2405 transitions. Word has length 30 [2021-06-05 05:07:53,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:53,984 INFO L482 AbstractCegarLoop]: Abstraction has 1015 states and 2405 transitions. [2021-06-05 05:07:53,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:53,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 2405 transitions. [2021-06-05 05:07:53,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:07:53,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:53,985 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:54,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 05:07:54,185 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:54,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:54,186 INFO L82 PathProgramCache]: Analyzing trace with hash 334113745, now seen corresponding path program 2 times [2021-06-05 05:07:54,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:54,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901428755] [2021-06-05 05:07:54,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:54,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:54,394 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:54,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:54,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901428755] [2021-06-05 05:07:54,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901428755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:54,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884458668] [2021-06-05 05:07:54,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:54,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:07:54,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:54,415 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:07:54,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:54,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 05:07:54,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:54,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:54,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:54,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:07:54,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:54,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884458668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:54,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:54,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 05:07:54,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533303226] [2021-06-05 05:07:54,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:07:54,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:54,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:07:54,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:07:54,574 INFO L87 Difference]: Start difference. First operand 1015 states and 2405 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:55,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:55,596 INFO L93 Difference]: Finished difference Result 2579 states and 6285 transitions. [2021-06-05 05:07:55,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:07:55,596 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:07:55,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:55,598 INFO L225 Difference]: With dead ends: 2579 [2021-06-05 05:07:55,598 INFO L226 Difference]: Without dead ends: 2568 [2021-06-05 05:07:55,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 723.3ms TimeCoverageRelationStatistics Valid=207, Invalid=1125, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:07:55,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2021-06-05 05:07:55,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 1049. [2021-06-05 05:07:55,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1048 states have (on average 2.3807251908396947) internal successors, (2495), 1048 states have internal predecessors, (2495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:55,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 2495 transitions. [2021-06-05 05:07:55,610 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 2495 transitions. Word has length 30 [2021-06-05 05:07:55,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:55,611 INFO L482 AbstractCegarLoop]: Abstraction has 1049 states and 2495 transitions. [2021-06-05 05:07:55,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:55,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 2495 transitions. [2021-06-05 05:07:55,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:07:55,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:55,612 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:55,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:55,812 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:55,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:55,812 INFO L82 PathProgramCache]: Analyzing trace with hash 2090514795, now seen corresponding path program 3 times [2021-06-05 05:07:55,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:55,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544071498] [2021-06-05 05:07:55,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:56,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:56,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:56,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544071498] [2021-06-05 05:07:56,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544071498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:56,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627135317] [2021-06-05 05:07:56,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:56,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:07:56,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:56,058 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:07:56,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:56,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:56,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:07:56,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 05:07:56,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:56,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:56,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:56,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:14 [2021-06-05 05:07:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:56,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627135317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:56,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:56,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-06-05 05:07:56,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078202354] [2021-06-05 05:07:56,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:07:56,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:56,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:07:56,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:07:56,327 INFO L87 Difference]: Start difference. First operand 1049 states and 2495 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:57,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:57,934 INFO L93 Difference]: Finished difference Result 2570 states and 6285 transitions. [2021-06-05 05:07:57,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:07:57,934 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:07:57,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:57,936 INFO L225 Difference]: With dead ends: 2570 [2021-06-05 05:07:57,936 INFO L226 Difference]: Without dead ends: 2558 [2021-06-05 05:07:57,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 1117.5ms TimeCoverageRelationStatistics Valid=321, Invalid=1749, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:07:57,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2558 states. [2021-06-05 05:07:57,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2558 to 1049. [2021-06-05 05:07:57,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1048 states have (on average 2.37881679389313) internal successors, (2493), 1048 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:57,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 2493 transitions. [2021-06-05 05:07:57,949 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 2493 transitions. Word has length 30 [2021-06-05 05:07:57,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:57,949 INFO L482 AbstractCegarLoop]: Abstraction has 1049 states and 2493 transitions. [2021-06-05 05:07:57,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:57,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 2493 transitions. [2021-06-05 05:07:57,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:07:57,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:57,950 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:58,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-06-05 05:07:58,150 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:58,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:58,151 INFO L82 PathProgramCache]: Analyzing trace with hash 519174883, now seen corresponding path program 4 times [2021-06-05 05:07:58,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:58,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826114593] [2021-06-05 05:07:58,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:58,356 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:58,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:58,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826114593] [2021-06-05 05:07:58,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826114593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:58,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415565909] [2021-06-05 05:07:58,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:58,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:07:58,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:58,377 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:07:58,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:58,522 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 28 treesize of output 16 [2021-06-05 05:07:58,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:58,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:58,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:58,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:07:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:58,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415565909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:58,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:58,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:07:58,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710357870] [2021-06-05 05:07:58,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:07:58,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:58,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:07:58,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:07:58,549 INFO L87 Difference]: Start difference. First operand 1049 states and 2493 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:59,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:59,476 INFO L93 Difference]: Finished difference Result 2493 states and 6029 transitions. [2021-06-05 05:07:59,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:07:59,476 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-06-05 05:07:59,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:59,478 INFO L225 Difference]: With dead ends: 2493 [2021-06-05 05:07:59,478 INFO L226 Difference]: Without dead ends: 2471 [2021-06-05 05:07:59,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 767.9ms TimeCoverageRelationStatistics Valid=274, Invalid=1058, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:07:59,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2021-06-05 05:07:59,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 1046. [2021-06-05 05:07:59,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 2.3779904306220097) internal successors, (2485), 1045 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:59,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 2485 transitions. [2021-06-05 05:07:59,490 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 2485 transitions. Word has length 30 [2021-06-05 05:07:59,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:59,491 INFO L482 AbstractCegarLoop]: Abstraction has 1046 states and 2485 transitions. [2021-06-05 05:07:59,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:59,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 2485 transitions. [2021-06-05 05:07:59,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:07:59,492 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:59,492 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:59,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:59,705 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:59,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:59,705 INFO L82 PathProgramCache]: Analyzing trace with hash -794070141, now seen corresponding path program 5 times [2021-06-05 05:07:59,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:59,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726312383] [2021-06-05 05:07:59,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:59,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:59,915 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:59,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:59,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726312383] [2021-06-05 05:07:59,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726312383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:59,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848250909] [2021-06-05 05:07:59,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:59,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:07:59,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:59,942 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:07:59,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:00,089 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 28 treesize of output 16 [2021-06-05 05:08:00,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:00,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:08:00,114 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:00,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848250909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:00,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:00,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:08:00,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204358286] [2021-06-05 05:08:00,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:08:00,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:00,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:08:00,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:08:00,115 INFO L87 Difference]: Start difference. First operand 1046 states and 2485 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:01,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:01,167 INFO L93 Difference]: Finished difference Result 2312 states and 5616 transitions. [2021-06-05 05:08:01,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:08:01,167 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-06-05 05:08:01,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:01,170 INFO L225 Difference]: With dead ends: 2312 [2021-06-05 05:08:01,170 INFO L226 Difference]: Without dead ends: 2302 [2021-06-05 05:08:01,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 655.9ms TimeCoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:08:01,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2302 states. [2021-06-05 05:08:01,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2302 to 1045. [2021-06-05 05:08:01,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 2.378352490421456) internal successors, (2483), 1044 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:01,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 2483 transitions. [2021-06-05 05:08:01,181 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 2483 transitions. Word has length 30 [2021-06-05 05:08:01,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:01,181 INFO L482 AbstractCegarLoop]: Abstraction has 1045 states and 2483 transitions. [2021-06-05 05:08:01,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:01,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 2483 transitions. [2021-06-05 05:08:01,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:08:01,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:01,182 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:01,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:01,383 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:01,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:01,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1395219345, now seen corresponding path program 6 times [2021-06-05 05:08:01,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:01,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633616582] [2021-06-05 05:08:01,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:01,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:01,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:01,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633616582] [2021-06-05 05:08:01,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633616582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:01,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80390909] [2021-06-05 05:08:01,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:01,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:08:01,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:01,612 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:08:01,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:01,768 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:01,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-06-05 05:08:01,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:08:01,808 INFO L628 ElimStorePlain]: treesize reduction 6, result has 90.9 percent of original size [2021-06-05 05:08:01,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:01,809 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:60 [2021-06-05 05:08:01,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:01,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80390909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:01,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:01,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2021-06-05 05:08:01,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49614989] [2021-06-05 05:08:01,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:08:01,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:01,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:08:01,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:08:01,929 INFO L87 Difference]: Start difference. First operand 1045 states and 2483 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:03,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:03,765 INFO L93 Difference]: Finished difference Result 3125 states and 7618 transitions. [2021-06-05 05:08:03,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:08:03,765 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 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 30 [2021-06-05 05:08:03,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:03,768 INFO L225 Difference]: With dead ends: 3125 [2021-06-05 05:08:03,768 INFO L226 Difference]: Without dead ends: 3111 [2021-06-05 05:08:03,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1501.5ms TimeCoverageRelationStatistics Valid=548, Invalid=2002, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:08:03,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2021-06-05 05:08:03,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 1038. [2021-06-05 05:08:03,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1037 states have (on average 2.3751205400192865) internal successors, (2463), 1037 states have internal predecessors, (2463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:03,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 2463 transitions. [2021-06-05 05:08:03,782 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 2463 transitions. Word has length 30 [2021-06-05 05:08:03,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:03,782 INFO L482 AbstractCegarLoop]: Abstraction has 1038 states and 2463 transitions. [2021-06-05 05:08:03,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:03,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 2463 transitions. [2021-06-05 05:08:03,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:08:03,783 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:03,783 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:03,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:03,983 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:03,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:03,984 INFO L82 PathProgramCache]: Analyzing trace with hash 316882413, now seen corresponding path program 7 times [2021-06-05 05:08:03,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:03,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406105522] [2021-06-05 05:08:03,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:03,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:04,192 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:04,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:04,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406105522] [2021-06-05 05:08:04,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406105522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:04,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497375052] [2021-06-05 05:08:04,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:04,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:04,217 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:08:04,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:04,346 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 25 treesize of output 15 [2021-06-05 05:08:04,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:04,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:04,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:04,351 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:08:04,388 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:04,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497375052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:04,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:04,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:08:04,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127970416] [2021-06-05 05:08:04,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:08:04,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:04,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:08:04,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:08:04,388 INFO L87 Difference]: Start difference. First operand 1038 states and 2463 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:05,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:05,264 INFO L93 Difference]: Finished difference Result 2535 states and 6141 transitions. [2021-06-05 05:08:05,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:08:05,265 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-06-05 05:08:05,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:05,267 INFO L225 Difference]: With dead ends: 2535 [2021-06-05 05:08:05,267 INFO L226 Difference]: Without dead ends: 2517 [2021-06-05 05:08:05,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 724.7ms TimeCoverageRelationStatistics Valid=278, Invalid=1128, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:08:05,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2517 states. [2021-06-05 05:08:05,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2517 to 1015. [2021-06-05 05:08:05,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 1014 states have (on average 2.371794871794872) internal successors, (2405), 1014 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:05,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 2405 transitions. [2021-06-05 05:08:05,279 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 2405 transitions. Word has length 30 [2021-06-05 05:08:05,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:05,279 INFO L482 AbstractCegarLoop]: Abstraction has 1015 states and 2405 transitions. [2021-06-05 05:08:05,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:05,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 2405 transitions. [2021-06-05 05:08:05,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:08:05,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:05,280 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:05,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 05:08:05,481 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:05,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:05,481 INFO L82 PathProgramCache]: Analyzing trace with hash -2074262811, now seen corresponding path program 8 times [2021-06-05 05:08:05,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:05,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165562910] [2021-06-05 05:08:05,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:05,685 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:05,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:05,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165562910] [2021-06-05 05:08:05,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165562910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:05,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212483536] [2021-06-05 05:08:05,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:05,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:08:05,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:05,708 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:08:05,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:05,887 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:05,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-06-05 05:08:05,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:08:05,935 INFO L628 ElimStorePlain]: treesize reduction 8, result has 86.7 percent of original size [2021-06-05 05:08:05,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:05,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:52 [2021-06-05 05:08:06,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:06,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212483536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:06,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:06,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 05:08:06,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386735725] [2021-06-05 05:08:06,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:08:06,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:06,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:08:06,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:08:06,027 INFO L87 Difference]: Start difference. First operand 1015 states and 2405 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:07,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:07,032 INFO L93 Difference]: Finished difference Result 2436 states and 5950 transitions. [2021-06-05 05:08:07,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:08:07,033 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:08:07,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:07,035 INFO L225 Difference]: With dead ends: 2436 [2021-06-05 05:08:07,035 INFO L226 Difference]: Without dead ends: 2425 [2021-06-05 05:08:07,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 922.7ms TimeCoverageRelationStatistics Valid=286, Invalid=1274, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:08:07,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2021-06-05 05:08:07,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1050. [2021-06-05 05:08:07,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 2.380362249761678) internal successors, (2497), 1049 states have internal predecessors, (2497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:07,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 2497 transitions. [2021-06-05 05:08:07,047 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 2497 transitions. Word has length 30 [2021-06-05 05:08:07,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:07,047 INFO L482 AbstractCegarLoop]: Abstraction has 1050 states and 2497 transitions. [2021-06-05 05:08:07,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:07,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 2497 transitions. [2021-06-05 05:08:07,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:08:07,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:07,048 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:07,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:07,252 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:07,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:07,253 INFO L82 PathProgramCache]: Analyzing trace with hash -317861761, now seen corresponding path program 9 times [2021-06-05 05:08:07,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:07,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726846243] [2021-06-05 05:08:07,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:07,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:07,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:07,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:07,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726846243] [2021-06-05 05:08:07,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726846243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:07,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203293733] [2021-06-05 05:08:07,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:07,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:08:07,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:07,478 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:08:07,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:07,610 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 25 treesize of output 15 [2021-06-05 05:08:07,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:07,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:07,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:07,615 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:08:07,636 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:07,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203293733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:07,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:07,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 05:08:07,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403772135] [2021-06-05 05:08:07,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:08:07,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:07,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:08:07,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:08:07,637 INFO L87 Difference]: Start difference. First operand 1050 states and 2497 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:08,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:08,727 INFO L93 Difference]: Finished difference Result 2686 states and 6580 transitions. [2021-06-05 05:08:08,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:08:08,727 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:08:08,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:08,729 INFO L225 Difference]: With dead ends: 2686 [2021-06-05 05:08:08,729 INFO L226 Difference]: Without dead ends: 2666 [2021-06-05 05:08:08,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 822.0ms TimeCoverageRelationStatistics Valid=295, Invalid=1265, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:08:08,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2021-06-05 05:08:08,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 1034. [2021-06-05 05:08:08,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 2.3756050338818975) internal successors, (2454), 1033 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:08,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 2454 transitions. [2021-06-05 05:08:08,742 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 2454 transitions. Word has length 30 [2021-06-05 05:08:08,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:08,742 INFO L482 AbstractCegarLoop]: Abstraction has 1034 states and 2454 transitions. [2021-06-05 05:08:08,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:08,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 2454 transitions. [2021-06-05 05:08:08,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:08:08,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:08,743 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:08,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:08,944 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:08,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:08,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1889201673, now seen corresponding path program 10 times [2021-06-05 05:08:08,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:08,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361559446] [2021-06-05 05:08:08,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:08,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:09,140 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:09,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:09,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361559446] [2021-06-05 05:08:09,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361559446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:09,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302037976] [2021-06-05 05:08:09,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:09,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:08:09,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:09,166 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:08:09,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:09,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 05:08:09,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:09,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:09,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:09,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:08:09,329 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:09,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302037976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:09,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:09,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:08:09,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283328976] [2021-06-05 05:08:09,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:08:09,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:09,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:08:09,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:08:09,330 INFO L87 Difference]: Start difference. First operand 1034 states and 2454 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:10,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:10,385 INFO L93 Difference]: Finished difference Result 2442 states and 5915 transitions. [2021-06-05 05:08:10,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:08:10,385 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-06-05 05:08:10,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:10,387 INFO L225 Difference]: With dead ends: 2442 [2021-06-05 05:08:10,387 INFO L226 Difference]: Without dead ends: 2419 [2021-06-05 05:08:10,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 769.5ms TimeCoverageRelationStatistics Valid=310, Invalid=1096, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:08:10,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2419 states. [2021-06-05 05:08:10,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2419 to 1019. [2021-06-05 05:08:10,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 2.3713163064833007) internal successors, (2414), 1018 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:10,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 2414 transitions. [2021-06-05 05:08:10,398 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 2414 transitions. Word has length 30 [2021-06-05 05:08:10,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:10,398 INFO L482 AbstractCegarLoop]: Abstraction has 1019 states and 2414 transitions. [2021-06-05 05:08:10,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:10,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 2414 transitions. [2021-06-05 05:08:10,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:08:10,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:10,399 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:10,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 05:08:10,600 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:10,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:10,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1092520599, now seen corresponding path program 11 times [2021-06-05 05:08:10,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:10,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985936159] [2021-06-05 05:08:10,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:10,817 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:10,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:10,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985936159] [2021-06-05 05:08:10,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985936159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:10,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217817025] [2021-06-05 05:08:10,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:10,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:08:10,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:10,839 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:08:10,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:10,980 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 28 treesize of output 16 [2021-06-05 05:08:10,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:10,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:10,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:10,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:08:11,004 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:11,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217817025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:11,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:11,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:08:11,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48551427] [2021-06-05 05:08:11,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:08:11,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:11,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:08:11,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:08:11,005 INFO L87 Difference]: Start difference. First operand 1019 states and 2414 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:11,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:11,757 INFO L93 Difference]: Finished difference Result 2279 states and 5538 transitions. [2021-06-05 05:08:11,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:08:11,757 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-06-05 05:08:11,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:11,759 INFO L225 Difference]: With dead ends: 2279 [2021-06-05 05:08:11,759 INFO L226 Difference]: Without dead ends: 2269 [2021-06-05 05:08:11,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 665.2ms TimeCoverageRelationStatistics Valid=233, Invalid=957, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:08:11,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2021-06-05 05:08:11,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 1016. [2021-06-05 05:08:11,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 2.3714285714285714) internal successors, (2407), 1015 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:11,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 2407 transitions. [2021-06-05 05:08:11,771 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 2407 transitions. Word has length 30 [2021-06-05 05:08:11,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:11,771 INFO L482 AbstractCegarLoop]: Abstraction has 1016 states and 2407 transitions. [2021-06-05 05:08:11,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:11,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 2407 transitions. [2021-06-05 05:08:11,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:08:11,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:11,772 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:11,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-05 05:08:11,972 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:11,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:11,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1905442861, now seen corresponding path program 12 times [2021-06-05 05:08:11,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:11,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229679882] [2021-06-05 05:08:11,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:11,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:12,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:12,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:12,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229679882] [2021-06-05 05:08:12,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229679882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:12,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526595405] [2021-06-05 05:08:12,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:12,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:08:12,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:12,224 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:08:12,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:12,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:12,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 31 [2021-06-05 05:08:12,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:08:12,436 INFO L628 ElimStorePlain]: treesize reduction 6, result has 90.3 percent of original size [2021-06-05 05:08:12,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:12,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:56 [2021-06-05 05:08:12,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:12,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526595405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:12,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:12,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 05:08:12,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350098747] [2021-06-05 05:08:12,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:08:12,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:12,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:08:12,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:08:12,538 INFO L87 Difference]: Start difference. First operand 1016 states and 2407 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:14,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:14,033 INFO L93 Difference]: Finished difference Result 2411 states and 5871 transitions. [2021-06-05 05:08:14,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:08:14,034 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:08:14,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:14,036 INFO L225 Difference]: With dead ends: 2411 [2021-06-05 05:08:14,036 INFO L226 Difference]: Without dead ends: 2400 [2021-06-05 05:08:14,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1216.5ms TimeCoverageRelationStatistics Valid=364, Invalid=1616, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:08:14,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-06-05 05:08:14,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 1040. [2021-06-05 05:08:14,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 2.3753609239653515) internal successors, (2468), 1039 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:14,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 2468 transitions. [2021-06-05 05:08:14,047 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 2468 transitions. Word has length 30 [2021-06-05 05:08:14,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:14,047 INFO L482 AbstractCegarLoop]: Abstraction has 1040 states and 2468 transitions. [2021-06-05 05:08:14,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:14,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 2468 transitions. [2021-06-05 05:08:14,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:08:14,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:14,048 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:14,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:14,263 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:14,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:14,263 INFO L82 PathProgramCache]: Analyzing trace with hash -633123385, now seen corresponding path program 13 times [2021-06-05 05:08:14,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:14,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067142485] [2021-06-05 05:08:14,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:14,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:14,494 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:14,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:14,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067142485] [2021-06-05 05:08:14,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067142485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:14,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451329902] [2021-06-05 05:08:14,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:14,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:14,515 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:08:14,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:14,632 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 25 treesize of output 15 [2021-06-05 05:08:14,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:14,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:14,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:14,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:08:14,659 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:14,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451329902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:14,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:14,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 05:08:14,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619646901] [2021-06-05 05:08:14,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:08:14,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:14,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:08:14,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:08:14,660 INFO L87 Difference]: Start difference. First operand 1040 states and 2468 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:15,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:15,832 INFO L93 Difference]: Finished difference Result 2592 states and 6361 transitions. [2021-06-05 05:08:15,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:08:15,832 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:08:15,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:15,834 INFO L225 Difference]: With dead ends: 2592 [2021-06-05 05:08:15,834 INFO L226 Difference]: Without dead ends: 2572 [2021-06-05 05:08:15,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 990.2ms TimeCoverageRelationStatistics Valid=338, Invalid=1468, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:08:15,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2572 states. [2021-06-05 05:08:15,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2572 to 1028. [2021-06-05 05:08:15,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1027 states have (on average 2.372930866601753) internal successors, (2437), 1027 states have internal predecessors, (2437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:15,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 2437 transitions. [2021-06-05 05:08:15,846 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 2437 transitions. Word has length 30 [2021-06-05 05:08:15,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:15,846 INFO L482 AbstractCegarLoop]: Abstraction has 1028 states and 2437 transitions. [2021-06-05 05:08:15,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:15,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 2437 transitions. [2021-06-05 05:08:15,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:08:15,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:15,847 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:16,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:16,047 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:16,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:16,048 INFO L82 PathProgramCache]: Analyzing trace with hash 895830683, now seen corresponding path program 14 times [2021-06-05 05:08:16,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:16,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821560324] [2021-06-05 05:08:16,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:16,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:16,284 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:16,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:16,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821560324] [2021-06-05 05:08:16,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821560324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:16,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374696215] [2021-06-05 05:08:16,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:16,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:08:16,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:16,306 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:08:16,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:16,490 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:16,491 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 28 treesize of output 32 [2021-06-05 05:08:16,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:16,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:16,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:16,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:32 [2021-06-05 05:08:16,580 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:16,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374696215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:16,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:16,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-05 05:08:16,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045920068] [2021-06-05 05:08:16,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:08:16,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:16,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:08:16,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:08:16,581 INFO L87 Difference]: Start difference. First operand 1028 states and 2437 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:18,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:18,364 INFO L93 Difference]: Finished difference Result 2575 states and 6256 transitions. [2021-06-05 05:08:18,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:08:18,364 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 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 30 [2021-06-05 05:08:18,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:18,367 INFO L225 Difference]: With dead ends: 2575 [2021-06-05 05:08:18,367 INFO L226 Difference]: Without dead ends: 2555 [2021-06-05 05:08:18,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 1574.8ms TimeCoverageRelationStatistics Valid=590, Invalid=2166, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:08:18,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2021-06-05 05:08:18,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 1019. [2021-06-05 05:08:18,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 2.3713163064833007) internal successors, (2414), 1018 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:18,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 2414 transitions. [2021-06-05 05:08:18,378 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 2414 transitions. Word has length 30 [2021-06-05 05:08:18,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:18,379 INFO L482 AbstractCegarLoop]: Abstraction has 1019 states and 2414 transitions. [2021-06-05 05:08:18,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:18,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 2414 transitions. [2021-06-05 05:08:18,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:08:18,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:18,379 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:18,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable274 [2021-06-05 05:08:18,580 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:18,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:18,580 INFO L82 PathProgramCache]: Analyzing trace with hash 578985487, now seen corresponding path program 15 times [2021-06-05 05:08:18,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:18,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393517468] [2021-06-05 05:08:18,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:18,849 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:18,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:18,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393517468] [2021-06-05 05:08:18,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393517468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:18,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997749205] [2021-06-05 05:08:18,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:18,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:08:18,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:18,872 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:08:18,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:19,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:19,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:08:19,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:19,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:19,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:19,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:38 [2021-06-05 05:08:19,420 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-06-05 05:08:19,453 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:19,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997749205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:19,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:19,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-05 05:08:19,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449011097] [2021-06-05 05:08:19,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:08:19,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:19,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:08:19,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:08:19,454 INFO L87 Difference]: Start difference. First operand 1019 states and 2414 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:20,963 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-06-05 05:08:21,526 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-06-05 05:08:21,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:21,746 INFO L93 Difference]: Finished difference Result 2304 states and 5623 transitions. [2021-06-05 05:08:21,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:08:21,747 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 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 30 [2021-06-05 05:08:21,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:21,749 INFO L225 Difference]: With dead ends: 2304 [2021-06-05 05:08:21,749 INFO L226 Difference]: Without dead ends: 2293 [2021-06-05 05:08:21,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 2274.2ms TimeCoverageRelationStatistics Valid=421, Invalid=2441, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:08:21,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2021-06-05 05:08:21,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 1032. [2021-06-05 05:08:21,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1031 states have (on average 2.372453928225024) internal successors, (2446), 1031 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:21,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 2446 transitions. [2021-06-05 05:08:21,760 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 2446 transitions. Word has length 30 [2021-06-05 05:08:21,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:21,760 INFO L482 AbstractCegarLoop]: Abstraction has 1032 states and 2446 transitions. [2021-06-05 05:08:21,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:21,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 2446 transitions. [2021-06-05 05:08:21,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:08:21,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:21,761 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:21,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:21,962 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:21,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:21,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1959580759, now seen corresponding path program 16 times [2021-06-05 05:08:21,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:21,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721524973] [2021-06-05 05:08:21,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:21,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:22,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:22,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721524973] [2021-06-05 05:08:22,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721524973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:22,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313283542] [2021-06-05 05:08:22,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:22,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:08:22,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:22,231 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:08:22,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:22,349 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 25 treesize of output 15 [2021-06-05 05:08:22,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:22,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:22,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:22,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:08:22,377 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:22,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313283542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:22,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:22,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 05:08:22,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409455140] [2021-06-05 05:08:22,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:08:22,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:22,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:08:22,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:08:22,378 INFO L87 Difference]: Start difference. First operand 1032 states and 2446 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:23,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:23,739 INFO L93 Difference]: Finished difference Result 2584 states and 6335 transitions. [2021-06-05 05:08:23,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:08:23,739 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:08:23,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:23,741 INFO L225 Difference]: With dead ends: 2584 [2021-06-05 05:08:23,741 INFO L226 Difference]: Without dead ends: 2564 [2021-06-05 05:08:23,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1146.5ms TimeCoverageRelationStatistics Valid=363, Invalid=1799, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:08:23,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2564 states. [2021-06-05 05:08:23,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2564 to 1022. [2021-06-05 05:08:23,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 2.3712047012732613) internal successors, (2421), 1021 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:23,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 2421 transitions. [2021-06-05 05:08:23,754 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 2421 transitions. Word has length 30 [2021-06-05 05:08:23,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:23,754 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 2421 transitions. [2021-06-05 05:08:23,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:23,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 2421 transitions. [2021-06-05 05:08:23,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:08:23,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:23,755 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:23,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:23,955 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:23,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:23,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1735151381, now seen corresponding path program 17 times [2021-06-05 05:08:23,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:23,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232473246] [2021-06-05 05:08:23,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:23,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:24,169 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:24,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:24,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232473246] [2021-06-05 05:08:24,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232473246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:24,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874488065] [2021-06-05 05:08:24,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:24,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:08:24,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:24,192 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:08:24,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:24,314 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 25 treesize of output 15 [2021-06-05 05:08:24,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:24,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:24,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:24,319 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:08:24,341 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:24,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874488065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:24,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:24,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 05:08:24,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724012233] [2021-06-05 05:08:24,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:08:24,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:24,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:08:24,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:08:24,342 INFO L87 Difference]: Start difference. First operand 1022 states and 2421 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:26,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:26,172 INFO L93 Difference]: Finished difference Result 2728 states and 6710 transitions. [2021-06-05 05:08:26,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:08:26,172 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:08:26,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:26,174 INFO L225 Difference]: With dead ends: 2728 [2021-06-05 05:08:26,174 INFO L226 Difference]: Without dead ends: 2718 [2021-06-05 05:08:26,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1353.1ms TimeCoverageRelationStatistics Valid=392, Invalid=2158, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:08:26,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2718 states. [2021-06-05 05:08:26,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2718 to 1022. [2021-06-05 05:08:26,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 2.3712047012732613) internal successors, (2421), 1021 states have internal predecessors, (2421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:26,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 2421 transitions. [2021-06-05 05:08:26,187 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 2421 transitions. Word has length 30 [2021-06-05 05:08:26,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:26,187 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 2421 transitions. [2021-06-05 05:08:26,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:26,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 2421 transitions. [2021-06-05 05:08:26,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:08:26,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:26,188 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:26,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:26,388 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:26,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:26,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1845604843, now seen corresponding path program 18 times [2021-06-05 05:08:26,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:26,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763881929] [2021-06-05 05:08:26,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:26,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:26,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:26,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:26,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763881929] [2021-06-05 05:08:26,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763881929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:26,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962384089] [2021-06-05 05:08:26,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:26,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:08:26,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:26,624 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:08:26,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:26,803 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:26,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-06-05 05:08:26,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:08:26,843 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 05:08:26,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:26,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:40 [2021-06-05 05:08:26,932 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:26,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962384089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:26,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:26,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 05:08:26,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087068198] [2021-06-05 05:08:26,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:08:26,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:26,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:08:26,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:08:26,933 INFO L87 Difference]: Start difference. First operand 1022 states and 2421 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:29,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:29,207 INFO L93 Difference]: Finished difference Result 2314 states and 5640 transitions. [2021-06-05 05:08:29,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:08:29,208 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 30 [2021-06-05 05:08:29,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:29,210 INFO L225 Difference]: With dead ends: 2314 [2021-06-05 05:08:29,210 INFO L226 Difference]: Without dead ends: 2305 [2021-06-05 05:08:29,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1554.6ms TimeCoverageRelationStatistics Valid=347, Invalid=3075, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:08:29,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2021-06-05 05:08:29,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 1021. [2021-06-05 05:08:29,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 2.3715686274509804) internal successors, (2419), 1020 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:29,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 2419 transitions. [2021-06-05 05:08:29,221 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 2419 transitions. Word has length 30 [2021-06-05 05:08:29,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:29,221 INFO L482 AbstractCegarLoop]: Abstraction has 1021 states and 2419 transitions. [2021-06-05 05:08:29,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:29,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 2419 transitions. [2021-06-05 05:08:29,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:08:29,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:29,222 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:29,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:29,438 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:29,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:29,438 INFO L82 PathProgramCache]: Analyzing trace with hash -462514351, now seen corresponding path program 19 times [2021-06-05 05:08:29,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:29,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120263665] [2021-06-05 05:08:29,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:29,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:29,650 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:29,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:29,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120263665] [2021-06-05 05:08:29,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120263665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:29,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518183819] [2021-06-05 05:08:29,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:29,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:29,671 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:08:29,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:29,823 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 25 treesize of output 15 [2021-06-05 05:08:29,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:29,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:29,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:29,827 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-06-05 05:08:29,846 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:29,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518183819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:29,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:29,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-06-05 05:08:29,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35294334] [2021-06-05 05:08:29,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:08:29,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:29,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:08:29,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:08:29,847 INFO L87 Difference]: Start difference. First operand 1021 states and 2419 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:31,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:31,384 INFO L93 Difference]: Finished difference Result 2365 states and 5774 transitions. [2021-06-05 05:08:31,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:08:31,384 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:08:31,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:31,386 INFO L225 Difference]: With dead ends: 2365 [2021-06-05 05:08:31,386 INFO L226 Difference]: Without dead ends: 2356 [2021-06-05 05:08:31,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 1010.3ms TimeCoverageRelationStatistics Valid=268, Invalid=1802, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:08:31,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-06-05 05:08:31,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 1036. [2021-06-05 05:08:31,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 2.373913043478261) internal successors, (2457), 1035 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:31,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 2457 transitions. [2021-06-05 05:08:31,398 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 2457 transitions. Word has length 30 [2021-06-05 05:08:31,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:31,398 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 2457 transitions. [2021-06-05 05:08:31,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:31,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 2457 transitions. [2021-06-05 05:08:31,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:08:31,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:31,399 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:31,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-05 05:08:31,613 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:31,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:31,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1155554699, now seen corresponding path program 20 times [2021-06-05 05:08:31,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:31,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537479763] [2021-06-05 05:08:31,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:31,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:31,831 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:31,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:31,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537479763] [2021-06-05 05:08:31,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537479763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:31,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085146451] [2021-06-05 05:08:31,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:31,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:08:31,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:31,854 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:08:31,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:31,980 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 25 treesize of output 15 [2021-06-05 05:08:31,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:31,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:31,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:31,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:08:32,007 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:32,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085146451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:32,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:32,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 05:08:32,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049211373] [2021-06-05 05:08:32,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:08:32,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:32,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:08:32,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:08:32,007 INFO L87 Difference]: Start difference. First operand 1036 states and 2457 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:33,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:33,529 INFO L93 Difference]: Finished difference Result 2424 states and 5947 transitions. [2021-06-05 05:08:33,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:08:33,529 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:08:33,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:33,531 INFO L225 Difference]: With dead ends: 2424 [2021-06-05 05:08:33,531 INFO L226 Difference]: Without dead ends: 2413 [2021-06-05 05:08:33,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1093.4ms TimeCoverageRelationStatistics Valid=302, Invalid=1768, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:08:33,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2021-06-05 05:08:33,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 1051. [2021-06-05 05:08:33,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 1050 states have (on average 2.375238095238095) internal successors, (2494), 1050 states have internal predecessors, (2494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:33,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 2494 transitions. [2021-06-05 05:08:33,543 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 2494 transitions. Word has length 30 [2021-06-05 05:08:33,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:33,543 INFO L482 AbstractCegarLoop]: Abstraction has 1051 states and 2494 transitions. [2021-06-05 05:08:33,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:33,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 2494 transitions. [2021-06-05 05:08:33,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:08:33,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:33,544 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:33,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:33,745 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:33,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:33,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1820757867, now seen corresponding path program 21 times [2021-06-05 05:08:33,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:33,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377943695] [2021-06-05 05:08:33,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:33,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:33,960 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:33,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:33,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377943695] [2021-06-05 05:08:33,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377943695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:33,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166203266] [2021-06-05 05:08:33,961 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:33,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:08:33,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:33,983 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:08:33,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:34,116 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 25 treesize of output 15 [2021-06-05 05:08:34,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:34,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:34,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:34,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:08:34,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:34,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166203266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:34,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:34,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 05:08:34,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363127469] [2021-06-05 05:08:34,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:08:34,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:34,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:08:34,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:08:34,143 INFO L87 Difference]: Start difference. First operand 1051 states and 2494 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:35,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:35,697 INFO L93 Difference]: Finished difference Result 2535 states and 6230 transitions. [2021-06-05 05:08:35,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:08:35,698 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:08:35,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:35,700 INFO L225 Difference]: With dead ends: 2535 [2021-06-05 05:08:35,700 INFO L226 Difference]: Without dead ends: 2515 [2021-06-05 05:08:35,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1200.6ms TimeCoverageRelationStatistics Valid=342, Invalid=1914, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:08:35,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2515 states. [2021-06-05 05:08:35,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2515 to 1039. [2021-06-05 05:08:35,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 1038 states have (on average 2.373795761078998) internal successors, (2464), 1038 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:35,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 2464 transitions. [2021-06-05 05:08:35,712 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 2464 transitions. Word has length 30 [2021-06-05 05:08:35,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:35,712 INFO L482 AbstractCegarLoop]: Abstraction has 1039 states and 2464 transitions. [2021-06-05 05:08:35,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:35,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 2464 transitions. [2021-06-05 05:08:35,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:08:35,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:35,713 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:35,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-06-05 05:08:35,913 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:35,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:35,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1475956119, now seen corresponding path program 22 times [2021-06-05 05:08:35,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:35,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619047331] [2021-06-05 05:08:35,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:35,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:36,132 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:36,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:36,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619047331] [2021-06-05 05:08:36,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619047331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:36,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268300918] [2021-06-05 05:08:36,132 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:36,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:08:36,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:36,154 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:08:36,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:36,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 05:08:36,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:36,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:36,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:36,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-06-05 05:08:36,329 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:36,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268300918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:36,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:36,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-06-05 05:08:36,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175876577] [2021-06-05 05:08:36,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:08:36,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:36,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:08:36,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:08:36,330 INFO L87 Difference]: Start difference. First operand 1039 states and 2464 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:37,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:37,931 INFO L93 Difference]: Finished difference Result 2343 states and 5723 transitions. [2021-06-05 05:08:37,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:08:37,932 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:08:37,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:37,934 INFO L225 Difference]: With dead ends: 2343 [2021-06-05 05:08:37,934 INFO L226 Difference]: Without dead ends: 2334 [2021-06-05 05:08:37,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1109.0ms TimeCoverageRelationStatistics Valid=286, Invalid=1970, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:08:37,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2334 states. [2021-06-05 05:08:37,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2334 to 1033. [2021-06-05 05:08:37,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 2.374031007751938) internal successors, (2450), 1032 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:37,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2450 transitions. [2021-06-05 05:08:37,946 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2450 transitions. Word has length 30 [2021-06-05 05:08:37,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:37,946 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 2450 transitions. [2021-06-05 05:08:37,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:37,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2450 transitions. [2021-06-05 05:08:37,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:08:37,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:37,947 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:38,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:38,147 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:38,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:38,147 INFO L82 PathProgramCache]: Analyzing trace with hash 309204733, now seen corresponding path program 23 times [2021-06-05 05:08:38,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:38,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132823710] [2021-06-05 05:08:38,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:38,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:38,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132823710] [2021-06-05 05:08:38,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132823710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:38,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236960275] [2021-06-05 05:08:38,394 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:38,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:08:38,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:38,416 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:08:38,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:38,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 05:08:38,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:38,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:38,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:38,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:08:38,562 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:38,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236960275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:38,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:38,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 05:08:38,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833697771] [2021-06-05 05:08:38,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:08:38,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:38,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:08:38,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:08:38,563 INFO L87 Difference]: Start difference. First operand 1033 states and 2450 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:39,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:39,709 INFO L93 Difference]: Finished difference Result 2466 states and 6019 transitions. [2021-06-05 05:08:39,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:08:39,710 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:08:39,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:39,712 INFO L225 Difference]: With dead ends: 2466 [2021-06-05 05:08:39,712 INFO L226 Difference]: Without dead ends: 2455 [2021-06-05 05:08:39,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 848.9ms TimeCoverageRelationStatistics Valid=265, Invalid=1217, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:08:39,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2021-06-05 05:08:39,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 1057. [2021-06-05 05:08:39,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1056 states have (on average 2.377840909090909) internal successors, (2511), 1056 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:39,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 2511 transitions. [2021-06-05 05:08:39,724 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 2511 transitions. Word has length 30 [2021-06-05 05:08:39,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:39,724 INFO L482 AbstractCegarLoop]: Abstraction has 1057 states and 2511 transitions. [2021-06-05 05:08:39,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:39,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 2511 transitions. [2021-06-05 05:08:39,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:08:39,725 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:39,725 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:39,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-06-05 05:08:39,925 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:39,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:39,925 INFO L82 PathProgramCache]: Analyzing trace with hash 2065605783, now seen corresponding path program 24 times [2021-06-05 05:08:39,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:39,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089646224] [2021-06-05 05:08:39,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:39,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:40,179 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:40,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:40,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089646224] [2021-06-05 05:08:40,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089646224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:40,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504514647] [2021-06-05 05:08:40,180 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:40,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:08:40,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:40,202 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:08:40,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:40,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 05:08:40,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:40,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:40,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:40,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:08:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:40,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504514647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:40,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:40,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 05:08:40,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841909510] [2021-06-05 05:08:40,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:08:40,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:40,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:08:40,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:08:40,350 INFO L87 Difference]: Start difference. First operand 1057 states and 2511 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:41,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:41,835 INFO L93 Difference]: Finished difference Result 2596 states and 6370 transitions. [2021-06-05 05:08:41,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:08:41,836 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:08:41,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:41,838 INFO L225 Difference]: With dead ends: 2596 [2021-06-05 05:08:41,838 INFO L226 Difference]: Without dead ends: 2576 [2021-06-05 05:08:41,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1048.5ms TimeCoverageRelationStatistics Valid=360, Invalid=1446, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:08:41,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2021-06-05 05:08:41,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 1045. [2021-06-05 05:08:41,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 2.375478927203065) internal successors, (2480), 1044 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:41,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 2480 transitions. [2021-06-05 05:08:41,851 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 2480 transitions. Word has length 30 [2021-06-05 05:08:41,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:41,851 INFO L482 AbstractCegarLoop]: Abstraction has 1045 states and 2480 transitions. [2021-06-05 05:08:41,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:41,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 2480 transitions. [2021-06-05 05:08:41,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:08:41,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:41,852 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:42,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable306 [2021-06-05 05:08:42,052 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:42,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:42,053 INFO L82 PathProgramCache]: Analyzing trace with hash -700407445, now seen corresponding path program 25 times [2021-06-05 05:08:42,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:42,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475464086] [2021-06-05 05:08:42,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:42,310 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:42,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:42,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475464086] [2021-06-05 05:08:42,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475464086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:42,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604043271] [2021-06-05 05:08:42,310 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:42,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:42,331 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:08:42,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:42,471 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 28 treesize of output 16 [2021-06-05 05:08:42,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:42,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:42,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:42,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:08:42,497 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:42,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604043271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:42,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:42,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:08:42,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606991808] [2021-06-05 05:08:42,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:08:42,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:42,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:08:42,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:08:42,497 INFO L87 Difference]: Start difference. First operand 1045 states and 2480 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:43,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:43,787 INFO L93 Difference]: Finished difference Result 2258 states and 5490 transitions. [2021-06-05 05:08:43,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:08:43,787 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-06-05 05:08:43,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:43,789 INFO L225 Difference]: With dead ends: 2258 [2021-06-05 05:08:43,789 INFO L226 Difference]: Without dead ends: 2235 [2021-06-05 05:08:43,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1024.0ms TimeCoverageRelationStatistics Valid=355, Invalid=1285, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:08:43,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2021-06-05 05:08:43,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 1036. [2021-06-05 05:08:43,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 2.373913043478261) internal successors, (2457), 1035 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:43,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 2457 transitions. [2021-06-05 05:08:43,801 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 2457 transitions. Word has length 30 [2021-06-05 05:08:43,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:43,801 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 2457 transitions. [2021-06-05 05:08:43,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:43,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 2457 transitions. [2021-06-05 05:08:43,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:08:43,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:43,802 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:44,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:44,005 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:44,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:44,005 INFO L82 PathProgramCache]: Analyzing trace with hash 373838239, now seen corresponding path program 26 times [2021-06-05 05:08:44,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:44,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355075013] [2021-06-05 05:08:44,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:44,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:44,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:44,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355075013] [2021-06-05 05:08:44,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355075013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:44,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782201577] [2021-06-05 