/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dot-product-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:27:20,067 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:27:20,071 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:27:20,098 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:27:20,116 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-13 20:27:20,117 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-13 20:27:20,118 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-13 20:27:20,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-13 20:27:20,120 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-13 20:27:20,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-13 20:27:20,125 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-13 20:27:20,130 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-13 20:27:20,131 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-13 20:27:20,132 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-13 20:27:20,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-13 20:27:20,134 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-13 20:27:20,138 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-07-13 20:27:20,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-13 20:27:20,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-13 20:27:20,151 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-13 20:27:20,152 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 [2021-07-13 20:27:20,178 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:27:20,178 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:27:20,178 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:27:20,178 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:27:20,180 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:27:20,180 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:27:20,180 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:27:20,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:27:20,181 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:27:20,181 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:27:20,181 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:27:20,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:27:20,182 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:27:20,182 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:27:20,182 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:27:20,182 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:27:20,182 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:27:20,182 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:27:20,182 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:27:20,182 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:27:20,182 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:27