05:08:44,292 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:44,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:08:44,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:44,313 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:08:44,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:44,463 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:44,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-06-05 05:08:44,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:08:44,504 INFO L628 ElimStorePlain]: treesize reduction 8, result has 87.3 percent of original size [2021-06-05 05:08:44,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:44,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:55 [2021-06-05 05:08:44,637 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:44,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782201577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:44,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:44,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 05:08:44,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369805859] [2021-06-05 05:08:44,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:08:44,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:44,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:08:44,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:08:44,638 INFO L87 Difference]: Start difference. First operand 1036 states and 2457 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:46,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:46,389 INFO L93 Difference]: Finished difference Result 2392 states and 5841 transitions. [2021-06-05 05:08:46,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:08:46,389 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:08:46,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:46,391 INFO L225 Difference]: With dead ends: 2392 [2021-06-05 05:08:46,392 INFO L226 Difference]: Without dead ends: 2381 [2021-06-05 05:08:46,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1445.3ms TimeCoverageRelationStatistics Valid=407, Invalid=1849, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:08:46,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2021-06-05 05:08:46,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 1057. [2021-06-05 05:08:46,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1056 states have (on average 2.375) internal successors, (2508), 1056 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:46,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 2508 transitions. [2021-06-05 05:08:46,403 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 2508 transitions. Word has length 30 [2021-06-05 05:08:46,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:46,403 INFO L482 AbstractCegarLoop]: Abstraction has 1057 states and 2508 transitions. [2021-06-05 05:08:46,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:46,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 2508 transitions. [2021-06-05 05:08:46,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:08:46,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:46,404 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:46,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2021-06-05 05:08:46,605 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:46,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:46,605 INFO L82 PathProgramCache]: Analyzing trace with hash 2130239289, now seen corresponding path program 27 times [2021-06-05 05:08:46,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:46,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482255008] [2021-06-05 05:08:46,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:46,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:46,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:46,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:46,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482255008] [2021-06-05 05:08:46,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482255008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:46,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686705649] [2021-06-05 05:08:46,873 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:46,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:08:46,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:46,895 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:08:46,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:47,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:47,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:08:47,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:47,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:47,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:47,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:38 [2021-06-05 05:08:47,416 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:47,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686705649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:47,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:47,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-05 05:08:47,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224405936] [2021-06-05 05:08:47,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:08:47,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:47,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:08:47,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:08:47,417 INFO L87 Difference]: Start difference. First operand 1057 states and 2508 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:48,070 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-06-05 05:08:49,025 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-06-05 05:08:50,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:50,129 INFO L93 Difference]: Finished difference Result 2521 states and 6168 transitions. [2021-06-05 05:08:50,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:08:50,130 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 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 30 [2021-06-05 05:08:50,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:50,132 INFO L225 Difference]: With dead ends: 2521 [2021-06-05 05:08:50,132 INFO L226 Difference]: Without dead ends: 2508 [2021-06-05 05:08:50,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 2537.9ms TimeCoverageRelationStatistics Valid=538, Invalid=2768, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:08:50,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2508 states. [2021-06-05 05:08:50,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2508 to 1053. [2021-06-05 05:08:50,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 1052 states have (on average 2.3745247148288975) internal successors, (2498), 1052 states have internal predecessors, (2498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:50,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 2498 transitions. [2021-06-05 05:08:50,144 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 2498 transitions. Word has length 30 [2021-06-05 05:08:50,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:50,144 INFO L482 AbstractCegarLoop]: Abstraction has 1053 states and 2498 transitions. [2021-06-05 05:08:50,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:50,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 2498 transitions. [2021-06-05 05:08:50,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:08:50,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:50,145 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:50,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:50,360 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:50,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:50,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1212289099, now seen corresponding path program 28 times [2021-06-05 05:08:50,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:50,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819913681] [2021-06-05 05:08:50,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:50,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:50,631 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:50,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:50,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819913681] [2021-06-05 05:08:50,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819913681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:50,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747355731] [2021-06-05 05:08:50,631 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:50,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:08:50,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:50,653 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:08:50,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:50,777 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 25 treesize of output 15 [2021-06-05 05:08:50,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:50,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:50,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:50,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:08:50,820 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:50,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747355731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:50,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:50,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:08:50,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686272327] [2021-06-05 05:08:50,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:08:50,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:50,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:08:50,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:08:50,821 INFO L87 Difference]: Start difference. First operand 1053 states and 2498 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:52,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:52,919 INFO L93 Difference]: Finished difference Result 2872 states and 7002 transitions. [2021-06-05 05:08:52,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:08:52,919 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-06-05 05:08:52,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:52,922 INFO L225 Difference]: With dead ends: 2872 [2021-06-05 05:08:52,922 INFO L226 Difference]: Without dead ends: 2854 [2021-06-05 05:08:52,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 1617.0ms TimeCoverageRelationStatistics Valid=613, Invalid=2693, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:08:52,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-06-05 05:08:52,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 1048. [2021-06-05 05:08:52,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 2.373447946513849) internal successors, (2485), 1047 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:52,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 2485 transitions. [2021-06-05 05:08:52,935 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 2485 transitions. Word has length 30 [2021-06-05 05:08:52,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:52,935 INFO L482 AbstractCegarLoop]: Abstraction has 1048 states and 2485 transitions. [2021-06-05 05:08:52,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:52,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 2485 transitions. [2021-06-05 05:08:52,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:08:52,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:52,936 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:53,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-06-05 05:08:53,136 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:53,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:53,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1530004133, now seen corresponding path program 29 times [2021-06-05 05:08:53,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:53,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570676461] [2021-06-05 05:08:53,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:53,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:53,368 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:53,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:53,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570676461] [2021-06-05 05:08:53,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570676461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:53,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069375681] [2021-06-05 05:08:53,369 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:53,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:08:53,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:53,390 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:08:53,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:53,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 05:08:53,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:53,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:53,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:53,519 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:08:53,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:53,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069375681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:53,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:53,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 05:08:53,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903866900] [2021-06-05 05:08:53,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:08:53,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:53,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:08:53,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:08:53,544 INFO L87 Difference]: Start difference. First operand 1048 states and 2485 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:55,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:55,352 INFO L93 Difference]: Finished difference Result 2791 states and 6868 transitions. [2021-06-05 05:08:55,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:08:55,353 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:08:55,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:55,355 INFO L225 Difference]: With dead ends: 2791 [2021-06-05 05:08:55,356 INFO L226 Difference]: Without dead ends: 2776 [2021-06-05 05:08:55,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 1372.4ms TimeCoverageRelationStatistics Valid=418, Invalid=2132, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:08:55,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-06-05 05:08:55,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 1039. [2021-06-05 05:08:55,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 1038 states have (on average 2.373795761078998) internal successors, (2464), 1038 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:55,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 2464 transitions. [2021-06-05 05:08:55,369 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 2464 transitions. Word has length 30 [2021-06-05 05:08:55,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:55,369 INFO L482 AbstractCegarLoop]: Abstraction has 1039 states and 2464 transitions. [2021-06-05 05:08:55,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:55,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 2464 transitions. [2021-06-05 05:08:55,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:08:55,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:55,370 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:55,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:55,570 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:55,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:55,571 INFO L82 PathProgramCache]: Analyzing trace with hash -2050752091, now seen corresponding path program 30 times [2021-06-05 05:08:55,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:55,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516319539] [2021-06-05 05:08:55,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:55,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:55,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:55,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516319539] [2021-06-05 05:08:55,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516319539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:55,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696263523] [2021-06-05 05:08:55,799 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:55,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:08:55,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:55,822 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:08:55,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:56,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:56,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-06-05 05:08:56,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:08:56,038 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 05:08:56,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:56,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:40 [2021-06-05 05:08:56,131 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:56,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696263523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:56,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:56,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 05:08:56,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338457834] [2021-06-05 05:08:56,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:08:56,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:56,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:08:56,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:08:56,132 INFO L87 Difference]: Start difference. First operand 1039 states and 2464 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:59,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:59,148 INFO L93 Difference]: Finished difference Result 2522 states and 6156 transitions. [2021-06-05 05:08:59,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 05:08:59,149 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 30 [2021-06-05 05:08:59,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:59,151 INFO L225 Difference]: With dead ends: 2522 [2021-06-05 05:08:59,151 INFO L226 Difference]: Without dead ends: 2513 [2021-06-05 05:08:59,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 2148.4ms TimeCoverageRelationStatistics Valid=475, Invalid=4637, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 05:08:59,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2021-06-05 05:08:59,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 1041. [2021-06-05 05:08:59,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1041 states, 1040 states have (on average 2.373076923076923) internal successors, (2468), 1040 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:59,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 2468 transitions. [2021-06-05 05:08:59,163 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 2468 transitions. Word has length 30 [2021-06-05 05:08:59,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:59,163 INFO L482 AbstractCegarLoop]: Abstraction has 1041 states and 2468 transitions. [2021-06-05 05:08:59,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:59,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 2468 transitions. [2021-06-05 05:08:59,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:08:59,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:59,164 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:59,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-05 05:08:59,365 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:59,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:59,365 INFO L82 PathProgramCache]: Analyzing trace with hash 513543889, now seen corresponding path program 31 times [2021-06-05 05:08:59,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:59,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320131897] [2021-06-05 05:08:59,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:59,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:59,566 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:59,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:59,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320131897] [2021-06-05 05:08:59,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320131897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:59,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596510504] [2021-06-05 05:08:59,567 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:59,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:59,588 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:08:59,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:59,715 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 25 treesize of output 15 [2021-06-05 05:08:59,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:59,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:59,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:59,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:08:59,741 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:59,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596510504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:59,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:59,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 05:08:59,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354747222] [2021-06-05 05:08:59,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:08:59,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:59,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:08:59,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:08:59,741 INFO L87 Difference]: Start difference. First operand 1041 states and 2468 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:00,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:00,579 INFO L93 Difference]: Finished difference Result 2556 states and 6245 transitions. [2021-06-05 05:09:00,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:09:00,579 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:09:00,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:00,581 INFO L225 Difference]: With dead ends: 2556 [2021-06-05 05:09:00,581 INFO L226 Difference]: Without dead ends: 2545 [2021-06-05 05:09:00,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 698.0ms TimeCoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:09:00,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2545 states. [2021-06-05 05:09:00,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2545 to 1076. [2021-06-05 05:09:00,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 1075 states have (on average 2.3813953488372093) internal successors, (2560), 1075 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:00,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 2560 transitions. [2021-06-05 05:09:00,594 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 2560 transitions. Word has length 30 [2021-06-05 05:09:00,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:00,594 INFO L482 AbstractCegarLoop]: Abstraction has 1076 states and 2560 transitions. [2021-06-05 05:09:00,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:00,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 2560 transitions. [2021-06-05 05:09:00,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:09:00,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:00,595 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:00,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-06-05 05:09:00,796 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:00,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:00,796 INFO L82 PathProgramCache]: Analyzing trace with hash -2025022357, now seen corresponding path program 32 times [2021-06-05 05:09:00,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:00,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681272283] [2021-06-05 05:09:00,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:00,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:00,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:00,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:00,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681272283] [2021-06-05 05:09:00,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681272283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:00,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614260804] [2021-06-05 05:09:00,991 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:01,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:09:01,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:01,014 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:09:01,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:01,193 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:01,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 31 [2021-06-05 05:09:01,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:09:01,237 INFO L628 ElimStorePlain]: treesize reduction 6, result has 90.3 percent of original size [2021-06-05 05:09:01,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:01,238 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:56 [2021-06-05 05:09:01,327 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:01,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614260804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:01,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:01,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 05:09:01,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711188214] [2021-06-05 05:09:01,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:09:01,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:01,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:09:01,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:09:01,328 INFO L87 Difference]: Start difference. First operand 1076 states and 2560 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:02,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:02,526 INFO L93 Difference]: Finished difference Result 2647 states and 6512 transitions. [2021-06-05 05:09:02,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:09:02,526 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:09:02,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:02,528 INFO L225 Difference]: With dead ends: 2647 [2021-06-05 05:09:02,528 INFO L226 Difference]: Without dead ends: 2635 [2021-06-05 05:09:02,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1042.1ms TimeCoverageRelationStatistics Valid=371, Invalid=1351, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:09:02,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2021-06-05 05:09:02,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 1107. [2021-06-05 05:09:02,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 1106 states have (on average 2.387884267631103) internal successors, (2641), 1106 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:02,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 2641 transitions. [2021-06-05 05:09:02,541 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 2641 transitions. Word has length 30 [2021-06-05 05:09:02,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:02,541 INFO L482 AbstractCegarLoop]: Abstraction has 1107 states and 2641 transitions. [2021-06-05 05:09:02,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:02,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 2641 transitions. [2021-06-05 05:09:02,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:09:02,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:02,542 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:02,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-05 05:09:02,742 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:02,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:02,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1351994749, now seen corresponding path program 33 times [2021-06-05 05:09:02,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:02,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048023354] [2021-06-05 05:09:02,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:02,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:02,946 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:02,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:02,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048023354] [2021-06-05 05:09:02,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048023354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:02,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435265218] [2021-06-05 05:09:02,946 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:02,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:09:02,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:02,968 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:09:02,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:03,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 05:09:03,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:03,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:03,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:03,096 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:09:03,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:03,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435265218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:03,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:03,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:09:03,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787990789] [2021-06-05 05:09:03,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:09:03,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:03,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:09:03,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:09:03,131 INFO L87 Difference]: Start difference. First operand 1107 states and 2641 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:04,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:04,229 INFO L93 Difference]: Finished difference Result 2939 states and 7188 transitions. [2021-06-05 05:09:04,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:09:04,230 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-06-05 05:09:04,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:04,232 INFO L225 Difference]: With dead ends: 2939 [2021-06-05 05:09:04,232 INFO L226 Difference]: Without dead ends: 2917 [2021-06-05 05:09:04,232 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 958.1ms TimeCoverageRelationStatistics Valid=417, Invalid=1563, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:09:04,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2021-06-05 05:09:04,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 1060. [2021-06-05 05:09:04,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 1059 states have (on average 2.376770538243626) internal successors, (2517), 1059 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:04,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 2517 transitions. [2021-06-05 05:09:04,246 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 2517 transitions. Word has length 30 [2021-06-05 05:09:04,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:04,246 INFO L482 AbstractCegarLoop]: Abstraction has 1060 states and 2517 transitions. [2021-06-05 05:09:04,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:04,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 2517 transitions. [2021-06-05 05:09:04,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:09:04,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:04,247 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:04,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable339 [2021-06-05 05:09:04,447 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:04,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:04,447 INFO L82 PathProgramCache]: Analyzing trace with hash 698605027, now seen corresponding path program 34 times [2021-06-05 05:09:04,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:04,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865228858] [2021-06-05 05:09:04,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:04,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:04,646 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:04,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:04,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865228858] [2021-06-05 05:09:04,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865228858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:04,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464106425] [2021-06-05 05:09:04,646 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:04,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:09:04,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:04,668 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:09:04,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:04,813 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 28 treesize of output 16 [2021-06-05 05:09:04,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:04,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:04,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:04,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:09:04,842 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:04,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464106425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:04,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:04,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:09:04,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428866824] [2021-06-05 05:09:04,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:09:04,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:04,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:09:04,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:09:04,843 INFO L87 Difference]: Start difference. First operand 1060 states and 2517 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:05,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:05,806 INFO L93 Difference]: Finished difference Result 2435 states and 5897 transitions. [2021-06-05 05:09:05,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:09:05,807 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-06-05 05:09:05,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:05,809 INFO L225 Difference]: With dead ends: 2435 [2021-06-05 05:09:05,809 INFO L226 Difference]: Without dead ends: 2412 [2021-06-05 05:09:05,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 785.8ms TimeCoverageRelationStatistics Valid=318, Invalid=1088, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:09:05,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-06-05 05:09:05,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 1045. [2021-06-05 05:09:05,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 2.3726053639846745) internal successors, (2477), 1044 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:05,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 2477 transitions. [2021-06-05 05:09:05,826 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 2477 transitions. Word has length 30 [2021-06-05 05:09:05,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:05,826 INFO L482 AbstractCegarLoop]: Abstraction has 1045 states and 2477 transitions. [2021-06-05 05:09:05,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:05,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 2477 transitions. [2021-06-05 05:09:05,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:09:05,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:05,827 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:06,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:06,028 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:06,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:06,028 INFO L82 PathProgramCache]: Analyzing trace with hash -614639997, now seen corresponding path program 35 times [2021-06-05 05:09:06,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:06,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17655124] [2021-06-05 05:09:06,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:06,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:06,231 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:06,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:06,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17655124] [2021-06-05 05:09:06,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17655124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:06,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248359360] [2021-06-05 05:09:06,231 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:06,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:09:06,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:06,253 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:09:06,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:06,401 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 28 treesize of output 16 [2021-06-05 05:09:06,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:06,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:06,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:06,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:09:06,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:06,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248359360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:06,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:06,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:09:06,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734572095] [2021-06-05 05:09:06,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:09:06,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:06,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:09:06,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:09:06,425 INFO L87 Difference]: Start difference. First operand 1045 states and 2477 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:07,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:07,194 INFO L93 Difference]: Finished difference Result 2319 states and 5633 transitions. [2021-06-05 05:09:07,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:09:07,195 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-06-05 05:09:07,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:07,197 INFO L225 Difference]: With dead ends: 2319 [2021-06-05 05:09:07,197 INFO L226 Difference]: Without dead ends: 2309 [2021-06-05 05:09:07,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 667.2ms TimeCoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:09:07,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2021-06-05 05:09:07,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 1042. [2021-06-05 05:09:07,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1041 states have (on average 2.372718539865514) internal successors, (2470), 1041 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:07,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 2470 transitions. [2021-06-05 05:09:07,209 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 2470 transitions. Word has length 30 [2021-06-05 05:09:07,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:07,209 INFO L482 AbstractCegarLoop]: Abstraction has 1042 states and 2470 transitions. [2021-06-05 05:09:07,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:07,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 2470 transitions. [2021-06-05 05:09:07,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:09:07,210 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:07,210 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:07,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:07,411 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:07,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:07,411 INFO L82 PathProgramCache]: Analyzing trace with hash 198282265, now seen corresponding path program 36 times [2021-06-05 05:09:07,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:07,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565702546] [2021-06-05 05:09:07,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:07,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:07,648 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:07,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:07,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565702546] [2021-06-05 05:09:07,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565702546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:07,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467752899] [2021-06-05 05:09:07,648 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:07,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:09:07,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:07,671 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:09:07,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:07,842 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:07,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 31 [2021-06-05 05:09:07,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:09:07,881 INFO L628 ElimStorePlain]: treesize reduction 8, result has 86.7 percent of original size [2021-06-05 05:09:07,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:07,882 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:52 [2021-06-05 05:09:07,972 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:07,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467752899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:07,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:07,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 05:09:07,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257501672] [2021-06-05 05:09:07,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:09:07,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:07,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:09:07,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:09:07,973 INFO L87 Difference]: Start difference. First operand 1042 states and 2470 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:09,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:09,360 INFO L93 Difference]: Finished difference Result 2426 states and 5913 transitions. [2021-06-05 05:09:09,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:09:09,361 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:09:09,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:09,363 INFO L225 Difference]: With dead ends: 2426 [2021-06-05 05:09:09,363 INFO L226 Difference]: Without dead ends: 2415 [2021-06-05 05:09:09,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1172.0ms TimeCoverageRelationStatistics Valid=355, Invalid=1537, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:09:09,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-06-05 05:09:09,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1067. [2021-06-05 05:09:09,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1066 states have (on average 2.376172607879925) internal successors, (2533), 1066 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:09,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 2533 transitions. [2021-06-05 05:09:09,375 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 2533 transitions. Word has length 30 [2021-06-05 05:09:09,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:09,375 INFO L482 AbstractCegarLoop]: Abstraction has 1067 states and 2533 transitions. [2021-06-05 05:09:09,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:09,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 2533 transitions. [2021-06-05 05:09:09,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:09:09,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:09,376 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:09,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-06-05 05:09:09,576 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:09,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:09,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1954683315, now seen corresponding path program 37 times [2021-06-05 05:09:09,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:09,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666338516] [2021-06-05 05:09:09,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:09,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:09,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:09,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:09,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666338516] [2021-06-05 05:09:09,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666338516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:09,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130728636] [2021-06-05 05:09:09,814 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:09,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:09,836 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:09:09,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:09,955 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 25 treesize of output 15 [2021-06-05 05:09:09,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:09,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:09,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:09,960 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:09:09,982 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:09,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130728636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:09,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:09,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 05:09:09,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485564978] [2021-06-05 05:09:09,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:09:09,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:09,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:09:09,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:09:09,982 INFO L87 Difference]: Start difference. First operand 1067 states and 2533 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:11,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:11,091 INFO L93 Difference]: Finished difference Result 2651 states and 6517 transitions. [2021-06-05 05:09:11,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:09:11,091 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:09:11,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:11,094 INFO L225 Difference]: With dead ends: 2651 [2021-06-05 05:09:11,094 INFO L226 Difference]: Without dead ends: 2631 [2021-06-05 05:09:11,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 944.8ms TimeCoverageRelationStatistics Valid=342, Invalid=1380, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:09:11,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2021-06-05 05:09:11,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 1067. [2021-06-05 05:09:11,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1066 states have (on average 2.376172607879925) internal successors, (2533), 1066 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:11,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 2533 transitions. [2021-06-05 05:09:11,106 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 2533 transitions. Word has length 30 [2021-06-05 05:09:11,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:11,106 INFO L482 AbstractCegarLoop]: Abstraction has 1067 states and 2533 transitions. [2021-06-05 05:09:11,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:11,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 2533 transitions. [2021-06-05 05:09:11,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:09:11,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:11,107 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:11,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:11,307 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:11,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:11,308 INFO L82 PathProgramCache]: Analyzing trace with hash -811329913, now seen corresponding path program 38 times [2021-06-05 05:09:11,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:11,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965644450] [2021-06-05 05:09:11,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:11,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:11,551 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:11,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:11,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965644450] [2021-06-05 05:09:11,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965644450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:11,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892755546] [2021-06-05 05:09:11,551 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:11,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:09:11,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:11,586 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:09:11,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:11,780 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:11,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 05:09:11,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:11,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:11,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:11,795 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:32 [2021-06-05 05:09:11,869 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:11,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892755546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:11,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:11,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-05 05:09:11,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617279994] [2021-06-05 05:09:11,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:09:11,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:11,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:09:11,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:09:11,870 INFO L87 Difference]: Start difference. First operand 1067 states and 2533 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:13,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:13,559 INFO L93 Difference]: Finished difference Result 2587 states and 6285 transitions. [2021-06-05 05:09:13,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:09:13,559 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 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 30 [2021-06-05 05:09:13,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:13,561 INFO L225 Difference]: With dead ends: 2587 [2021-06-05 05:09:13,561 INFO L226 Difference]: Without dead ends: 2567 [2021-06-05 05:09:13,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1535.6ms TimeCoverageRelationStatistics Valid=573, Invalid=2079, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:09:13,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2021-06-05 05:09:13,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 1058. [2021-06-05 05:09:13,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1057 states have (on average 2.3746452223273415) internal successors, (2510), 1057 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:13,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 2510 transitions. [2021-06-05 05:09:13,573 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 2510 transitions. Word has length 30 [2021-06-05 05:09:13,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:13,573 INFO L482 AbstractCegarLoop]: Abstraction has 1058 states and 2510 transitions. [2021-06-05 05:09:13,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:13,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 2510 transitions. [2021-06-05 05:09:13,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:09:13,574 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:13,574 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:13,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-06-05 05:09:13,775 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:13,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:13,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1128175109, now seen corresponding path program 39 times [2021-06-05 05:09:13,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:13,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102577720] [2021-06-05 05:09:13,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:13,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:14,024 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:14,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:14,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102577720] [2021-06-05 05:09:14,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102577720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:14,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708487121] [2021-06-05 05:09:14,024 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:14,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:09:14,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:14,047 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:09:14,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:14,188 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:14,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:09:14,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:14,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:14,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:14,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:38 [2021-06-05 05:09:14,594 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:14,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708487121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:14,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:14,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-05 05:09:14,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847872442] [2021-06-05 05:09:14,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:09:14,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:14,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:09:14,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:09:14,595 INFO L87 Difference]: Start difference. First operand 1058 states and 2510 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:15,145 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-06-05 05:09:15,988 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-06-05 05:09:16,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:16,900 INFO L93 Difference]: Finished difference Result 2375 states and 5793 transitions. [2021-06-05 05:09:16,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:09:16,901 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 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 30 [2021-06-05 05:09:16,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:16,903 INFO L225 Difference]: With dead ends: 2375 [2021-06-05 05:09:16,903 INFO L226 Difference]: Without dead ends: 2364 [2021-06-05 05:09:16,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 2247.6ms TimeCoverageRelationStatistics Valid=452, Invalid=2518, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:09:16,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2021-06-05 05:09:16,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 1071. [2021-06-05 05:09:16,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 1070 states have (on average 2.3757009345794393) internal successors, (2542), 1070 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:16,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 2542 transitions. [2021-06-05 05:09:16,914 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 2542 transitions. Word has length 30 [2021-06-05 05:09:16,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:16,915 INFO L482 AbstractCegarLoop]: Abstraction has 1071 states and 2542 transitions. [2021-06-05 05:09:16,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:16,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 2542 transitions. [2021-06-05 05:09:16,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:09:16,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:16,916 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:17,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-06-05 05:09:17,116 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:17,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:17,116 INFO L82 PathProgramCache]: Analyzing trace with hash 628225941, now seen corresponding path program 40 times [2021-06-05 05:09:17,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:17,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931243492] [2021-06-05 05:09:17,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:17,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:17,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:17,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:17,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931243492] [2021-06-05 05:09:17,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931243492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:17,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129941427] [2021-06-05 05:09:17,367 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:17,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:09:17,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:17,390 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:09:17,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:17,517 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 25 treesize of output 15 [2021-06-05 05:09:17,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:17,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:17,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:17,522 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:09:17,545 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:17,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129941427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:17,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:17,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 05:09:17,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756130853] [2021-06-05 05:09:17,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:09:17,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:17,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:09:17,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:09:17,546 INFO L87 Difference]: Start difference. First operand 1071 states and 2542 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:19,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:19,072 INFO L93 Difference]: Finished difference Result 2674 states and 6561 transitions. [2021-06-05 05:09:19,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:09:19,072 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:09:19,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:19,074 INFO L225 Difference]: With dead ends: 2674 [2021-06-05 05:09:19,074 INFO L226 Difference]: Without dead ends: 2654 [2021-06-05 05:09:19,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1268.6ms TimeCoverageRelationStatistics Valid=434, Invalid=2016, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:09:19,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2654 states. [2021-06-05 05:09:19,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2654 to 1062. [2021-06-05 05:09:19,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 1061 states have (on average 2.3741753063147972) internal successors, (2519), 1061 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:19,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 2519 transitions. [2021-06-05 05:09:19,088 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 2519 transitions. Word has length 30 [2021-06-05 05:09:19,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:19,088 INFO L482 AbstractCegarLoop]: Abstraction has 1062 states and 2519 transitions. [2021-06-05 05:09:19,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:19,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 2519 transitions. [2021-06-05 05:09:19,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:09:19,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:19,089 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:19,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-06-05 05:09:19,289 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:19,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:19,289 INFO L82 PathProgramCache]: Analyzing trace with hash 27990785, now seen corresponding path program 41 times [2021-06-05 05:09:19,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:19,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723591337] [2021-06-05 05:09:19,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:19,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:19,505 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:19,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:19,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723591337] [2021-06-05 05:09:19,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723591337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:19,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969667495] [2021-06-05 05:09:19,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:19,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:09:19,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:19,528 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:09:19,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:19,650 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 25 treesize of output 15 [2021-06-05 05:09:19,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:19,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:19,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:19,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:09:19,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:19,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969667495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:19,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:19,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 05:09:19,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234751563] [2021-06-05 05:09:19,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:09:19,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:19,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:09:19,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:09:19,679 INFO L87 Difference]: Start difference. First operand 1062 states and 2519 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:21,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:21,353 INFO L93 Difference]: Finished difference Result 2797 states and 6881 transitions. [2021-06-05 05:09:21,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:09:21,353 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:09:21,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:21,356 INFO L225 Difference]: With dead ends: 2797 [2021-06-05 05:09:21,356 INFO L226 Difference]: Without dead ends: 2782 [2021-06-05 05:09:21,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 1336.6ms TimeCoverageRelationStatistics Valid=415, Invalid=2135, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:09:21,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2782 states. [2021-06-05 05:09:21,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2782 to 1055. [2021-06-05 05:09:21,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1054 states have (on average 2.3747628083491463) internal successors, (2503), 1054 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:21,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 2503 transitions. [2021-06-05 05:09:21,368 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 2503 transitions. Word has length 30 [2021-06-05 05:09:21,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:21,368 INFO L482 AbstractCegarLoop]: Abstraction has 1055 states and 2503 transitions. [2021-06-05 05:09:21,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:21,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 2503 transitions. [2021-06-05 05:09:21,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:09:21,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:21,369 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:21,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-05 05:09:21,570 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:21,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:21,570 INFO L82 PathProgramCache]: Analyzing trace with hash 742201857, now seen corresponding path program 42 times [2021-06-05 05:09:21,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:21,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975809717] [2021-06-05 05:09:21,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:21,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:21,784 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:21,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:21,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975809717] [2021-06-05 05:09:21,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975809717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:21,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731134549] [2021-06-05 05:09:21,784 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:21,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:09:21,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:21,807 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:09:21,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:21,955 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 25 treesize of output 15 [2021-06-05 05:09:21,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:21,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:21,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:21,959 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-06-05 05:09:21,979 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:21,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731134549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:21,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:21,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-06-05 05:09:21,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67848233] [2021-06-05 05:09:21,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:09:21,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:21,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:09:21,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:09:21,980 INFO L87 Difference]: Start difference. First operand 1055 states and 2503 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:23,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:23,738 INFO L93 Difference]: Finished difference Result 2352 states and 5740 transitions. [2021-06-05 05:09:23,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:09:23,739 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:09:23,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:23,741 INFO L225 Difference]: With dead ends: 2352 [2021-06-05 05:09:23,741 INFO L226 Difference]: Without dead ends: 2343 [2021-06-05 05:09:23,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 957.4ms TimeCoverageRelationStatistics Valid=268, Invalid=1802, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:09:23,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2343 states. [2021-06-05 05:09:23,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2343 to 1054. [2021-06-05 05:09:23,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 1053 states have (on average 2.375118708452042) internal successors, (2501), 1053 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:23,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 2501 transitions. [2021-06-05 05:09:23,753 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 2501 transitions. Word has length 30 [2021-06-05 05:09:23,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:23,753 INFO L482 AbstractCegarLoop]: Abstraction has 1054 states and 2501 transitions. [2021-06-05 05:09:23,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:23,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 2501 transitions. [2021-06-05 05:09:23,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:09:23,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:23,754 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:23,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-06-05 05:09:23,954 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:23,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:23,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1134723779, now seen corresponding path program 25 times [2021-06-05 05:09:23,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:23,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136918918] [2021-06-05 05:09:23,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:24,203 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:24,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:24,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136918918] [2021-06-05 05:09:24,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136918918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:24,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409231481] [2021-06-05 05:09:24,203 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:24,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:24,225 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:09:24,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:24,389 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-05 05:09:24,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 44 [2021-06-05 05:09:24,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:24,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:24,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:24,393 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:11 [2021-06-05 05:09:24,414 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:24,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409231481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:24,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:24,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:09:24,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482850314] [2021-06-05 05:09:24,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:09:24,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:24,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:09:24,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:09:24,415 INFO L87 Difference]: Start difference. First operand 1054 states and 2501 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:26,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:26,123 INFO L93 Difference]: Finished difference Result 2280 states and 5531 transitions. [2021-06-05 05:09:26,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:09:26,123 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-06-05 05:09:26,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:26,126 INFO L225 Difference]: With dead ends: 2280 [2021-06-05 05:09:26,126 INFO L226 Difference]: Without dead ends: 2260 [2021-06-05 05:09:26,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 1277.2ms TimeCoverageRelationStatistics Valid=444, Invalid=2208, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:09:26,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2021-06-05 05:09:26,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 1049. [2021-06-05 05:09:26,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1048 states have (on average 2.3759541984732824) internal successors, (2490), 1048 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:26,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 2490 transitions. [2021-06-05 05:09:26,137 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 2490 transitions. Word has length 30 [2021-06-05 05:09:26,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:26,137 INFO L482 AbstractCegarLoop]: Abstraction has 1049 states and 2490 transitions. [2021-06-05 05:09:26,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:26,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 2490 transitions. [2021-06-05 05:09:26,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:09:26,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:26,138 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:26,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:26,341 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:26,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:26,341 INFO L82 PathProgramCache]: Analyzing trace with hash 84697641, now seen corresponding path program 26 times [2021-06-05 05:09:26,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:26,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624904265] [2021-06-05 05:09:26,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:26,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:26,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:26,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624904265] [2021-06-05 05:09:26,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624904265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:26,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841590426] [2021-06-05 05:09:26,575 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:26,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:09:26,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:26,597 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:09:26,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:26,785 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:26,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-06-05 05:09:26,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:26,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:26,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:26,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-06-05 05:09:26,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:26,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841590426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:26,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:26,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 05:09:26,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160466600] [2021-06-05 05:09:26,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:09:26,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:26,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:09:26,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:09:26,876 INFO L87 Difference]: Start difference. First operand 1049 states and 2490 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:29,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:29,091 INFO L93 Difference]: Finished difference Result 2513 states and 6135 transitions. [2021-06-05 05:09:29,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 05:09:29,091 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:09:29,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:29,093 INFO L225 Difference]: With dead ends: 2513 [2021-06-05 05:09:29,093 INFO L226 Difference]: Without dead ends: 2484 [2021-06-05 05:09:29,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1832.4ms TimeCoverageRelationStatistics Valid=579, Invalid=2843, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:09:29,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2021-06-05 05:09:29,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 1031. [2021-06-05 05:09:29,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1030 states have (on average 2.376699029126214) internal successors, (2448), 1030 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:29,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 2448 transitions. [2021-06-05 05:09:29,105 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 2448 transitions. Word has length 30 [2021-06-05 05:09:29,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:29,105 INFO L482 AbstractCegarLoop]: Abstraction has 1031 states and 2448 transitions. [2021-06-05 05:09:29,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:29,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 2448 transitions. [2021-06-05 05:09:29,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:09:29,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:29,106 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:29,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:29,306 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:29,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:29,306 INFO L82 PathProgramCache]: Analyzing trace with hash -961089049, now seen corresponding path program 43 times [2021-06-05 05:09:29,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:29,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682357874] [2021-06-05 05:09:29,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:29,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:29,533 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:29,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:29,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682357874] [2021-06-05 05:09:29,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682357874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:29,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464857204] [2021-06-05 05:09:29,534 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:29,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:29,557 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:09:29,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:29,706 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 25 treesize of output 15 [2021-06-05 05:09:29,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:29,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:29,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:29,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-06-05 05:09:29,731 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:29,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464857204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:29,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:29,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-06-05 05:09:29,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080174477] [2021-06-05 05:09:29,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:09:29,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:29,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:09:29,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:09:29,732 INFO L87 Difference]: Start difference. First operand 1031 states and 2448 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:31,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:31,462 INFO L93 Difference]: Finished difference Result 2318 states and 5663 transitions. [2021-06-05 05:09:31,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:09:31,462 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:09:31,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:31,464 INFO L225 Difference]: With dead ends: 2318 [2021-06-05 05:09:31,464 INFO L226 Difference]: Without dead ends: 2309 [2021-06-05 05:09:31,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 975.8ms TimeCoverageRelationStatistics Valid=253, Invalid=1727, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:09:31,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2021-06-05 05:09:31,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 1023. [2021-06-05 05:09:31,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 2.3767123287671232) internal successors, (2429), 1022 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:31,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 2429 transitions. [2021-06-05 05:09:31,476 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 2429 transitions. Word has length 30 [2021-06-05 05:09:31,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:31,476 INFO L482 AbstractCegarLoop]: Abstraction has 1023 states and 2429 transitions. [2021-06-05 05:09:31,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:31,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 2429 transitions. [2021-06-05 05:09:31,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:09:31,477 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:31,477 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:31,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-05 05:09:31,677 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:31,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:31,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1359235047, now seen corresponding path program 44 times [2021-06-05 05:09:31,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:31,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63312254] [2021-06-05 05:09:31,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:31,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:31,905 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:31,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:31,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63312254] [2021-06-05 05:09:31,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63312254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:31,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35446490] [2021-06-05 05:09:31,905 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:31,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:09:31,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:31,927 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:09:31,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:32,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:32,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-06-05 05:09:32,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:09:32,152 INFO L628 ElimStorePlain]: treesize reduction 6, result has 90.3 percent of original size [2021-06-05 05:09:32,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:32,153 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:56 [2021-06-05 05:09:32,244 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:32,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35446490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:32,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:32,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 05:09:32,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047016001] [2021-06-05 05:09:32,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:09:32,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:32,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:09:32,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:09:32,245 INFO L87 Difference]: Start difference. First operand 1023 states and 2429 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:33,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:33,701 INFO L93 Difference]: Finished difference Result 2386 states and 5821 transitions. [2021-06-05 05:09:33,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:09:33,701 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:09:33,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:33,704 INFO L225 Difference]: With dead ends: 2386 [2021-06-05 05:09:33,704 INFO L226 Difference]: Without dead ends: 2371 [2021-06-05 05:09:33,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1193.3ms TimeCoverageRelationStatistics Valid=353, Invalid=1627, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:09:33,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2021-06-05 05:09:33,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 1011. [2021-06-05 05:09:33,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1010 states have (on average 2.375247524752475) internal successors, (2399), 1010 states have internal predecessors, (2399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:33,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 2399 transitions. [2021-06-05 05:09:33,715 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 2399 transitions. Word has length 30 [2021-06-05 05:09:33,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:33,715 INFO L482 AbstractCegarLoop]: Abstraction has 1011 states and 2399 transitions. [2021-06-05 05:09:33,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:33,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 2399 transitions. [2021-06-05 05:09:33,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:09:33,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:33,716 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:33,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-05 05:09:33,916 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:33,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:33,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1926120071, now seen corresponding path program 45 times [2021-06-05 05:09:33,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:33,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781789223] [2021-06-05 05:09:33,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:33,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:34,149 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:34,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:34,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781789223] [2021-06-05 05:09:34,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781789223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:34,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044469211] [2021-06-05 05:09:34,149 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:34,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:09:34,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:34,171 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:09:34,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:34,313 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 28 treesize of output 16 [2021-06-05 05:09:34,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:34,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:34,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:34,318 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:09:34,336 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:34,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044469211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:34,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:34,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:09:34,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638941688] [2021-06-05 05:09:34,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:09:34,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:34,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:09:34,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:09:34,337 INFO L87 Difference]: Start difference. First operand 1011 states and 2399 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:35,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:35,324 INFO L93 Difference]: Finished difference Result 2268 states and 5516 transitions. [2021-06-05 05:09:35,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:09:35,324 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 30 [2021-06-05 05:09:35,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:35,326 INFO L225 Difference]: With dead ends: 2268 [2021-06-05 05:09:35,326 INFO L226 Difference]: Without dead ends: 2245 [2021-06-05 05:09:35,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 855.9ms TimeCoverageRelationStatistics Valid=322, Invalid=1160, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:09:35,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2021-06-05 05:09:35,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 996. [2021-06-05 05:09:35,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 2.3738693467336685) internal successors, (2362), 995 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:35,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 2362 transitions. [2021-06-05 05:09:35,336 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 2362 transitions. Word has length 30 [2021-06-05 05:09:35,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:35,336 INFO L482 AbstractCegarLoop]: Abstraction has 996 states and 2362 transitions. [2021-06-05 05:09:35,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:35,337 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 2362 transitions. [2021-06-05 05:09:35,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:09:35,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:35,337 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:35,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:35,538 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:35,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:35,538 INFO L82 PathProgramCache]: Analyzing trace with hash 389195863, now seen corresponding path program 46 times [2021-06-05 05:09:35,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:35,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349216013] [2021-06-05 05:09:35,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:35,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:35,744 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:35,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:35,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349216013] [2021-06-05 05:09:35,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349216013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:35,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155288400] [2021-06-05 05:09:35,744 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:35,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:09:35,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:35,765 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:09:35,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:35,911 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 25 treesize of output 15 [2021-06-05 05:09:35,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:35,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:35,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:35,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-06-05 05:09:35,935 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:35,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155288400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:35,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:35,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-06-05 05:09:35,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546937292] [2021-06-05 05:09:35,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:09:35,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:35,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:09:35,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:09:35,935 INFO L87 Difference]: Start difference. First operand 996 states and 2362 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:37,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:37,286 INFO L93 Difference]: Finished difference Result 2400 states and 5871 transitions. [2021-06-05 05:09:37,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:09:37,287 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:09:37,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:37,289 INFO L225 Difference]: With dead ends: 2400 [2021-06-05 05:09:37,289 INFO L226 Difference]: Without dead ends: 2391 [2021-06-05 05:09:37,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 917.5ms TimeCoverageRelationStatistics Valid=243, Invalid=1649, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:09:37,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-06-05 05:09:37,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1018. [2021-06-05 05:09:37,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1017 states have (on average 2.3785644051130777) internal successors, (2419), 1017 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:37,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 2419 transitions. [2021-06-05 05:09:37,301 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 2419 transitions. Word has length 30 [2021-06-05 05:09:37,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:37,301 INFO L482 AbstractCegarLoop]: Abstraction has 1018 states and 2419 transitions. [2021-06-05 05:09:37,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:37,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 2419 transitions. [2021-06-05 05:09:37,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:09:37,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:37,302 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:37,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:37,503 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:37,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:37,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1164967287, now seen corresponding path program 47 times [2021-06-05 05:09:37,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:37,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609580088] [2021-06-05 05:09:37,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:37,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:37,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:37,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609580088] [2021-06-05 05:09:37,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609580088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:37,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452211841] [2021-06-05 05:09:37,723 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:37,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:09:37,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:37,746 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:09:37,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:37,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:09:37,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:09:37,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:38,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:38,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:09:38,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:38,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:38,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:38,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:11 [2021-06-05 05:09:38,043 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:38,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452211841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:38,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:38,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:09:38,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407009300] [2021-06-05 05:09:38,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:09:38,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:38,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:09:38,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:09:38,044 INFO L87 Difference]: Start difference. First operand 1018 states and 2419 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:39,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:39,384 INFO L93 Difference]: Finished difference Result 2256 states and 5534 transitions. [2021-06-05 05:09:39,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:09:39,385 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 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 30 [2021-06-05 05:09:39,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:39,386 INFO L225 Difference]: With dead ends: 2256 [2021-06-05 05:09:39,387 INFO L226 Difference]: Without dead ends: 2247 [2021-06-05 05:09:39,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1266.8ms TimeCoverageRelationStatistics Valid=356, Invalid=2194, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:09:39,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2247 states. [2021-06-05 05:09:39,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2247 to 1047. [2021-06-05 05:09:39,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 2.387189292543021) internal successors, (2497), 1046 states have internal predecessors, (2497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:39,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 2497 transitions. [2021-06-05 05:09:39,398 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 2497 transitions. Word has length 30 [2021-06-05 05:09:39,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:39,398 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 2497 transitions. [2021-06-05 05:09:39,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:39,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 2497 transitions. [2021-06-05 05:09:39,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:09:39,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:39,399 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:39,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:39,599 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:39,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:39,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1830170455, now seen corresponding path program 48 times [2021-06-05 05:09:39,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:39,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271232239] [2021-06-05 05:09:39,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:39,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:39,806 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:39,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:39,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271232239] [2021-06-05 05:09:39,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271232239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:39,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456821148] [2021-06-05 05:09:39,806 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:39,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:09:39,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:39,834 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:09:39,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:39,958 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 25 treesize of output 15 [2021-06-05 05:09:39,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:39,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:39,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:39,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:09:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:39,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456821148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:39,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:39,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 05:09:39,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251816466] [2021-06-05 05:09:39,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:09:39,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:39,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:09:39,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:09:39,987 INFO L87 Difference]: Start difference. First operand 1047 states and 2497 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:41,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:41,392 INFO L93 Difference]: Finished difference Result 2608 states and 6424 transitions. [2021-06-05 05:09:41,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:09:41,392 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 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 30 [2021-06-05 05:09:41,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:41,395 INFO L225 Difference]: With dead ends: 2608 [2021-06-05 05:09:41,395 INFO L226 Difference]: Without dead ends: 2591 [2021-06-05 05:09:41,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1111.7ms TimeCoverageRelationStatistics Valid=347, Invalid=1909, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:09:41,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2021-06-05 05:09:41,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 1087. [2021-06-05 05:09:41,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 2.39134438305709) internal successors, (2597), 1086 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:41,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 2597 transitions. [2021-06-05 05:09:41,407 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 2597 transitions. Word has length 30 [2021-06-05 05:09:41,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:41,407 INFO L482 AbstractCegarLoop]: Abstraction has 1087 states and 2597 transitions. [2021-06-05 05:09:41,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:41,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 2597 transitions. [2021-06-05 05:09:41,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:09:41,408 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:41,408 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:41,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable385 [2021-06-05 05:09:41,608 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:41,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:41,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1466543531, now seen corresponding path program 49 times [2021-06-05 05:09:41,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:41,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550244396] [2021-06-05 05:09:41,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:41,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:41,818 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:41,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:41,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550244396] [2021-06-05 05:09:41,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550244396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:41,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494495174] [2021-06-05 05:09:41,818 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:41,839 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:09:41,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:41,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 05:09:41,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:42,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:42,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:42,002 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-06-05 05:09:42,023 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:42,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494495174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:42,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:42,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-06-05 05:09:42,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966164418] [2021-06-05 05:09:42,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:09:42,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:42,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:09:42,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:09:42,023 INFO L87 Difference]: Start difference. First operand 1087 states and 2597 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:43,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:43,490 INFO L93 Difference]: Finished difference Result 2444 states and 5988 transitions. [2021-06-05 05:09:43,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:09:43,490 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 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 30 [2021-06-05 05:09:43,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:43,492 INFO L225 Difference]: With dead ends: 2444 [2021-06-05 05:09:43,492 INFO L226 Difference]: Without dead ends: 2435 [2021-06-05 05:09:43,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1009.2ms TimeCoverageRelationStatistics Valid=271, Invalid=1799, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:09:43,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2435 states. [2021-06-05 05:09:43,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2435 to 1086. [2021-06-05 05:09:43,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 2.390783410138249) internal successors, (2594), 1085 states have internal predecessors, (2594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:43,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 2594 transitions. [2021-06-05 05:09:43,505 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 2594 transitions. Word has length 30 [2021-06-05 05:09:43,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:43,505 INFO L482 AbstractCegarLoop]: Abstraction has 1086 states and 2594 transitions. [2021-06-05 05:09:43,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:43,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 2594 transitions. [2021-06-05 05:09:43,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:09:43,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:43,506 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:43,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-05 05:09:43,712 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:43,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:43,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1628918971, now seen corresponding path program 50 times [2021-06-05 05:09:43,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:43,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769856370] [2021-06-05 05:09:43,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:43,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:43,921 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:43,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:43,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769856370] [2021-06-05 05:09:43,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769856370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:43,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313063914] [2021-06-05 05:09:43,921 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:43,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:09:43,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:43,943 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:09:43,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:44,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 05:09:44,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:44,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:44,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:44,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:09:44,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:44,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313063914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:44,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:44,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 05:09:44,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410409110] [2021-06-05 05:09:44,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:09:44,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:44,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:09:44,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:09:44,091 INFO L87 Difference]: Start difference. First operand 1086 states and 2594 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:46,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:46,079 INFO L93 Difference]: Finished difference Result 2770 states and 6829 transitions. [2021-06-05 05:09:46,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:09:46,079 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 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 30 [2021-06-05 05:09:46,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:46,082 INFO L225 Difference]: With dead ends: 2770 [2021-06-05 05:09:46,082 INFO L226 Difference]: Without dead ends: 2755 [2021-06-05 05:09:46,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1619.0ms TimeCoverageRelationStatistics Valid=556, Invalid=2306, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:09:46,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2021-06-05 05:09:46,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 1065. [2021-06-05 05:09:46,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1064 states have (on average 2.3843984962406015) internal successors, (2537), 1064 states have internal predecessors, (2537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:46,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 2537 transitions. [2021-06-05 05:09:46,095 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 2537 transitions. Word has length 30 [2021-06-05 05:09:46,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:46,095 INFO L482 AbstractCegarLoop]: Abstraction has 1065 states and 2537 transitions. [2021-06-05 05:09:46,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:46,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 2537 transitions. [2021-06-05 05:09:46,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:09:46,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:46,096 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:46,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-06-05 05:09:46,296 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:46,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:46,297 INFO L82 PathProgramCache]: Analyzing trace with hash 331204883, now seen corresponding path program 51 times [2021-06-05 05:09:46,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:46,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644327517] [2021-06-05 05:09:46,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:46,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:46,542 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:46,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:46,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644327517] [2021-06-05 05:09:46,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644327517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:46,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493569575] [2021-06-05 05:09:46,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:46,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:09:46,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:46,565 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 05:09:46,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:46,741 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:46,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 31 [2021-06-05 05:09:46,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:09:46,786 INFO L628 ElimStorePlain]: treesize reduction 8, result has 88.7 percent of original size [2021-06-05 05:09:46,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:46,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:63 [2021-06-05 05:09:46,962 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:46,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493569575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:46,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:46,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 25 [2021-06-05 05:09:46,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347526538] [2021-06-05 05:09:46,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:09:46,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:46,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:09:46,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:09:46,963 INFO L87 Difference]: Start difference. First operand 1065 states and 2537 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:48,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:48,831 INFO L93 Difference]: Finished difference Result 2523 states and 6173 transitions. [2021-06-05 05:09:48,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:09:48,831 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:09:48,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:48,833 INFO L225 Difference]: With dead ends: 2523 [2021-06-05 05:09:48,833 INFO L226 Difference]: Without dead ends: 2512 [2021-06-05 05:09:48,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 1449.5ms TimeCoverageRelationStatistics Valid=388, Invalid=2368, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:09:48,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2512 states. [2021-06-05 05:09:48,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2512 to 1119. [2021-06-05 05:09:48,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 2.3989266547406083) internal successors, (2682), 1118 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:48,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 2682 transitions. [2021-06-05 05:09:48,846 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 2682 transitions. Word has length 30 [2021-06-05 05:09:48,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:48,846 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 2682 transitions. [2021-06-05 05:09:48,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:48,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 2682 transitions. [2021-06-05 05:09:48,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:09:48,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:48,847 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:49,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable388,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:49,047 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:49,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:49,048 INFO L82 PathProgramCache]: Analyzing trace with hash 2087605933, now seen corresponding path program 52 times [2021-06-05 05:09:49,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:49,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826853386] [2021-06-05 05:09:49,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:49,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:49,288 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:49,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:49,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826853386] [2021-06-05 05:09:49,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826853386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:49,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280421562] [2021-06-05 05:09:49,289 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:49,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:09:49,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:49,311 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:09:49,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:49,429 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 25 treesize of output 15 [2021-06-05 05:09:49,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:49,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:49,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:49,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:09:49,457 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:49,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280421562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:49,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:49,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 05:09:49,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961258529] [2021-06-05 05:09:49,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:09:49,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:49,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:09:49,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:09:49,457 INFO L87 Difference]: Start difference. First operand 1119 states and 2682 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:50,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:50,658 INFO L93 Difference]: Finished difference Result 2681 states and 6617 transitions. [2021-06-05 05:09:50,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:09:50,658 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:09:50,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:50,660 INFO L225 Difference]: With dead ends: 2681 [2021-06-05 05:09:50,660 INFO L226 Difference]: Without dead ends: 2661 [2021-06-05 05:09:50,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 905.5ms TimeCoverageRelationStatistics Valid=293, Invalid=1267, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:09:50,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2661 states. [2021-06-05 05:09:50,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2661 to 1134. [2021-06-05 05:09:50,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1133 states have (on average 2.4007060900264783) internal successors, (2720), 1133 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:50,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 2720 transitions. [2021-06-05 05:09:50,673 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 2720 transitions. Word has length 30 [2021-06-05 05:09:50,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:50,673 INFO L482 AbstractCegarLoop]: Abstraction has 1134 states and 2720 transitions. [2021-06-05 05:09:50,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:50,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 2720 transitions. [2021-06-05 05:09:50,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:09:50,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:50,674 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:50,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:50,874 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:50,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:50,874 INFO L82 PathProgramCache]: Analyzing trace with hash -678407295, now seen corresponding path program 53 times [2021-06-05 05:09:50,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:50,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800861522] [2021-06-05 05:09:50,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:51,118 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:51,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:51,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800861522] [2021-06-05 05:09:51,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800861522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:51,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359190473] [2021-06-05 05:09:51,118 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:51,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:09:51,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:51,141 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:09:51,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:51,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 05:09:51,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:51,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:51,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:51,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:09:51,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:51,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359190473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:51,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:51,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:09:51,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340928031] [2021-06-05 05:09:51,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:09:51,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:51,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:09:51,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:09:51,304 INFO L87 Difference]: Start difference. First operand 1134 states and 2720 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:52,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:52,366 INFO L93 Difference]: Finished difference Result 2386 states and 5835 transitions. [2021-06-05 05:09:52,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:09:52,367 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:09:52,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:52,369 INFO L225 Difference]: With dead ends: 2386 [2021-06-05 05:09:52,369 INFO L226 Difference]: Without dead ends: 2363 [2021-06-05 05:09:52,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 839.4ms TimeCoverageRelationStatistics Valid=258, Invalid=1148, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:09:52,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2021-06-05 05:09:52,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 1125. [2021-06-05 05:09:52,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1124 states have (on average 2.3976868327402134) internal successors, (2695), 1124 states have internal predecessors, (2695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:52,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 2695 transitions. [2021-06-05 05:09:52,381 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 2695 transitions. Word has length 30 [2021-06-05 05:09:52,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:52,381 INFO L482 AbstractCegarLoop]: Abstraction has 1125 states and 2695 transitions. [2021-06-05 05:09:52,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:52,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 2695 transitions. [2021-06-05 05:09:52,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:09:52,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:52,382 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:52,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:52,582 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:52,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:52,582 INFO L82 PathProgramCache]: Analyzing trace with hash 395838389, now seen corresponding path program 54 times [2021-06-05 05:09:52,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:52,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974688189] [2021-06-05 05:09:52,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:52,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:52,844 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:52,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:52,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974688189] [2021-06-05 05:09:52,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974688189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:52,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130960325] [2021-06-05 05:09:52,845 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:52,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:09:52,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:52,867 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:09:52,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:52,988 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 25 treesize of output 15 [2021-06-05 05:09:52,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:52,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:52,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:52,993 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:09:53,017 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:53,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130960325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:53,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:53,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 05:09:53,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288147447] [2021-06-05 05:09:53,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:09:53,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:53,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:09:53,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:09:53,018 INFO L87 Difference]: Start difference. First operand 1125 states and 2695 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:54,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:54,076 INFO L93 Difference]: Finished difference Result 2541 states and 6233 transitions. [2021-06-05 05:09:54,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:09:54,076 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:09:54,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:54,079 INFO L225 Difference]: With dead ends: 2541 [2021-06-05 05:09:54,079 INFO L226 Difference]: Without dead ends: 2530 [2021-06-05 05:09:54,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 873.3ms TimeCoverageRelationStatistics Valid=264, Invalid=1218, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:09:54,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-06-05 05:09:54,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 1134. [2021-06-05 05:09:54,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1133 states have (on average 2.3971756398940864) internal successors, (2716), 1133 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:54,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 2716 transitions. [2021-06-05 05:09:54,091 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 2716 transitions. Word has length 30 [2021-06-05 05:09:54,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:54,091 INFO L482 AbstractCegarLoop]: Abstraction has 1134 states and 2716 transitions. [2021-06-05 05:09:54,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:54,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 2716 transitions. [2021-06-05 05:09:54,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:09:54,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:54,092 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:54,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-06-05 05:09:54,293 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:54,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:54,293 INFO L82 PathProgramCache]: Analyzing trace with hash -2142727857, now seen corresponding path program 55 times [2021-06-05 05:09:54,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:54,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640258991] [2021-06-05 05:09:54,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:54,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:54,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:54,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:54,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640258991] [2021-06-05 05:09:54,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640258991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:54,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919867527] [2021-06-05 05:09:54,551 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:54,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:54,572 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:09:54,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:54,692 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 25 treesize of output 15 [2021-06-05 05:09:54,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:54,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:54,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:54,697 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:09:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:54,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919867527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:54,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:54,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 05:09:54,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331231262] [2021-06-05 05:09:54,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:09:54,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:54,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:09:54,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:09:54,723 INFO L87 Difference]: Start difference. First operand 1134 states and 2716 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:55,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:55,800 INFO L93 Difference]: Finished difference Result 2677 states and 6594 transitions. [2021-06-05 05:09:55,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:09:55,801 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:09:55,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:55,803 INFO L225 Difference]: With dead ends: 2677 [2021-06-05 05:09:55,803 INFO L226 Difference]: Without dead ends: 2657 [2021-06-05 05:09:55,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 911.5ms TimeCoverageRelationStatistics Valid=284, Invalid=1276, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:09:55,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2021-06-05 05:09:55,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 1127. [2021-06-05 05:09:55,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1126 states have (on average 2.3978685612788633) internal successors, (2700), 1126 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:55,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 2700 transitions. [2021-06-05 05:09:55,816 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 2700 transitions. Word has length 30 [2021-06-05 05:09:55,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:55,816 INFO L482 AbstractCegarLoop]: Abstraction has 1127 states and 2700 transitions. [2021-06-05 05:09:55,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:55,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 2700 transitions. [2021-06-05 05:09:55,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:09:55,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:55,817 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:56,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-05 05:09:56,018 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:56,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:56,018 INFO L82 PathProgramCache]: Analyzing trace with hash -2028751941, now seen corresponding path program 56 times [2021-06-05 05:09:56,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:56,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201773282] [2021-06-05 05:09:56,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:56,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:56,244 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:56,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:56,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201773282] [2021-06-05 05:09:56,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201773282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:56,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052721961] [2021-06-05 05:09:56,244 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:56,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:09:56,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:56,266 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:09:56,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:56,406 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 25 treesize of output 15 [2021-06-05 05:09:56,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:56,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:56,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:56,410 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-06-05 05:09:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:56,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052721961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:56,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:56,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-06-05 05:09:56,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614078929] [2021-06-05 05:09:56,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:09:56,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:56,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:09:56,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:09:56,431 INFO L87 Difference]: Start difference. First operand 1127 states and 2700 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:57,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:57,869 INFO L93 Difference]: Finished difference Result 2483 states and 6087 transitions. [2021-06-05 05:09:57,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:09:57,869 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 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 30 [2021-06-05 05:09:57,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:57,871 INFO L225 Difference]: With dead ends: 2483 [2021-06-05 05:09:57,871 INFO L226 Difference]: Without dead ends: 2474 [2021-06-05 05:09:57,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 888.0ms TimeCoverageRelationStatistics Valid=243, Invalid=1563, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:09:57,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-06-05 05:09:57,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 1119. [2021-06-05 05:09:57,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 2.3980322003577816) internal successors, (2681), 1118 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:57,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 2681 transitions. [2021-06-05 05:09:57,885 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 2681 transitions. Word has length 30 [2021-06-05 05:09:57,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:57,885 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 2681 transitions. [2021-06-05 05:09:57,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:57,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 2681 transitions. [2021-06-05 05:09:57,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:09:57,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:57,886 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:58,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-06-05 05:09:58,087 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:58,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:58,087 INFO L82 PathProgramCache]: Analyzing trace with hash -630057595, now seen corresponding path program 27 times [2021-06-05 05:09:58,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:58,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610484534] [2021-06-05 05:09:58,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:58,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:58,307 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:58,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:58,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610484534] [2021-06-05 05:09:58,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610484534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:58,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527282711] [2021-06-05 05:09:58,307 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:58,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:09:58,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:58,330 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:09:58,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:58,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:58,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 35 [2021-06-05 05:09:58,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:09:58,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:58,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:58,615 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:177 [2021-06-05 05:09:58,758 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-06-05 05:09:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:58,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527282711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:58,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:58,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-06-05 05:09:58,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592316545] [2021-06-05 05:09:58,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:09:58,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:58,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:09:58,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:09:58,909 INFO L87 Difference]: Start difference. First operand 1119 states and 2681 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:01,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:01,586 INFO L93 Difference]: Finished difference Result 2536 states and 6209 transitions. [2021-06-05 05:10:01,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 05:10:01,586 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:10:01,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:01,588 INFO L225 Difference]: With dead ends: 2536 [2021-06-05 05:10:01,588 INFO L226 Difference]: Without dead ends: 2521 [2021-06-05 05:10:01,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 2000.3ms TimeCoverageRelationStatistics Valid=390, Invalid=3032, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:10:01,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2021-06-05 05:10:01,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 1142. [2021-06-05 05:10:01,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 2.4031551270815075) internal successors, (2742), 1141 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:01,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 2742 transitions. [2021-06-05 05:10:01,607 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 2742 transitions. Word has length 30 [2021-06-05 05:10:01,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:01,607 INFO L482 AbstractCegarLoop]: Abstraction has 1142 states and 2742 transitions. [2021-06-05 05:10:01,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:01,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 2742 transitions. [2021-06-05 05:10:01,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:10:01,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:01,608 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:01,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-05 05:10:01,809 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:01,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:01,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1250544731, now seen corresponding path program 28 times [2021-06-05 05:10:01,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:01,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277233188] [2021-06-05 05:10:01,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:01,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:02,033 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:02,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:02,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277233188] [2021-06-05 05:10:02,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277233188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:02,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468861942] [2021-06-05 05:10:02,033 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:02,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:10:02,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:02,055 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:02,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:02,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:10:02,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:10:02,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:02,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:02,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:02,206 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-06-05 05:10:02,236 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:02,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468861942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:02,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:02,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 05:10:02,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518648159] [2021-06-05 05:10:02,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:10:02,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:02,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:10:02,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:10:02,237 INFO L87 Difference]: Start difference. First operand 1142 states and 2742 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:03,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:03,501 INFO L93 Difference]: Finished difference Result 2574 states and 6337 transitions. [2021-06-05 05:10:03,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:10:03,501 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 30 [2021-06-05 05:10:03,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:03,503 INFO L225 Difference]: With dead ends: 2574 [2021-06-05 05:10:03,503 INFO L226 Difference]: Without dead ends: 2563 [2021-06-05 05:10:03,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 988.0ms TimeCoverageRelationStatistics Valid=313, Invalid=1579, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:10:03,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2021-06-05 05:10:03,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 1173. [2021-06-05 05:10:03,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 2.406996587030717) internal successors, (2821), 1172 states have internal predecessors, (2821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:03,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 2821 transitions. [2021-06-05 05:10:03,517 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 2821 transitions. Word has length 30 [2021-06-05 05:10:03,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:03,517 INFO L482 AbstractCegarLoop]: Abstraction has 1173 states and 2821 transitions. [2021-06-05 05:10:03,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:03,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 2821 transitions. [2021-06-05 05:10:03,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:10:03,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:03,518 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:03,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:03,718 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:03,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:03,719 INFO L82 PathProgramCache]: Analyzing trace with hash -585341563, now seen corresponding path program 29 times [2021-06-05 05:10:03,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:03,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080422501] [2021-06-05 05:10:03,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:03,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:03,942 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:03,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:03,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080422501] [2021-06-05 05:10:03,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080422501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:03,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443737033] [2021-06-05 05:10:03,942 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:03,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:10:03,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:03,965 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:03,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:04,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:10:04,122 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 29 treesize of output 17 [2021-06-05 05:10:04,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:04,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:04,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:04,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-06-05 05:10:04,155 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:04,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443737033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:04,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:04,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 05:10:04,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342708941] [2021-06-05 05:10:04,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:10:04,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:04,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:10:04,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:10:04,156 INFO L87 Difference]: Start difference. First operand 1173 states and 2821 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:05,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:05,367 INFO L93 Difference]: Finished difference Result 2645 states and 6520 transitions. [2021-06-05 05:10:05,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:10:05,367 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 30 [2021-06-05 05:10:05,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:05,370 INFO L225 Difference]: With dead ends: 2645 [2021-06-05 05:10:05,370 INFO L226 Difference]: Without dead ends: 2625 [2021-06-05 05:10:05,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 925.1ms TimeCoverageRelationStatistics Valid=294, Invalid=1512, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:10:05,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2021-06-05 05:10:05,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 1161. [2021-06-05 05:10:05,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 1160 states have (on average 2.4051724137931036) internal successors, (2790), 1160 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:05,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 2790 transitions. [2021-06-05 05:10:05,383 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 2790 transitions. Word has length 30 [2021-06-05 05:10:05,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:05,383 INFO L482 AbstractCegarLoop]: Abstraction has 1161 states and 2790 transitions. [2021-06-05 05:10:05,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:05,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 2790 transitions. [2021-06-05 05:10:05,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:10:05,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:05,384 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:05,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:05,587 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:05,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:05,589 INFO L82 PathProgramCache]: Analyzing trace with hash -163012025, now seen corresponding path program 30 times [2021-06-05 05:10:05,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:05,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875452146] [2021-06-05 05:10:05,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:05,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:05,833 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:05,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:05,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875452146] [2021-06-05 05:10:05,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875452146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:05,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083436384] [2021-06-05 05:10:05,833 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:05,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:10:05,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:05,856 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:10:05,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:06,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:10:06,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:06,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 33 [2021-06-05 05:10:06,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:06,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:06,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:06,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:57 [2021-06-05 05:10:06,210 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:06,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083436384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:06,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:06,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-06-05 05:10:06,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728853966] [2021-06-05 05:10:06,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:10:06,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:06,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:10:06,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:10:06,211 INFO L87 Difference]: Start difference. First operand 1161 states and 2790 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:07,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:07,864 INFO L93 Difference]: Finished difference Result 2509 states and 6168 transitions. [2021-06-05 05:10:07,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:10:07,864 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:10:07,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:07,866 INFO L225 Difference]: With dead ends: 2509 [2021-06-05 05:10:07,866 INFO L226 Difference]: Without dead ends: 2498 [2021-06-05 05:10:07,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 1271.6ms TimeCoverageRelationStatistics Valid=367, Invalid=1889, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:10:07,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-06-05 05:10:07,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 1176. [2021-06-05 05:10:07,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 2.4051063829787234) internal successors, (2826), 1175 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:07,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 2826 transitions. [2021-06-05 05:10:07,879 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 2826 transitions. Word has length 30 [2021-06-05 05:10:07,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:07,879 INFO L482 AbstractCegarLoop]: Abstraction has 1176 states and 2826 transitions. [2021-06-05 05:10:07,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:07,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 2826 transitions. [2021-06-05 05:10:07,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:10:07,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:07,880 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:08,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-06-05 05:10:08,081 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:08,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:08,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1593389025, now seen corresponding path program 31 times [2021-06-05 05:10:08,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:08,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924858452] [2021-06-05 05:10:08,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:08,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:08,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:08,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:08,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924858452] [2021-06-05 05:10:08,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924858452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:08,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690980688] [2021-06-05 05:10:08,326 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:08,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:08,347 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:08,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:08,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:10:08,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:10:08,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:08,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:08,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:08,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-06-05 05:10:08,546 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:08,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690980688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:08,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:08,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 05:10:08,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841111660] [2021-06-05 05:10:08,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:10:08,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:08,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:10:08,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:10:08,547 INFO L87 Difference]: Start difference. First operand 1176 states and 2826 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:09,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:09,792 INFO L93 Difference]: Finished difference Result 2729 states and 6734 transitions. [2021-06-05 05:10:09,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:10:09,793 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:10:09,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:09,795 INFO L225 Difference]: With dead ends: 2729 [2021-06-05 05:10:09,795 INFO L226 Difference]: Without dead ends: 2709 [2021-06-05 05:10:09,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1052.7ms TimeCoverageRelationStatistics Valid=345, Invalid=1725, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:10:09,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2709 states. [2021-06-05 05:10:09,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2709 to 1173. [2021-06-05 05:10:09,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 2.4044368600682593) internal successors, (2818), 1172 states have internal predecessors, (2818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:09,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 2818 transitions. [2021-06-05 05:10:09,808 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 2818 transitions. Word has length 30 [2021-06-05 05:10:09,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:09,809 INFO L482 AbstractCegarLoop]: Abstraction has 1173 states and 2818 transitions. [2021-06-05 05:10:09,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:09,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 2818 transitions. [2021-06-05 05:10:09,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:10:09,810 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:09,810 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:10,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:10,010 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:10,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:10,010 INFO L82 PathProgramCache]: Analyzing trace with hash 2128833233, now seen corresponding path program 32 times [2021-06-05 05:10:10,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:10,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116257073] [2021-06-05 05:10:10,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:10,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:10,248 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:10,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:10,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116257073] [2021-06-05 05:10:10,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116257073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:10,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385902902] [2021-06-05 05:10:10,248 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:10,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:10,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:10,270 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:10,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:10,433 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 20 treesize of output 12 [2021-06-05 05:10:10,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:10,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:10,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:10,435 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:10:10,464 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:10,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385902902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:10,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:10,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:10:10,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484755528] [2021-06-05 05:10:10,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:10:10,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:10,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:10:10,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:10:10,464 INFO L87 Difference]: Start difference. First operand 1173 states and 2818 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:11,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:11,922 INFO L93 Difference]: Finished difference Result 2430 states and 5932 transitions. [2021-06-05 05:10:11,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:10:11,922 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:10:11,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:11,924 INFO L225 Difference]: With dead ends: 2430 [2021-06-05 05:10:11,924 INFO L226 Difference]: Without dead ends: 2410 [2021-06-05 05:10:11,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1020.4ms TimeCoverageRelationStatistics Valid=356, Invalid=2094, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:10:11,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2021-06-05 05:10:11,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 1168. [2021-06-05 05:10:11,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 2.4044558697514997) internal successors, (2806), 1167 states have internal predecessors, (2806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:11,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 2806 transitions. [2021-06-05 05:10:11,937 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 2806 transitions. Word has length 30 [2021-06-05 05:10:11,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:11,937 INFO L482 AbstractCegarLoop]: Abstraction has 1168 states and 2806 transitions. [2021-06-05 05:10:11,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:11,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 2806 transitions. [2021-06-05 05:10:11,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:10:11,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:11,938 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:12,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-06-05 05:10:12,138 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:12,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:12,139 INFO L82 PathProgramCache]: Analyzing trace with hash -946712643, now seen corresponding path program 33 times [2021-06-05 05:10:12,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:12,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199335886] [2021-06-05 05:10:12,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:12,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:12,362 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:12,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:12,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199335886] [2021-06-05 05:10:12,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199335886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:12,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636502241] [2021-06-05 05:10:12,362 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:12,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:10:12,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:12,385 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:10:12,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:12,664 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:12,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-05 05:10:12,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:12,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:12,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:12,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:123 [2021-06-05 05:10:12,907 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:12,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636502241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:12,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:12,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-06-05 05:10:12,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335110743] [2021-06-05 05:10:12,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:10:12,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:12,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:10:12,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:10:12,908 INFO L87 Difference]: Start difference. First operand 1168 states and 2806 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:15,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:15,313 INFO L93 Difference]: Finished difference Result 2642 states and 6461 transitions. [2021-06-05 05:10:15,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:10:15,314 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:10:15,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:15,316 INFO L225 Difference]: With dead ends: 2642 [2021-06-05 05:10:15,316 INFO L226 Difference]: Without dead ends: 2631 [2021-06-05 05:10:15,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 1814.8ms TimeCoverageRelationStatistics Valid=494, Invalid=2812, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:10:15,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2021-06-05 05:10:15,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 1199. [2021-06-05 05:10:15,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1198 states have (on average 2.4098497495826376) internal successors, (2887), 1198 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:15,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 2887 transitions. [2021-06-05 05:10:15,329 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 2887 transitions. Word has length 30 [2021-06-05 05:10:15,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:15,329 INFO L482 AbstractCegarLoop]: Abstraction has 1199 states and 2887 transitions. [2021-06-05 05:10:15,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:15,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 2887 transitions. [2021-06-05 05:10:15,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:10:15,330 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:15,330 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:15,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-06-05 05:10:15,530 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:15,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:15,531 INFO L82 PathProgramCache]: Analyzing trace with hash 809688407, now seen corresponding path program 34 times [2021-06-05 05:10:15,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:15,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653905862] [2021-06-05 05:10:15,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:15,759 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:15,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:15,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653905862] [2021-06-05 05:10:15,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653905862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:15,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386025165] [2021-06-05 05:10:15,760 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:15,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:10:15,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:15,782 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:15,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:15,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:10:15,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:15,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:15,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:15,934 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:10:15,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:15,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386025165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:15,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:15,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 05:10:15,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622692528] [2021-06-05 05:10:15,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:10:15,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:15,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:10:15,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:10:15,965 INFO L87 Difference]: Start difference. First operand 1199 states and 2887 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:17,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:17,566 INFO L93 Difference]: Finished difference Result 2948 states and 7300 transitions. [2021-06-05 05:10:17,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:10:17,566 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:10:17,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:17,569 INFO L225 Difference]: With dead ends: 2948 [2021-06-05 05:10:17,569 INFO L226 Difference]: Without dead ends: 2928 [2021-06-05 05:10:17,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 1239.2ms TimeCoverageRelationStatistics Valid=437, Invalid=2013, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:10:17,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2928 states. [2021-06-05 05:10:17,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2928 to 1241. [2021-06-05 05:10:17,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 2.4161290322580644) internal successors, (2996), 1240 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:17,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 2996 transitions. [2021-06-05 05:10:17,583 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 2996 transitions. Word has length 30 [2021-06-05 05:10:17,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:17,583 INFO L482 AbstractCegarLoop]: Abstraction has 1241 states and 2996 transitions. [2021-06-05 05:10:17,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:17,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 2996 transitions. [2021-06-05 05:10:17,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:10:17,584 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:17,584 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:17,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 05:10:17,785 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:17,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:17,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1345132615, now seen corresponding path program 35 times [2021-06-05 05:10:17,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:17,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400083618] [2021-06-05 05:10:17,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:17,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:18,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:18,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400083618] [2021-06-05 05:10:18,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400083618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:18,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290667126] [2021-06-05 05:10:18,003 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:18,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:10:18,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:18,025 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:18,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:18,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:10:18,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:18,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:18,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:18,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:10:18,209 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:18,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290667126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:18,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:18,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:10:18,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353542157] [2021-06-05 05:10:18,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:10:18,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:18,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:10:18,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:10:18,210 INFO L87 Difference]: Start difference. First operand 1241 states and 2996 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:19,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:19,653 INFO L93 Difference]: Finished difference Result 2473 states and 6062 transitions. [2021-06-05 05:10:19,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:10:19,653 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:10:19,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:19,655 INFO L225 Difference]: With dead ends: 2473 [2021-06-05 05:10:19,655 INFO L226 Difference]: Without dead ends: 2453 [2021-06-05 05:10:19,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 917.5ms TimeCoverageRelationStatistics Valid=305, Invalid=1587, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:10:19,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2021-06-05 05:10:19,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 1235. [2021-06-05 05:10:19,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1235 states, 1234 states have (on average 2.4157212317666126) internal successors, (2981), 1234 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:19,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 2981 transitions. [2021-06-05 05:10:19,673 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 2981 transitions. Word has length 30 [2021-06-05 05:10:19,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:19,673 INFO L482 AbstractCegarLoop]: Abstraction has 1235 states and 2981 transitions. [2021-06-05 05:10:19,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:19,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 2981 transitions. [2021-06-05 05:10:19,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:10:19,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:19,674 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:19,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 05:10:19,881 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:19,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:19,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1749878753, now seen corresponding path program 36 times [2021-06-05 05:10:19,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:19,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025305223] [2021-06-05 05:10:19,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:19,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:20,097 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:20,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:20,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025305223] [2021-06-05 05:10:20,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025305223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:20,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804009051] [2021-06-05 05:10:20,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:20,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:10:20,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:20,121 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:10:20,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:20,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:10:20,353 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:20,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:10:20,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:20,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:20,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:20,365 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:38 [2021-06-05 05:10:20,484 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:20,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804009051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:20,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:20,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-06-05 05:10:20,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482803544] [2021-06-05 05:10:20,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:10:20,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:20,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:10:20,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:10:20,485 INFO L87 Difference]: Start difference. First operand 1235 states and 2981 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:22,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:22,596 INFO L93 Difference]: Finished difference Result 2716 states and 6646 transitions. [2021-06-05 05:10:22,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:10:22,597 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:10:22,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:22,599 INFO L225 Difference]: With dead ends: 2716 [2021-06-05 05:10:22,599 INFO L226 Difference]: Without dead ends: 2685 [2021-06-05 05:10:22,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 1465.5ms TimeCoverageRelationStatistics Valid=380, Invalid=1972, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:10:22,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2021-06-05 05:10:22,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 1228. [2021-06-05 05:10:22,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 2.4140179299103504) internal successors, (2962), 1227 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:22,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 2962 transitions. [2021-06-05 05:10:22,612 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 2962 transitions. Word has length 30 [2021-06-05 05:10:22,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:22,612 INFO L482 AbstractCegarLoop]: Abstraction has 1228 states and 2962 transitions. [2021-06-05 05:10:22,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:22,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 2962 transitions. [2021-06-05 05:10:22,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:10:22,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:22,613 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:22,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:22,814 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:22,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:22,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1662047545, now seen corresponding path program 37 times [2021-06-05 05:10:22,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:22,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924210845] [2021-06-05 05:10:22,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:22,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:23,006 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:23,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:23,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924210845] [2021-06-05 05:10:23,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924210845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:23,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763268012] [2021-06-05 05:10:23,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:23,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:23,028 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:23,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:23,183 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 20 treesize of output 12 [2021-06-05 05:10:23,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:23,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:23,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:23,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:10:23,216 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:23,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763268012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:23,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:23,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 05:10:23,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284034366] [2021-06-05 05:10:23,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:10:23,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:23,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:10:23,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:10:23,217 INFO L87 Difference]: Start difference. First operand 1228 states and 2962 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:24,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:24,516 INFO L93 Difference]: Finished difference Result 2963 states and 7309 transitions. [2021-06-05 05:10:24,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:10:24,517 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:10:24,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:24,519 INFO L225 Difference]: With dead ends: 2963 [2021-06-05 05:10:24,519 INFO L226 Difference]: Without dead ends: 2947 [2021-06-05 05:10:24,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 991.2ms TimeCoverageRelationStatistics Valid=379, Invalid=1601, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:10:24,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2021-06-05 05:10:24,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 1249. [2021-06-05 05:10:24,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 2.417467948717949) internal successors, (3017), 1248 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:24,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 3017 transitions. [2021-06-05 05:10:24,535 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 3017 transitions. Word has length 30 [2021-06-05 05:10:24,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:24,535 INFO L482 AbstractCegarLoop]: Abstraction has 1249 states and 3017 transitions. [2021-06-05 05:10:24,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:24,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 3017 transitions. [2021-06-05 05:10:24,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:10:24,536 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:24,536 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:24,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:24,736 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:24,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:24,736 INFO L82 PathProgramCache]: Analyzing trace with hash 94353505, now seen corresponding path program 38 times [2021-06-05 05:10:24,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:24,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812370982] [2021-06-05 05:10:24,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:24,930 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:24,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:24,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812370982] [2021-06-05 05:10:24,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812370982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:24,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053469206] [2021-06-05 05:10:24,930 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:24,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:24,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:24,952 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:10:24,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:25,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:10:25,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:25,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2021-06-05 05:10:25,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:25,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:25,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:25,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:40 [2021-06-05 05:10:25,263 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:25,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053469206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:25,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:25,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-06-05 05:10:25,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561402246] [2021-06-05 05:10:25,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:10:25,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:25,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:10:25,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:10:25,264 INFO L87 Difference]: Start difference. First operand 1249 states and 3017 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:26,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:26,662 INFO L93 Difference]: Finished difference Result 2873 states and 7111 transitions. [2021-06-05 05:10:26,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:10:26,662 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:10:26,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:26,664 INFO L225 Difference]: With dead ends: 2873 [2021-06-05 05:10:26,664 INFO L226 Difference]: Without dead ends: 2861 [2021-06-05 05:10:26,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 1076.1ms TimeCoverageRelationStatistics Valid=400, Invalid=1856, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:10:26,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2021-06-05 05:10:26,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 1256. [2021-06-05 05:10:26,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 1255 states have (on average 2.417529880478088) internal successors, (3034), 1255 states have internal predecessors, (3034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:26,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 3034 transitions. [2021-06-05 05:10:26,678 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 3034 transitions. Word has length 30 [2021-06-05 05:10:26,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:26,678 INFO L482 AbstractCegarLoop]: Abstraction has 1256 states and 3034 transitions. [2021-06-05 05:10:26,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:26,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 3034 transitions. [2021-06-05 05:10:26,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:10:26,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:26,679 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:26,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable441,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:26,880 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:26,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:26,880 INFO L82 PathProgramCache]: Analyzing trace with hash -823596685, now seen corresponding path program 39 times [2021-06-05 05:10:26,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:26,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535235627] [2021-06-05 05:10:26,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:26,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:27,068 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:27,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:27,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535235627] [2021-06-05 05:10:27,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535235627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:27,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582784103] [2021-06-05 05:10:27,069 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:27,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:10:27,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:27,092 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:27,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:27,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:10:27,249 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 29 treesize of output 17 [2021-06-05 05:10:27,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:27,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:27,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:27,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-06-05 05:10:27,295 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:27,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582784103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:27,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:27,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:10:27,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678328810] [2021-06-05 05:10:27,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:10:27,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:27,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:10:27,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:10:27,296 INFO L87 Difference]: Start difference. First operand 1256 states and 3034 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:28,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:28,984 INFO L93 Difference]: Finished difference Result 3308 states and 8149 transitions. [2021-06-05 05:10:28,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:10:28,985 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:10:28,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:28,988 INFO L225 Difference]: With dead ends: 3308 [2021-06-05 05:10:28,988 INFO L226 Difference]: Without dead ends: 3290 [2021-06-05 05:10:28,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 1385.1ms TimeCoverageRelationStatistics Valid=648, Invalid=2774, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:10:28,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3290 states. [2021-06-05 05:10:29,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3290 to 1244. [2021-06-05 05:10:29,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1243 states have (on average 2.415124698310539) internal successors, (3002), 1243 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:29,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 3002 transitions. [2021-06-05 05:10:29,003 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 3002 transitions. Word has length 30 [2021-06-05 05:10:29,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:29,003 INFO L482 AbstractCegarLoop]: Abstraction has 1244 states and 3002 transitions. [2021-06-05 05:10:29,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:29,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 3002 transitions. [2021-06-05 05:10:29,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:10:29,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:29,004 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:29,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-06-05 05:10:29,205 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:29,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:29,205 INFO L82 PathProgramCache]: Analyzing trace with hash 629797713, now seen corresponding path program 40 times [2021-06-05 05:10:29,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:29,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014716377] [2021-06-05 05:10:29,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:29,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:29,408 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:29,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:29,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014716377] [2021-06-05 05:10:29,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014716377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:29,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909560204] [2021-06-05 05:10:29,408 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:29,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:10:29,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:29,431 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:29,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:29,606 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 20 treesize of output 12 [2021-06-05 05:10:29,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:29,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:29,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:29,608 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 05:10:29,636 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:29,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909560204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:29,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:29,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:10:29,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216955835] [2021-06-05 05:10:29,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:10:29,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:29,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:10:29,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:10:29,637 INFO L87 Difference]: Start difference. First operand 1244 states and 3002 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:30,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:30,844 INFO L93 Difference]: Finished difference Result 2644 states and 6448 transitions. [2021-06-05 05:10:30,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:10:30,844 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:10:30,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:30,847 INFO L225 Difference]: With dead ends: 2644 [2021-06-05 05:10:30,847 INFO L226 Difference]: Without dead ends: 2624 [2021-06-05 05:10:30,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 856.9ms TimeCoverageRelationStatistics Valid=324, Invalid=1568, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:10:30,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2624 states. [2021-06-05 05:10:30,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2624 to 1232. [2021-06-05 05:10:30,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1231 states have (on average 2.4151096669374494) internal successors, (2973), 1231 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:30,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 2973 transitions. [2021-06-05 05:10:30,865 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 2973 transitions. Word has length 30 [2021-06-05 05:10:30,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:30,865 INFO L482 AbstractCegarLoop]: Abstraction has 1232 states and 2973 transitions. [2021-06-05 05:10:30,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:30,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 2973 transitions. [2021-06-05 05:10:30,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:10:30,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:30,866 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:31,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-06-05 05:10:31,067 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:31,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:31,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1007774743, now seen corresponding path program 41 times [2021-06-05 05:10:31,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:31,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057648539] [2021-06-05 05:10:31,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:31,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:31,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:31,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057648539] [2021-06-05 05:10:31,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057648539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:31,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100994410] [2021-06-05 05:10:31,254 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:31,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:10:31,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:31,282 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:10:31,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:31,476 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 20 treesize of output 12 [2021-06-05 05:10:31,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:31,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:31,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:31,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:10:31,506 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:31,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100994410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:31,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:31,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:10:31,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487498685] [2021-06-05 05:10:31,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:10:31,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:31,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:10:31,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:10:31,507 INFO L87 Difference]: Start difference. First operand 1232 states and 2973 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:32,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:32,735 INFO L93 Difference]: Finished difference Result 2830 states and 6876 transitions. [2021-06-05 05:10:32,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:10:32,735 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:10:32,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:32,738 INFO L225 Difference]: With dead ends: 2830 [2021-06-05 05:10:32,738 INFO L226 Difference]: Without dead ends: 2766 [2021-06-05 05:10:32,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 930.4ms TimeCoverageRelationStatistics Valid=344, Invalid=1636, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:10:32,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2021-06-05 05:10:32,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 1215. [2021-06-05 05:10:32,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 2.412685337726524) internal successors, (2929), 1214 states have internal predecessors, (2929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:32,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 2929 transitions. [2021-06-05 05:10:32,752 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 2929 transitions. Word has length 30 [2021-06-05 05:10:32,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:32,752 INFO L482 AbstractCegarLoop]: Abstraction has 1215 states and 2929 transitions. [2021-06-05 05:10:32,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:32,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 2929 transitions. [2021-06-05 05:10:32,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:10:32,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:32,753 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:32,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable448,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:32,953 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:32,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:32,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1653788199, now seen corresponding path program 42 times [2021-06-05 05:10:32,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:32,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41917911] [2021-06-05 05:10:32,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:32,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:33,142 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:33,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:33,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41917911] [2021-06-05 05:10:33,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41917911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:33,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683930732] [2021-06-05 05:10:33,142 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:33,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:10:33,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:33,170 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:10:33,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:33,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:10:33,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:33,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:33,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:33,344 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:10:33,372 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:33,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683930732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:33,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:33,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:10:33,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617800686] [2021-06-05 05:10:33,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:10:33,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:33,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:10:33,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:10:33,373 INFO L87 Difference]: Start difference. First operand 1215 states and 2929 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:34,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:34,178 INFO L93 Difference]: Finished difference Result 2524 states and 6168 transitions. [2021-06-05 05:10:34,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:10:34,179 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:10:34,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:34,181 INFO L225 Difference]: With dead ends: 2524 [2021-06-05 05:10:34,181 INFO L226 Difference]: Without dead ends: 2514 [2021-06-05 05:10:34,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 581.6ms TimeCoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:10:34,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-06-05 05:10:34,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 1212. [2021-06-05 05:10:34,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 1211 states have (on average 2.4128819157720893) internal successors, (2922), 1211 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:34,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 2922 transitions. [2021-06-05 05:10:34,207 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 2922 transitions. Word has length 30 [2021-06-05 05:10:34,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:34,207 INFO L482 AbstractCegarLoop]: Abstraction has 1212 states and 2922 transitions. [2021-06-05 05:10:34,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:34,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 2922 transitions. [2021-06-05 05:10:34,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:10:34,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:34,208 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:34,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:34,408 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:34,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:34,409 INFO L82 PathProgramCache]: Analyzing trace with hash -2075383707, now seen corresponding path program 57 times [2021-06-05 05:10:34,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:34,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146742347] [2021-06-05 05:10:34,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:34,612 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:34,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:34,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146742347] [2021-06-05 05:10:34,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146742347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:34,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575192926] [2021-06-05 05:10:34,613 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:34,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:10:34,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:34,635 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:10:34,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:34,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 05:10:34,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:34,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:34,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:34,791 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:17 [2021-06-05 05:10:34,836 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:34,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575192926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:34,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:34,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 21 [2021-06-05 05:10:34,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329260228] [2021-06-05 05:10:34,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:10:34,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:34,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:10:34,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:10:34,837 INFO L87 Difference]: Start difference. First operand 1212 states and 2922 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:35,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:35,784 INFO L93 Difference]: Finished difference Result 2797 states and 6885 transitions. [2021-06-05 05:10:35,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:10:35,784 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:10:35,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:35,787 INFO L225 Difference]: With dead ends: 2797 [2021-06-05 05:10:35,787 INFO L226 Difference]: Without dead ends: 2786 [2021-06-05 05:10:35,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 753.2ms TimeCoverageRelationStatistics Valid=252, Invalid=1230, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:10:35,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2021-06-05 05:10:35,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 1237. [2021-06-05 05:10:35,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1236 states have (on average 2.4174757281553396) internal successors, (2988), 1236 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:35,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 2988 transitions. [2021-06-05 05:10:35,801 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 2988 transitions. Word has length 30 [2021-06-05 05:10:35,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:35,801 INFO L482 AbstractCegarLoop]: Abstraction has 1237 states and 2988 transitions. [2021-06-05 05:10:35,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:35,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 2988 transitions. [2021-06-05 05:10:35,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:10:35,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:35,802 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:36,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:36,003 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:36,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:36,003 INFO L82 PathProgramCache]: Analyzing trace with hash -318982657, now seen corresponding path program 58 times [2021-06-05 05:10:36,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:36,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067096076] [2021-06-05 05:10:36,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:36,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:36,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:36,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:36,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067096076] [2021-06-05 05:10:36,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067096076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:36,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260643811] [2021-06-05 05:10:36,188 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:36,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:10:36,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:36,210 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:36,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:36,335 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 25 treesize of output 15 [2021-06-05 05:10:36,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:36,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:36,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:36,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:10:36,361 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:36,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260643811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:36,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:36,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 05:10:36,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332404727] [2021-06-05 05:10:36,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:10:36,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:36,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:10:36,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:10:36,362 INFO L87 Difference]: Start difference. First operand 1237 states and 2988 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:37,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:37,286 INFO L93 Difference]: Finished difference Result 2899 states and 7154 transitions. [2021-06-05 05:10:37,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:10:37,286 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:10:37,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:37,289 INFO L225 Difference]: With dead ends: 2899 [2021-06-05 05:10:37,289 INFO L226 Difference]: Without dead ends: 2879 [2021-06-05 05:10:37,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 746.5ms TimeCoverageRelationStatistics Valid=270, Invalid=1136, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:10:37,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2879 states. [2021-06-05 05:10:37,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2879 to 1231. [2021-06-05 05:10:37,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1230 states have (on average 2.415447154471545) internal successors, (2971), 1230 states have internal predecessors, (2971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:37,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 2971 transitions. [2021-06-05 05:10:37,304 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 2971 transitions. Word has length 30 [2021-06-05 05:10:37,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:37,304 INFO L482 AbstractCegarLoop]: Abstraction has 1231 states and 2971 transitions. [2021-06-05 05:10:37,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:37,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 2971 transitions. [2021-06-05 05:10:37,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:10:37,306 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:37,306 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:37,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable451 [2021-06-05 05:10:37,506 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:37,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:37,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1890322569, now seen corresponding path program 59 times [2021-06-05 05:10:37,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:37,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996440298] [2021-06-05 05:10:37,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:37,708 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:37,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:37,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996440298] [2021-06-05 05:10:37,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996440298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:37,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334957120] [2021-06-05 05:10:37,708 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:37,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:10:37,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:37,731 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:10:37,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:37,882 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 28 treesize of output 16 [2021-06-05 05:10:37,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:37,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:37,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:37,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:10:37,907 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:37,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334957120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:37,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:37,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:10:37,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205340239] [2021-06-05 05:10:37,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:10:37,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:37,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:10:37,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:10:37,907 INFO L87 Difference]: Start difference. First operand 1231 states and 2971 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:38,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:38,897 INFO L93 Difference]: Finished difference Result 2671 states and 6523 transitions. [2021-06-05 05:10:38,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:10:38,897 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:10:38,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:38,899 INFO L225 Difference]: With dead ends: 2671 [2021-06-05 05:10:38,899 INFO L226 Difference]: Without dead ends: 2648 [2021-06-05 05:10:38,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 741.3ms TimeCoverageRelationStatistics Valid=266, Invalid=1066, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:10:38,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2021-06-05 05:10:38,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 1216. [2021-06-05 05:10:38,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1215 states have (on average 2.4123456790123456) internal successors, (2931), 1215 states have internal predecessors, (2931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:38,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 2931 transitions. [2021-06-05 05:10:38,913 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 2931 transitions. Word has length 30 [2021-06-05 05:10:38,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:38,913 INFO L482 AbstractCegarLoop]: Abstraction has 1216 states and 2931 transitions. [2021-06-05 05:10:38,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:38,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 2931 transitions. [2021-06-05 05:10:38,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:10:38,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:38,914 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:39,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-06-05 05:10:39,114 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:39,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:39,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1091399703, now seen corresponding path program 60 times [2021-06-05 05:10:39,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:39,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301589794] [2021-06-05 05:10:39,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:39,316 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:39,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:39,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301589794] [2021-06-05 05:10:39,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301589794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:39,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117946303] [2021-06-05 05:10:39,317 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:39,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:10:39,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:39,339 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:10:39,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:39,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:39,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 05:10:39,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:39,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:39,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:39,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:32 [2021-06-05 05:10:39,612 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:39,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117946303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:39,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:39,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2021-06-05 05:10:39,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453006978] [2021-06-05 05:10:39,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:10:39,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:39,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:10:39,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:10:39,613 INFO L87 Difference]: Start difference. First operand 1216 states and 2931 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:40,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:40,292 INFO L93 Difference]: Finished difference Result 2623 states and 6432 transitions. [2021-06-05 05:10:40,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:10:40,292 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:10:40,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:40,295 INFO L225 Difference]: With dead ends: 2623 [2021-06-05 05:10:40,295 INFO L226 Difference]: Without dead ends: 2613 [2021-06-05 05:10:40,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 637.3ms TimeCoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:10:40,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2021-06-05 05:10:40,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 1213. [2021-06-05 05:10:40,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1212 states have (on average 2.4125412541254128) internal successors, (2924), 1212 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:40,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 2924 transitions. [2021-06-05 05:10:40,307 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 2924 transitions. Word has length 30 [2021-06-05 05:10:40,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:40,308 INFO L482 AbstractCegarLoop]: Abstraction has 1213 states and 2924 transitions. [2021-06-05 05:10:40,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:40,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 2924 transitions. [2021-06-05 05:10:40,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:10:40,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:40,309 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:40,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-06-05 05:10:40,509 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:40,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:40,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1904321965, now seen corresponding path program 61 times [2021-06-05 05:10:40,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:40,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693073077] [2021-06-05 05:10:40,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:40,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:40,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:40,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693073077] [2021-06-05 05:10:40,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693073077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:40,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458073751] [2021-06-05 05:10:40,733 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:40,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:40,754 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:40,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:40,878 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 25 treesize of output 15 [2021-06-05 05:10:40,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:40,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:40,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:40,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:10:40,905 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:40,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458073751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:40,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:40,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 05:10:40,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733779100] [2021-06-05 05:10:40,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:10:40,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:40,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:10:40,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:10:40,909 INFO L87 Difference]: Start difference. First operand 1213 states and 2924 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:41,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:41,928 INFO L93 Difference]: Finished difference Result 2690 states and 6621 transitions. [2021-06-05 05:10:41,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:10:41,928 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:10:41,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:41,930 INFO L225 Difference]: With dead ends: 2690 [2021-06-05 05:10:41,930 INFO L226 Difference]: Without dead ends: 2679 [2021-06-05 05:10:41,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 855.2ms TimeCoverageRelationStatistics Valid=275, Invalid=1285, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:10:41,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2679 states. [2021-06-05 05:10:41,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2679 to 1231. [2021-06-05 05:10:41,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1230 states have (on average 2.4138211382113823) internal successors, (2969), 1230 states have internal predecessors, (2969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:41,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 2969 transitions. [2021-06-05 05:10:41,949 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 2969 transitions. Word has length 30 [2021-06-05 05:10:41,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:41,949 INFO L482 AbstractCegarLoop]: Abstraction has 1231 states and 2969 transitions. [2021-06-05 05:10:41,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:41,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 2969 transitions. [2021-06-05 05:10:41,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:10:41,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:41,950 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:42,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-06-05 05:10:42,150 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:42,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:42,151 INFO L82 PathProgramCache]: Analyzing trace with hash -634244281, now seen corresponding path program 62 times [2021-06-05 05:10:42,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:42,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165441661] [2021-06-05 05:10:42,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:42,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:42,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:42,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165441661] [2021-06-05 05:10:42,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165441661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:42,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958544101] [2021-06-05 05:10:42,375 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:42,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:42,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:42,397 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:10:42,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:42,570 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:42,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-06-05 05:10:42,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:10:42,609 INFO L628 ElimStorePlain]: treesize reduction 10, result has 84.8 percent of original size [2021-06-05 05:10:42,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:42,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:56 [2021-06-05 05:10:42,702 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:42,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958544101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:42,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:42,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 05:10:42,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330808896] [2021-06-05 05:10:42,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:10:42,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:42,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:10:42,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:10:42,703 INFO L87 Difference]: Start difference. First operand 1231 states and 2969 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:43,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:43,871 INFO L93 Difference]: Finished difference Result 2727 states and 6736 transitions. [2021-06-05 05:10:43,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:10:43,871 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:10:43,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:43,874 INFO L225 Difference]: With dead ends: 2727 [2021-06-05 05:10:43,874 INFO L226 Difference]: Without dead ends: 2715 [2021-06-05 05:10:43,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 970.9ms TimeCoverageRelationStatistics Valid=310, Invalid=1330, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:10:43,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2715 states. [2021-06-05 05:10:43,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2715 to 1233. [2021-06-05 05:10:43,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1232 states have (on average 2.414772727272727) internal successors, (2975), 1232 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:43,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 2975 transitions. [2021-06-05 05:10:43,888 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 2975 transitions. Word has length 30 [2021-06-05 05:10:43,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:43,888 INFO L482 AbstractCegarLoop]: Abstraction has 1233 states and 2975 transitions. [2021-06-05 05:10:43,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:43,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 2975 transitions. [2021-06-05 05:10:43,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:10:43,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:43,889 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:44,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:44,089 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:44,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:44,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1552194471, now seen corresponding path program 63 times [2021-06-05 05:10:44,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:44,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168223637] [2021-06-05 05:10:44,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:44,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:44,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:44,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168223637] [2021-06-05 05:10:44,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168223637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:44,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326112185] [2021-06-05 05:10:44,321 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:44,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:10:44,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:44,343 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:44,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:44,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 05:10:44,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:44,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:44,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:44,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:10:44,504 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:44,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326112185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:44,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:44,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:10:44,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856884892] [2021-06-05 05:10:44,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:10:44,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:44,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:10:44,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:10:44,505 INFO L87 Difference]: Start difference. First operand 1233 states and 2975 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:45,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:45,775 INFO L93 Difference]: Finished difference Result 3049 states and 7511 transitions. [2021-06-05 05:10:45,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:10:45,775 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:10:45,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:45,778 INFO L225 Difference]: With dead ends: 3049 [2021-06-05 05:10:45,778 INFO L226 Difference]: Without dead ends: 3027 [2021-06-05 05:10:45,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 1157.8ms TimeCoverageRelationStatistics Valid=449, Invalid=1903, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:10:45,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3027 states. [2021-06-05 05:10:45,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3027 to 1225. [2021-06-05 05:10:45,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1225 states, 1224 states have (on average 2.4133986928104574) internal successors, (2954), 1224 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:45,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 2954 transitions. [2021-06-05 05:10:45,792 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 2954 transitions. Word has length 30 [2021-06-05 05:10:45,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:45,792 INFO L482 AbstractCegarLoop]: Abstraction has 1225 states and 2954 transitions. [2021-06-05 05:10:45,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:45,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 2954 transitions. [2021-06-05 05:10:45,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:10:45,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:45,793 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:45,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-05 05:10:45,993 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:45,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:45,994 INFO L82 PathProgramCache]: Analyzing trace with hash 894709787, now seen corresponding path program 64 times [2021-06-05 05:10:45,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:45,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789706884] [2021-06-05 05:10:45,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:45,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:46,223 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:46,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:46,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789706884] [2021-06-05 05:10:46,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789706884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:46,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232628282] [2021-06-05 05:10:46,223 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:46,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:10:46,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:46,246 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:46,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:46,396 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 28 treesize of output 16 [2021-06-05 05:10:46,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:46,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:46,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:46,401 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:10 [2021-06-05 05:10:46,420 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:46,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232628282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:46,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:46,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:10:46,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756292126] [2021-06-05 05:10:46,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:10:46,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:46,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:10:46,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:10:46,421 INFO L87 Difference]: Start difference. First operand 1225 states and 2954 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:47,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:47,351 INFO L93 Difference]: Finished difference Result 2509 states and 6155 transitions. [2021-06-05 05:10:47,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:10:47,351 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:10:47,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:47,354 INFO L225 Difference]: With dead ends: 2509 [2021-06-05 05:10:47,354 INFO L226 Difference]: Without dead ends: 2486 [2021-06-05 05:10:47,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 788.7ms TimeCoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:10:47,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2021-06-05 05:10:47,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 1216. [2021-06-05 05:10:47,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1215 states have (on average 2.4123456790123456) internal successors, (2931), 1215 states have internal predecessors, (2931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:47,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 2931 transitions. [2021-06-05 05:10:47,371 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 2931 transitions. Word has length 30 [2021-06-05 05:10:47,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:47,371 INFO L482 AbstractCegarLoop]: Abstraction has 1216 states and 2931 transitions. [2021-06-05 05:10:47,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:47,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 2931 transitions. [2021-06-05 05:10:47,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:10:47,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:47,373 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:47,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:47,573 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:47,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:47,573 INFO L82 PathProgramCache]: Analyzing trace with hash 577864591, now seen corresponding path program 65 times [2021-06-05 05:10:47,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:47,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175915593] [2021-06-05 05:10:47,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:47,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:47,811 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:47,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:47,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175915593] [2021-06-05 05:10:47,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175915593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:47,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582457713] [2021-06-05 05:10:47,811 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:47,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:10:47,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:47,834 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:10:47,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:47,956 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 25 treesize of output 15 [2021-06-05 05:10:47,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:47,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:47,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:47,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:10:47,985 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:47,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582457713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:47,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:47,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 05:10:47,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277538600] [2021-06-05 05:10:47,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:10:47,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:47,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:10:47,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:10:47,985 INFO L87 Difference]: Start difference. First operand 1216 states and 2931 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:49,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:49,148 INFO L93 Difference]: Finished difference Result 2693 states and 6622 transitions. [2021-06-05 05:10:49,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:10:49,149 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:10:49,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:49,151 INFO L225 Difference]: With dead ends: 2693 [2021-06-05 05:10:49,151 INFO L226 Difference]: Without dead ends: 2682 [2021-06-05 05:10:49,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 975.1ms TimeCoverageRelationStatistics Valid=289, Invalid=1433, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:10:49,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2021-06-05 05:10:49,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 1225. [2021-06-05 05:10:49,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1225 states, 1224 states have (on average 2.411764705882353) internal successors, (2952), 1224 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:49,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 2952 transitions. [2021-06-05 05:10:49,165 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 2952 transitions. Word has length 30 [2021-06-05 05:10:49,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:49,165 INFO L482 AbstractCegarLoop]: Abstraction has 1225 states and 2952 transitions. [2021-06-05 05:10:49,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:49,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 2952 transitions. [2021-06-05 05:10:49,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:10:49,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:49,166 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:49,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-06-05 05:10:49,367 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:49,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:49,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1960701655, now seen corresponding path program 66 times [2021-06-05 05:10:49,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:49,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569288826] [2021-06-05 05:10:49,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:49,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:49,610 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:49,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:49,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569288826] [2021-06-05 05:10:49,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569288826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:49,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490222673] [2021-06-05 05:10:49,610 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:49,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:10:49,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:49,633 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:10:49,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:49,757 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 25 treesize of output 15 [2021-06-05 05:10:49,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:49,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:49,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:49,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:10:49,786 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:49,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490222673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:49,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:49,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 05:10:49,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121693502] [2021-06-05 05:10:49,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:10:49,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:49,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:10:49,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:10:49,786 INFO L87 Difference]: Start difference. First operand 1225 states and 2952 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:50,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:50,961 INFO L93 Difference]: Finished difference Result 2824 states and 6974 transitions. [2021-06-05 05:10:50,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:10:50,962 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:10:50,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:50,964 INFO L225 Difference]: With dead ends: 2824 [2021-06-05 05:10:50,964 INFO L226 Difference]: Without dead ends: 2804 [2021-06-05 05:10:50,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1025.7ms TimeCoverageRelationStatistics Valid=327, Invalid=1565, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:10:50,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2804 states. [2021-06-05 05:10:50,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 1218. [2021-06-05 05:10:50,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 2.4124897288414133) internal successors, (2936), 1217 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:50,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 2936 transitions. [2021-06-05 05:10:50,978 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 2936 transitions. Word has length 30 [2021-06-05 05:10:50,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:50,978 INFO L482 AbstractCegarLoop]: Abstraction has 1218 states and 2936 transitions. [2021-06-05 05:10:50,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:50,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 2936 transitions. [2021-06-05 05:10:50,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:10:50,979 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:50,979 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:51,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:51,179 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:51,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:51,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1846725739, now seen corresponding path program 67 times [2021-06-05 05:10:51,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:51,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088968051] [2021-06-05 05:10:51,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:51,384 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:51,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:51,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088968051] [2021-06-05 05:10:51,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088968051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:51,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693741385] [2021-06-05 05:10:51,384 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:51,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:51,405 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:51,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:51,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-05 05:10:51,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:51,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:51,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:51,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-06-05 05:10:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:51,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693741385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:51,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:51,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-06-05 05:10:51,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079656926] [2021-06-05 05:10:51,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:10:51,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:51,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:10:51,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:10:51,589 INFO L87 Difference]: Start difference. First operand 1218 states and 2936 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:52,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:52,926 INFO L93 Difference]: Finished difference Result 2573 states and 6331 transitions. [2021-06-05 05:10:52,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:10:52,926 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 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 30 [2021-06-05 05:10:52,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:52,928 INFO L225 Difference]: With dead ends: 2573 [2021-06-05 05:10:52,928 INFO L226 Difference]: Without dead ends: 2564 [2021-06-05 05:10:52,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 824.1ms TimeCoverageRelationStatistics Valid=228, Invalid=1494, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:10:52,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2564 states. [2021-06-05 05:10:52,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2564 to 1211. [2021-06-05 05:10:52,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1210 states have (on average 2.4132231404958677) internal successors, (2920), 1210 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:52,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 2920 transitions. [2021-06-05 05:10:52,942 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 2920 transitions. Word has length 30 [2021-06-05 05:10:52,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:52,942 INFO L482 AbstractCegarLoop]: Abstraction has 1211 states and 2920 transitions. [2021-06-05 05:10:52,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:52,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 2920 transitions. [2021-06-05 05:10:52,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:10:52,943 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:52,943 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:53,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:53,144 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:53,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:53,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1325848085, now seen corresponding path program 68 times [2021-06-05 05:10:53,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:53,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196477340] [2021-06-05 05:10:53,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:53,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:53,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:53,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:53,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196477340] [2021-06-05 05:10:53,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196477340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:53,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707224528] [2021-06-05 05:10:53,398 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:53,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:53,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:53,420 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:53,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:53,540 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 25 treesize of output 15 [2021-06-05 05:10:53,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:53,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:53,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:53,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:10:53,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:53,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707224528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:53,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:53,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 05:10:53,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901529415] [2021-06-05 05:10:53,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:10:53,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:53,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:10:53,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:10:53,582 INFO L87 Difference]: Start difference. First operand 1211 states and 2920 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:55,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:55,535 INFO L93 Difference]: Finished difference Result 2900 states and 7078 transitions. [2021-06-05 05:10:55,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:10:55,535 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:10:55,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:55,538 INFO L225 Difference]: With dead ends: 2900 [2021-06-05 05:10:55,538 INFO L226 Difference]: Without dead ends: 2882 [2021-06-05 05:10:55,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 1543.3ms TimeCoverageRelationStatistics Valid=504, Invalid=2466, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:10:55,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2882 states. [2021-06-05 05:10:55,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2882 to 1185. [2021-06-05 05:10:55,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 1184 states have (on average 2.410472972972973) internal successors, (2854), 1184 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:55,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 2854 transitions. [2021-06-05 05:10:55,552 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 2854 transitions. Word has length 30 [2021-06-05 05:10:55,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:55,552 INFO L482 AbstractCegarLoop]: Abstraction has 1185 states and 2854 transitions. [2021-06-05 05:10:55,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:55,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 2854 transitions. [2021-06-05 05:10:55,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:10:55,553 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:55,553 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:55,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:55,754 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:55,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:55,754 INFO L82 PathProgramCache]: Analyzing trace with hash -585794405, now seen corresponding path program 43 times [2021-06-05 05:10:55,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:55,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23189286] [2021-06-05 05:10:55,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:55,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:55,963 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:55,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:55,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23189286] [2021-06-05 05:10:55,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23189286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:55,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119416897] [2021-06-05 05:10:55,963 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:55,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:55,985 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:55,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:56,192 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-06-05 05:10:56,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 62 [2021-06-05 05:10:56,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:56,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:56,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:56,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:90, output treesize:19 [2021-06-05 05:10:56,225 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:56,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119416897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:56,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:56,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 05:10:56,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779736254] [2021-06-05 05:10:56,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:10:56,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:56,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:10:56,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:10:56,226 INFO L87 Difference]: Start difference. First operand 1185 states and 2854 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:57,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:57,838 INFO L93 Difference]: Finished difference Result 2605 states and 6398 transitions. [2021-06-05 05:10:57,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:10:57,838 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:10:57,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:57,841 INFO L225 Difference]: With dead ends: 2605 [2021-06-05 05:10:57,841 INFO L226 Difference]: Without dead ends: 2596 [2021-06-05 05:10:57,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1243.6ms TimeCoverageRelationStatistics Valid=366, Invalid=2084, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:10:57,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-06-05 05:10:57,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1172. [2021-06-05 05:10:57,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1172 states, 1171 states have (on average 2.4064901793339026) internal successors, (2818), 1171 states have internal predecessors, (2818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:57,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 2818 transitions. [2021-06-05 05:10:57,854 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 2818 transitions. Word has length 30 [2021-06-05 05:10:57,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:57,855 INFO L482 AbstractCegarLoop]: Abstraction has 1172 states and 2818 transitions. [2021-06-05 05:10:57,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:57,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 2818 transitions. [2021-06-05 05:10:57,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:10:57,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:57,856 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:58,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:58,056 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:58,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:58,056 INFO L82 PathProgramCache]: Analyzing trace with hash -118748835, now seen corresponding path program 44 times [2021-06-05 05:10:58,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:58,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438166601] [2021-06-05 05:10:58,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:58,279 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:58,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:58,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438166601] [2021-06-05 05:10:58,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438166601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:58,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425160519] [2021-06-05 05:10:58,280 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:58,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:58,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:58,303 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:10:58,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:58,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:10:58,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:58,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:58,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:10:58,446 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:10:58,479 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:58,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425160519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:58,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:58,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 05:10:58,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721526767] [2021-06-05 05:10:58,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:10:58,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:58,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:10:58,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:10:58,480 INFO L87 Difference]: Start difference. First operand 1172 states and 2818 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:01,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:01,071 INFO L93 Difference]: Finished difference Result 2848 states and 6937 transitions. [2021-06-05 05:11:01,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 05:11:01,072 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:11:01,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:01,074 INFO L225 Difference]: With dead ends: 2848 [2021-06-05 05:11:01,074 INFO L226 Difference]: Without dead ends: 2832 [2021-06-05 05:11:01,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 2252.7ms TimeCoverageRelationStatistics Valid=698, Invalid=3724, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 05:11:01,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-06-05 05:11:01,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 1151. [2021-06-05 05:11:01,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 1150 states have (on average 2.4043478260869566) internal successors, (2765), 1150 states have internal predecessors, (2765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:01,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 2765 transitions. [2021-06-05 05:11:01,087 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 2765 transitions. Word has length 30 [2021-06-05 05:11:01,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:01,088 INFO L482 AbstractCegarLoop]: Abstraction has 1151 states and 2765 transitions. [2021-06-05 05:11:01,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:01,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 2765 transitions. [2021-06-05 05:11:01,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:11:01,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:01,089 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:01,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable473 [2021-06-05 05:11:01,289 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:01,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:01,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1468185983, now seen corresponding path program 69 times [2021-06-05 05:11:01,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:01,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864769986] [2021-06-05 05:11:01,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:01,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:01,548 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:01,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:01,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864769986] [2021-06-05 05:11:01,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864769986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:01,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66233559] [2021-06-05 05:11:01,549 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:01,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:11:01,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:01,572 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:01,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:01,726 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 25 treesize of output 15 [2021-06-05 05:11:01,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:01,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:01,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:01,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-06-05 05:11:01,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:01,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66233559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:01,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:01,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:11:01,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953667763] [2021-06-05 05:11:01,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:11:01,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:01,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:11:01,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:11:01,752 INFO L87 Difference]: Start difference. First operand 1151 states and 2765 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:04,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:04,770 INFO L93 Difference]: Finished difference Result 2564 states and 6222 transitions. [2021-06-05 05:11:04,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 05:11:04,770 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:11:04,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:04,773 INFO L225 Difference]: With dead ends: 2564 [2021-06-05 05:11:04,773 INFO L226 Difference]: Without dead ends: 2539 [2021-06-05 05:11:04,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 2426.8ms TimeCoverageRelationStatistics Valid=705, Invalid=3717, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 05:11:04,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2539 states. [2021-06-05 05:11:04,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2539 to 1168. [2021-06-05 05:11:04,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 2.405312767780634) internal successors, (2807), 1167 states have internal predecessors, (2807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:04,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 2807 transitions. [2021-06-05 05:11:04,786 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 2807 transitions. Word has length 30 [2021-06-05 05:11:04,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:04,786 INFO L482 AbstractCegarLoop]: Abstraction has 1168 states and 2807 transitions. [2021-06-05 05:11:04,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:04,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 2807 transitions. [2021-06-05 05:11:04,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:11:04,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:04,787 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:04,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-06-05 05:11:04,987 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:04,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:04,988 INFO L82 PathProgramCache]: Analyzing trace with hash -692414559, now seen corresponding path program 70 times [2021-06-05 05:11:04,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:04,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665376014] [2021-06-05 05:11:04,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:04,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:05,223 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:05,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:05,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665376014] [2021-06-05 05:11:05,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665376014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:05,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289334286] [2021-06-05 05:11:05,224 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:05,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:11:05,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:05,245 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:05,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:05,381 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 25 treesize of output 15 [2021-06-05 05:11:05,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:05,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:05,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:05,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:11:05,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:05,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289334286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:05,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:05,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:11:05,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334444704] [2021-06-05 05:11:05,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:11:05,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:05,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:11:05,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:11:05,426 INFO L87 Difference]: Start difference. First operand 1168 states and 2807 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:09,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:09,422 INFO L93 Difference]: Finished difference Result 3160 states and 7720 transitions. [2021-06-05 05:11:09,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 05:11:09,423 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:11:09,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:09,425 INFO L225 Difference]: With dead ends: 3160 [2021-06-05 05:11:09,425 INFO L226 Difference]: Without dead ends: 3145 [2021-06-05 05:11:09,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2373 ImplicationChecksByTransitivity, 3342.9ms TimeCoverageRelationStatistics Valid=1129, Invalid=6011, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 05:11:09,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3145 states. [2021-06-05 05:11:09,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3145 to 1180. [2021-06-05 05:11:09,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 2.4062765055131465) internal successors, (2837), 1179 states have internal predecessors, (2837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:09,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 2837 transitions. [2021-06-05 05:11:09,440 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 2837 transitions. Word has length 30 [2021-06-05 05:11:09,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:09,440 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 2837 transitions. [2021-06-05 05:11:09,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:09,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 2837 transitions. [2021-06-05 05:11:09,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:11:09,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:09,441 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:09,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-06-05 05:11:09,642 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:09,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:09,642 INFO L82 PathProgramCache]: Analyzing trace with hash -27211391, now seen corresponding path program 71 times [2021-06-05 05:11:09,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:09,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386027206] [2021-06-05 05:11:09,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:09,884 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:09,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:09,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386027206] [2021-06-05 05:11:09,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386027206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:09,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272817534] [2021-06-05 05:11:09,884 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:09,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:11:09,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:09,906 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:09,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:10,034 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 25 treesize of output 15 [2021-06-05 05:11:10,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:10,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:10,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:10,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:11:10,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:10,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272817534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:10,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:10,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 05:11:10,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794221216] [2021-06-05 05:11:10,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:11:10,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:10,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:11:10,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:11:10,062 INFO L87 Difference]: Start difference. First operand 1180 states and 2837 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:12,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:12,818 INFO L93 Difference]: Finished difference Result 2821 states and 6912 transitions. [2021-06-05 05:11:12,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:11:12,818 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:11:12,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:12,821 INFO L225 Difference]: With dead ends: 2821 [2021-06-05 05:11:12,821 INFO L226 Difference]: Without dead ends: 2804 [2021-06-05 05:11:12,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 2086.4ms TimeCoverageRelationStatistics Valid=594, Invalid=3066, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:11:12,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2804 states. [2021-06-05 05:11:12,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 1171. [2021-06-05 05:11:12,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 2.404273504273504) internal successors, (2813), 1170 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:12,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 2813 transitions. [2021-06-05 05:11:12,834 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 2813 transitions. Word has length 30 [2021-06-05 05:11:12,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:12,835 INFO L482 AbstractCegarLoop]: Abstraction has 1171 states and 2813 transitions. [2021-06-05 05:11:12,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:12,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 2813 transitions. [2021-06-05 05:11:12,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:11:12,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:12,836 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:13,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-06-05 05:11:13,036 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:13,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:13,036 INFO L82 PathProgramCache]: Analyzing trace with hash 971041919, now seen corresponding path program 72 times [2021-06-05 05:11:13,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:13,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316119756] [2021-06-05 05:11:13,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:13,274 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:13,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:13,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316119756] [2021-06-05 05:11:13,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316119756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:13,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040522490] [2021-06-05 05:11:13,274 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:13,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:11:13,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:13,298 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:13,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:13,448 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 25 treesize of output 15 [2021-06-05 05:11:13,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:13,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:13,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:13,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-06-05 05:11:13,474 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:13,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040522490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:13,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:13,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:11:13,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470085924] [2021-06-05 05:11:13,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:11:13,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:13,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:11:13,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:11:13,474 INFO L87 Difference]: Start difference. First operand 1171 states and 2813 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:16,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:16,645 INFO L93 Difference]: Finished difference Result 2554 states and 6198 transitions. [2021-06-05 05:11:16,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 05:11:16,645 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:11:16,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:16,648 INFO L225 Difference]: With dead ends: 2554 [2021-06-05 05:11:16,648 INFO L226 Difference]: Without dead ends: 2535 [2021-06-05 05:11:16,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 2505.4ms TimeCoverageRelationStatistics Valid=739, Invalid=3817, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 05:11:16,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2535 states. [2021-06-05 05:11:16,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2535 to 1167. [2021-06-05 05:11:16,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1166 states have (on average 2.4056603773584904) internal successors, (2805), 1166 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:16,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 2805 transitions. [2021-06-05 05:11:16,663 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 2805 transitions. Word has length 30 [2021-06-05 05:11:16,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:16,663 INFO L482 AbstractCegarLoop]: Abstraction has 1167 states and 2805 transitions. [2021-06-05 05:11:16,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:16,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 2805 transitions. [2021-06-05 05:11:16,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:11:16,665 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:16,665 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:16,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-06-05 05:11:16,865 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:16,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:16,865 INFO L82 PathProgramCache]: Analyzing trace with hash 580935999, now seen corresponding path program 73 times [2021-06-05 05:11:16,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:16,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429477749] [2021-06-05 05:11:16,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:17,107 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:17,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:17,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429477749] [2021-06-05 05:11:17,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429477749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:17,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506539817] [2021-06-05 05:11:17,107 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:17,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:17,129 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:17,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:17,249 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 25 treesize of output 15 [2021-06-05 05:11:17,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:17,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:17,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:17,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:11:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:17,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506539817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:17,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:17,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 05:11:17,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900306787] [2021-06-05 05:11:17,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:11:17,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:17,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:11:17,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:11:17,278 INFO L87 Difference]: Start difference. First operand 1167 states and 2805 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:18,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:18,768 INFO L93 Difference]: Finished difference Result 3143 states and 7792 transitions. [2021-06-05 05:11:18,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:11:18,769 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 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 30 [2021-06-05 05:11:18,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:18,771 INFO L225 Difference]: With dead ends: 3143 [2021-06-05 05:11:18,771 INFO L226 Difference]: Without dead ends: 3130 [2021-06-05 05:11:18,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 1250.6ms TimeCoverageRelationStatistics Valid=408, Invalid=1848, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:11:18,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3130 states. [2021-06-05 05:11:18,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3130 to 1176. [2021-06-05 05:11:18,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 2.4051063829787234) internal successors, (2826), 1175 states have internal predecessors, (2826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:18,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 2826 transitions. [2021-06-05 05:11:18,786 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 2826 transitions. Word has length 30 [2021-06-05 05:11:18,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:18,787 INFO L482 AbstractCegarLoop]: Abstraction has 1176 states and 2826 transitions. [2021-06-05 05:11:18,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:18,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 2826 transitions. [2021-06-05 05:11:18,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:11:18,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:18,788 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:18,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-05 05:11:18,988 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:18,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:18,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1957630247, now seen corresponding path program 74 times [2021-06-05 05:11:18,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:18,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420601126] [2021-06-05 05:11:18,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:18,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:19,221 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:19,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:19,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420601126] [2021-06-05 05:11:19,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420601126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:19,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620737281] [2021-06-05 05:11:19,221 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:19,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:19,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:19,243 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:19,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:19,357 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 25 treesize of output 15 [2021-06-05 05:11:19,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:19,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:19,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:19,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:11:19,385 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:19,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620737281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:19,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:19,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 05:11:19,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11127489] [2021-06-05 05:11:19,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:11:19,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:19,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:11:19,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:11:19,386 INFO L87 Difference]: Start difference. First operand 1176 states and 2826 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:20,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:20,776 INFO L93 Difference]: Finished difference Result 2923 states and 7239 transitions. [2021-06-05 05:11:20,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:11:20,776 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 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 30 [2021-06-05 05:11:20,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:20,779 INFO L225 Difference]: With dead ends: 2923 [2021-06-05 05:11:20,779 INFO L226 Difference]: Without dead ends: 2906 [2021-06-05 05:11:20,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1132.4ms TimeCoverageRelationStatistics Valid=385, Invalid=1595, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:11:20,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2906 states. [2021-06-05 05:11:20,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2906 to 1167. [2021-06-05 05:11:20,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1166 states have (on average 2.4039451114922814) internal successors, (2803), 1166 states have internal predecessors, (2803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:20,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 2803 transitions. [2021-06-05 05:11:20,797 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 2803 transitions. Word has length 30 [2021-06-05 05:11:20,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:20,797 INFO L482 AbstractCegarLoop]: Abstraction has 1167 states and 2803 transitions. [2021-06-05 05:11:20,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:20,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 2803 transitions. [2021-06-05 05:11:20,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:11:20,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:20,798 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:20,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:20,999 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:20,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:20,999 INFO L82 PathProgramCache]: Analyzing trace with hash -428676179, now seen corresponding path program 75 times [2021-06-05 05:11:20,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:20,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800892571] [2021-06-05 05:11:20,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:21,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:21,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:21,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:21,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800892571] [2021-06-05 05:11:21,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800892571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:21,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469786063] [2021-06-05 05:11:21,230 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:21,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:11:21,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:21,253 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:11:21,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:21,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:11:21,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:21,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 05:11:21,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:21,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:21,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:21,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:10 [2021-06-05 05:11:21,511 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:21,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469786063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:21,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:21,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 05:11:21,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103278701] [2021-06-05 05:11:21,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:11:21,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:21,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:11:21,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:11:21,512 INFO L87 Difference]: Start difference. First operand 1167 states and 2803 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:22,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:22,706 INFO L93 Difference]: Finished difference Result 2453 states and 6052 transitions. [2021-06-05 05:11:22,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:11:22,707 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 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 30 [2021-06-05 05:11:22,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:22,709 INFO L225 Difference]: With dead ends: 2453 [2021-06-05 05:11:22,709 INFO L226 Difference]: Without dead ends: 2443 [2021-06-05 05:11:22,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 882.4ms TimeCoverageRelationStatistics Valid=252, Invalid=1308, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:11:22,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2443 states. [2021-06-05 05:11:22,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2443 to 1158. [2021-06-05 05:11:22,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 2.4019014693172) internal successors, (2779), 1157 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:22,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 2779 transitions. [2021-06-05 05:11:22,721 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 2779 transitions. Word has length 30 [2021-06-05 05:11:22,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:22,721 INFO L482 AbstractCegarLoop]: Abstraction has 1158 states and 2779 transitions. [2021-06-05 05:11:22,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:22,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 2779 transitions. [2021-06-05 05:11:22,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:11:22,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:22,722 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:22,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable480 [2021-06-05 05:11:22,923 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:22,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:22,923 INFO L82 PathProgramCache]: Analyzing trace with hash 645569505, now seen corresponding path program 76 times [2021-06-05 05:11:22,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:22,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383106062] [2021-06-05 05:11:22,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:22,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:23,178 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:23,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:23,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383106062] [2021-06-05 05:11:23,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383106062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:23,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65953563] [2021-06-05 05:11:23,178 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:23,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:11:23,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:23,202 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:23,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:23,320 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 25 treesize of output 15 [2021-06-05 05:11:23,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:23,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:23,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:23,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:11:23,349 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:23,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65953563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:23,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:23,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 05:11:23,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318219490] [2021-06-05 05:11:23,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:11:23,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:23,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:11:23,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:11:23,350 INFO L87 Difference]: Start difference. First operand 1158 states and 2779 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:25,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:25,114 INFO L93 Difference]: Finished difference Result 2761 states and 6788 transitions. [2021-06-05 05:11:25,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 05:11:25,115 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 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 30 [2021-06-05 05:11:25,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:25,117 INFO L225 Difference]: With dead ends: 2761 [2021-06-05 05:11:25,117 INFO L226 Difference]: Without dead ends: 2748 [2021-06-05 05:11:25,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 1508.6ms TimeCoverageRelationStatistics Valid=438, Invalid=2318, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:11:25,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2748 states. [2021-06-05 05:11:25,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2748 to 1170. [2021-06-05 05:11:25,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 2.402908468776732) internal successors, (2809), 1169 states have internal predecessors, (2809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:25,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 2809 transitions. [2021-06-05 05:11:25,131 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 2809 transitions. Word has length 30 [2021-06-05 05:11:25,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:25,131 INFO L482 AbstractCegarLoop]: Abstraction has 1170 states and 2809 transitions. [2021-06-05 05:11:25,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:25,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 2809 transitions. [2021-06-05 05:11:25,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:11:25,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:25,132 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:25,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:25,333 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:25,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:25,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1892996741, now seen corresponding path program 77 times [2021-06-05 05:11:25,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:25,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773109227] [2021-06-05 05:11:25,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:25,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:25,586 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:25,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:25,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773109227] [2021-06-05 05:11:25,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773109227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:25,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738442860] [2021-06-05 05:11:25,586 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:25,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:11:25,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:25,609 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:25,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:25,728 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 25 treesize of output 15 [2021-06-05 05:11:25,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:25,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:25,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:25,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:11:25,758 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:25,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738442860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:25,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:25,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 19 [2021-06-05 05:11:25,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138672655] [2021-06-05 05:11:25,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:11:25,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:25,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:11:25,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:11:25,759 INFO L87 Difference]: Start difference. First operand 1170 states and 2809 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:27,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:27,194 INFO L93 Difference]: Finished difference Result 2604 states and 6401 transitions. [2021-06-05 05:11:27,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:11:27,194 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 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 30 [2021-06-05 05:11:27,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:27,197 INFO L225 Difference]: With dead ends: 2604 [2021-06-05 05:11:27,197 INFO L226 Difference]: Without dead ends: 2587 [2021-06-05 05:11:27,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1184.7ms TimeCoverageRelationStatistics Valid=337, Invalid=1555, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:11:27,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2021-06-05 05:11:27,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 1161. [2021-06-05 05:11:27,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 1160 states have (on average 2.4008620689655173) internal successors, (2785), 1160 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:27,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 2785 transitions. [2021-06-05 05:11:27,210 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 2785 transitions. Word has length 30 [2021-06-05 05:11:27,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:27,210 INFO L482 AbstractCegarLoop]: Abstraction has 1161 states and 2785 transitions. [2021-06-05 05:11:27,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:27,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 2785 transitions. [2021-06-05 05:11:27,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:11:27,211 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:27,211 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:27,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:27,412 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:27,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:27,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1779020825, now seen corresponding path program 78 times [2021-06-05 05:11:27,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:27,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207224220] [2021-06-05 05:11:27,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:27,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:27,661 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:27,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:27,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207224220] [2021-06-05 05:11:27,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207224220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:27,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801177469] [2021-06-05 05:11:27,661 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:27,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:11:27,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:27,686 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:27,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:27,831 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 25 treesize of output 15 [2021-06-05 05:11:27,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:27,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:27,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:27,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-06-05 05:11:27,856 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:27,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801177469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:27,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:27,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:11:27,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052407775] [2021-06-05 05:11:27,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:11:27,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:27,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:11:27,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:11:27,857 INFO L87 Difference]: Start difference. First operand 1161 states and 2785 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:30,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:30,545 INFO L93 Difference]: Finished difference Result 2475 states and 6013 transitions. [2021-06-05 05:11:30,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 05:11:30,545 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:11:30,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:30,548 INFO L225 Difference]: With dead ends: 2475 [2021-06-05 05:11:30,548 INFO L226 Difference]: Without dead ends: 2459 [2021-06-05 05:11:30,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 2142.0ms TimeCoverageRelationStatistics Valid=661, Invalid=3761, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 05:11:30,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2021-06-05 05:11:30,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 1158. [2021-06-05 05:11:30,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 2.4019014693172) internal successors, (2779), 1157 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:30,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 2779 transitions. [2021-06-05 05:11:30,560 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 2779 transitions. Word has length 30 [2021-06-05 05:11:30,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:30,560 INFO L482 AbstractCegarLoop]: Abstraction has 1158 states and 2779 transitions. [2021-06-05 05:11:30,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:30,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 2779 transitions. [2021-06-05 05:11:30,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:11:30,561 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:30,561 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:30,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:30,762 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:30,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:30,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1320989679, now seen corresponding path program 45 times [2021-06-05 05:11:30,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:30,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886484641] [2021-06-05 05:11:30,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:30,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:31,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:31,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886484641] [2021-06-05 05:11:31,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886484641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:31,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715589724] [2021-06-05 05:11:31,011 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:31,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:11:31,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:31,036 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 05:11:31,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:31,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:11:31,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:31,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 33 [2021-06-05 05:11:31,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:11:31,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:31,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:31,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:55 [2021-06-05 05:11:31,432 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:31,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715589724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:31,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:31,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-05 05:11:31,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702110198] [2021-06-05 05:11:31,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:11:31,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:31,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:11:31,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:11:31,433 INFO L87 Difference]: Start difference. First operand 1158 states and 2779 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:35,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:35,462 INFO L93 Difference]: Finished difference Result 2626 states and 6363 transitions. [2021-06-05 05:11:35,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 05:11:35,462 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:11:35,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:35,465 INFO L225 Difference]: With dead ends: 2626 [2021-06-05 05:11:35,465 INFO L226 Difference]: Without dead ends: 2611 [2021-06-05 05:11:35,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2208 ImplicationChecksByTransitivity, 3084.2ms TimeCoverageRelationStatistics Valid=839, Invalid=5967, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 05:11:35,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2611 states. [2021-06-05 05:11:35,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2611 to 1169. [2021-06-05 05:11:35,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1169 states, 1168 states have (on average 2.4006849315068495) internal successors, (2804), 1168 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:35,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 2804 transitions. [2021-06-05 05:11:35,478 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 2804 transitions. Word has length 30 [2021-06-05 05:11:35,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:35,478 INFO L482 AbstractCegarLoop]: Abstraction has 1169 states and 2804 transitions. [2021-06-05 05:11:35,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:35,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 2804 transitions. [2021-06-05 05:11:35,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:11:35,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:35,479 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:35,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:35,679 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:35,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:35,679 INFO L82 PathProgramCache]: Analyzing trace with hash 700502543, now seen corresponding path program 46 times [2021-06-05 05:11:35,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:35,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36692526] [2021-06-05 05:11:35,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:35,923 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:35,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:35,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36692526] [2021-06-05 05:11:35,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36692526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:35,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001104366] [2021-06-05 05:11:35,923 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:35,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:11:35,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:35,946 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:35,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:36,092 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 20 treesize of output 12 [2021-06-05 05:11:36,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:36,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:36,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:36,096 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:11:36,139 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:36,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001104366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:36,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:36,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:11:36,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104752055] [2021-06-05 05:11:36,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:11:36,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:36,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:11:36,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:11:36,139 INFO L87 Difference]: Start difference. First operand 1169 states and 2804 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:39,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:39,492 INFO L93 Difference]: Finished difference Result 3180 states and 7763 transitions. [2021-06-05 05:11:39,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 05:11:39,492 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:11:39,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:39,495 INFO L225 Difference]: With dead ends: 3180 [2021-06-05 05:11:39,495 INFO L226 Difference]: Without dead ends: 3165 [2021-06-05 05:11:39,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2443 ImplicationChecksByTransitivity, 2785.4ms TimeCoverageRelationStatistics Valid=1123, Invalid=5849, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 05:11:39,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3165 states. [2021-06-05 05:11:39,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3165 to 1186. [2021-06-05 05:11:39,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1186 states, 1185 states have (on average 2.40337552742616) internal successors, (2848), 1185 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:39,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 2848 transitions. [2021-06-05 05:11:39,509 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 2848 transitions. Word has length 30 [2021-06-05 05:11:39,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:39,510 INFO L482 AbstractCegarLoop]: Abstraction has 1186 states and 2848 transitions. [2021-06-05 05:11:39,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:39,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 2848 transitions. [2021-06-05 05:11:39,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:11:39,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:39,511 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:39,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-06-05 05:11:39,711 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:39,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:39,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1365705711, now seen corresponding path program 47 times [2021-06-05 05:11:39,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:39,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981658549] [2021-06-05 05:11:39,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:39,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:39,962 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:39,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:39,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981658549] [2021-06-05 05:11:39,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981658549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:39,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176157394] [2021-06-05 05:11:39,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:39,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:11:39,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:39,985 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:39,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:40,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:11:40,134 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 29 treesize of output 17 [2021-06-05 05:11:40,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:40,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:40,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:40,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-06-05 05:11:40,169 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:40,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176157394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:40,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:40,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 05:11:40,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579001512] [2021-06-05 05:11:40,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:11:40,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:40,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:11:40,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:11:40,170 INFO L87 Difference]: Start difference. First operand 1186 states and 2848 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:42,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:42,744 INFO L93 Difference]: Finished difference Result 2825 states and 6909 transitions. [2021-06-05 05:11:42,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 05:11:42,744 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:11:42,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:42,747 INFO L225 Difference]: With dead ends: 2825 [2021-06-05 05:11:42,747 INFO L226 Difference]: Without dead ends: 2805 [2021-06-05 05:11:42,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 1787.4ms TimeCoverageRelationStatistics Valid=603, Invalid=3179, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:11:42,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2021-06-05 05:11:42,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 1168. [2021-06-05 05:11:42,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 2.4010282776349614) internal successors, (2802), 1167 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:42,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 2802 transitions. [2021-06-05 05:11:42,761 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 2802 transitions. Word has length 30 [2021-06-05 05:11:42,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:42,761 INFO L482 AbstractCegarLoop]: Abstraction has 1168 states and 2802 transitions. [2021-06-05 05:11:42,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:42,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 2802 transitions. [2021-06-05 05:11:42,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:11:42,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:42,762 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:42,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-05 05:11:42,962 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:42,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:42,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1788035249, now seen corresponding path program 48 times [2021-06-05 05:11:42,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:42,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125719380] [2021-06-05 05:11:42,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:42,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:43,198 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:43,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:43,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125719380] [2021-06-05 05:11:43,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125719380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:43,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504872433] [2021-06-05 05:11:43,199 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:43,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:11:43,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:43,221 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:43,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:43,362 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 20 treesize of output 12 [2021-06-05 05:11:43,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:43,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:43,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:43,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:11:43,397 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:43,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504872433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:43,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:43,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 05:11:43,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382785259] [2021-06-05 05:11:43,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:11:43,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:43,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:11:43,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:11:43,398 INFO L87 Difference]: Start difference. First operand 1168 states and 2802 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:45,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:45,341 INFO L93 Difference]: Finished difference Result 2831 states and 6972 transitions. [2021-06-05 05:11:45,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:11:45,342 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 30 [2021-06-05 05:11:45,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:45,344 INFO L225 Difference]: With dead ends: 2831 [2021-06-05 05:11:45,344 INFO L226 Difference]: Without dead ends: 2818 [2021-06-05 05:11:45,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 1628.3ms TimeCoverageRelationStatistics Valid=498, Invalid=2808, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:11:45,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2818 states. [2021-06-05 05:11:45,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2818 to 1179. [2021-06-05 05:11:45,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 1178 states have (on average 2.402376910016978) internal successors, (2830), 1178 states have internal predecessors, (2830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:45,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 2830 transitions. [2021-06-05 05:11:45,357 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 2830 transitions. Word has length 30 [2021-06-05 05:11:45,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:45,358 INFO L482 AbstractCegarLoop]: Abstraction has 1179 states and 2830 transitions. [2021-06-05 05:11:45,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:45,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 2830 transitions. [2021-06-05 05:11:45,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:11:45,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:45,359 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:45,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:45,560 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:45,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:45,560 INFO L82 PathProgramCache]: Analyzing trace with hash -750530997, now seen corresponding path program 49 times [2021-06-05 05:11:45,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:45,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873254381] [2021-06-05 05:11:45,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:45,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:45,797 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:45,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:45,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873254381] [2021-06-05 05:11:45,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873254381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:45,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412030005] [2021-06-05 05:11:45,797 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:45,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:45,819 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:45,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:45,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:11:45,974 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 29 treesize of output 17 [2021-06-05 05:11:45,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:45,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:45,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:45,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-06-05 05:11:46,010 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:46,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412030005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:46,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:46,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 05:11:46,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566063622] [2021-06-05 05:11:46,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:11:46,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:46,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:11:46,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:11:46,011 INFO L87 Difference]: Start difference. First operand 1179 states and 2830 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:47,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:47,639 INFO L93 Difference]: Finished difference Result 2688 states and 6622 transitions. [2021-06-05 05:11:47,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:11:47,640 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 30 [2021-06-05 05:11:47,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:47,642 INFO L225 Difference]: With dead ends: 2688 [2021-06-05 05:11:47,642 INFO L226 Difference]: Without dead ends: 2671 [2021-06-05 05:11:47,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1233.5ms TimeCoverageRelationStatistics Valid=381, Invalid=2069, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:11:47,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2671 states. [2021-06-05 05:11:47,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2671 to 1171. [2021-06-05 05:11:47,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 2.4008547008547008) internal successors, (2809), 1170 states have internal predecessors, (2809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:47,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 2809 transitions. [2021-06-05 05:11:47,656 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 2809 transitions. Word has length 30 [2021-06-05 05:11:47,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:47,656 INFO L482 AbstractCegarLoop]: Abstraction has 1171 states and 2809 transitions. [2021-06-05 05:11:47,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:47,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 2809 transitions. [2021-06-05 05:11:47,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:11:47,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:47,657 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:47,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable491 [2021-06-05 05:11:47,857 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:47,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:47,857 INFO L82 PathProgramCache]: Analyzing trace with hash -215086789, now seen corresponding path program 50 times [2021-06-05 05:11:47,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:47,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683721761] [2021-06-05 05:11:47,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:47,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:48,072 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:48,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:48,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683721761] [2021-06-05 05:11:48,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683721761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:48,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745811153] [2021-06-05 05:11:48,073 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:48,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:48,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:48,094 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:48,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:48,280 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 20 treesize of output 12 [2021-06-05 05:11:48,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:48,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:48,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:48,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:11:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:48,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745811153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:48,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:48,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 05:11:48,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684306008] [2021-06-05 05:11:48,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:11:48,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:48,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:11:48,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:11:48,313 INFO L87 Difference]: Start difference. First operand 1171 states and 2809 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:50,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:50,068 INFO L93 Difference]: Finished difference Result 2685 states and 6598 transitions. [2021-06-05 05:11:50,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:11:50,068 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) 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 30 [2021-06-05 05:11:50,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:50,071 INFO L225 Difference]: With dead ends: 2685 [2021-06-05 05:11:50,071 INFO L226 Difference]: Without dead ends: 2675 [2021-06-05 05:11:50,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1129.0ms TimeCoverageRelationStatistics Valid=333, Invalid=2117, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:11:50,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2675 states. [2021-06-05 05:11:50,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2675 to 1170. [2021-06-05 05:11:50,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 2.4011976047904193) internal successors, (2807), 1169 states have internal predecessors, (2807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:50,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 2807 transitions. [2021-06-05 05:11:50,084 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 2807 transitions. Word has length 30 [2021-06-05 05:11:50,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:50,084 INFO L482 AbstractCegarLoop]: Abstraction has 1170 states and 2807 transitions. [2021-06-05 05:11:50,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:50,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 2807 transitions. [2021-06-05 05:11:50,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:11:50,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:50,085 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:50,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:50,285 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:50,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:50,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1247603719, now seen corresponding path program 51 times [2021-06-05 05:11:50,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:50,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531340578] [2021-06-05 05:11:50,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:50,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:50,506 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:50,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:50,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531340578] [2021-06-05 05:11:50,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531340578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:50,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714688103] [2021-06-05 05:11:50,506 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:50,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:11:50,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:50,529 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 05:11:50,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:50,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:11:50,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:11:50,777 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:50,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-06-05 05:11:50,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:11:50,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:50,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:50,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:30 [2021-06-05 05:11:50,880 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:50,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714688103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:50,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:50,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 26 [2021-06-05 05:11:50,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111206948] [2021-06-05 05:11:50,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:11:50,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:50,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:11:50,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:11:50,881 INFO L87 Difference]: Start difference. First operand 1170 states and 2807 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:53,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:53,162 INFO L93 Difference]: Finished difference Result 2565 states and 6313 transitions. [2021-06-05 05:11:53,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:11:53,163 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:11:53,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:53,165 INFO L225 Difference]: With dead ends: 2565 [2021-06-05 05:11:53,165 INFO L226 Difference]: Without dead ends: 2556 [2021-06-05 05:11:53,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1865.6ms TimeCoverageRelationStatistics Valid=479, Invalid=3061, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:11:53,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-06-05 05:11:53,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 1174. [2021-06-05 05:11:53,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 2.403239556692242) internal successors, (2819), 1173 states have internal predecessors, (2819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:53,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 2819 transitions. [2021-06-05 05:11:53,178 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 2819 transitions. Word has length 30 [2021-06-05 05:11:53,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:53,178 INFO L482 AbstractCegarLoop]: Abstraction has 1174 states and 2819 transitions. [2021-06-05 05:11:53,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:53,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 2819 transitions. [2021-06-05 05:11:53,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:11:53,179 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:53,179 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:53,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:53,379 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:53,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:53,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1290962527, now seen corresponding path program 52 times [2021-06-05 05:11:53,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:53,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916449368] [2021-06-05 05:11:53,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:53,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:53,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:53,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916449368] [2021-06-05 05:11:53,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916449368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:53,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691475376] [2021-06-05 05:11:53,581 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:53,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:11:53,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:53,603 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:53,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:53,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:11:53,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:53,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:53,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:53,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:11:53,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:53,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691475376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:53,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:53,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 05:11:53,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246520486] [2021-06-05 05:11:53,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:11:53,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:53,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:11:53,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:11:53,772 INFO L87 Difference]: Start difference. First operand 1174 states and 2819 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:55,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:55,558 INFO L93 Difference]: Finished difference Result 2735 states and 6750 transitions. [2021-06-05 05:11:55,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:11:55,558 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 30 [2021-06-05 05:11:55,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:55,560 INFO L225 Difference]: With dead ends: 2735 [2021-06-05 05:11:55,560 INFO L226 Difference]: Without dead ends: 2721 [2021-06-05 05:11:55,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 1513.2ms TimeCoverageRelationStatistics Valid=531, Invalid=2549, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:11:55,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2021-06-05 05:11:55,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 1214. [2021-06-05 05:11:55,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 2.410552349546579) internal successors, (2924), 1213 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:55,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 2924 transitions. [2021-06-05 05:11:55,574 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 2924 transitions. Word has length 30 [2021-06-05 05:11:55,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:55,574 INFO L482 AbstractCegarLoop]: Abstraction has 1214 states and 2924 transitions. [2021-06-05 05:11:55,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:55,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 2924 transitions. [2021-06-05 05:11:55,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:11:55,575 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:55,575 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:55,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-06-05 05:11:55,775 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:55,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:55,775 INFO L82 PathProgramCache]: Analyzing trace with hash -755518319, now seen corresponding path program 53 times [2021-06-05 05:11:55,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:55,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605501609] [2021-06-05 05:11:55,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:55,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:55,976 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:55,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:55,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605501609] [2021-06-05 05:11:55,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605501609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:55,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364406800] [2021-06-05 05:11:55,976 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:56,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:11:56,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:56,003 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:56,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:56,183 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 20 treesize of output 12 [2021-06-05 05:11:56,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:56,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:56,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:56,185 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:11:56,213 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:56,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364406800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:56,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:56,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 05:11:56,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255328743] [2021-06-05 05:11:56,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:11:56,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:56,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:11:56,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:11:56,214 INFO L87 Difference]: Start difference. First operand 1214 states and 2924 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:57,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:57,895 INFO L93 Difference]: Finished difference Result 2643 states and 6515 transitions. [2021-06-05 05:11:57,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:11:57,896 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) 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 30 [2021-06-05 05:11:57,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:57,898 INFO L225 Difference]: With dead ends: 2643 [2021-06-05 05:11:57,898 INFO L226 Difference]: Without dead ends: 2633 [2021-06-05 05:11:57,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1299.5ms TimeCoverageRelationStatistics Valid=369, Invalid=2081, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:11:57,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2633 states. [2021-06-05 05:11:57,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2633 to 1214. [2021-06-05 05:11:57,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 2.410552349546579) internal successors, (2924), 1213 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:57,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 2924 transitions. [2021-06-05 05:11:57,912 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 2924 transitions. Word has length 30 [2021-06-05 05:11:57,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:57,912 INFO L482 AbstractCegarLoop]: Abstraction has 1214 states and 2924 transitions. [2021-06-05 05:11:57,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:57,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 2924 transitions. [2021-06-05 05:11:57,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:11:57,913 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:57,913 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:58,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-06-05 05:11:58,113 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:58,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:58,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1556478755, now seen corresponding path program 54 times [2021-06-05 05:11:58,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:58,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695410261] [2021-06-05 05:11:58,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:58,338 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:58,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:58,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695410261] [2021-06-05 05:11:58,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695410261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:58,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679986357] [2021-06-05 05:11:58,339 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:58,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:11:58,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:58,362 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:11:58,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:58,528 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 20 treesize of output 12 [2021-06-05 05:11:58,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:58,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:11:58,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:11:58,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:11:58,566 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:58,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679986357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:58,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:58,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 05:11:58,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97335571] [2021-06-05 05:11:58,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:11:58,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:58,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:11:58,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:11:58,567 INFO L87 Difference]: Start difference. First operand 1214 states and 2924 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:01,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:01,046 INFO L93 Difference]: Finished difference Result 3129 states and 7758 transitions. [2021-06-05 05:12:01,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 05:12:01,046 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 30 [2021-06-05 05:12:01,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:01,048 INFO L225 Difference]: With dead ends: 3129 [2021-06-05 05:12:01,048 INFO L226 Difference]: Without dead ends: 3112 [2021-06-05 05:12:01,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 2059.5ms TimeCoverageRelationStatistics Valid=749, Invalid=3283, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:12:01,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3112 states. [2021-06-05 05:12:01,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3112 to 1200. [2021-06-05 05:12:01,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1199 states have (on average 2.403669724770642) internal successors, (2882), 1199 states have internal predecessors, (2882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:01,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 2882 transitions. [2021-06-05 05:12:01,063 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 2882 transitions. Word has length 30 [2021-06-05 05:12:01,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:01,063 INFO L482 AbstractCegarLoop]: Abstraction has 1200 states and 2882 transitions. [2021-06-05 05:12:01,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:01,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 2882 transitions. [2021-06-05 05:12:01,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:01,064 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:01,064 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:01,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-06-05 05:12:01,264 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:01,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:01,264 INFO L82 PathProgramCache]: Analyzing trace with hash -350772181, now seen corresponding path program 55 times [2021-06-05 05:12:01,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:01,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125485954] [2021-06-05 05:12:01,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:01,462 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:01,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:01,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125485954] [2021-06-05 05:12:01,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125485954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:01,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296571222] [2021-06-05 05:12:01,463 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:01,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:01,484 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:01,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:01,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:12:01,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:01,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:01,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:01,672 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 05:12:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:01,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296571222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:01,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:01,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 05:12:01,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336771622] [2021-06-05 05:12:01,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:12:01,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:01,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:12:01,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:12:01,701 INFO L87 Difference]: Start difference. First operand 1200 states and 2882 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:03,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:03,288 INFO L93 Difference]: Finished difference Result 2621 states and 6461 transitions. [2021-06-05 05:12:03,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:12:03,288 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) 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 30 [2021-06-05 05:12:03,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:03,290 INFO L225 Difference]: With dead ends: 2621 [2021-06-05 05:12:03,290 INFO L226 Difference]: Without dead ends: 2611 [2021-06-05 05:12:03,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 957.8ms TimeCoverageRelationStatistics Valid=276, Invalid=1704, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:12:03,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2611 states. [2021-06-05 05:12:03,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2611 to 1197. [2021-06-05 05:12:03,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1196 states have (on average 2.4038461538461537) internal successors, (2875), 1196 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:03,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 2875 transitions. [2021-06-05 05:12:03,304 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 2875 transitions. Word has length 30 [2021-06-05 05:12:03,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:03,304 INFO L482 AbstractCegarLoop]: Abstraction has 1197 states and 2875 transitions. [2021-06-05 05:12:03,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:03,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 2875 transitions. [2021-06-05 05:12:03,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:03,305 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:03,305 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:03,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-05 05:12:03,505 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:03,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:03,505 INFO L82 PathProgramCache]: Analyzing trace with hash 740706071, now seen corresponding path program 79 times [2021-06-05 05:12:03,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:03,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567658907] [2021-06-05 05:12:03,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:03,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:03,721 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:03,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:03,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567658907] [2021-06-05 05:12:03,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567658907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:03,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997491172] [2021-06-05 05:12:03,722 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:03,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:03,744 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:03,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:03,890 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 25 treesize of output 15 [2021-06-05 05:12:03,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:03,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:03,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:03,894 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-06-05 05:12:03,915 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:03,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997491172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:03,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:03,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:12:03,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794002575] [2021-06-05 05:12:03,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:12:03,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:03,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:12:03,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:12:03,915 INFO L87 Difference]: Start difference. First operand 1197 states and 2875 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:05,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:05,222 INFO L93 Difference]: Finished difference Result 2638 states and 6419 transitions. [2021-06-05 05:12:05,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:12:05,223 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:05,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:05,225 INFO L225 Difference]: With dead ends: 2638 [2021-06-05 05:12:05,225 INFO L226 Difference]: Without dead ends: 2613 [2021-06-05 05:12:05,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 992.4ms TimeCoverageRelationStatistics Valid=316, Invalid=1664, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:12:05,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2021-06-05 05:12:05,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 1215. [2021-06-05 05:12:05,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 2.404448105436573) internal successors, (2919), 1214 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:05,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 2919 transitions. [2021-06-05 05:12:05,238 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 2919 transitions. Word has length 30 [2021-06-05 05:12:05,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:05,238 INFO L482 AbstractCegarLoop]: Abstraction has 1215 states and 2919 transitions. [2021-06-05 05:12:05,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:05,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 2919 transitions. [2021-06-05 05:12:05,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:05,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:05,239 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:05,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable500 [2021-06-05 05:12:05,440 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:05,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:05,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1516477495, now seen corresponding path program 80 times [2021-06-05 05:12:05,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:05,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344507852] [2021-06-05 05:12:05,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:05,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:05,673 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:05,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:05,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344507852] [2021-06-05 05:12:05,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344507852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:05,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840378635] [2021-06-05 05:12:05,673 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:05,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:05,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:05,695 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:05,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:05,821 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 25 treesize of output 15 [2021-06-05 05:12:05,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:05,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:05,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:05,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:12:05,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:05,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840378635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:05,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:05,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:12:05,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048987968] [2021-06-05 05:12:05,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:12:05,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:05,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:12:05,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:12:05,862 INFO L87 Difference]: Start difference. First operand 1215 states and 2919 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:07,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:07,440 INFO L93 Difference]: Finished difference Result 3126 states and 7693 transitions. [2021-06-05 05:12:07,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:12:07,440 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:07,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:07,443 INFO L225 Difference]: With dead ends: 3126 [2021-06-05 05:12:07,443 INFO L226 Difference]: Without dead ends: 3113 [2021-06-05 05:12:07,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 1270.3ms TimeCoverageRelationStatistics Valid=457, Invalid=2093, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:12:07,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3113 states. [2021-06-05 05:12:07,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3113 to 1231. [2021-06-05 05:12:07,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1230 states have (on average 2.4073170731707316) internal successors, (2961), 1230 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:07,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 2961 transitions. [2021-06-05 05:12:07,458 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 2961 transitions. Word has length 30 [2021-06-05 05:12:07,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:07,459 INFO L482 AbstractCegarLoop]: Abstraction has 1231 states and 2961 transitions. [2021-06-05 05:12:07,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:07,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 2961 transitions. [2021-06-05 05:12:07,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:07,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:07,460 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:07,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-06-05 05:12:07,660 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:07,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:07,660 INFO L82 PathProgramCache]: Analyzing trace with hash -2113286633, now seen corresponding path program 81 times [2021-06-05 05:12:07,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:07,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696429210] [2021-06-05 05:12:07,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:07,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:07,882 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:07,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:07,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696429210] [2021-06-05 05:12:07,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696429210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:07,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941404655] [2021-06-05 05:12:07,882 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:07,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:12:07,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:07,905 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:12:07,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:08,034 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 25 treesize of output 15 [2021-06-05 05:12:08,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:08,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:08,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:08,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:14 [2021-06-05 05:12:08,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:08,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941404655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:08,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:08,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 20 [2021-06-05 05:12:08,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456750506] [2021-06-05 05:12:08,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:12:08,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:08,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:12:08,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:12:08,062 INFO L87 Difference]: Start difference. First operand 1231 states and 2961 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:09,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:09,375 INFO L93 Difference]: Finished difference Result 2831 states and 6978 transitions. [2021-06-05 05:12:09,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:12:09,375 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:09,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:09,378 INFO L225 Difference]: With dead ends: 2831 [2021-06-05 05:12:09,378 INFO L226 Difference]: Without dead ends: 2814 [2021-06-05 05:12:09,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1100.0ms TimeCoverageRelationStatistics Valid=333, Invalid=1473, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:12:09,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2814 states. [2021-06-05 05:12:09,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 1219. [2021-06-05 05:12:09,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 2.4039408866995076) internal successors, (2928), 1218 states have internal predecessors, (2928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:09,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 2928 transitions. [2021-06-05 05:12:09,392 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 2928 transitions. Word has length 30 [2021-06-05 05:12:09,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:09,392 INFO L482 AbstractCegarLoop]: Abstraction has 1219 states and 2928 transitions. [2021-06-05 05:12:09,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:09,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 2928 transitions. [2021-06-05 05:12:09,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:09,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:09,393 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:09,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-06-05 05:12:09,593 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:09,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:09,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1115033323, now seen corresponding path program 82 times [2021-06-05 05:12:09,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:09,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733727221] [2021-06-05 05:12:09,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:09,814 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:09,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:09,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733727221] [2021-06-05 05:12:09,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733727221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:09,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461039609] [2021-06-05 05:12:09,814 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:09,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:09,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:09,836 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:09,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:09,991 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 25 treesize of output 15 [2021-06-05 05:12:09,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:09,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:09,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:09,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-06-05 05:12:10,016 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:10,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461039609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:10,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:10,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:12:10,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484689018] [2021-06-05 05:12:10,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:12:10,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:10,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:12:10,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:12:10,017 INFO L87 Difference]: Start difference. First operand 1219 states and 2928 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:11,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:11,449 INFO L93 Difference]: Finished difference Result 2544 states and 6196 transitions. [2021-06-05 05:12:11,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:12:11,450 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:11,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:11,452 INFO L225 Difference]: With dead ends: 2544 [2021-06-05 05:12:11,452 INFO L226 Difference]: Without dead ends: 2525 [2021-06-05 05:12:11,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 950.4ms TimeCoverageRelationStatistics Valid=303, Invalid=1589, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:12:11,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2525 states. [2021-06-05 05:12:11,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2525 to 1204. [2021-06-05 05:12:11,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 1203 states have (on average 2.4064837905236907) internal successors, (2895), 1203 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:11,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 2895 transitions. [2021-06-05 05:12:11,465 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 2895 transitions. Word has length 30 [2021-06-05 05:12:11,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:11,465 INFO L482 AbstractCegarLoop]: Abstraction has 1204 states and 2895 transitions. [2021-06-05 05:12:11,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:11,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 2895 transitions. [2021-06-05 05:12:11,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:11,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:11,466 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:11,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-06-05 05:12:11,666 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:11,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:11,666 INFO L82 PathProgramCache]: Analyzing trace with hash -337896761, now seen corresponding path program 83 times [2021-06-05 05:12:11,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:11,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123144304] [2021-06-05 05:12:11,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:11,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:11,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:11,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:11,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123144304] [2021-06-05 05:12:11,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123144304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:11,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400607573] [2021-06-05 05:12:11,874 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:11,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:12:11,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:11,896 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:11,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:12,069 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 25 treesize of output 15 [2021-06-05 05:12:12,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:12,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:12,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:12,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:11 [2021-06-05 05:12:12,092 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:12,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400607573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:12,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:12,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-06-05 05:12:12,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574923477] [2021-06-05 05:12:12,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:12:12,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:12,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:12:12,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:12:12,092 INFO L87 Difference]: Start difference. First operand 1204 states and 2895 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:12,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:12,836 INFO L93 Difference]: Finished difference Result 2465 states and 6020 transitions. [2021-06-05 05:12:12,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:12:12,836 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:12,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:12,838 INFO L225 Difference]: With dead ends: 2465 [2021-06-05 05:12:12,838 INFO L226 Difference]: Without dead ends: 2456 [2021-06-05 05:12:12,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 655.9ms TimeCoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:12:12,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2021-06-05 05:12:12,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 1206. [2021-06-05 05:12:12,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 2.404979253112033) internal successors, (2898), 1205 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:12,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 2898 transitions. [2021-06-05 05:12:12,851 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 2898 transitions. Word has length 30 [2021-06-05 05:12:12,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:12,851 INFO L482 AbstractCegarLoop]: Abstraction has 1206 states and 2898 transitions. [2021-06-05 05:12:12,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:12,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 2898 transitions. [2021-06-05 05:12:12,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:12,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:12,852 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:13,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable504 [2021-06-05 05:12:13,052 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:13,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:13,053 INFO L82 PathProgramCache]: Analyzing trace with hash 711613029, now seen corresponding path program 56 times [2021-06-05 05:12:13,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:13,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002146738] [2021-06-05 05:12:13,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:13,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:13,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002146738] [2021-06-05 05:12:13,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002146738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:13,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109446881] [2021-06-05 05:12:13,280 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:13,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:13,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:13,302 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:13,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:13,462 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 20 treesize of output 12 [2021-06-05 05:12:13,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:13,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:13,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:13,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:12:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:13,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109446881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:13,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:13,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:12:13,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119803355] [2021-06-05 05:12:13,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:12:13,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:13,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:12:13,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:12:13,505 INFO L87 Difference]: Start difference. First operand 1206 states and 2898 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:15,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:15,320 INFO L93 Difference]: Finished difference Result 3034 states and 7478 transitions. [2021-06-05 05:12:15,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:12:15,321 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:15,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:15,323 INFO L225 Difference]: With dead ends: 3034 [2021-06-05 05:12:15,323 INFO L226 Difference]: Without dead ends: 3019 [2021-06-05 05:12:15,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 1508.0ms TimeCoverageRelationStatistics Valid=596, Invalid=2944, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:12:15,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2021-06-05 05:12:15,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 1224. [2021-06-05 05:12:15,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1223 states have (on average 2.4080130825838104) internal successors, (2945), 1223 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:15,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 2945 transitions. [2021-06-05 05:12:15,337 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 2945 transitions. Word has length 30 [2021-06-05 05:12:15,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:15,337 INFO L482 AbstractCegarLoop]: Abstraction has 1224 states and 2945 transitions. [2021-06-05 05:12:15,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:15,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 2945 transitions. [2021-06-05 05:12:15,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:15,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:15,338 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:15,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:15,538 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:15,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:15,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1376816197, now seen corresponding path program 57 times [2021-06-05 05:12:15,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:15,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866535740] [2021-06-05 05:12:15,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:15,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:15,761 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:15,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:15,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866535740] [2021-06-05 05:12:15,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866535740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:15,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904237012] [2021-06-05 05:12:15,762 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:15,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:12:15,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:15,787 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 05:12:15,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:16,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:16,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:16,035 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:16,035 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 27 treesize of output 25 [2021-06-05 05:12:16,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:12:16,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:16,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:16,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:30 [2021-06-05 05:12:16,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:16,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904237012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:16,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:16,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 27 [2021-06-05 05:12:16,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730487802] [2021-06-05 05:12:16,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:12:16,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:16,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:12:16,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:12:16,131 INFO L87 Difference]: Start difference. First operand 1224 states and 2945 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:17,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:17,874 INFO L93 Difference]: Finished difference Result 2616 states and 6442 transitions. [2021-06-05 05:12:17,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:12:17,875 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:17,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:17,877 INFO L225 Difference]: With dead ends: 2616 [2021-06-05 05:12:17,877 INFO L226 Difference]: Without dead ends: 2598 [2021-06-05 05:12:17,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1304.0ms TimeCoverageRelationStatistics Valid=404, Invalid=2566, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:12:17,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2021-06-05 05:12:17,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 1209. [2021-06-05 05:12:17,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1208 states have (on average 2.4048013245033113) internal successors, (2905), 1208 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:17,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 2905 transitions. [2021-06-05 05:12:17,890 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 2905 transitions. Word has length 30 [2021-06-05 05:12:17,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:17,890 INFO L482 AbstractCegarLoop]: Abstraction has 1209 states and 2905 transitions. [2021-06-05 05:12:17,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:17,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 2905 transitions. [2021-06-05 05:12:17,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:17,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:17,891 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:18,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable506 [2021-06-05 05:12:18,092 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:18,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:18,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1799145735, now seen corresponding path program 58 times [2021-06-05 05:12:18,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:18,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904692496] [2021-06-05 05:12:18,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:18,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:18,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:18,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:18,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904692496] [2021-06-05 05:12:18,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904692496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:18,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743498565] [2021-06-05 05:12:18,289 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:18,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:18,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:18,311 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:18,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:18,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:12:18,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:18,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:18,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:18,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:12:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:18,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743498565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:18,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:18,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 05:12:18,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264390176] [2021-06-05 05:12:18,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:12:18,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:18,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:12:18,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:12:18,505 INFO L87 Difference]: Start difference. First operand 1209 states and 2905 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:19,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:19,673 INFO L93 Difference]: Finished difference Result 2695 states and 6685 transitions. [2021-06-05 05:12:19,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:12:19,673 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 30 [2021-06-05 05:12:19,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:19,676 INFO L225 Difference]: With dead ends: 2695 [2021-06-05 05:12:19,676 INFO L226 Difference]: Without dead ends: 2682 [2021-06-05 05:12:19,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 937.6ms TimeCoverageRelationStatistics Valid=304, Invalid=1676, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:12:19,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2021-06-05 05:12:19,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 1221. [2021-06-05 05:12:19,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 2.4057377049180326) internal successors, (2935), 1220 states have internal predecessors, (2935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:19,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 2935 transitions. [2021-06-05 05:12:19,694 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 2935 transitions. Word has length 30 [2021-06-05 05:12:19,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:19,694 INFO L482 AbstractCegarLoop]: Abstraction has 1221 states and 2935 transitions. [2021-06-05 05:12:19,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:19,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 2935 transitions. [2021-06-05 05:12:19,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:19,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:19,695 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:19,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:19,897 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:19,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:19,897 INFO L82 PathProgramCache]: Analyzing trace with hash -739420511, now seen corresponding path program 59 times [2021-06-05 05:12:19,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:19,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889269020] [2021-06-05 05:12:19,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:19,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:20,109 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:20,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:20,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889269020] [2021-06-05 05:12:20,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889269020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:20,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158339775] [2021-06-05 05:12:20,110 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:20,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:12:20,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:20,132 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:20,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:20,282 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 20 treesize of output 12 [2021-06-05 05:12:20,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:20,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:20,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:20,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:12:20,314 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:20,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158339775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:20,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:20,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 05:12:20,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496672676] [2021-06-05 05:12:20,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:12:20,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:20,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:12:20,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:12:20,315 INFO L87 Difference]: Start difference. First operand 1221 states and 2935 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:21,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:21,400 INFO L93 Difference]: Finished difference Result 2617 states and 6463 transitions. [2021-06-05 05:12:21,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:12:21,401 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 30 [2021-06-05 05:12:21,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:21,403 INFO L225 Difference]: With dead ends: 2617 [2021-06-05 05:12:21,403 INFO L226 Difference]: Without dead ends: 2600 [2021-06-05 05:12:21,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 876.5ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:12:21,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2021-06-05 05:12:21,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 1212. [2021-06-05 05:12:21,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 1211 states have (on average 2.4046242774566475) internal successors, (2912), 1211 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:21,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 2912 transitions. [2021-06-05 05:12:21,416 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 2912 transitions. Word has length 30 [2021-06-05 05:12:21,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:21,417 INFO L482 AbstractCegarLoop]: Abstraction has 1212 states and 2912 transitions. [2021-06-05 05:12:21,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:21,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 2912 transitions. [2021-06-05 05:12:21,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:21,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:21,418 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:21,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-06-05 05:12:21,618 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:21,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:21,618 INFO L82 PathProgramCache]: Analyzing trace with hash -203976303, now seen corresponding path program 60 times [2021-06-05 05:12:21,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:21,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006975527] [2021-06-05 05:12:21,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:21,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:21,816 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:21,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:21,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006975527] [2021-06-05 05:12:21,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006975527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:21,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963737928] [2021-06-05 05:12:21,816 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:21,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:12:21,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:21,839 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:12:21,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:22,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:22,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:12:22,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:12:22,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:22,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:22,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:22,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 05:12:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:22,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963737928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:22,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:22,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 05:12:22,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185835938] [2021-06-05 05:12:22,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:12:22,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:22,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:12:22,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:12:22,206 INFO L87 Difference]: Start difference. First operand 1212 states and 2912 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:23,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:23,543 INFO L93 Difference]: Finished difference Result 2523 states and 6213 transitions. [2021-06-05 05:12:23,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:12:23,543 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 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 30 [2021-06-05 05:12:23,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:23,545 INFO L225 Difference]: With dead ends: 2523 [2021-06-05 05:12:23,545 INFO L226 Difference]: Without dead ends: 2513 [2021-06-05 05:12:23,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 861.7ms TimeCoverageRelationStatistics Valid=242, Invalid=1564, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:12:23,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2021-06-05 05:12:23,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 1207. [2021-06-05 05:12:23,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1206 states have (on average 2.4046434494195688) internal successors, (2900), 1206 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:23,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 2900 transitions. [2021-06-05 05:12:23,558 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 2900 transitions. Word has length 30 [2021-06-05 05:12:23,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:23,558 INFO L482 AbstractCegarLoop]: Abstraction has 1207 states and 2900 transitions. [2021-06-05 05:12:23,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:23,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 2900 transitions. [2021-06-05 05:12:23,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:23,559 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:23,559 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:23,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable511,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:23,760 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:23,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:23,760 INFO L82 PathProgramCache]: Analyzing trace with hash 2005225401, now seen corresponding path program 61 times [2021-06-05 05:12:23,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:23,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111657274] [2021-06-05 05:12:23,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:23,980 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:23,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:23,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111657274] [2021-06-05 05:12:23,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111657274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:23,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786684107] [2021-06-05 05:12:23,980 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:24,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:24,002 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:24,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:24,173 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 19 treesize of output 11 [2021-06-05 05:12:24,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:24,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:24,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:24,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 05:12:24,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:24,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786684107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:24,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:24,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:12:24,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378686517] [2021-06-05 05:12:24,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:12:24,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:24,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:12:24,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:12:24,201 INFO L87 Difference]: Start difference. First operand 1207 states and 2900 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:25,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:25,786 INFO L93 Difference]: Finished difference Result 2467 states and 6031 transitions. [2021-06-05 05:12:25,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:12:25,787 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:25,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:25,789 INFO L225 Difference]: With dead ends: 2467 [2021-06-05 05:12:25,789 INFO L226 Difference]: Without dead ends: 2449 [2021-06-05 05:12:25,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1039.5ms TimeCoverageRelationStatistics Valid=340, Invalid=1822, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:12:25,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2449 states. [2021-06-05 05:12:25,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2449 to 1197. [2021-06-05 05:12:25,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1196 states have (on average 2.4038461538461537) internal successors, (2875), 1196 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:25,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 2875 transitions. [2021-06-05 05:12:25,801 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 2875 transitions. Word has length 30 [2021-06-05 05:12:25,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:25,802 INFO L482 AbstractCegarLoop]: Abstraction has 1197 states and 2875 transitions. [2021-06-05 05:12:25,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:25,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 2875 transitions. [2021-06-05 05:12:25,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:25,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:25,803 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:26,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-06-05 05:12:26,003 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:26,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:26,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1032671535, now seen corresponding path program 62 times [2021-06-05 05:12:26,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:26,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538559386] [2021-06-05 05:12:26,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:26,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:26,207 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:26,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:26,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538559386] [2021-06-05 05:12:26,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538559386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:26,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160015173] [2021-06-05 05:12:26,207 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:26,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:26,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:26,229 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:26,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:26,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:26,406 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 27 treesize of output 15 [2021-06-05 05:12:26,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:26,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:26,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:26,410 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-06-05 05:12:26,441 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:26,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160015173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:26,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:26,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:12:26,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354739182] [2021-06-05 05:12:26,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:12:26,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:26,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:12:26,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:12:26,442 INFO L87 Difference]: Start difference. First operand 1197 states and 2875 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:27,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:27,899 INFO L93 Difference]: Finished difference Result 2588 states and 6315 transitions. [2021-06-05 05:12:27,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:12:27,900 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:27,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:27,902 INFO L225 Difference]: With dead ends: 2588 [2021-06-05 05:12:27,902 INFO L226 Difference]: Without dead ends: 2571 [2021-06-05 05:12:27,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1001.2ms TimeCoverageRelationStatistics Valid=316, Invalid=1664, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:12:27,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-06-05 05:12:27,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 1215. [2021-06-05 05:12:27,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 2.4069192751235584) internal successors, (2922), 1214 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:27,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 2922 transitions. [2021-06-05 05:12:27,915 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 2922 transitions. Word has length 30 [2021-06-05 05:12:27,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:27,915 INFO L482 AbstractCegarLoop]: Abstraction has 1215 states and 2922 transitions. [2021-06-05 05:12:27,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:27,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 2922 transitions. [2021-06-05 05:12:27,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:27,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:27,916 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:28,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-06-05 05:12:28,117 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:28,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:28,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1306343273, now seen corresponding path program 63 times [2021-06-05 05:12:28,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:28,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286298440] [2021-06-05 05:12:28,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:28,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:28,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:28,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286298440] [2021-06-05 05:12:28,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286298440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:28,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538537895] [2021-06-05 05:12:28,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:28,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:12:28,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:28,342 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:28,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:28,475 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 20 treesize of output 12 [2021-06-05 05:12:28,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:28,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:28,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:28,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:12:28,518 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:28,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538537895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:28,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:28,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:12:28,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546225335] [2021-06-05 05:12:28,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:12:28,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:28,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:12:28,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:12:28,519 INFO L87 Difference]: Start difference. First operand 1215 states and 2922 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:29,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:29,840 INFO L93 Difference]: Finished difference Result 3020 states and 7433 transitions. [2021-06-05 05:12:29,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:12:29,841 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:29,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:29,843 INFO L225 Difference]: With dead ends: 3020 [2021-06-05 05:12:29,843 INFO L226 Difference]: Without dead ends: 3007 [2021-06-05 05:12:29,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 1172.1ms TimeCoverageRelationStatistics Valid=490, Invalid=2266, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:12:29,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3007 states. [2021-06-05 05:12:29,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3007 to 1226. [2021-06-05 05:12:29,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1225 states have (on average 2.409795918367347) internal successors, (2952), 1225 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:29,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 2952 transitions. [2021-06-05 05:12:29,857 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 2952 transitions. Word has length 30 [2021-06-05 05:12:29,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:29,857 INFO L482 AbstractCegarLoop]: Abstraction has 1226 states and 2952 transitions. [2021-06-05 05:12:29,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:29,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 2952 transitions. [2021-06-05 05:12:29,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:29,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:29,858 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:30,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable514,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:30,059 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:30,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:30,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1971546441, now seen corresponding path program 64 times [2021-06-05 05:12:30,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:30,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786373640] [2021-06-05 05:12:30,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:30,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:30,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:30,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786373640] [2021-06-05 05:12:30,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786373640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:30,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195500832] [2021-06-05 05:12:30,259 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:30,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:30,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:30,280 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:30,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:30,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:30,445 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 29 treesize of output 17 [2021-06-05 05:12:30,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:30,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:30,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:30,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-06-05 05:12:30,478 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:30,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195500832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:30,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:30,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 05:12:30,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860771595] [2021-06-05 05:12:30,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:12:30,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:30,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:12:30,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:12:30,479 INFO L87 Difference]: Start difference. First operand 1226 states and 2952 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:31,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:31,861 INFO L93 Difference]: Finished difference Result 2743 states and 6755 transitions. [2021-06-05 05:12:31,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:12:31,861 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:31,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:31,863 INFO L225 Difference]: With dead ends: 2743 [2021-06-05 05:12:31,863 INFO L226 Difference]: Without dead ends: 2725 [2021-06-05 05:12:31,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1005.3ms TimeCoverageRelationStatistics Valid=330, Invalid=1650, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:12:31,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2021-06-05 05:12:31,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 1200. [2021-06-05 05:12:31,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1199 states have (on average 2.403669724770642) internal successors, (2882), 1199 states have internal predecessors, (2882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:31,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 2882 transitions. [2021-06-05 05:12:31,877 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 2882 transitions. Word has length 30 [2021-06-05 05:12:31,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:31,877 INFO L482 AbstractCegarLoop]: Abstraction has 1200 states and 2882 transitions. [2021-06-05 05:12:31,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:31,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 2882 transitions. [2021-06-05 05:12:31,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:31,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:31,878 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:32,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:32,081 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:32,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:32,081 INFO L82 PathProgramCache]: Analyzing trace with hash 720783231, now seen corresponding path program 65 times [2021-06-05 05:12:32,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:32,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710331543] [2021-06-05 05:12:32,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:32,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:32,272 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:32,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:32,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710331543] [2021-06-05 05:12:32,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710331543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:32,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114712168] [2021-06-05 05:12:32,273 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:32,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:12:32,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:32,295 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:32,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:32,455 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 19 treesize of output 11 [2021-06-05 05:12:32,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:32,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:32,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:32,458 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 05:12:32,484 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:32,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114712168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:32,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:32,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:12:32,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825260365] [2021-06-05 05:12:32,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:12:32,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:32,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:12:32,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:12:32,485 INFO L87 Difference]: Start difference. First operand 1200 states and 2882 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:33,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:33,423 INFO L93 Difference]: Finished difference Result 2411 states and 5894 transitions. [2021-06-05 05:12:33,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:12:33,423 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:33,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:33,425 INFO L225 Difference]: With dead ends: 2411 [2021-06-05 05:12:33,425 INFO L226 Difference]: Without dead ends: 2402 [2021-06-05 05:12:33,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 690.7ms TimeCoverageRelationStatistics Valid=225, Invalid=1257, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:12:33,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2021-06-05 05:12:33,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 1197. [2021-06-05 05:12:33,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1196 states have (on average 2.4038461538461537) internal successors, (2875), 1196 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:33,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 2875 transitions. [2021-06-05 05:12:33,439 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 2875 transitions. Word has length 30 [2021-06-05 05:12:33,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:33,439 INFO L482 AbstractCegarLoop]: Abstraction has 1197 states and 2875 transitions. [2021-06-05 05:12:33,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:33,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 2875 transitions. [2021-06-05 05:12:33,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:33,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:33,440 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:33,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable516 [2021-06-05 05:12:33,640 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:33,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:33,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1419800111, now seen corresponding path program 84 times [2021-06-05 05:12:33,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:33,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290468363] [2021-06-05 05:12:33,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:33,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:33,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:33,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:33,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290468363] [2021-06-05 05:12:33,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290468363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:33,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348386658] [2021-06-05 05:12:33,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:33,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:12:33,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:33,875 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:12:33,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:34,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:12:34,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:34,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:34,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:34,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:12:34,098 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:34,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348386658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:34,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:34,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:12:34,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197449797] [2021-06-05 05:12:34,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:12:34,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:34,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:12:34,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:12:34,099 INFO L87 Difference]: Start difference. First operand 1197 states and 2875 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:35,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:35,155 INFO L93 Difference]: Finished difference Result 2660 states and 6507 transitions. [2021-06-05 05:12:35,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:12:35,155 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:35,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:35,157 INFO L225 Difference]: With dead ends: 2660 [2021-06-05 05:12:35,157 INFO L226 Difference]: Without dead ends: 2651 [2021-06-05 05:12:35,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 667.5ms TimeCoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:12:35,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2021-06-05 05:12:35,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 1197. [2021-06-05 05:12:35,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1196 states have (on average 2.4038461538461537) internal successors, (2875), 1196 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:35,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 2875 transitions. [2021-06-05 05:12:35,170 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 2875 transitions. Word has length 30 [2021-06-05 05:12:35,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:35,171 INFO L482 AbstractCegarLoop]: Abstraction has 1197 states and 2875 transitions. [2021-06-05 05:12:35,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:35,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 2875 transitions. [2021-06-05 05:12:35,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:35,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:35,172 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:35,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:35,372 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:35,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:35,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1811421553, now seen corresponding path program 85 times [2021-06-05 05:12:35,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:35,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772038977] [2021-06-05 05:12:35,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:35,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:35,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:35,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772038977] [2021-06-05 05:12:35,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772038977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:35,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523504067] [2021-06-05 05:12:35,565 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:35,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:35,587 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:35,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:35,765 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 20 treesize of output 12 [2021-06-05 05:12:35,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:35,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:35,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:35,767 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:12:35,794 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:35,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523504067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:35,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:35,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:12:35,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147161817] [2021-06-05 05:12:35,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:12:35,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:35,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:12:35,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:12:35,795 INFO L87 Difference]: Start difference. First operand 1197 states and 2875 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:37,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:37,064 INFO L93 Difference]: Finished difference Result 2800 states and 6826 transitions. [2021-06-05 05:12:37,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:12:37,064 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:37,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:37,067 INFO L225 Difference]: With dead ends: 2800 [2021-06-05 05:12:37,067 INFO L226 Difference]: Without dead ends: 2775 [2021-06-05 05:12:37,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 780.7ms TimeCoverageRelationStatistics Valid=277, Invalid=1129, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:12:37,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2021-06-05 05:12:37,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 1215. [2021-06-05 05:12:37,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 2.404448105436573) internal successors, (2919), 1214 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:37,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 2919 transitions. [2021-06-05 05:12:37,081 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 2919 transitions. Word has length 30 [2021-06-05 05:12:37,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:37,081 INFO L482 AbstractCegarLoop]: Abstraction has 1215 states and 2919 transitions. [2021-06-05 05:12:37,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:37,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 2919 transitions. [2021-06-05 05:12:37,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:37,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:37,082 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:37,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable518 [2021-06-05 05:12:37,282 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:37,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:37,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1934528523, now seen corresponding path program 86 times [2021-06-05 05:12:37,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:37,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334457149] [2021-06-05 05:12:37,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:37,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:37,484 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:37,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:37,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334457149] [2021-06-05 05:12:37,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334457149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:37,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122186116] [2021-06-05 05:12:37,485 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:37,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:37,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:37,507 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:37,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:37,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:37,667 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 29 treesize of output 17 [2021-06-05 05:12:37,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:37,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:37,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:37,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-06-05 05:12:37,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:37,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122186116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:37,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:37,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:12:37,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462819820] [2021-06-05 05:12:37,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:12:37,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:37,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:12:37,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:12:37,716 INFO L87 Difference]: Start difference. First operand 1215 states and 2919 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:39,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:39,333 INFO L93 Difference]: Finished difference Result 3292 states and 8108 transitions. [2021-06-05 05:12:39,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:12:39,333 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:39,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:39,336 INFO L225 Difference]: With dead ends: 3292 [2021-06-05 05:12:39,336 INFO L226 Difference]: Without dead ends: 3279 [2021-06-05 05:12:39,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1098.2ms TimeCoverageRelationStatistics Valid=433, Invalid=1919, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:12:39,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2021-06-05 05:12:39,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 1231. [2021-06-05 05:12:39,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1230 states have (on average 2.4073170731707316) internal successors, (2961), 1230 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:39,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 2961 transitions. [2021-06-05 05:12:39,350 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 2961 transitions. Word has length 30 [2021-06-05 05:12:39,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:39,350 INFO L482 AbstractCegarLoop]: Abstraction has 1231 states and 2961 transitions. [2021-06-05 05:12:39,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:39,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 2961 transitions. [2021-06-05 05:12:39,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:39,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:39,352 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:39,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:39,552 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:39,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:39,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1695235605, now seen corresponding path program 87 times [2021-06-05 05:12:39,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:39,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617710951] [2021-06-05 05:12:39,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:39,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:39,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:39,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:39,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617710951] [2021-06-05 05:12:39,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617710951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:39,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132781152] [2021-06-05 05:12:39,750 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:39,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:12:39,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:39,773 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:39,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:39,934 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 20 treesize of output 12 [2021-06-05 05:12:39,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:39,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:39,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:39,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:12:39,968 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:39,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132781152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:39,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:39,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 05:12:39,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267668717] [2021-06-05 05:12:39,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:12:39,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:39,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:12:39,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:12:39,968 INFO L87 Difference]: Start difference. First operand 1231 states and 2961 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:41,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:41,114 INFO L93 Difference]: Finished difference Result 2827 states and 6950 transitions. [2021-06-05 05:12:41,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:12:41,114 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:41,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:41,117 INFO L225 Difference]: With dead ends: 2827 [2021-06-05 05:12:41,117 INFO L226 Difference]: Without dead ends: 2810 [2021-06-05 05:12:41,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 816.6ms TimeCoverageRelationStatistics Valid=256, Invalid=1304, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:12:41,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2810 states. [2021-06-05 05:12:41,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2810 to 1219. [2021-06-05 05:12:41,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 2.4039408866995076) internal successors, (2928), 1218 states have internal predecessors, (2928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:41,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 2928 transitions. [2021-06-05 05:12:41,131 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 2928 transitions. Word has length 30 [2021-06-05 05:12:41,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:41,131 INFO L482 AbstractCegarLoop]: Abstraction has 1219 states and 2928 transitions. [2021-06-05 05:12:41,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:41,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 2928 transitions. [2021-06-05 05:12:41,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:41,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:41,132 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:41,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-06-05 05:12:41,332 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:41,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:41,332 INFO L82 PathProgramCache]: Analyzing trace with hash -696982295, now seen corresponding path program 88 times [2021-06-05 05:12:41,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:41,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907492251] [2021-06-05 05:12:41,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:41,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:41,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:41,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907492251] [2021-06-05 05:12:41,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907492251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:41,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048715328] [2021-06-05 05:12:41,525 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:41,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:41,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:41,547 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:41,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:41,725 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 20 treesize of output 12 [2021-06-05 05:12:41,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:41,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:41,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:41,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:12:41,755 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:41,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048715328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:41,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:41,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:12:41,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245874838] [2021-06-05 05:12:41,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:12:41,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:41,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:12:41,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:12:41,755 INFO L87 Difference]: Start difference. First operand 1219 states and 2928 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:42,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:42,875 INFO L93 Difference]: Finished difference Result 2720 states and 6635 transitions. [2021-06-05 05:12:42,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:12:42,876 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:42,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:42,878 INFO L225 Difference]: With dead ends: 2720 [2021-06-05 05:12:42,878 INFO L226 Difference]: Without dead ends: 2701 [2021-06-05 05:12:42,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 748.9ms TimeCoverageRelationStatistics Valid=291, Invalid=1191, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:12:42,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2021-06-05 05:12:42,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 1200. [2021-06-05 05:12:42,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1199 states have (on average 2.403669724770642) internal successors, (2882), 1199 states have internal predecessors, (2882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:42,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 2882 transitions. [2021-06-05 05:12:42,898 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 2882 transitions. Word has length 30 [2021-06-05 05:12:42,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:42,898 INFO L482 AbstractCegarLoop]: Abstraction has 1200 states and 2882 transitions. [2021-06-05 05:12:42,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:42,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 2882 transitions. [2021-06-05 05:12:42,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:42,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:42,899 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:43,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-06-05 05:12:43,100 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:43,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:43,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1677306459, now seen corresponding path program 89 times [2021-06-05 05:12:43,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:43,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572484151] [2021-06-05 05:12:43,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:43,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:43,295 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:43,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:43,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572484151] [2021-06-05 05:12:43,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572484151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:43,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453329046] [2021-06-05 05:12:43,296 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:43,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:12:43,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:43,318 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:43,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:43,497 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 20 treesize of output 12 [2021-06-05 05:12:43,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:43,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:43,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:43,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:12:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:43,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453329046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:43,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:43,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:12:43,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278747548] [2021-06-05 05:12:43,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:12:43,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:43,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:12:43,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:12:43,528 INFO L87 Difference]: Start difference. First operand 1200 states and 2882 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:44,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:44,535 INFO L93 Difference]: Finished difference Result 2628 states and 6430 transitions. [2021-06-05 05:12:44,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:12:44,535 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:44,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:44,538 INFO L225 Difference]: With dead ends: 2628 [2021-06-05 05:12:44,538 INFO L226 Difference]: Without dead ends: 2619 [2021-06-05 05:12:44,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 633.8ms TimeCoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:12:44,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2619 states. [2021-06-05 05:12:44,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2619 to 1197. [2021-06-05 05:12:44,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1196 states have (on average 2.4038461538461537) internal successors, (2875), 1196 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:44,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 2875 transitions. [2021-06-05 05:12:44,551 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 2875 transitions. Word has length 30 [2021-06-05 05:12:44,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:44,551 INFO L482 AbstractCegarLoop]: Abstraction has 1197 states and 2875 transitions. [2021-06-05 05:12:44,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:44,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 2875 transitions. [2021-06-05 05:12:44,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:44,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:44,552 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:44,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable522 [2021-06-05 05:12:44,757 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:44,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:44,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1600223437, now seen corresponding path program 90 times [2021-06-05 05:12:44,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:44,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072601000] [2021-06-05 05:12:44,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:44,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:44,975 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:44,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:44,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072601000] [2021-06-05 05:12:44,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072601000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:44,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450533460] [2021-06-05 05:12:44,975 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:44,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:12:44,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:44,998 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:12:44,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:45,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:45,295 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:45,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:12:45,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:45,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:45,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:45,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:38 [2021-06-05 05:12:45,435 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:45,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450533460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:45,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:45,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-06-05 05:12:45,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694046953] [2021-06-05 05:12:45,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:12:45,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:45,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:12:45,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:12:45,436 INFO L87 Difference]: Start difference. First operand 1197 states and 2875 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:47,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:47,910 INFO L93 Difference]: Finished difference Result 2855 states and 6979 transitions. [2021-06-05 05:12:47,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:12:47,910 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:47,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:47,913 INFO L225 Difference]: With dead ends: 2855 [2021-06-05 05:12:47,913 INFO L226 Difference]: Without dead ends: 2834 [2021-06-05 05:12:47,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 1995.2ms TimeCoverageRelationStatistics Valid=529, Invalid=2333, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:12:47,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2021-06-05 05:12:47,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 1214. [2021-06-05 05:12:47,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 2.4047815333882934) internal successors, (2917), 1213 states have internal predecessors, (2917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:47,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 2917 transitions. [2021-06-05 05:12:47,927 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 2917 transitions. Word has length 30 [2021-06-05 05:12:47,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:47,927 INFO L482 AbstractCegarLoop]: Abstraction has 1214 states and 2917 transitions. [2021-06-05 05:12:47,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:47,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 2917 transitions. [2021-06-05 05:12:47,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:47,928 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:47,928 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:48,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable523 [2021-06-05 05:12:48,128 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:48,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:48,129 INFO L82 PathProgramCache]: Analyzing trace with hash -824452013, now seen corresponding path program 91 times [2021-06-05 05:12:48,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:48,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913770335] [2021-06-05 05:12:48,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:48,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:48,351 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:48,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:48,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913770335] [2021-06-05 05:12:48,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913770335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:48,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031098781] [2021-06-05 05:12:48,352 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:48,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:48,374 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:48,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:48,536 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 20 treesize of output 12 [2021-06-05 05:12:48,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:48,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:48,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:48,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:12:48,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:48,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031098781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:48,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:48,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:12:48,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980205882] [2021-06-05 05:12:48,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:12:48,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:48,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:12:48,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:12:48,592 INFO L87 Difference]: Start difference. First operand 1214 states and 2917 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:50,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:50,674 INFO L93 Difference]: Finished difference Result 3275 states and 8059 transitions. [2021-06-05 05:12:50,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:12:50,675 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:50,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:50,677 INFO L225 Difference]: With dead ends: 3275 [2021-06-05 05:12:50,677 INFO L226 Difference]: Without dead ends: 3260 [2021-06-05 05:12:50,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 1617.1ms TimeCoverageRelationStatistics Valid=613, Invalid=3047, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:12:50,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3260 states. [2021-06-05 05:12:50,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3260 to 1247. [2021-06-05 05:12:50,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 2.408507223113965) internal successors, (3001), 1246 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:50,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 3001 transitions. [2021-06-05 05:12:50,699 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 3001 transitions. Word has length 30 [2021-06-05 05:12:50,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:50,699 INFO L482 AbstractCegarLoop]: Abstraction has 1247 states and 3001 transitions. [2021-06-05 05:12:50,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:50,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 3001 transitions. [2021-06-05 05:12:50,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:50,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:50,700 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:50,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:50,905 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:50,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:50,905 INFO L82 PathProgramCache]: Analyzing trace with hash -159248845, now seen corresponding path program 92 times [2021-06-05 05:12:50,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:50,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120873062] [2021-06-05 05:12:50,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:51,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:51,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:51,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120873062] [2021-06-05 05:12:51,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120873062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:51,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598718910] [2021-06-05 05:12:51,123 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:51,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:51,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:51,145 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:51,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:51,290 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 20 treesize of output 12 [2021-06-05 05:12:51,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:51,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:51,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:51,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:12:51,324 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:51,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598718910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:51,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:51,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 05:12:51,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197743155] [2021-06-05 05:12:51,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:12:51,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:51,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:12:51,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:12:51,325 INFO L87 Difference]: Start difference. First operand 1247 states and 3001 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:52,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:52,524 INFO L93 Difference]: Finished difference Result 2763 states and 6781 transitions. [2021-06-05 05:12:52,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:12:52,525 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:52,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:52,527 INFO L225 Difference]: With dead ends: 2763 [2021-06-05 05:12:52,527 INFO L226 Difference]: Without dead ends: 2746 [2021-06-05 05:12:52,527 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1000.3ms TimeCoverageRelationStatistics Valid=315, Invalid=1491, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:12:52,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2021-06-05 05:12:52,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 1238. [2021-06-05 05:12:52,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 2.406628940986257) internal successors, (2977), 1237 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:52,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 2977 transitions. [2021-06-05 05:12:52,541 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 2977 transitions. Word has length 30 [2021-06-05 05:12:52,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:52,541 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 2977 transitions. [2021-06-05 05:12:52,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:52,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 2977 transitions. [2021-06-05 05:12:52,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:52,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:52,542 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:52,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2021-06-05 05:12:52,743 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:52,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:52,743 INFO L82 PathProgramCache]: Analyzing trace with hash 839004465, now seen corresponding path program 93 times [2021-06-05 05:12:52,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:52,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919754231] [2021-06-05 05:12:52,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:52,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:52,962 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:52,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:52,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919754231] [2021-06-05 05:12:52,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919754231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:52,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982500531] [2021-06-05 05:12:52,962 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:52,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:12:52,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:52,985 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:52,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:53,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:12:53,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:53,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:53,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:53,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:12:53,201 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:53,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982500531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:53,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:53,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:12:53,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966370361] [2021-06-05 05:12:53,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:12:53,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:53,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:12:53,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:12:53,202 INFO L87 Difference]: Start difference. First operand 1238 states and 2977 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:54,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:54,795 INFO L93 Difference]: Finished difference Result 2624 states and 6425 transitions. [2021-06-05 05:12:54,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:12:54,795 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:12:54,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:54,798 INFO L225 Difference]: With dead ends: 2624 [2021-06-05 05:12:54,798 INFO L226 Difference]: Without dead ends: 2605 [2021-06-05 05:12:54,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1170.4ms TimeCoverageRelationStatistics Valid=392, Invalid=1770, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:12:54,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2021-06-05 05:12:54,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 1226. [2021-06-05 05:12:54,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1225 states have (on average 2.4081632653061225) internal successors, (2950), 1225 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:54,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 2950 transitions. [2021-06-05 05:12:54,811 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 2950 transitions. Word has length 30 [2021-06-05 05:12:54,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:54,811 INFO L482 AbstractCegarLoop]: Abstraction has 1226 states and 2950 transitions. [2021-06-05 05:12:54,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:54,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 2950 transitions. [2021-06-05 05:12:54,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:54,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:54,812 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:55,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-06-05 05:12:55,013 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:55,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:55,013 INFO L82 PathProgramCache]: Analyzing trace with hash 448898545, now seen corresponding path program 94 times [2021-06-05 05:12:55,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:55,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351190698] [2021-06-05 05:12:55,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:55,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:55,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:55,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:55,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351190698] [2021-06-05 05:12:55,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351190698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:55,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262676304] [2021-06-05 05:12:55,236 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:55,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:12:55,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:55,269 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:55,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:55,408 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 20 treesize of output 12 [2021-06-05 05:12:55,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:55,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:55,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:55,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:12:55,448 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:55,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262676304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:55,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:55,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 05:12:55,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368386273] [2021-06-05 05:12:55,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:12:55,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:55,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:12:55,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:12:55,449 INFO L87 Difference]: Start difference. First operand 1226 states and 2950 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:57,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:57,168 INFO L93 Difference]: Finished difference Result 3344 states and 8301 transitions. [2021-06-05 05:12:57,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:12:57,169 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 30 [2021-06-05 05:12:57,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:57,172 INFO L225 Difference]: With dead ends: 3344 [2021-06-05 05:12:57,172 INFO L226 Difference]: Without dead ends: 3331 [2021-06-05 05:12:57,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1350.6ms TimeCoverageRelationStatistics Valid=491, Invalid=2265, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:12:57,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3331 states. [2021-06-05 05:12:57,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3331 to 1247. [2021-06-05 05:12:57,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 2.4109149277688604) internal successors, (3004), 1246 states have internal predecessors, (3004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:57,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 3004 transitions. [2021-06-05 05:12:57,188 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 3004 transitions. Word has length 30 [2021-06-05 05:12:57,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:57,188 INFO L482 AbstractCegarLoop]: Abstraction has 1247 states and 3004 transitions. [2021-06-05 05:12:57,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:57,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 3004 transitions. [2021-06-05 05:12:57,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:57,189 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:57,189 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:57,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable532,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:57,392 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:57,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:57,393 INFO L82 PathProgramCache]: Analyzing trace with hash -2089667701, now seen corresponding path program 95 times [2021-06-05 05:12:57,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:57,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090601217] [2021-06-05 05:12:57,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:12:57,643 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:57,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:12:57,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090601217] [2021-06-05 05:12:57,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090601217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:57,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134400166] [2021-06-05 05:12:57,643 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:57,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:12:57,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:57,668 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:12:57,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:57,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:12:57,820 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 29 treesize of output 17 [2021-06-05 05:12:57,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:12:57,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:12:57,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:12:57,824 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-06-05 05:12:57,854 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:12:57,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134400166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:12:57,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:12:57,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 05:12:57,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549377633] [2021-06-05 05:12:57,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:12:57,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:12:57,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:12:57,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:12:57,855 INFO L87 Difference]: Start difference. First operand 1247 states and 3004 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:59,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:59,624 INFO L93 Difference]: Finished difference Result 2967 states and 7340 transitions. [2021-06-05 05:12:59,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:12:59,624 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 30 [2021-06-05 05:12:59,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:59,627 INFO L225 Difference]: With dead ends: 2967 [2021-06-05 05:12:59,627 INFO L226 Difference]: Without dead ends: 2950 [2021-06-05 05:12:59,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1255.4ms TimeCoverageRelationStatistics Valid=400, Invalid=1952, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:12:59,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2950 states. [2021-06-05 05:12:59,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2950 to 1238. [2021-06-05 05:12:59,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 2.4098625707356507) internal successors, (2981), 1237 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:59,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 2981 transitions. [2021-06-05 05:12:59,641 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 2981 transitions. Word has length 30 [2021-06-05 05:12:59,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:59,641 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 2981 transitions. [2021-06-05 05:12:59,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:59,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 2981 transitions. [2021-06-05 05:12:59,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:12:59,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:59,642 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:12:59,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable533 [2021-06-05 05:12:59,843 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:59,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:59,843 INFO L82 PathProgramCache]: Analyzing trace with hash -560713633, now seen corresponding path program 96 times [2021-06-05 05:12:59,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:59,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098505717] [2021-06-05 05:12:59,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:59,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:00,065 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:00,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:00,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098505717] [2021-06-05 05:13:00,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098505717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:00,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406833216] [2021-06-05 05:13:00,066 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:00,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:13:00,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:13:00,093 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:13:00,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:00,288 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 19 treesize of output 11 [2021-06-05 05:13:00,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:00,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:00,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:00,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 05:13:00,326 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:00,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406833216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:00,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:00,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 05:13:00,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156499025] [2021-06-05 05:13:00,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:13:00,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:00,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:13:00,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:13:00,327 INFO L87 Difference]: Start difference. First operand 1238 states and 2981 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:01,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:13:01,680 INFO L93 Difference]: Finished difference Result 2622 states and 6462 transitions. [2021-06-05 05:13:01,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:13:01,681 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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 30 [2021-06-05 05:13:01,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:13:01,683 INFO L225 Difference]: With dead ends: 2622 [2021-06-05 05:13:01,683 INFO L226 Difference]: Without dead ends: 2612 [2021-06-05 05:13:01,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 956.5ms TimeCoverageRelationStatistics Valid=270, Invalid=1622, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:13:01,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2612 states. [2021-06-05 05:13:01,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2612 to 1229. [2021-06-05 05:13:01,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 1228 states have (on average 2.4079804560260585) internal successors, (2957), 1228 states have internal predecessors, (2957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:01,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 2957 transitions. [2021-06-05 05:13:01,696 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 2957 transitions. Word has length 30 [2021-06-05 05:13:01,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:13:01,696 INFO L482 AbstractCegarLoop]: Abstraction has 1229 states and 2957 transitions. [2021-06-05 05:13:01,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:13:01,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 2957 transitions. [2021-06-05 05:13:01,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:13:01,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:13:01,697 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:13:01,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:01,898 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:13:01,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:13:01,898 INFO L82 PathProgramCache]: Analyzing trace with hash 513532051, now seen corresponding path program 97 times [2021-06-05 05:13:01,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:13:01,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968045911] [2021-06-05 05:13:01,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:13:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:02,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:02,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:13:02,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968045911] [2021-06-05 05:13:02,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968045911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:02,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675537493] [2021-06-05 05:13:02,136 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:13:02,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:13:02,159 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:13:02,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:13:08,936 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-06-05 05:13:08,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 64 [2021-06-05 05:13:08,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:13:08,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:13:08,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:13:08,942 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:92, output treesize:11 [2021-06-05 05:13:08,976 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:13:08,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675537493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:13:08,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:13:08,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 05:13:08,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598409565] [2021-06-05 05:13:08,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:13:08,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:13:08,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:13:08,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:13:08,977 INFO L87 Difference]: Start difference. First operand 1229 states and 2957 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:09,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:09,817 INFO L93 Difference]: Finished difference Result 2889 states and 7139 transitions. [2021-06-05 05:15:09,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:15:09,817 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 30 [2021-06-05 05:15:09,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:09,820 INFO L225 Difference]: With dead ends: 2889 [2021-06-05 05:15:09,820 INFO L226 Difference]: Without dead ends: 2876 [2021-06-05 05:15:09,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 20284.2ms TimeCoverageRelationStatistics Valid=326, Invalid=1563, Unknown=3, NotChecked=0, Total=1892 [2021-06-05 05:15:09,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-06-05 05:15:09,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 1241. [2021-06-05 05:15:09,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 2.4088709677419353) internal successors, (2987), 1240 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:09,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 2987 transitions. [2021-06-05 05:15:09,834 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 2987 transitions. Word has length 30 [2021-06-05 05:15:09,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:09,834 INFO L482 AbstractCegarLoop]: Abstraction has 1241 states and 2987 transitions. [2021-06-05 05:15:09,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:09,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 2987 transitions. [2021-06-05 05:15:09,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:09,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:09,835 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:10,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-06-05 05:15:10,037 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:10,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:10,037 INFO L82 PathProgramCache]: Analyzing trace with hash -2025034195, now seen corresponding path program 98 times [2021-06-05 05:15:10,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:10,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763460877] [2021-06-05 05:15:10,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:10,405 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:10,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:10,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763460877] [2021-06-05 05:15:10,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763460877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:10,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069010194] [2021-06-05 05:15:10,406 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:10,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:15:10,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:10,428 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:10,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:10,641 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 20 treesize of output 12 [2021-06-05 05:15:10,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:10,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:10,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:10,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:15:10,685 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:10,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069010194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:10,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:10,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 05:15:10,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308283956] [2021-06-05 05:15:10,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:15:10,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:10,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:15:10,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:15:10,686 INFO L87 Difference]: Start difference. First operand 1241 states and 2987 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:12,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:12,327 INFO L93 Difference]: Finished difference Result 2643 states and 6495 transitions. [2021-06-05 05:15:12,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:15:12,328 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 30 [2021-06-05 05:15:12,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:12,330 INFO L225 Difference]: With dead ends: 2643 [2021-06-05 05:15:12,330 INFO L226 Difference]: Without dead ends: 2626 [2021-06-05 05:15:12,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 1367.7ms TimeCoverageRelationStatistics Valid=263, Invalid=1377, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:15:12,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-06-05 05:15:12,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 1232. [2021-06-05 05:15:12,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1231 states have (on average 2.4069861900893583) internal successors, (2963), 1231 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:12,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 2963 transitions. [2021-06-05 05:15:12,344 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 2963 transitions. Word has length 30 [2021-06-05 05:15:12,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:12,344 INFO L482 AbstractCegarLoop]: Abstraction has 1232 states and 2963 transitions. [2021-06-05 05:15:12,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:12,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 2963 transitions. [2021-06-05 05:15:12,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:12,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:12,345 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:12,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-06-05 05:15:12,545 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:12,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:12,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1911058279, now seen corresponding path program 99 times [2021-06-05 05:15:12,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:12,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587842108] [2021-06-05 05:15:12,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:12,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:12,897 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:12,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:12,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587842108] [2021-06-05 05:15:12,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587842108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:12,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846257] [2021-06-05 05:15:12,897 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:12,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:15:12,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:12,919 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:15:12,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:13,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:13,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:15:13,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:13,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:13,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:13,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:92 [2021-06-05 05:15:13,617 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-06-05 05:15:13,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:13,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:13,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:13,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-05 05:15:13,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361373477] [2021-06-05 05:15:13,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:15:13,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:13,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:15:13,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:15:13,661 INFO L87 Difference]: Start difference. First operand 1232 states and 2963 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:13,885 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-06-05 05:15:14,405 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-05 05:15:14,587 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 35 [2021-06-05 05:15:15,039 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2021-06-05 05:15:15,209 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2021-06-05 05:15:16,081 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 48 [2021-06-05 05:15:16,314 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 46 [2021-06-05 05:15:16,836 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-06-05 05:15:17,285 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-06-05 05:15:17,813 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-06-05 05:15:18,217 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-06-05 05:15:18,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:18,621 INFO L93 Difference]: Finished difference Result 2745 states and 6698 transitions. [2021-06-05 05:15:18,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:15:18,621 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:18,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:18,624 INFO L225 Difference]: With dead ends: 2745 [2021-06-05 05:15:18,624 INFO L226 Difference]: Without dead ends: 2729 [2021-06-05 05:15:18,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 4438.5ms TimeCoverageRelationStatistics Valid=718, Invalid=3838, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 05:15:18,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2021-06-05 05:15:18,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 1230. [2021-06-05 05:15:18,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 2.406834825061025) internal successors, (2958), 1229 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:18,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 2958 transitions. [2021-06-05 05:15:18,638 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 2958 transitions. Word has length 30 [2021-06-05 05:15:18,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:18,638 INFO L482 AbstractCegarLoop]: Abstraction has 1230 states and 2958 transitions. [2021-06-05 05:15:18,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:18,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 2958 transitions. [2021-06-05 05:15:18,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:18,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:18,639 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:18,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable537 [2021-06-05 05:15:18,840 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:18,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:18,840 INFO L82 PathProgramCache]: Analyzing trace with hash -873028603, now seen corresponding path program 100 times [2021-06-05 05:15:18,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:18,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818741875] [2021-06-05 05:15:18,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:19,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:19,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:19,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818741875] [2021-06-05 05:15:19,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818741875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:19,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754119931] [2021-06-05 05:15:19,123 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:19,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:15:19,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:19,145 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:19,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:19,375 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 20 treesize of output 12 [2021-06-05 05:15:19,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:19,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:19,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:19,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:15:19,414 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:19,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754119931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:19,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:19,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:15:19,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056700272] [2021-06-05 05:15:19,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:15:19,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:19,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:15:19,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:15:19,415 INFO L87 Difference]: Start difference. First operand 1230 states and 2958 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:21,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:21,354 INFO L93 Difference]: Finished difference Result 2845 states and 6936 transitions. [2021-06-05 05:15:21,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:15:21,354 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:21,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:21,357 INFO L225 Difference]: With dead ends: 2845 [2021-06-05 05:15:21,357 INFO L226 Difference]: Without dead ends: 2820 [2021-06-05 05:15:21,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1480.8ms TimeCoverageRelationStatistics Valid=356, Invalid=1536, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:15:21,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2021-06-05 05:15:21,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 1248. [2021-06-05 05:15:21,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 2.4073777064955895) internal successors, (3002), 1247 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:21,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 3002 transitions. [2021-06-05 05:15:21,371 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 3002 transitions. Word has length 30 [2021-06-05 05:15:21,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:21,371 INFO L482 AbstractCegarLoop]: Abstraction has 1248 states and 3002 transitions. [2021-06-05 05:15:21,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:21,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 3002 transitions. [2021-06-05 05:15:21,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:21,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:21,372 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:21,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable547,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:21,573 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:21,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:21,573 INFO L82 PathProgramCache]: Analyzing trace with hash -97257179, now seen corresponding path program 101 times [2021-06-05 05:15:21,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:21,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51872430] [2021-06-05 05:15:21,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:21,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:21,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51872430] [2021-06-05 05:15:21,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51872430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:21,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492434390] [2021-06-05 05:15:21,853 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:21,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:15:21,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:21,875 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:21,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:22,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:15:22,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:22,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:22,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:22,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:15:22,134 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:22,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492434390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:22,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:22,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:15:22,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094189529] [2021-06-05 05:15:22,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:15:22,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:22,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:15:22,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:15:22,135 INFO L87 Difference]: Start difference. First operand 1248 states and 3002 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:24,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:24,596 INFO L93 Difference]: Finished difference Result 3370 states and 8294 transitions. [2021-06-05 05:15:24,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:15:24,596 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:24,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:24,600 INFO L225 Difference]: With dead ends: 3370 [2021-06-05 05:15:24,600 INFO L226 Difference]: Without dead ends: 3357 [2021-06-05 05:15:24,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 1772.3ms TimeCoverageRelationStatistics Valid=504, Invalid=2252, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:15:24,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3357 states. [2021-06-05 05:15:24,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3357 to 1264. [2021-06-05 05:15:24,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1263 states have (on average 2.410134600158353) internal successors, (3044), 1263 states have internal predecessors, (3044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:24,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 3044 transitions. [2021-06-05 05:15:24,621 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 3044 transitions. Word has length 30 [2021-06-05 05:15:24,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:24,622 INFO L482 AbstractCegarLoop]: Abstraction has 1264 states and 3044 transitions. [2021-06-05 05:15:24,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:24,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 3044 transitions. [2021-06-05 05:15:24,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:24,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:24,623 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:24,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:24,823 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:24,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:24,823 INFO L82 PathProgramCache]: Analyzing trace with hash 567945989, now seen corresponding path program 102 times [2021-06-05 05:15:24,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:24,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353733982] [2021-06-05 05:15:24,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:24,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:25,093 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:25,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:25,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353733982] [2021-06-05 05:15:25,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353733982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:25,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731746111] [2021-06-05 05:15:25,093 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:25,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:15:25,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:25,119 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:15:25,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:25,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:25,412 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:25,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:15:25,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:25,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:25,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:25,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:41 [2021-06-05 05:15:25,592 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:25,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731746111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:25,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:25,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-06-05 05:15:25,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805554285] [2021-06-05 05:15:25,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:15:25,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:25,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:15:25,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:15:25,593 INFO L87 Difference]: Start difference. First operand 1264 states and 3044 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:28,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:28,172 INFO L93 Difference]: Finished difference Result 2831 states and 6958 transitions. [2021-06-05 05:15:28,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:15:28,172 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:28,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:28,175 INFO L225 Difference]: With dead ends: 2831 [2021-06-05 05:15:28,175 INFO L226 Difference]: Without dead ends: 2814 [2021-06-05 05:15:28,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 2026.1ms TimeCoverageRelationStatistics Valid=396, Invalid=2054, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:15:28,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2814 states. [2021-06-05 05:15:28,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 1283. [2021-06-05 05:15:28,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 2.4110764430577225) internal successors, (3091), 1282 states have internal predecessors, (3091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:28,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 3091 transitions. [2021-06-05 05:15:28,189 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 3091 transitions. Word has length 30 [2021-06-05 05:15:28,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:28,189 INFO L482 AbstractCegarLoop]: Abstraction has 1283 states and 3091 transitions. [2021-06-05 05:15:28,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:28,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 3091 transitions. [2021-06-05 05:15:28,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:28,190 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:28,190 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:28,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:28,390 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:28,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:28,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1566199299, now seen corresponding path program 103 times [2021-06-05 05:15:28,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:28,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982082702] [2021-06-05 05:15:28,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:28,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:28,677 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:28,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:28,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982082702] [2021-06-05 05:15:28,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982082702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:28,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787790957] [2021-06-05 05:15:28,677 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:28,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:28,710 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:28,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:28,962 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 20 treesize of output 12 [2021-06-05 05:15:28,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:28,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:28,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:28,965 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:15:29,004 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:29,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787790957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:29,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:29,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:15:29,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331558235] [2021-06-05 05:15:29,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:15:29,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:29,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:15:29,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:15:29,005 INFO L87 Difference]: Start difference. First operand 1283 states and 3091 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:30,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:30,995 INFO L93 Difference]: Finished difference Result 2800 states and 6833 transitions. [2021-06-05 05:15:30,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:15:30,995 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:30,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:30,998 INFO L225 Difference]: With dead ends: 2800 [2021-06-05 05:15:30,998 INFO L226 Difference]: Without dead ends: 2781 [2021-06-05 05:15:30,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1511.7ms TimeCoverageRelationStatistics Valid=374, Invalid=1606, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:15:31,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2781 states. [2021-06-05 05:15:31,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2781 to 1267. [2021-06-05 05:15:31,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1266 states have (on average 2.4091627172195893) internal successors, (3050), 1266 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:31,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 3050 transitions. [2021-06-05 05:15:31,012 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 3050 transitions. Word has length 30 [2021-06-05 05:15:31,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:31,012 INFO L482 AbstractCegarLoop]: Abstraction has 1267 states and 3050 transitions. [2021-06-05 05:15:31,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:31,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 3050 transitions. [2021-06-05 05:15:31,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:31,013 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:31,013 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:31,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable555 [2021-06-05 05:15:31,213 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:31,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:31,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1951631435, now seen corresponding path program 104 times [2021-06-05 05:15:31,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:31,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260964389] [2021-06-05 05:15:31,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:31,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:31,470 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:31,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:31,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260964389] [2021-06-05 05:15:31,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260964389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:31,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276728066] [2021-06-05 05:15:31,470 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:31,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:15:31,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:31,492 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:31,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:31,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:15:31,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:31,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:31,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:31,740 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:15:31,774 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:31,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276728066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:31,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:31,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:15:31,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132893200] [2021-06-05 05:15:31,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:15:31,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:31,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:15:31,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:15:31,775 INFO L87 Difference]: Start difference. First operand 1267 states and 3050 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:33,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:33,182 INFO L93 Difference]: Finished difference Result 2728 states and 6676 transitions. [2021-06-05 05:15:33,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:15:33,183 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:33,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:33,185 INFO L225 Difference]: With dead ends: 2728 [2021-06-05 05:15:33,186 INFO L226 Difference]: Without dead ends: 2719 [2021-06-05 05:15:33,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 922.8ms TimeCoverageRelationStatistics Valid=223, Invalid=1037, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:15:33,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2719 states. [2021-06-05 05:15:33,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2719 to 1264. [2021-06-05 05:15:33,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1263 states have (on average 2.4093428345209817) internal successors, (3043), 1263 states have internal predecessors, (3043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:33,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 3043 transitions. [2021-06-05 05:15:33,199 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 3043 transitions. Word has length 30 [2021-06-05 05:15:33,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:33,199 INFO L482 AbstractCegarLoop]: Abstraction has 1264 states and 3043 transitions. [2021-06-05 05:15:33,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:33,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 3043 transitions. [2021-06-05 05:15:33,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:33,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:33,200 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:33,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-06-05 05:15:33,401 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:33,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:33,401 INFO L82 PathProgramCache]: Analyzing trace with hash -820062243, now seen corresponding path program 66 times [2021-06-05 05:15:33,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:33,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065355016] [2021-06-05 05:15:33,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:33,706 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:33,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:33,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065355016] [2021-06-05 05:15:33,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065355016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:33,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647992609] [2021-06-05 05:15:33,706 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:33,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:15:33,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:33,731 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:33,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:33,982 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 19 treesize of output 11 [2021-06-05 05:15:33,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:33,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:33,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:33,986 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 05:15:34,021 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:34,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647992609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:34,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:34,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:15:34,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901568644] [2021-06-05 05:15:34,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:15:34,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:34,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:15:34,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:15:34,022 INFO L87 Difference]: Start difference. First operand 1264 states and 3043 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:35,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:35,519 INFO L93 Difference]: Finished difference Result 2758 states and 6750 transitions. [2021-06-05 05:15:35,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:15:35,519 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:35,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:35,522 INFO L225 Difference]: With dead ends: 2758 [2021-06-05 05:15:35,522 INFO L226 Difference]: Without dead ends: 2749 [2021-06-05 05:15:35,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 977.9ms TimeCoverageRelationStatistics Valid=202, Invalid=1058, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:15:35,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2749 states. [2021-06-05 05:15:35,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2749 to 1299. [2021-06-05 05:15:35,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 2.403697996918336) internal successors, (3120), 1298 states have internal predecessors, (3120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:35,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 3120 transitions. [2021-06-05 05:15:35,537 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 3120 transitions. Word has length 30 [2021-06-05 05:15:35,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:35,537 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 3120 transitions. [2021-06-05 05:15:35,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:35,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 3120 transitions. [2021-06-05 05:15:35,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:35,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:35,538 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:35,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable557 [2021-06-05 05:15:35,739 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:35,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:35,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1109789857, now seen corresponding path program 67 times [2021-06-05 05:15:35,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:35,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105472807] [2021-06-05 05:15:35,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:35,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:36,010 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:36,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:36,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105472807] [2021-06-05 05:15:36,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105472807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:36,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460178645] [2021-06-05 05:15:36,010 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:36,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:36,033 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:36,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:36,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:36,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 05:15:36,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:36,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:36,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:36,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-06-05 05:15:36,311 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:36,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460178645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:36,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:36,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:15:36,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802765130] [2021-06-05 05:15:36,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:15:36,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:36,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:15:36,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:15:36,312 INFO L87 Difference]: Start difference. First operand 1299 states and 3120 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:37,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:37,935 INFO L93 Difference]: Finished difference Result 2893 states and 7061 transitions. [2021-06-05 05:15:37,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:15:37,936 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:37,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:37,939 INFO L225 Difference]: With dead ends: 2893 [2021-06-05 05:15:37,939 INFO L226 Difference]: Without dead ends: 2876 [2021-06-05 05:15:37,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1106.1ms TimeCoverageRelationStatistics Valid=272, Invalid=1210, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:15:37,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-06-05 05:15:37,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 1317. [2021-06-05 05:15:37,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317 states, 1316 states have (on average 2.4065349544072947) internal successors, (3167), 1316 states have internal predecessors, (3167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:37,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 3167 transitions. [2021-06-05 05:15:37,958 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 3167 transitions. Word has length 30 [2021-06-05 05:15:37,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:37,959 INFO L482 AbstractCegarLoop]: Abstraction has 1317 states and 3167 transitions. [2021-06-05 05:15:37,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:37,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 3167 transitions. [2021-06-05 05:15:37,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:37,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:37,960 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:38,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-06-05 05:15:38,160 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:38,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:38,160 INFO L82 PathProgramCache]: Analyzing trace with hash 783714749, now seen corresponding path program 68 times [2021-06-05 05:15:38,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:38,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124333340] [2021-06-05 05:15:38,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:38,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:38,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:38,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124333340] [2021-06-05 05:15:38,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124333340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:38,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248039367] [2021-06-05 05:15:38,417 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 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:38,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:15:38,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:38,439 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:38,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:38,648 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 20 treesize of output 12 [2021-06-05 05:15:38,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:38,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:38,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:38,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:15:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:38,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248039367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:38,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:38,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:15:38,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050823040] [2021-06-05 05:15:38,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:15:38,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:38,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:15:38,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:15:38,711 INFO L87 Difference]: Start difference. First operand 1317 states and 3167 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:40,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:40,713 INFO L93 Difference]: Finished difference Result 3353 states and 8243 transitions. [2021-06-05 05:15:40,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:15:40,713 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:40,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:40,717 INFO L225 Difference]: With dead ends: 3353 [2021-06-05 05:15:40,717 INFO L226 Difference]: Without dead ends: 3340 [2021-06-05 05:15:40,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1319.4ms TimeCoverageRelationStatistics Valid=362, Invalid=1708, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:15:40,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3340 states. [2021-06-05 05:15:40,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3340 to 1317. [2021-06-05 05:15:40,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317 states, 1316 states have (on average 2.4065349544072947) internal successors, (3167), 1316 states have internal predecessors, (3167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:40,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 3167 transitions. [2021-06-05 05:15:40,734 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 3167 transitions. Word has length 30 [2021-06-05 05:15:40,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:40,734 INFO L482 AbstractCegarLoop]: Abstraction has 1317 states and 3167 transitions. [2021-06-05 05:15:40,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:40,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 3167 transitions. [2021-06-05 05:15:40,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:40,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:40,735 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:40,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:40,935 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:40,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:40,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1448917917, now seen corresponding path program 69 times [2021-06-05 05:15:40,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:40,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152464001] [2021-06-05 05:15:40,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:40,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:41,195 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:41,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:41,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152464001] [2021-06-05 05:15:41,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152464001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:41,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032117379] [2021-06-05 05:15:41,196 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 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:41,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:15:41,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:41,219 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:41,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:41,446 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 20 treesize of output 12 [2021-06-05 05:15:41,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:41,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:41,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:41,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:15:41,487 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:41,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032117379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:41,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:41,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 05:15:41,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118829154] [2021-06-05 05:15:41,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:15:41,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:41,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:15:41,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:15:41,488 INFO L87 Difference]: Start difference. First operand 1317 states and 3167 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:43,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:43,198 INFO L93 Difference]: Finished difference Result 2888 states and 7090 transitions. [2021-06-05 05:15:43,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:15:43,199 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:43,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:43,202 INFO L225 Difference]: With dead ends: 2888 [2021-06-05 05:15:43,202 INFO L226 Difference]: Without dead ends: 2870 [2021-06-05 05:15:43,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 1026.9ms TimeCoverageRelationStatistics Valid=220, Invalid=1262, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:15:43,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2870 states. [2021-06-05 05:15:43,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2870 to 1302. [2021-06-05 05:15:43,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 2.4035357417371253) internal successors, (3127), 1301 states have internal predecessors, (3127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:43,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 3127 transitions. [2021-06-05 05:15:43,217 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 3127 transitions. Word has length 30 [2021-06-05 05:15:43,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:43,217 INFO L482 AbstractCegarLoop]: Abstraction has 1302 states and 3127 transitions. [2021-06-05 05:15:43,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:43,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 3127 transitions. [2021-06-05 05:15:43,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:43,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:43,218 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:43,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:43,419 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:43,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:43,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1912243731, now seen corresponding path program 70 times [2021-06-05 05:15:43,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:43,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070162627] [2021-06-05 05:15:43,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:43,677 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:43,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:43,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070162627] [2021-06-05 05:15:43,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070162627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:43,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861898613] [2021-06-05 05:15:43,677 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:43,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:15:43,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:43,700 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:43,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:43,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:15:43,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 05:15:43,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:43,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:43,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:43,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-06-05 05:15:43,992 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:43,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861898613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:43,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:43,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:15:43,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069148371] [2021-06-05 05:15:43,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:15:43,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:43,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:15:43,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:15:43,993 INFO L87 Difference]: Start difference. First operand 1302 states and 3127 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:45,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:45,346 INFO L93 Difference]: Finished difference Result 2738 states and 6704 transitions. [2021-06-05 05:15:45,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:15:45,347 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:45,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:45,349 INFO L225 Difference]: With dead ends: 2738 [2021-06-05 05:15:45,349 INFO L226 Difference]: Without dead ends: 2729 [2021-06-05 05:15:45,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 926.8ms TimeCoverageRelationStatistics Valid=207, Invalid=1053, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:15:45,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2021-06-05 05:15:45,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 1299. [2021-06-05 05:15:45,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 2.403697996918336) internal successors, (3120), 1298 states have internal predecessors, (3120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:45,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 3120 transitions. [2021-06-05 05:15:45,363 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 3120 transitions. Word has length 30 [2021-06-05 05:15:45,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:45,363 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 3120 transitions. [2021-06-05 05:15:45,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:45,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 3120 transitions. [2021-06-05 05:15:45,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:45,364 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:45,364 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:45,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable561 [2021-06-05 05:15:45,565 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:45,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:45,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1832618439, now seen corresponding path program 71 times [2021-06-05 05:15:45,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:45,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518811219] [2021-06-05 05:15:45,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:45,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:45,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:45,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518811219] [2021-06-05 05:15:45,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518811219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:45,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454236699] [2021-06-05 05:15:45,866 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 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:45,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:15:45,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:45,888 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:45,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:46,121 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 19 treesize of output 11 [2021-06-05 05:15:46,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:46,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:46,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:46,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 05:15:46,156 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:46,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454236699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:46,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:46,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:15:46,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447737931] [2021-06-05 05:15:46,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:15:46,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:46,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:15:46,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:15:46,156 INFO L87 Difference]: Start difference. First operand 1299 states and 3120 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:47,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:47,840 INFO L93 Difference]: Finished difference Result 2709 states and 6643 transitions. [2021-06-05 05:15:47,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:15:47,840 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:47,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:47,843 INFO L225 Difference]: With dead ends: 2709 [2021-06-05 05:15:47,843 INFO L226 Difference]: Without dead ends: 2692 [2021-06-05 05:15:47,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1284.4ms TimeCoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:15:47,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2692 states. [2021-06-05 05:15:47,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2692 to 1312. [2021-06-05 05:15:47,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1311 states have (on average 2.404271548436308) internal successors, (3152), 1311 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:47,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 3152 transitions. [2021-06-05 05:15:47,857 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 3152 transitions. Word has length 30 [2021-06-05 05:15:47,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:47,857 INFO L482 AbstractCegarLoop]: Abstraction has 1312 states and 3152 transitions. [2021-06-05 05:15:47,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:47,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 3152 transitions. [2021-06-05 05:15:47,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:47,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:47,858 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:48,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable562,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:48,058 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:48,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:48,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1212131303, now seen corresponding path program 72 times [2021-06-05 05:15:48,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:48,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381353608] [2021-06-05 05:15:48,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:48,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:48,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:48,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:48,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381353608] [2021-06-05 05:15:48,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381353608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:48,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677651780] [2021-06-05 05:15:48,367 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 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:48,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:15:48,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:48,391 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:48,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:48,603 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 20 treesize of output 12 [2021-06-05 05:15:48,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:48,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:48,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:48,608 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:15:48,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:48,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677651780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:48,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:48,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:15:48,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114370822] [2021-06-05 05:15:48,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:15:48,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:48,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:15:48,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:15:48,661 INFO L87 Difference]: Start difference. First operand 1312 states and 3152 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:50,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:50,939 INFO L93 Difference]: Finished difference Result 3265 states and 8036 transitions. [2021-06-05 05:15:50,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:15:50,939 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:50,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:50,943 INFO L225 Difference]: With dead ends: 3265 [2021-06-05 05:15:50,943 INFO L226 Difference]: Without dead ends: 3250 [2021-06-05 05:15:50,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1603.3ms TimeCoverageRelationStatistics Valid=443, Invalid=2007, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:15:50,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2021-06-05 05:15:50,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 1312. [2021-06-05 05:15:50,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1311 states have (on average 2.404271548436308) internal successors, (3152), 1311 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:50,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 3152 transitions. [2021-06-05 05:15:50,964 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 3152 transitions. Word has length 30 [2021-06-05 05:15:50,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:50,964 INFO L482 AbstractCegarLoop]: Abstraction has 1312 states and 3152 transitions. [2021-06-05 05:15:50,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:50,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 3152 transitions. [2021-06-05 05:15:50,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:50,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:50,965 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:51,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable563 [2021-06-05 05:15:51,165 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:51,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:51,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1877334471, now seen corresponding path program 73 times [2021-06-05 05:15:51,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:51,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631197681] [2021-06-05 05:15:51,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:51,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:51,462 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:51,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:51,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631197681] [2021-06-05 05:15:51,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631197681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:51,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702031283] [2021-06-05 05:15:51,462 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 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:51,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:51,484 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:51,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:51,677 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 20 treesize of output 12 [2021-06-05 05:15:51,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:51,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:51,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:51,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:15:51,717 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:51,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702031283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:51,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:51,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 05:15:51,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118326421] [2021-06-05 05:15:51,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:15:51,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:51,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:15:51,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:15:51,718 INFO L87 Difference]: Start difference. First operand 1312 states and 3152 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:53,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:53,573 INFO L93 Difference]: Finished difference Result 2759 states and 6774 transitions. [2021-06-05 05:15:53,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:15:53,574 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:15:53,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:53,576 INFO L225 Difference]: With dead ends: 2759 [2021-06-05 05:15:53,576 INFO L226 Difference]: Without dead ends: 2740 [2021-06-05 05:15:53,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1231.7ms TimeCoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:15:53,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2740 states. [2021-06-05 05:15:53,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2740 to 1303. [2021-06-05 05:15:53,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1302 states have (on average 2.403225806451613) internal successors, (3129), 1302 states have internal predecessors, (3129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:53,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 3129 transitions. [2021-06-05 05:15:53,591 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 3129 transitions. Word has length 30 [2021-06-05 05:15:53,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:53,591 INFO L482 AbstractCegarLoop]: Abstraction has 1303 states and 3129 transitions. [2021-06-05 05:15:53,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:53,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 3129 transitions. [2021-06-05 05:15:53,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:53,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:53,592 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:53,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable564,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:53,792 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:53,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:53,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1995303287, now seen corresponding path program 74 times [2021-06-05 05:15:53,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:53,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964090349] [2021-06-05 05:15:53,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:53,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:54,071 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:54,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:54,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964090349] [2021-06-05 05:15:54,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964090349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:54,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886724080] [2021-06-05 05:15:54,071 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 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:54,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:15:54,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:54,093 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:54,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:54,280 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 20 treesize of output 12 [2021-06-05 05:15:54,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:54,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:54,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:54,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:15:54,321 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:54,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886724080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:54,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:54,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 05:15:54,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996586577] [2021-06-05 05:15:54,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:15:54,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:54,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:15:54,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:15:54,321 INFO L87 Difference]: Start difference. First operand 1303 states and 3129 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:56,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:56,220 INFO L93 Difference]: Finished difference Result 3016 states and 7475 transitions. [2021-06-05 05:15:56,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:15:56,221 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 30 [2021-06-05 05:15:56,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:56,224 INFO L225 Difference]: With dead ends: 3016 [2021-06-05 05:15:56,224 INFO L226 Difference]: Without dead ends: 3003 [2021-06-05 05:15:56,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1368.5ms TimeCoverageRelationStatistics Valid=305, Invalid=1857, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:15:56,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3003 states. [2021-06-05 05:15:56,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3003 to 1306. [2021-06-05 05:15:56,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 2.403065134099617) internal successors, (3136), 1305 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:56,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 3136 transitions. [2021-06-05 05:15:56,239 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 3136 transitions. Word has length 30 [2021-06-05 05:15:56,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:56,239 INFO L482 AbstractCegarLoop]: Abstraction has 1306 states and 3136 transitions. [2021-06-05 05:15:56,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:56,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 3136 transitions. [2021-06-05 05:15:56,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:56,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:56,240 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:56,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2021-06-05 05:15:56,441 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:56,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:56,441 INFO L82 PathProgramCache]: Analyzing trace with hash -238902237, now seen corresponding path program 75 times [2021-06-05 05:15:56,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:56,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086954483] [2021-06-05 05:15:56,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:56,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:56,709 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:56,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:56,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086954483] [2021-06-05 05:15:56,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086954483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:56,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266413554] [2021-06-05 05:15:56,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:56,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:15:56,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:56,732 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:56,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:56,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:15:56,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:56,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:56,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:56,957 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:15:56,993 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:56,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266413554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:56,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:56,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 05:15:56,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985640015] [2021-06-05 05:15:56,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:15:56,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:56,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:15:56,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:15:56,994 INFO L87 Difference]: Start difference. First operand 1306 states and 3136 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:58,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:15:58,926 INFO L93 Difference]: Finished difference Result 2692 states and 6626 transitions. [2021-06-05 05:15:58,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:15:58,926 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 30 [2021-06-05 05:15:58,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:15:58,929 INFO L225 Difference]: With dead ends: 2692 [2021-06-05 05:15:58,929 INFO L226 Difference]: Without dead ends: 2675 [2021-06-05 05:15:58,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1439.4ms TimeCoverageRelationStatistics Valid=285, Invalid=1877, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:15:58,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2675 states. [2021-06-05 05:15:58,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2675 to 1306. [2021-06-05 05:15:58,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 2.403065134099617) internal successors, (3136), 1305 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:58,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 3136 transitions. [2021-06-05 05:15:58,943 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 3136 transitions. Word has length 30 [2021-06-05 05:15:58,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:15:58,943 INFO L482 AbstractCegarLoop]: Abstraction has 1306 states and 3136 transitions. [2021-06-05 05:15:58,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:15:58,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 3136 transitions. [2021-06-05 05:15:58,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:15:58,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:15:58,944 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:15:59,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:59,144 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:15:59,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:15:59,145 INFO L82 PathProgramCache]: Analyzing trace with hash 296541971, now seen corresponding path program 76 times [2021-06-05 05:15:59,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:15:59,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379695560] [2021-06-05 05:15:59,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:15:59,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:15:59,411 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:59,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:15:59,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379695560] [2021-06-05 05:15:59,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379695560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:59,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192414112] [2021-06-05 05:15:59,411 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 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:15:59,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:15:59,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:15:59,433 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:15:59,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:15:59,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:15:59,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:15:59,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:15:59,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:15:59,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:15:59,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:15:59,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192414112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:15:59,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:15:59,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 05:15:59,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392387289] [2021-06-05 05:15:59,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:15:59,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:15:59,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:15:59,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:15:59,725 INFO L87 Difference]: Start difference. First operand 1306 states and 3136 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:01,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:01,888 INFO L93 Difference]: Finished difference Result 2662 states and 6536 transitions. [2021-06-05 05:16:01,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:16:01,888 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) 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 30 [2021-06-05 05:16:01,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:01,891 INFO L225 Difference]: With dead ends: 2662 [2021-06-05 05:16:01,891 INFO L226 Difference]: Without dead ends: 2652 [2021-06-05 05:16:01,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1280.6ms TimeCoverageRelationStatistics Valid=256, Invalid=1906, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:16:01,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2021-06-05 05:16:01,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 1300. [2021-06-05 05:16:01,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1299 states have (on average 2.4033872209391838) internal successors, (3122), 1299 states have internal predecessors, (3122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:01,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 3122 transitions. [2021-06-05 05:16:01,904 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 3122 transitions. Word has length 30 [2021-06-05 05:16:01,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:01,904 INFO L482 AbstractCegarLoop]: Abstraction has 1300 states and 3122 transitions. [2021-06-05 05:16:01,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:01,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 3122 transitions. [2021-06-05 05:16:01,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:01,905 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:01,906 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:02,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable567,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:02,106 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:02,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:02,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1533189809, now seen corresponding path program 77 times [2021-06-05 05:16:02,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:02,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191247021] [2021-06-05 05:16:02,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:02,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:02,384 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:02,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:02,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191247021] [2021-06-05 05:16:02,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191247021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:02,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246396562] [2021-06-05 05:16:02,384 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 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:02,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:16:02,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:02,406 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:02,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:02,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:02,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 05:16:02,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:02,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:02,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:02,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-06-05 05:16:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:02,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246396562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:02,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:02,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:16:02,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834824913] [2021-06-05 05:16:02,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:16:02,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:02,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:16:02,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:16:02,680 INFO L87 Difference]: Start difference. First operand 1300 states and 3122 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:04,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:04,176 INFO L93 Difference]: Finished difference Result 2869 states and 7011 transitions. [2021-06-05 05:16:04,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:16:04,176 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:16:04,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:04,179 INFO L225 Difference]: With dead ends: 2869 [2021-06-05 05:16:04,179 INFO L226 Difference]: Without dead ends: 2852 [2021-06-05 05:16:04,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1266.1ms TimeCoverageRelationStatistics Valid=334, Invalid=1388, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:16:04,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2021-06-05 05:16:04,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 1318. [2021-06-05 05:16:04,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 2.4062262718299166) internal successors, (3169), 1317 states have internal predecessors, (3169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:04,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3169 transitions. [2021-06-05 05:16:04,194 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3169 transitions. Word has length 30 [2021-06-05 05:16:04,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:04,194 INFO L482 AbstractCegarLoop]: Abstraction has 1318 states and 3169 transitions. [2021-06-05 05:16:04,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:04,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3169 transitions. [2021-06-05 05:16:04,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:04,195 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:04,195 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:04,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-06-05 05:16:04,395 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:04,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:04,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1806861547, now seen corresponding path program 78 times [2021-06-05 05:16:04,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:04,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693005738] [2021-06-05 05:16:04,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:04,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:04,674 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:04,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:04,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693005738] [2021-06-05 05:16:04,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693005738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:04,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73524762] [2021-06-05 05:16:04,674 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 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:04,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:16:04,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:04,695 WARN L261 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:04,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:04,915 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 20 treesize of output 12 [2021-06-05 05:16:04,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:04,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:04,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:04,920 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:16:04,977 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:04,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73524762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:04,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:04,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:16:04,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864483092] [2021-06-05 05:16:04,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:16:04,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:04,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:16:04,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:16:04,978 INFO L87 Difference]: Start difference. First operand 1318 states and 3169 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:07,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:07,243 INFO L93 Difference]: Finished difference Result 3336 states and 8208 transitions. [2021-06-05 05:16:07,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:16:07,243 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:16:07,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:07,247 INFO L225 Difference]: With dead ends: 3336 [2021-06-05 05:16:07,247 INFO L226 Difference]: Without dead ends: 3323 [2021-06-05 05:16:07,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 1624.8ms TimeCoverageRelationStatistics Valid=448, Invalid=2002, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:16:07,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3323 states. [2021-06-05 05:16:07,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3323 to 1318. [2021-06-05 05:16:07,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 2.4062262718299166) internal successors, (3169), 1317 states have internal predecessors, (3169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:07,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3169 transitions. [2021-06-05 05:16:07,262 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3169 transitions. Word has length 30 [2021-06-05 05:16:07,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:07,263 INFO L482 AbstractCegarLoop]: Abstraction has 1318 states and 3169 transitions. [2021-06-05 05:16:07,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:07,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3169 transitions. [2021-06-05 05:16:07,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:07,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:07,264 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:07,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2021-06-05 05:16:07,464 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:07,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:07,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1822902581, now seen corresponding path program 79 times [2021-06-05 05:16:07,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:07,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742499842] [2021-06-05 05:16:07,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:07,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:07,734 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:07,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:07,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742499842] [2021-06-05 05:16:07,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742499842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:07,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373411049] [2021-06-05 05:16:07,734 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 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:07,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:07,755 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:07,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:07,963 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 20 treesize of output 12 [2021-06-05 05:16:07,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:07,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:07,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:07,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:16:08,003 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:08,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373411049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:08,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:08,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 05:16:08,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806419693] [2021-06-05 05:16:08,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:16:08,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:08,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:16:08,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:16:08,004 INFO L87 Difference]: Start difference. First operand 1318 states and 3169 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:09,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:09,853 INFO L93 Difference]: Finished difference Result 2853 states and 7009 transitions. [2021-06-05 05:16:09,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:16:09,853 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:16:09,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:09,856 INFO L225 Difference]: With dead ends: 2853 [2021-06-05 05:16:09,856 INFO L226 Difference]: Without dead ends: 2835 [2021-06-05 05:16:09,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1285.1ms TimeCoverageRelationStatistics Valid=277, Invalid=1529, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:16:09,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2021-06-05 05:16:09,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 1303. [2021-06-05 05:16:09,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1302 states have (on average 2.403225806451613) internal successors, (3129), 1302 states have internal predecessors, (3129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:09,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 3129 transitions. [2021-06-05 05:16:09,870 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 3129 transitions. Word has length 30 [2021-06-05 05:16:09,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:09,871 INFO L482 AbstractCegarLoop]: Abstraction has 1303 states and 3129 transitions. [2021-06-05 05:16:09,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:09,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 3129 transitions. [2021-06-05 05:16:09,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:09,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:09,872 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:10,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570,278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:10,072 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:10,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:10,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1221301505, now seen corresponding path program 80 times [2021-06-05 05:16:10,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:10,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216234980] [2021-06-05 05:16:10,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:10,320 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:10,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:10,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216234980] [2021-06-05 05:16:10,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216234980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:10,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496603452] [2021-06-05 05:16:10,321 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 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:10,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:16:10,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:10,341 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:10,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:10,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 05:16:10,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:10,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:10,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:10,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 05:16:10,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:10,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496603452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:10,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:10,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:16:10,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286304257] [2021-06-05 05:16:10,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:16:10,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:10,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:16:10,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:16:10,599 INFO L87 Difference]: Start difference. First operand 1303 states and 3129 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:11,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:11,997 INFO L93 Difference]: Finished difference Result 2717 states and 6653 transitions. [2021-06-05 05:16:11,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:16:11,997 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:16:11,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:12,000 INFO L225 Difference]: With dead ends: 2717 [2021-06-05 05:16:12,000 INFO L226 Difference]: Without dead ends: 2708 [2021-06-05 05:16:12,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 889.5ms TimeCoverageRelationStatistics Valid=232, Invalid=1100, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:16:12,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2708 states. [2021-06-05 05:16:12,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2708 to 1299. [2021-06-05 05:16:12,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 2.403697996918336) internal successors, (3120), 1298 states have internal predecessors, (3120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:12,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 3120 transitions. [2021-06-05 05:16:12,014 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 3120 transitions. Word has length 30 [2021-06-05 05:16:12,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:12,014 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 3120 transitions. [2021-06-05 05:16:12,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:12,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 3120 transitions. [2021-06-05 05:16:12,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:12,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:12,015 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:12,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:12,216 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:12,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:12,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1777200353, now seen corresponding path program 81 times [2021-06-05 05:16:12,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:12,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866229547] [2021-06-05 05:16:12,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:12,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:12,540 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:12,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:12,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866229547] [2021-06-05 05:16:12,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866229547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:12,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684537563] [2021-06-05 05:16:12,541 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 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:12,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:16:12,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:12,563 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:12,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:12,876 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:12,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 35 [2021-06-05 05:16:12,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 05:16:12,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:12,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:12,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:195 [2021-06-05 05:16:13,089 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2021-06-05 05:16:13,236 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-06-05 05:16:13,271 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:13,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684537563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:13,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:13,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-05 05:16:13,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314046117] [2021-06-05 05:16:13,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:16:13,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:13,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:16:13,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:16:13,272 INFO L87 Difference]: Start difference. First operand 1299 states and 3120 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:14,238 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-06-05 05:16:14,717 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-06-05 05:16:15,028 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-06-05 05:16:15,870 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-06-05 05:16:16,226 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-06-05 05:16:16,998 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-06-05 05:16:17,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:17,489 INFO L93 Difference]: Finished difference Result 2829 states and 6924 transitions. [2021-06-05 05:16:17,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 05:16:17,489 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:16:17,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:17,492 INFO L225 Difference]: With dead ends: 2829 [2021-06-05 05:16:17,492 INFO L226 Difference]: Without dead ends: 2814 [2021-06-05 05:16:17,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 3908.2ms TimeCoverageRelationStatistics Valid=737, Invalid=3955, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 05:16:17,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2814 states. [2021-06-05 05:16:17,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 1318. [2021-06-05 05:16:17,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 2.4039483675018984) internal successors, (3166), 1317 states have internal predecessors, (3166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:17,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 3166 transitions. [2021-06-05 05:16:17,506 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 3166 transitions. Word has length 30 [2021-06-05 05:16:17,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:17,506 INFO L482 AbstractCegarLoop]: Abstraction has 1318 states and 3166 transitions. [2021-06-05 05:16:17,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:17,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 3166 transitions. [2021-06-05 05:16:17,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:17,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:17,507 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:17,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:17,707 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:17,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:17,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1156713217, now seen corresponding path program 82 times [2021-06-05 05:16:17,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:17,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710828242] [2021-06-05 05:16:17,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:17,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:18,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:18,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710828242] [2021-06-05 05:16:18,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710828242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:18,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296224801] [2021-06-05 05:16:18,033 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 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:18,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:16:18,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:18,057 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:18,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:18,233 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 20 treesize of output 12 [2021-06-05 05:16:18,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:18,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:18,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:18,238 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:16:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:18,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296224801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:18,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:18,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:16:18,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663230398] [2021-06-05 05:16:18,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:16:18,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:18,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:16:18,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:16:18,307 INFO L87 Difference]: Start difference. First operand 1318 states and 3166 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:20,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:20,362 INFO L93 Difference]: Finished difference Result 3292 states and 8102 transitions. [2021-06-05 05:16:20,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:16:20,362 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:16:20,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:20,365 INFO L225 Difference]: With dead ends: 3292 [2021-06-05 05:16:20,365 INFO L226 Difference]: Without dead ends: 3277 [2021-06-05 05:16:20,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 1730.1ms TimeCoverageRelationStatistics Valid=513, Invalid=2243, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:16:20,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3277 states. [2021-06-05 05:16:20,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3277 to 1344. [2021-06-05 05:16:20,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 2.4065524944154877) internal successors, (3232), 1343 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:20,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 3232 transitions. [2021-06-05 05:16:20,381 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 3232 transitions. Word has length 30 [2021-06-05 05:16:20,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:20,381 INFO L482 AbstractCegarLoop]: Abstraction has 1344 states and 3232 transitions. [2021-06-05 05:16:20,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:20,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 3232 transitions. [2021-06-05 05:16:20,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:20,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:20,382 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:20,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-06-05 05:16:20,582 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:20,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:20,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1821916385, now seen corresponding path program 83 times [2021-06-05 05:16:20,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:20,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967284388] [2021-06-05 05:16:20,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:20,907 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:20,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:20,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967284388] [2021-06-05 05:16:20,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967284388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:20,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533075467] [2021-06-05 05:16:20,908 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 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:20,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:16:20,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:20,929 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:20,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:21,112 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 20 treesize of output 12 [2021-06-05 05:16:21,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:21,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:21,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:21,117 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:16:21,151 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:21,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533075467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:21,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:21,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 05:16:21,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142832202] [2021-06-05 05:16:21,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:16:21,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:21,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:16:21,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:16:21,152 INFO L87 Difference]: Start difference. First operand 1344 states and 3232 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:22,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:22,651 INFO L93 Difference]: Finished difference Result 2810 states and 6901 transitions. [2021-06-05 05:16:22,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:16:22,651 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:16:22,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:22,654 INFO L225 Difference]: With dead ends: 2810 [2021-06-05 05:16:22,654 INFO L226 Difference]: Without dead ends: 2791 [2021-06-05 05:16:22,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1142.7ms TimeCoverageRelationStatistics Valid=280, Invalid=1360, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:16:22,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2021-06-05 05:16:22,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 1335. [2021-06-05 05:16:22,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1334 states have (on average 2.4047976011994003) internal successors, (3208), 1334 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:22,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 3208 transitions. [2021-06-05 05:16:22,668 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 3208 transitions. Word has length 30 [2021-06-05 05:16:22,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:22,669 INFO L482 AbstractCegarLoop]: Abstraction has 1335 states and 3208 transitions. [2021-06-05 05:16:22,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:22,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 3208 transitions. [2021-06-05 05:16:22,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:22,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:22,670 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:22,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-06-05 05:16:22,870 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:22,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:22,870 INFO L82 PathProgramCache]: Analyzing trace with hash -2050721373, now seen corresponding path program 84 times [2021-06-05 05:16:22,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:22,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458351930] [2021-06-05 05:16:22,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:23,160 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:23,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:23,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458351930] [2021-06-05 05:16:23,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458351930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:23,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272219640] [2021-06-05 05:16:23,160 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 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:23,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:16:23,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:23,184 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:16:23,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:23,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:23,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:16:23,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:16:23,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:23,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:23,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:23,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:9 [2021-06-05 05:16:23,546 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:23,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272219640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:23,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:23,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:16:23,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667911850] [2021-06-05 05:16:23,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:16:23,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:23,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:16:23,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:16:23,546 INFO L87 Difference]: Start difference. First operand 1335 states and 3208 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:25,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:25,261 INFO L93 Difference]: Finished difference Result 2929 states and 7259 transitions. [2021-06-05 05:16:25,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:16:25,262 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 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 30 [2021-06-05 05:16:25,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:25,265 INFO L225 Difference]: With dead ends: 2929 [2021-06-05 05:16:25,265 INFO L226 Difference]: Without dead ends: 2920 [2021-06-05 05:16:25,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1416.5ms TimeCoverageRelationStatistics Valid=300, Invalid=1592, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:16:25,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2920 states. [2021-06-05 05:16:25,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2920 to 1338. [2021-06-05 05:16:25,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1337 states have (on average 2.404637247569185) internal successors, (3215), 1337 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:25,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 3215 transitions. [2021-06-05 05:16:25,286 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 3215 transitions. Word has length 30 [2021-06-05 05:16:25,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:25,286 INFO L482 AbstractCegarLoop]: Abstraction has 1338 states and 3215 transitions. [2021-06-05 05:16:25,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:25,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 3215 transitions. [2021-06-05 05:16:25,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:25,287 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:25,287 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:25,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable588 [2021-06-05 05:16:25,487 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:25,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:25,488 INFO L82 PathProgramCache]: Analyzing trace with hash -294320323, now seen corresponding path program 85 times [2021-06-05 05:16:25,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:25,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513560475] [2021-06-05 05:16:25,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:25,780 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:25,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:25,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513560475] [2021-06-05 05:16:25,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513560475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:25,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086662214] [2021-06-05 05:16:25,780 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 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:25,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:25,802 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:25,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:26,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:26,010 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 29 treesize of output 17 [2021-06-05 05:16:26,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:26,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:26,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:26,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-06-05 05:16:26,054 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:26,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086662214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:26,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:26,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 05:16:26,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630316725] [2021-06-05 05:16:26,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:16:26,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:26,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:16:26,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:16:26,055 INFO L87 Difference]: Start difference. First operand 1338 states and 3215 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:28,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:28,234 INFO L93 Difference]: Finished difference Result 2738 states and 6748 transitions. [2021-06-05 05:16:28,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:16:28,235 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 30 [2021-06-05 05:16:28,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:28,238 INFO L225 Difference]: With dead ends: 2738 [2021-06-05 05:16:28,238 INFO L226 Difference]: Without dead ends: 2724 [2021-06-05 05:16:28,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1367.0ms TimeCoverageRelationStatistics Valid=290, Invalid=1690, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:16:28,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2021-06-05 05:16:28,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 1348. [2021-06-05 05:16:28,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1347 states have (on average 2.406829992576095) internal successors, (3242), 1347 states have internal predecessors, (3242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:28,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 3242 transitions. [2021-06-05 05:16:28,258 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 3242 transitions. Word has length 30 [2021-06-05 05:16:28,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:28,258 INFO L482 AbstractCegarLoop]: Abstraction has 1348 states and 3242 transitions. [2021-06-05 05:16:28,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:28,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 3242 transitions. [2021-06-05 05:16:28,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:28,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:28,259 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:28,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable589,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:28,460 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:28,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:28,460 INFO L82 PathProgramCache]: Analyzing trace with hash 241123885, now seen corresponding path program 86 times [2021-06-05 05:16:28,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:28,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833470880] [2021-06-05 05:16:28,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:28,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:28,766 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:28,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:28,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833470880] [2021-06-05 05:16:28,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833470880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:28,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074509896] [2021-06-05 05:16:28,767 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 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:28,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:16:28,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:28,791 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:28,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:29,046 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 20 treesize of output 12 [2021-06-05 05:16:29,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:29,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:29,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:29,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 05:16:29,085 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:29,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074509896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:29,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:29,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 05:16:29,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85596000] [2021-06-05 05:16:29,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:16:29,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:29,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:16:29,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:16:29,086 INFO L87 Difference]: Start difference. First operand 1348 states and 3242 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:31,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:31,605 INFO L93 Difference]: Finished difference Result 2725 states and 6702 transitions. [2021-06-05 05:16:31,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:16:31,605 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) 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 30 [2021-06-05 05:16:31,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:31,608 INFO L225 Difference]: With dead ends: 2725 [2021-06-05 05:16:31,608 INFO L226 Difference]: Without dead ends: 2715 [2021-06-05 05:16:31,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1427.2ms TimeCoverageRelationStatistics Valid=270, Invalid=1892, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:16:31,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2715 states. [2021-06-05 05:16:31,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2715 to 1348. [2021-06-05 05:16:31,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1347 states have (on average 2.406829992576095) internal successors, (3242), 1347 states have internal predecessors, (3242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:31,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 3242 transitions. [2021-06-05 05:16:31,622 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 3242 transitions. Word has length 30 [2021-06-05 05:16:31,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:31,622 INFO L482 AbstractCegarLoop]: Abstraction has 1348 states and 3242 transitions. [2021-06-05 05:16:31,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:31,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 3242 transitions. [2021-06-05 05:16:31,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:31,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:31,624 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:31,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable590 [2021-06-05 05:16:31,824 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:31,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:31,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1741846337, now seen corresponding path program 87 times [2021-06-05 05:16:31,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:31,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247192289] [2021-06-05 05:16:31,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:31,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:32,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:32,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247192289] [2021-06-05 05:16:32,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247192289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:32,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068841789] [2021-06-05 05:16:32,126 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 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:32,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:16:32,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:32,148 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 05:16:32,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:32,416 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:32,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:16:32,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:32,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:32,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:32,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 05:16:32,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:32,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068841789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:32,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:32,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 26 [2021-06-05 05:16:32,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774098287] [2021-06-05 05:16:32,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:16:32,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:32,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:16:32,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:16:32,624 INFO L87 Difference]: Start difference. First operand 1348 states and 3242 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:36,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:36,356 INFO L93 Difference]: Finished difference Result 3393 states and 8421 transitions. [2021-06-05 05:16:36,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:16:36,356 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:16:36,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:36,360 INFO L225 Difference]: With dead ends: 3393 [2021-06-05 05:16:36,360 INFO L226 Difference]: Without dead ends: 3382 [2021-06-05 05:16:36,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 2787.1ms TimeCoverageRelationStatistics Valid=588, Invalid=3444, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:16:36,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3382 states. [2021-06-05 05:16:36,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3382 to 1352. [2021-06-05 05:16:36,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 2.4078460399703925) internal successors, (3253), 1351 states have internal predecessors, (3253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:36,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 3253 transitions. [2021-06-05 05:16:36,376 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 3253 transitions. Word has length 30 [2021-06-05 05:16:36,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:36,376 INFO L482 AbstractCegarLoop]: Abstraction has 1352 states and 3253 transitions. [2021-06-05 05:16:36,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:36,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 3253 transitions. [2021-06-05 05:16:36,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:36,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:36,377 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:36,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:36,578 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:36,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:36,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1136219495, now seen corresponding path program 88 times [2021-06-05 05:16:36,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:36,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467603113] [2021-06-05 05:16:36,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:36,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:36,885 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:36,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:36,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467603113] [2021-06-05 05:16:36,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467603113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:36,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353981073] [2021-06-05 05:16:36,886 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 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:36,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:16:36,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:36,907 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:36,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:37,125 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 20 treesize of output 12 [2021-06-05 05:16:37,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:37,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:37,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:37,130 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:16:37,186 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:37,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353981073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:37,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:37,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 05:16:37,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522660042] [2021-06-05 05:16:37,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:16:37,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:37,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:16:37,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:16:37,187 INFO L87 Difference]: Start difference. First operand 1352 states and 3253 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:40,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:40,526 INFO L93 Difference]: Finished difference Result 3430 states and 8470 transitions. [2021-06-05 05:16:40,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:16:40,526 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:16:40,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:40,529 INFO L225 Difference]: With dead ends: 3430 [2021-06-05 05:16:40,529 INFO L226 Difference]: Without dead ends: 3413 [2021-06-05 05:16:40,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 2709.4ms TimeCoverageRelationStatistics Valid=727, Invalid=3305, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:16:40,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3413 states. [2021-06-05 05:16:40,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3413 to 1332. [2021-06-05 05:16:40,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1331 states have (on average 2.4049586776859506) internal successors, (3201), 1331 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:40,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 3201 transitions. [2021-06-05 05:16:40,545 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 3201 transitions. Word has length 30 [2021-06-05 05:16:40,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:40,545 INFO L482 AbstractCegarLoop]: Abstraction has 1332 states and 3201 transitions. [2021-06-05 05:16:40,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:40,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 3201 transitions. [2021-06-05 05:16:40,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:40,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:40,546 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:40,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-06-05 05:16:40,746 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:40,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:40,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1703814393, now seen corresponding path program 89 times [2021-06-05 05:16:40,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:40,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260141716] [2021-06-05 05:16:40,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:40,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:41,024 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:41,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:41,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260141716] [2021-06-05 05:16:41,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260141716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:41,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993977728] [2021-06-05 05:16:41,024 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 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:41,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:16:41,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:41,047 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:41,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:41,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:16:41,259 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 29 treesize of output 17 [2021-06-05 05:16:41,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:41,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:41,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:41,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-06-05 05:16:41,301 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:41,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993977728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:41,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:41,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 05:16:41,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125465363] [2021-06-05 05:16:41,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:16:41,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:41,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:16:41,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:16:41,302 INFO L87 Difference]: Start difference. First operand 1332 states and 3201 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:44,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:44,420 INFO L93 Difference]: Finished difference Result 3258 states and 8054 transitions. [2021-06-05 05:16:44,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:16:44,420 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 30 [2021-06-05 05:16:44,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:44,423 INFO L225 Difference]: With dead ends: 3258 [2021-06-05 05:16:44,423 INFO L226 Difference]: Without dead ends: 3245 [2021-06-05 05:16:44,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 2361.5ms TimeCoverageRelationStatistics Valid=527, Invalid=2895, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:16:44,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3245 states. [2021-06-05 05:16:44,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3245 to 1344. [2021-06-05 05:16:44,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 2.4065524944154877) internal successors, (3232), 1343 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:44,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 3232 transitions. [2021-06-05 05:16:44,439 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 3232 transitions. Word has length 30 [2021-06-05 05:16:44,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:44,439 INFO L482 AbstractCegarLoop]: Abstraction has 1344 states and 3232 transitions. [2021-06-05 05:16:44,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:44,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 3232 transitions. [2021-06-05 05:16:44,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:44,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:44,440 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:44,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-05 05:16:44,641 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:44,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:44,641 INFO L82 PathProgramCache]: Analyzing trace with hash -834751853, now seen corresponding path program 90 times [2021-06-05 05:16:44,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:44,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546789038] [2021-06-05 05:16:44,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:44,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:44,914 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:44,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:44,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546789038] [2021-06-05 05:16:44,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546789038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:44,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56500270] [2021-06-05 05:16:44,914 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 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:44,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:16:44,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:44,937 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:44,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:45,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:16:45,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:45,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:45,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:45,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:16:45,187 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:45,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56500270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:45,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:45,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 05:16:45,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703807596] [2021-06-05 05:16:45,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:16:45,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:45,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:16:45,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:16:45,188 INFO L87 Difference]: Start difference. First operand 1344 states and 3232 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:47,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:47,905 INFO L93 Difference]: Finished difference Result 2863 states and 7051 transitions. [2021-06-05 05:16:47,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:16:47,906 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 30 [2021-06-05 05:16:47,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:47,908 INFO L225 Difference]: With dead ends: 2863 [2021-06-05 05:16:47,908 INFO L226 Difference]: Without dead ends: 2846 [2021-06-05 05:16:47,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 2038.3ms TimeCoverageRelationStatistics Valid=449, Invalid=2413, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:16:47,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2021-06-05 05:16:47,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 1344. [2021-06-05 05:16:47,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 2.4065524944154877) internal successors, (3232), 1343 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:47,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 3232 transitions. [2021-06-05 05:16:47,923 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 3232 transitions. Word has length 30 [2021-06-05 05:16:47,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:47,923 INFO L482 AbstractCegarLoop]: Abstraction has 1344 states and 3232 transitions. [2021-06-05 05:16:47,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:47,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 3232 transitions. [2021-06-05 05:16:47,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:47,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:47,925 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:48,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable599,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:48,125 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:48,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:48,125 INFO L82 PathProgramCache]: Analyzing trace with hash -299307645, now seen corresponding path program 91 times [2021-06-05 05:16:48,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:48,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477513944] [2021-06-05 05:16:48,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:48,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:48,393 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:48,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:48,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477513944] [2021-06-05 05:16:48,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477513944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:48,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893605754] [2021-06-05 05:16:48,394 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 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:48,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:48,416 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:48,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:48,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:16:48,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:48,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:48,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:48,662 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:16:48,698 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:48,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893605754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:48,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:48,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 05:16:48,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106642898] [2021-06-05 05:16:48,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:16:48,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:48,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:16:48,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:16:48,699 INFO L87 Difference]: Start difference. First operand 1344 states and 3232 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:51,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:51,588 INFO L93 Difference]: Finished difference Result 2773 states and 6815 transitions. [2021-06-05 05:16:51,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:16:51,588 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) 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 30 [2021-06-05 05:16:51,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:51,591 INFO L225 Difference]: With dead ends: 2773 [2021-06-05 05:16:51,591 INFO L226 Difference]: Without dead ends: 2763 [2021-06-05 05:16:51,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 2091.1ms TimeCoverageRelationStatistics Valid=408, Invalid=2562, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:16:51,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2763 states. [2021-06-05 05:16:51,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2763 to 1341. [2021-06-05 05:16:51,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 2.406716417910448) internal successors, (3225), 1340 states have internal predecessors, (3225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:51,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 3225 transitions. [2021-06-05 05:16:51,605 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 3225 transitions. Word has length 30 [2021-06-05 05:16:51,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:51,605 INFO L482 AbstractCegarLoop]: Abstraction has 1341 states and 3225 transitions. [2021-06-05 05:16:51,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:51,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 3225 transitions. [2021-06-05 05:16:51,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:51,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:51,606 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:51,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable600 [2021-06-05 05:16:51,807 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:51,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:51,807 INFO L82 PathProgramCache]: Analyzing trace with hash 105438493, now seen corresponding path program 92 times [2021-06-05 05:16:51,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:51,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583772736] [2021-06-05 05:16:51,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:52,073 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:52,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:52,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583772736] [2021-06-05 05:16:52,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583772736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:52,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030092512] [2021-06-05 05:16:52,073 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 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:52,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:16:52,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:52,095 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:16:52,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:52,365 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 20 treesize of output 12 [2021-06-05 05:16:52,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:52,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:52,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:52,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:16:52,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:52,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030092512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:52,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:52,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 05:16:52,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354451638] [2021-06-05 05:16:52,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:16:52,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:52,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:16:52,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:16:52,407 INFO L87 Difference]: Start difference. First operand 1341 states and 3225 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:54,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:16:54,717 INFO L93 Difference]: Finished difference Result 2759 states and 6787 transitions. [2021-06-05 05:16:54,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:16:54,717 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) 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 30 [2021-06-05 05:16:54,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:16:54,720 INFO L225 Difference]: With dead ends: 2759 [2021-06-05 05:16:54,720 INFO L226 Difference]: Without dead ends: 2749 [2021-06-05 05:16:54,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1483.8ms TimeCoverageRelationStatistics Valid=280, Invalid=1976, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:16:54,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2749 states. [2021-06-05 05:16:54,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2749 to 1331. [2021-06-05 05:16:54,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 1330 states have (on average 2.405263157894737) internal successors, (3199), 1330 states have internal predecessors, (3199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:54,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 3199 transitions. [2021-06-05 05:16:54,736 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 3199 transitions. Word has length 30 [2021-06-05 05:16:54,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:16:54,736 INFO L482 AbstractCegarLoop]: Abstraction has 1331 states and 3199 transitions. [2021-06-05 05:16:54,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:54,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 3199 transitions. [2021-06-05 05:16:54,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:16:54,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:16:54,737 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:16:54,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable601,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:54,937 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:16:54,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:16:54,938 INFO L82 PathProgramCache]: Analyzing trace with hash -466473999, now seen corresponding path program 93 times [2021-06-05 05:16:54,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:16:54,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264240289] [2021-06-05 05:16:54,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:16:54,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:16:55,247 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:55,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:16:55,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264240289] [2021-06-05 05:16:55,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264240289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:55,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995674154] [2021-06-05 05:16:55,247 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 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:16:55,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:16:55,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:16:55,270 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:16:55,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:16:55,549 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:55,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 05:16:55,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:16:55,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:16:55,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:16:55,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:95 [2021-06-05 05:16:55,843 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-06-05 05:16:56,057 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-06-05 05:16:56,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:16:56,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995674154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:16:56,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:16:56,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-05 05:16:56,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962993339] [2021-06-05 05:16:56,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:16:56,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:16:56,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:16:56,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:16:56,092 INFO L87 Difference]: Start difference. First operand 1331 states and 3199 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:16:56,411 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-06-05 05:16:57,101 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-06-05 05:16:57,755 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 45 [2021-06-05 05:16:58,315 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-06-05 05:16:58,742 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-06-05 05:16:58,943 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 42 [2021-06-05 05:16:59,096 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2021-06-05 05:16:59,308 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 37 [2021-06-05 05:16:59,671 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 34 [2021-06-05 05:17:00,874 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-06-05 05:17:02,498 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-06-05 05:17:02,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:02,555 INFO L93 Difference]: Finished difference Result 3387 states and 8320 transitions. [2021-06-05 05:17:02,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 05:17:02,555 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:02,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:02,558 INFO L225 Difference]: With dead ends: 3387 [2021-06-05 05:17:02,558 INFO L226 Difference]: Without dead ends: 3372 [2021-06-05 05:17:02,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2154 ImplicationChecksByTransitivity, 5980.5ms TimeCoverageRelationStatistics Valid=1115, Invalid=5365, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 05:17:02,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3372 states. [2021-06-05 05:17:02,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3372 to 1349. [2021-06-05 05:17:02,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 2.408753709198813) internal successors, (3247), 1348 states have internal predecessors, (3247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:02,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 3247 transitions. [2021-06-05 05:17:02,574 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 3247 transitions. Word has length 30 [2021-06-05 05:17:02,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:02,574 INFO L482 AbstractCegarLoop]: Abstraction has 1349 states and 3247 transitions. [2021-06-05 05:17:02,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:02,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 3247 transitions. [2021-06-05 05:17:02,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:02,575 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:02,575 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:02,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable602 [2021-06-05 05:17:02,775 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:02,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:02,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1557671881, now seen corresponding path program 94 times [2021-06-05 05:17:02,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:02,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139835849] [2021-06-05 05:17:02,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:02,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:03,086 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:03,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:03,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139835849] [2021-06-05 05:17:03,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139835849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:03,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076244074] [2021-06-05 05:17:03,086 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 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:03,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:17:03,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:03,107 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:03,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:03,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:17:03,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:03,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:03,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:03,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:17:03,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:03,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076244074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:03,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:03,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 05:17:03,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628710526] [2021-06-05 05:17:03,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:17:03,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:03,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:17:03,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:17:03,364 INFO L87 Difference]: Start difference. First operand 1349 states and 3247 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:05,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:05,227 INFO L93 Difference]: Finished difference Result 3105 states and 7675 transitions. [2021-06-05 05:17:05,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:17:05,227 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:05,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:05,230 INFO L225 Difference]: With dead ends: 3105 [2021-06-05 05:17:05,231 INFO L226 Difference]: Without dead ends: 3092 [2021-06-05 05:17:05,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1349.4ms TimeCoverageRelationStatistics Valid=345, Invalid=1547, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:17:05,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3092 states. [2021-06-05 05:17:05,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3092 to 1362. [2021-06-05 05:17:05,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1361 states have (on average 2.4099926524614252) internal successors, (3280), 1361 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:05,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 3280 transitions. [2021-06-05 05:17:05,252 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 3280 transitions. Word has length 30 [2021-06-05 05:17:05,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:05,252 INFO L482 AbstractCegarLoop]: Abstraction has 1362 states and 3280 transitions. [2021-06-05 05:17:05,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:05,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 3280 transitions. [2021-06-05 05:17:05,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:05,253 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:05,253 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:05,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable613,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:05,453 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:05,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:05,453 INFO L82 PathProgramCache]: Analyzing trace with hash 198729169, now seen corresponding path program 95 times [2021-06-05 05:17:05,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:05,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137010236] [2021-06-05 05:17:05,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:05,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:05,752 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:05,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:05,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137010236] [2021-06-05 05:17:05,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137010236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:05,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055777523] [2021-06-05 05:17:05,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:05,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:17:05,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:05,774 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:05,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:05,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:05,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:17:05,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:06,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:06,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:06,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-06-05 05:17:06,037 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:06,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055777523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:06,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:06,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 05:17:06,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329244140] [2021-06-05 05:17:06,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:17:06,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:06,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:17:06,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:17:06,038 INFO L87 Difference]: Start difference. First operand 1362 states and 3280 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:07,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:07,737 INFO L93 Difference]: Finished difference Result 2817 states and 6924 transitions. [2021-06-05 05:17:07,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:17:07,737 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:07,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:07,740 INFO L225 Difference]: With dead ends: 2817 [2021-06-05 05:17:07,740 INFO L226 Difference]: Without dead ends: 2799 [2021-06-05 05:17:07,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1252.8ms TimeCoverageRelationStatistics Valid=283, Invalid=1439, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:17:07,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2799 states. [2021-06-05 05:17:07,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2799 to 1347. [2021-06-05 05:17:07,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1347 states, 1346 states have (on average 2.4071322436849925) internal successors, (3240), 1346 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:07,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1347 states to 1347 states and 3240 transitions. [2021-06-05 05:17:07,755 INFO L78 Accepts]: Start accepts. Automaton has 1347 states and 3240 transitions. Word has length 30 [2021-06-05 05:17:07,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:07,755 INFO L482 AbstractCegarLoop]: Abstraction has 1347 states and 3240 transitions. [2021-06-05 05:17:07,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:07,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1347 states and 3240 transitions. [2021-06-05 05:17:07,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:07,756 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:07,756 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:07,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable614,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:07,957 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:07,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:07,957 INFO L82 PathProgramCache]: Analyzing trace with hash 621058707, now seen corresponding path program 96 times [2021-06-05 05:17:07,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:07,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669234344] [2021-06-05 05:17:07,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:07,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:08,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:08,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669234344] [2021-06-05 05:17:08,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669234344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:08,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8789566] [2021-06-05 05:17:08,222 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 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:08,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:17:08,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:08,243 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:17:08,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:08,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:08,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:08,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:17:08,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-06-05 05:17:08,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:08,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:08,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:08,585 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:11 [2021-06-05 05:17:08,620 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:08,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8789566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:08,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:08,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:17:08,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699801691] [2021-06-05 05:17:08,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:17:08,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:08,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:17:08,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:17:08,621 INFO L87 Difference]: Start difference. First operand 1347 states and 3240 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:10,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:10,091 INFO L93 Difference]: Finished difference Result 2930 states and 7263 transitions. [2021-06-05 05:17:10,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:17:10,091 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 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 30 [2021-06-05 05:17:10,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:10,094 INFO L225 Difference]: With dead ends: 2930 [2021-06-05 05:17:10,094 INFO L226 Difference]: Without dead ends: 2921 [2021-06-05 05:17:10,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1196.4ms TimeCoverageRelationStatistics Valid=287, Invalid=1519, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:17:10,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-06-05 05:17:10,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 1350. [2021-06-05 05:17:10,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 2.406968124536694) internal successors, (3247), 1349 states have internal predecessors, (3247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:10,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 3247 transitions. [2021-06-05 05:17:10,109 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 3247 transitions. Word has length 30 [2021-06-05 05:17:10,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:10,109 INFO L482 AbstractCegarLoop]: Abstraction has 1350 states and 3247 transitions. [2021-06-05 05:17:10,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:10,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 3247 transitions. [2021-06-05 05:17:10,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:10,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:10,110 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:10,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable615,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:10,311 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:10,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:10,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1917507539, now seen corresponding path program 97 times [2021-06-05 05:17:10,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:10,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254579200] [2021-06-05 05:17:10,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:10,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:10,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:10,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:10,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254579200] [2021-06-05 05:17:10,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254579200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:10,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364467840] [2021-06-05 05:17:10,576 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 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:10,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:10,596 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:10,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:10,786 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 20 treesize of output 12 [2021-06-05 05:17:10,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:10,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:10,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:10,791 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:17:10,827 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:10,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364467840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:10,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:10,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 05:17:10,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869671210] [2021-06-05 05:17:10,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:17:10,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:10,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:17:10,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:17:10,828 INFO L87 Difference]: Start difference. First operand 1350 states and 3247 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:12,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:12,853 INFO L93 Difference]: Finished difference Result 2754 states and 6789 transitions. [2021-06-05 05:17:12,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:17:12,853 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 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 30 [2021-06-05 05:17:12,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:12,856 INFO L225 Difference]: With dead ends: 2754 [2021-06-05 05:17:12,856 INFO L226 Difference]: Without dead ends: 2740 [2021-06-05 05:17:12,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 1274.1ms TimeCoverageRelationStatistics Valid=289, Invalid=1781, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:17:12,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2740 states. [2021-06-05 05:17:12,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2740 to 1360. [2021-06-05 05:17:12,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1359 states have (on average 2.4091243561442237) internal successors, (3274), 1359 states have internal predecessors, (3274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:12,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 3274 transitions. [2021-06-05 05:17:12,871 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 3274 transitions. Word has length 30 [2021-06-05 05:17:12,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:12,871 INFO L482 AbstractCegarLoop]: Abstraction has 1360 states and 3274 transitions. [2021-06-05 05:17:12,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:12,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 3274 transitions. [2021-06-05 05:17:12,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:12,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:12,872 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:13,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable616,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:13,072 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:13,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:13,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1382063331, now seen corresponding path program 98 times [2021-06-05 05:17:13,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:13,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160240988] [2021-06-05 05:17:13,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:13,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:13,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:13,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:13,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160240988] [2021-06-05 05:17:13,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160240988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:13,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945820353] [2021-06-05 05:17:13,347 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 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:13,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:17:13,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:13,368 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:13,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:13,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 05:17:13,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:13,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:13,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:13,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 05:17:13,662 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:13,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945820353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:13,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:13,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 05:17:13,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202040595] [2021-06-05 05:17:13,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:17:13,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:13,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:17:13,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:17:13,663 INFO L87 Difference]: Start difference. First operand 1360 states and 3274 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:16,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:16,172 INFO L93 Difference]: Finished difference Result 2734 states and 6722 transitions. [2021-06-05 05:17:16,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:17:16,172 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) 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 30 [2021-06-05 05:17:16,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:16,175 INFO L225 Difference]: With dead ends: 2734 [2021-06-05 05:17:16,175 INFO L226 Difference]: Without dead ends: 2724 [2021-06-05 05:17:16,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1351.2ms TimeCoverageRelationStatistics Valid=276, Invalid=1980, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:17:16,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2021-06-05 05:17:16,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 1360. [2021-06-05 05:17:16,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1359 states have (on average 2.4091243561442237) internal successors, (3274), 1359 states have internal predecessors, (3274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:16,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 3274 transitions. [2021-06-05 05:17:16,190 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 3274 transitions. Word has length 30 [2021-06-05 05:17:16,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:16,190 INFO L482 AbstractCegarLoop]: Abstraction has 1360 states and 3274 transitions. [2021-06-05 05:17:16,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:16,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 3274 transitions. [2021-06-05 05:17:16,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:16,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:16,191 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:16,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable617 [2021-06-05 05:17:16,392 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:16,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:16,392 INFO L82 PathProgramCache]: Analyzing trace with hash 929933743, now seen corresponding path program 99 times [2021-06-05 05:17:16,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:16,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943700210] [2021-06-05 05:17:16,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:16,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:16,674 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:16,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:16,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943700210] [2021-06-05 05:17:16,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943700210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:16,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661415688] [2021-06-05 05:17:16,675 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 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:16,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:17:16,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:16,699 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 05:17:16,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:16,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:16,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 05:17:16,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:16,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:16,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:16,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 05:17:17,185 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:17,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661415688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:17,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:17,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 26 [2021-06-05 05:17:17,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625217630] [2021-06-05 05:17:17,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:17:17,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:17,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:17:17,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:17:17,186 INFO L87 Difference]: Start difference. First operand 1360 states and 3274 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:20,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:20,208 INFO L93 Difference]: Finished difference Result 3408 states and 8465 transitions. [2021-06-05 05:17:20,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:17:20,208 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:20,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:20,211 INFO L225 Difference]: With dead ends: 3408 [2021-06-05 05:17:20,211 INFO L226 Difference]: Without dead ends: 3397 [2021-06-05 05:17:20,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 2498.4ms TimeCoverageRelationStatistics Valid=545, Invalid=3237, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:17:20,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3397 states. [2021-06-05 05:17:20,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3397 to 1364. [2021-06-05 05:17:20,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1364 states, 1363 states have (on average 2.410124724871607) internal successors, (3285), 1363 states have internal predecessors, (3285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:20,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 3285 transitions. [2021-06-05 05:17:20,228 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 3285 transitions. Word has length 30 [2021-06-05 05:17:20,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:20,228 INFO L482 AbstractCegarLoop]: Abstraction has 1364 states and 3285 transitions. [2021-06-05 05:17:20,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:20,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 3285 transitions. [2021-06-05 05:17:20,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:20,229 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:20,229 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:20,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:20,429 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:20,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:20,430 INFO L82 PathProgramCache]: Analyzing trace with hash -486967721, now seen corresponding path program 100 times [2021-06-05 05:17:20,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:20,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236597045] [2021-06-05 05:17:20,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:20,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:20,701 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:20,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:20,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236597045] [2021-06-05 05:17:20,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236597045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:20,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905550630] [2021-06-05 05:17:20,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:20,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:17:20,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:20,723 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:20,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:20,931 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 20 treesize of output 12 [2021-06-05 05:17:20,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:20,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:20,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:20,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:17:20,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:20,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905550630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:20,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:20,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 05:17:20,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438129796] [2021-06-05 05:17:20,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:17:20,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:20,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:17:20,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:17:20,990 INFO L87 Difference]: Start difference. First operand 1364 states and 3285 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:24,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:24,145 INFO L93 Difference]: Finished difference Result 3476 states and 8584 transitions. [2021-06-05 05:17:24,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 05:17:24,145 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:24,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:24,149 INFO L225 Difference]: With dead ends: 3476 [2021-06-05 05:17:24,149 INFO L226 Difference]: Without dead ends: 3459 [2021-06-05 05:17:24,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 2479.4ms TimeCoverageRelationStatistics Valid=729, Invalid=3303, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:17:24,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3459 states. [2021-06-05 05:17:24,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3459 to 1342. [2021-06-05 05:17:24,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1341 states have (on average 2.407158836689038) internal successors, (3228), 1341 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:24,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 3228 transitions. [2021-06-05 05:17:24,182 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 3228 transitions. Word has length 30 [2021-06-05 05:17:24,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:24,182 INFO L482 AbstractCegarLoop]: Abstraction has 1342 states and 3228 transitions. [2021-06-05 05:17:24,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:24,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 3228 transitions. [2021-06-05 05:17:24,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:24,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:24,183 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:24,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable624,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:24,384 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:24,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:24,384 INFO L82 PathProgramCache]: Analyzing trace with hash 827138373, now seen corresponding path program 101 times [2021-06-05 05:17:24,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:24,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056699007] [2021-06-05 05:17:24,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:24,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:24,681 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:24,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:24,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056699007] [2021-06-05 05:17:24,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056699007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:24,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223434835] [2021-06-05 05:17:24,681 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 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:24,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:17:24,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:24,703 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:24,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:24,944 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 19 treesize of output 11 [2021-06-05 05:17:24,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:24,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:24,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:24,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 05:17:24,978 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:24,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223434835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:24,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:24,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:17:24,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641456367] [2021-06-05 05:17:24,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:17:24,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:24,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:17:24,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:17:24,979 INFO L87 Difference]: Start difference. First operand 1342 states and 3228 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:26,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:26,498 INFO L93 Difference]: Finished difference Result 2761 states and 6769 transitions. [2021-06-05 05:17:26,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:17:26,498 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:26,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:26,501 INFO L225 Difference]: With dead ends: 2761 [2021-06-05 05:17:26,501 INFO L226 Difference]: Without dead ends: 2743 [2021-06-05 05:17:26,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1241.1ms TimeCoverageRelationStatistics Valid=337, Invalid=1303, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:17:26,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2743 states. [2021-06-05 05:17:26,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2743 to 1341. [2021-06-05 05:17:26,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 2.4074626865671642) internal successors, (3226), 1340 states have internal predecessors, (3226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:26,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 3226 transitions. [2021-06-05 05:17:26,515 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 3226 transitions. Word has length 30 [2021-06-05 05:17:26,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:26,515 INFO L482 AbstractCegarLoop]: Abstraction has 1341 states and 3226 transitions. [2021-06-05 05:17:26,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:26,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 3226 transitions. [2021-06-05 05:17:26,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:26,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:26,517 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:26,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable625 [2021-06-05 05:17:26,717 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:26,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:26,717 INFO L82 PathProgramCache]: Analyzing trace with hash -145415493, now seen corresponding path program 102 times [2021-06-05 05:17:26,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:26,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648003498] [2021-06-05 05:17:26,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:26,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:26,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:26,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648003498] [2021-06-05 05:17:26,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648003498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:26,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574890402] [2021-06-05 05:17:26,992 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 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:27,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:17:27,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:27,015 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:27,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:27,238 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 19 treesize of output 11 [2021-06-05 05:17:27,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:27,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:27,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:27,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 05:17:27,273 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:27,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574890402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:27,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:27,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:17:27,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896694150] [2021-06-05 05:17:27,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:17:27,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:27,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:17:27,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:17:27,274 INFO L87 Difference]: Start difference. First operand 1341 states and 3226 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:29,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:29,057 INFO L93 Difference]: Finished difference Result 2916 states and 7128 transitions. [2021-06-05 05:17:29,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:17:29,058 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:29,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:29,060 INFO L225 Difference]: With dead ends: 2916 [2021-06-05 05:17:29,060 INFO L226 Difference]: Without dead ends: 2899 [2021-06-05 05:17:29,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1230.8ms TimeCoverageRelationStatistics Valid=345, Invalid=1377, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:17:29,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2899 states. [2021-06-05 05:17:29,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2899 to 1359. [2021-06-05 05:17:29,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1358 states have (on average 2.409425625920471) internal successors, (3272), 1358 states have internal predecessors, (3272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:29,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 3272 transitions. [2021-06-05 05:17:29,075 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 3272 transitions. Word has length 30 [2021-06-05 05:17:29,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:29,075 INFO L482 AbstractCegarLoop]: Abstraction has 1359 states and 3272 transitions. [2021-06-05 05:17:29,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:29,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 3272 transitions. [2021-06-05 05:17:29,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:29,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:29,076 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:29,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:29,276 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:29,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:29,277 INFO L82 PathProgramCache]: Analyzing trace with hash -962941637, now seen corresponding path program 103 times [2021-06-05 05:17:29,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:29,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297245506] [2021-06-05 05:17:29,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:29,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:29,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:29,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:29,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297245506] [2021-06-05 05:17:29,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297245506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:29,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268210285] [2021-06-05 05:17:29,550 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 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:29,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:29,571 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:29,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:29,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:29,783 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 29 treesize of output 17 [2021-06-05 05:17:29,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:29,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:29,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:29,788 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-06-05 05:17:29,829 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:29,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268210285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:29,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:29,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 05:17:29,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197875139] [2021-06-05 05:17:29,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:17:29,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:29,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:17:29,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:17:29,830 INFO L87 Difference]: Start difference. First operand 1359 states and 3272 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:31,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:31,509 INFO L93 Difference]: Finished difference Result 3139 states and 7742 transitions. [2021-06-05 05:17:31,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:17:31,509 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:31,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:31,512 INFO L225 Difference]: With dead ends: 3139 [2021-06-05 05:17:31,513 INFO L226 Difference]: Without dead ends: 3126 [2021-06-05 05:17:31,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1292.2ms TimeCoverageRelationStatistics Valid=333, Invalid=1473, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:17:31,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-06-05 05:17:31,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 1340. [2021-06-05 05:17:31,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1339 states have (on average 2.4070201643017177) internal successors, (3223), 1339 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:31,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 3223 transitions. [2021-06-05 05:17:31,528 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 3223 transitions. Word has length 30 [2021-06-05 05:17:31,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:31,528 INFO L482 AbstractCegarLoop]: Abstraction has 1340 states and 3223 transitions. [2021-06-05 05:17:31,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:31,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 3223 transitions. [2021-06-05 05:17:31,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:31,530 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:31,530 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:31,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable627,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:31,730 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:31,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:31,730 INFO L82 PathProgramCache]: Analyzing trace with hash 793459413, now seen corresponding path program 104 times [2021-06-05 05:17:31,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:31,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519833605] [2021-06-05 05:17:31,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:31,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:32,005 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:32,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:32,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519833605] [2021-06-05 05:17:32,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519833605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:32,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327335584] [2021-06-05 05:17:32,006 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 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:32,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:17:32,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:32,027 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:32,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:32,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:32,262 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 29 treesize of output 17 [2021-06-05 05:17:32,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:32,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:32,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:32,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-06-05 05:17:32,304 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:32,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327335584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:32,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:32,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 05:17:32,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323025181] [2021-06-05 05:17:32,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:17:32,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:32,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:17:32,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:17:32,305 INFO L87 Difference]: Start difference. First operand 1340 states and 3223 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:33,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:33,876 INFO L93 Difference]: Finished difference Result 2878 states and 7072 transitions. [2021-06-05 05:17:33,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:17:33,877 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:33,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:33,880 INFO L225 Difference]: With dead ends: 2878 [2021-06-05 05:17:33,880 INFO L226 Difference]: Without dead ends: 2860 [2021-06-05 05:17:33,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1303.0ms TimeCoverageRelationStatistics Valid=281, Invalid=1441, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:17:33,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2860 states. [2021-06-05 05:17:33,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2860 to 1325. [2021-06-05 05:17:33,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1324 states have (on average 2.4040785498489425) internal successors, (3183), 1324 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:33,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 3183 transitions. [2021-06-05 05:17:33,895 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 3183 transitions. Word has length 30 [2021-06-05 05:17:33,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:33,895 INFO L482 AbstractCegarLoop]: Abstraction has 1325 states and 3183 transitions. [2021-06-05 05:17:33,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:33,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 3183 transitions. [2021-06-05 05:17:33,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:33,896 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:33,896 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:34,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable628,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:34,096 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:34,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:34,097 INFO L82 PathProgramCache]: Analyzing trace with hash -457303797, now seen corresponding path program 105 times [2021-06-05 05:17:34,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:34,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53460426] [2021-06-05 05:17:34,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:34,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:34,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:34,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:34,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53460426] [2021-06-05 05:17:34,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53460426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:34,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796525076] [2021-06-05 05:17:34,353 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 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:34,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:17:34,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:34,375 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:17:34,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:34,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:34,655 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 27 treesize of output 15 [2021-06-05 05:17:34,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:34,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:34,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:34,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:9 [2021-06-05 05:17:34,694 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:34,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796525076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:34,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:34,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-06-05 05:17:34,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432792759] [2021-06-05 05:17:34,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:17:34,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:34,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:17:34,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:17:34,695 INFO L87 Difference]: Start difference. First operand 1325 states and 3183 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:35,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:35,900 INFO L93 Difference]: Finished difference Result 2761 states and 6759 transitions. [2021-06-05 05:17:35,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:17:35,900 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:35,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:35,903 INFO L225 Difference]: With dead ends: 2761 [2021-06-05 05:17:35,903 INFO L226 Difference]: Without dead ends: 2752 [2021-06-05 05:17:35,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 991.5ms TimeCoverageRelationStatistics Valid=246, Invalid=1160, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:17:35,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2752 states. [2021-06-05 05:17:35,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2752 to 1320. [2021-06-05 05:17:35,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 2.404852160727824) internal successors, (3172), 1319 states have internal predecessors, (3172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:35,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 3172 transitions. [2021-06-05 05:17:35,918 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 3172 transitions. Word has length 30 [2021-06-05 05:17:35,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:35,918 INFO L482 AbstractCegarLoop]: Abstraction has 1320 states and 3172 transitions. [2021-06-05 05:17:35,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:35,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 3172 transitions. [2021-06-05 05:17:35,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:35,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:35,919 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:36,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:36,120 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:36,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:36,120 INFO L82 PathProgramCache]: Analyzing trace with hash -642395277, now seen corresponding path program 105 times [2021-06-05 05:17:36,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:36,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618314616] [2021-06-05 05:17:36,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:36,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:36,414 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:36,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:36,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618314616] [2021-06-05 05:17:36,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618314616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:36,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156938366] [2021-06-05 05:17:36,414 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 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:36,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:17:36,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:36,436 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:36,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:36,700 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 20 treesize of output 12 [2021-06-05 05:17:36,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:36,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:36,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:36,703 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:17:36,741 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:36,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156938366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:36,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:36,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:17:36,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422708821] [2021-06-05 05:17:36,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:17:36,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:36,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:17:36,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:17:36,742 INFO L87 Difference]: Start difference. First operand 1320 states and 3172 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:41,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:41,078 INFO L93 Difference]: Finished difference Result 2899 states and 7054 transitions. [2021-06-05 05:17:41,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 05:17:41,078 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:41,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:41,081 INFO L225 Difference]: With dead ends: 2899 [2021-06-05 05:17:41,081 INFO L226 Difference]: Without dead ends: 2871 [2021-06-05 05:17:41,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 3476.0ms TimeCoverageRelationStatistics Valid=788, Invalid=3634, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 05:17:41,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2021-06-05 05:17:41,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 1311. [2021-06-05 05:17:41,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1311 states, 1310 states have (on average 2.404580152671756) internal successors, (3150), 1310 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:41,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 3150 transitions. [2021-06-05 05:17:41,095 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 3150 transitions. Word has length 30 [2021-06-05 05:17:41,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:41,095 INFO L482 AbstractCegarLoop]: Abstraction has 1311 states and 3150 transitions. [2021-06-05 05:17:41,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:41,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 3150 transitions. [2021-06-05 05:17:41,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:41,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:41,096 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:41,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-06-05 05:17:41,297 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:41,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:41,297 INFO L82 PathProgramCache]: Analyzing trace with hash -953230119, now seen corresponding path program 106 times [2021-06-05 05:17:41,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:41,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229365614] [2021-06-05 05:17:41,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:41,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:41,624 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:41,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:41,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229365614] [2021-06-05 05:17:41,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229365614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:41,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662048892] [2021-06-05 05:17:41,624 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 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:41,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:17:41,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:41,645 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:41,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:41,906 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 20 treesize of output 12 [2021-06-05 05:17:41,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:41,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:41,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:41,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:17:41,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:41,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662048892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:41,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:41,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:17:41,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772173389] [2021-06-05 05:17:41,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:17:41,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:41,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:17:41,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:17:41,948 INFO L87 Difference]: Start difference. First operand 1311 states and 3150 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:46,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:46,022 INFO L93 Difference]: Finished difference Result 2816 states and 6861 transitions. [2021-06-05 05:17:46,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 05:17:46,023 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:46,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:46,026 INFO L225 Difference]: With dead ends: 2816 [2021-06-05 05:17:46,026 INFO L226 Difference]: Without dead ends: 2800 [2021-06-05 05:17:46,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1568 ImplicationChecksByTransitivity, 3418.6ms TimeCoverageRelationStatistics Valid=799, Invalid=4313, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 05:17:46,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2800 states. [2021-06-05 05:17:46,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2800 to 1300. [2021-06-05 05:17:46,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1299 states have (on average 2.405696689761355) internal successors, (3125), 1299 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:46,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 3125 transitions. [2021-06-05 05:17:46,040 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 3125 transitions. Word has length 30 [2021-06-05 05:17:46,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:46,040 INFO L482 AbstractCegarLoop]: Abstraction has 1300 states and 3125 transitions. [2021-06-05 05:17:46,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:46,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 3125 transitions. [2021-06-05 05:17:46,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:46,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:46,041 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:46,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-06-05 05:17:46,242 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:46,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:46,242 INFO L82 PathProgramCache]: Analyzing trace with hash 2146780385, now seen corresponding path program 106 times [2021-06-05 05:17:46,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:46,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616263282] [2021-06-05 05:17:46,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:46,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:46,583 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:46,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:46,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616263282] [2021-06-05 05:17:46,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616263282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:46,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596295134] [2021-06-05 05:17:46,583 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 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:46,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:17:46,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:46,604 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:46,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:46,867 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 19 treesize of output 11 [2021-06-05 05:17:46,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:46,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:46,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:46,871 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:7 [2021-06-05 05:17:46,906 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:46,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596295134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:46,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:46,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 05:17:46,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049860277] [2021-06-05 05:17:46,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:17:46,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:46,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:17:46,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:17:46,907 INFO L87 Difference]: Start difference. First operand 1300 states and 3125 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:51,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:51,163 INFO L93 Difference]: Finished difference Result 2958 states and 7213 transitions. [2021-06-05 05:17:51,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 05:17:51,163 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:51,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:51,166 INFO L225 Difference]: With dead ends: 2958 [2021-06-05 05:17:51,166 INFO L226 Difference]: Without dead ends: 2940 [2021-06-05 05:17:51,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1510 ImplicationChecksByTransitivity, 3416.7ms TimeCoverageRelationStatistics Valid=836, Invalid=3856, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 05:17:51,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2021-06-05 05:17:51,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 1281. [2021-06-05 05:17:51,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1280 states have (on average 2.403125) internal successors, (3076), 1280 states have internal predecessors, (3076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:51,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 3076 transitions. [2021-06-05 05:17:51,180 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 3076 transitions. Word has length 30 [2021-06-05 05:17:51,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:51,180 INFO L482 AbstractCegarLoop]: Abstraction has 1281 states and 3076 transitions. [2021-06-05 05:17:51,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:51,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 3076 transitions. [2021-06-05 05:17:51,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:51,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:51,181 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:51,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable632 [2021-06-05 05:17:51,381 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:51,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:51,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1287495927, now seen corresponding path program 107 times [2021-06-05 05:17:51,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:51,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183079664] [2021-06-05 05:17:51,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:51,651 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:51,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:51,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183079664] [2021-06-05 05:17:51,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183079664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:51,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627695996] [2021-06-05 05:17:51,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:51,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:17:51,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:51,674 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:51,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:51,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:17:51,884 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 29 treesize of output 17 [2021-06-05 05:17:51,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:51,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:51,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:51,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:11 [2021-06-05 05:17:51,927 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:51,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627695996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:51,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:51,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 05:17:51,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271625848] [2021-06-05 05:17:51,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:17:51,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:51,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:17:51,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:17:51,928 INFO L87 Difference]: Start difference. First operand 1281 states and 3076 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:53,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:53,727 INFO L93 Difference]: Finished difference Result 2902 states and 7138 transitions. [2021-06-05 05:17:53,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:17:53,727 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:53,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:53,730 INFO L225 Difference]: With dead ends: 2902 [2021-06-05 05:17:53,730 INFO L226 Difference]: Without dead ends: 2881 [2021-06-05 05:17:53,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1338.2ms TimeCoverageRelationStatistics Valid=298, Invalid=1424, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:17:53,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2881 states. [2021-06-05 05:17:53,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2881 to 1245. [2021-06-05 05:17:53,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1244 states have (on average 2.40032154340836) internal successors, (2986), 1244 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:53,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 2986 transitions. [2021-06-05 05:17:53,745 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 2986 transitions. Word has length 30 [2021-06-05 05:17:53,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:53,745 INFO L482 AbstractCegarLoop]: Abstraction has 1245 states and 2986 transitions. [2021-06-05 05:17:53,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:53,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 2986 transitions. [2021-06-05 05:17:53,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:53,746 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:53,746 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:53,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable633,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:53,946 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:53,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:53,947 INFO L82 PathProgramCache]: Analyzing trace with hash 392509123, now seen corresponding path program 108 times [2021-06-05 05:17:53,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:53,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066073130] [2021-06-05 05:17:53,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:53,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:54,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:54,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:54,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066073130] [2021-06-05 05:17:54,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066073130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:54,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657161707] [2021-06-05 05:17:54,218 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 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:54,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:17:54,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:54,240 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:54,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:54,468 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 20 treesize of output 12 [2021-06-05 05:17:54,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:54,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:54,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:54,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:17:54,504 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:54,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657161707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:54,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:54,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 05:17:54,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737225457] [2021-06-05 05:17:54,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:17:54,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:54,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:17:54,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:17:54,505 INFO L87 Difference]: Start difference. First operand 1245 states and 2986 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:56,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:56,360 INFO L93 Difference]: Finished difference Result 2885 states and 7120 transitions. [2021-06-05 05:17:56,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:17:56,360 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:17:56,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:56,363 INFO L225 Difference]: With dead ends: 2885 [2021-06-05 05:17:56,363 INFO L226 Difference]: Without dead ends: 2876 [2021-06-05 05:17:56,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1147.2ms TimeCoverageRelationStatistics Valid=243, Invalid=1563, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:17:56,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-06-05 05:17:56,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 1257. [2021-06-05 05:17:56,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1256 states have (on average 2.4020700636942673) internal successors, (3017), 1256 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:56,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 3017 transitions. [2021-06-05 05:17:56,378 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 3017 transitions. Word has length 30 [2021-06-05 05:17:56,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:56,378 INFO L482 AbstractCegarLoop]: Abstraction has 1257 states and 3017 transitions. [2021-06-05 05:17:56,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:56,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 3017 transitions. [2021-06-05 05:17:56,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:56,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:56,380 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:56,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable634 [2021-06-05 05:17:56,580 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:56,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:56,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1463230271, now seen corresponding path program 109 times [2021-06-05 05:17:56,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:56,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464678397] [2021-06-05 05:17:56,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:56,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:56,840 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:56,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:56,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464678397] [2021-06-05 05:17:56,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464678397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:56,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868258229] [2021-06-05 05:17:56,841 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 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:56,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:56,862 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:56,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:57,113 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 20 treesize of output 12 [2021-06-05 05:17:57,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:57,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:57,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:57,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 05:17:57,151 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:57,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868258229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:57,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:57,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-06-05 05:17:57,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234489030] [2021-06-05 05:17:57,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:17:57,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:57,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:17:57,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:17:57,152 INFO L87 Difference]: Start difference. First operand 1257 states and 3017 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:58,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:17:58,879 INFO L93 Difference]: Finished difference Result 2874 states and 7092 transitions. [2021-06-05 05:17:58,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:17:58,880 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) 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 30 [2021-06-05 05:17:58,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:17:58,883 INFO L225 Difference]: With dead ends: 2874 [2021-06-05 05:17:58,883 INFO L226 Difference]: Without dead ends: 2865 [2021-06-05 05:17:58,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1216.9ms TimeCoverageRelationStatistics Valid=259, Invalid=1633, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:17:58,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2865 states. [2021-06-05 05:17:58,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2865 to 1257. [2021-06-05 05:17:58,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1256 states have (on average 2.4020700636942673) internal successors, (3017), 1256 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:58,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 3017 transitions. [2021-06-05 05:17:58,898 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 3017 transitions. Word has length 30 [2021-06-05 05:17:58,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:17:58,898 INFO L482 AbstractCegarLoop]: Abstraction has 1257 states and 3017 transitions. [2021-06-05 05:17:58,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:17:58,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 3017 transitions. [2021-06-05 05:17:58,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:17:58,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:17:58,899 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:17:59,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable635 [2021-06-05 05:17:59,099 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:17:59,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:17:59,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1632232231, now seen corresponding path program 110 times [2021-06-05 05:17:59,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:17:59,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425477006] [2021-06-05 05:17:59,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:17:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:17:59,420 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:59,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:17:59,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425477006] [2021-06-05 05:17:59,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425477006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:59,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831620828] [2021-06-05 05:17:59,420 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 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:17:59,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:17:59,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:17:59,442 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 05:17:59,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:17:59,641 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 20 treesize of output 12 [2021-06-05 05:17:59,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:17:59,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:17:59,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:17:59,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 05:17:59,684 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:17:59,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831620828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:17:59,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:17:59,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 05:17:59,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210269017] [2021-06-05 05:17:59,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:17:59,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:17:59,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:17:59,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:17:59,685 INFO L87 Difference]: Start difference. First operand 1257 states and 3017 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 05:18:01,181 WARN L222 SmtUtils]: Removed 7 from assertion stack [2021-06-05 05:18:01,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:18:01,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable636,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:18:01,382 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 05:18:01,383 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 05:18:01,385 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 05:18:01,385 INFO L202 PluginConnector]: Adding new model misc-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 05:18:01 BasicIcfg [2021-06-05 05:18:01,385 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 05:18:01,385 INFO L168 Benchmark]: Toolchain (without parser) took 817835.27 ms. Allocated memory was 364.9 MB in the beginning and 438.3 MB in the end (delta: 73.4 MB). Free memory was 345.0 MB in the beginning and 195.4 MB in the end (delta: 149.6 MB). Peak memory consumption was 224.9 MB. Max. memory is 16.0 GB. [2021-06-05 05:18:01,385 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 364.9 MB. Free memory was 346.1 MB in the beginning and 346.1 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 05:18:01,385 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.11 ms. Allocated memory is still 364.9 MB. Free memory was 344.9 MB in the beginning and 343.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 05:18:01,385 INFO L168 Benchmark]: Boogie Preprocessor took 13.81 ms. Allocated memory is still 364.9 MB. Free memory was 343.5 MB in the beginning and 342.5 MB in the end (delta: 973.7 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 05:18:01,385 INFO L168 Benchmark]: RCFGBuilder took 197.18 ms. Allocated memory is still 364.9 MB. Free memory was 342.4 MB in the beginning and 330.5 MB in the end (delta: 11.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 05:18:01,385 INFO L168 Benchmark]: TraceAbstraction took 817602.33 ms. Allocated memory was 364.9 MB in the beginning and 438.3 MB in the end (delta: 73.4 MB). Free memory was 330.0 MB in the beginning and 195.4 MB in the end (delta: 134.7 MB). Peak memory consumption was 210.2 MB. Max. memory is 16.0 GB. [2021-06-05 05:18:01,386 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 0.13 ms. Allocated memory is still 364.9 MB. Free memory was 346.1 MB in the beginning and 346.1 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.11 ms. Allocated memory is still 364.9 MB. Free memory was 344.9 MB in the beginning and 343.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.81 ms. Allocated memory is still 364.9 MB. Free memory was 343.5 MB in the beginning and 342.5 MB in the end (delta: 973.7 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 197.18 ms. Allocated memory is still 364.9 MB. Free memory was 342.4 MB in the beginning and 330.5 MB in the end (delta: 11.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 817602.33 ms. Allocated memory was 364.9 MB in the beginning and 438.3 MB in the end (delta: 73.4 MB). Free memory was 330.0 MB in the beginning and 195.4 MB in the end (delta: 134.7 MB). Peak memory consumption was 210.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1257states) and FLOYD_HOARE automaton (currently 26 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 33ms.. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1257states) and FLOYD_HOARE automaton (currently 26 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 33ms.. - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1257states) and FLOYD_HOARE automaton (currently 26 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 26 for 33ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 48 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 817529.3ms, OverallIterations: 312, TraceHistogramMax: 2, EmptinessCheckTime: 306.5ms, AutomataDifference: 596618.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 39.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 8791 SDtfs, 82270 SDslu, 69566 SDs, 0 SdLazy, 390908 SolverSat, 42586 SolverUnsat, 34 SolverUnknown, 0 SolverNotchecked, 280682.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20161 GetRequests, 6250 SyntacticMatches, 1016 SemanticMatches, 12894 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174917 ImplicationChecksByTransitivity, 385950.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1364occurred in iteration=299, InterpolantAutomatonStates: 10372, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4050.6ms AutomataMinimizationTime, 311 MinimizatonAttempts, 434074 StatesRemovedByMinimization, 311 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 798.0ms SsaConstructionTime, 2507.8ms SatisfiabilityAnalysisTime, 145002.4ms InterpolantComputationTime, 18218 NumberOfCodeBlocks, 18206 NumberOfCodeBlocksAsserted, 1116 NumberOfCheckSat, 17596 ConstructedInterpolants, 140 QuantifiedInterpolants, 377226 SizeOfPredicates, 2262 NumberOfNonLiveVariables, 18840 ConjunctsInSsa, 9292 ConjunctsInUnsatCore, 622 InterpolantComputations, 2 PerfectInterpolantSequences, 89/6745 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown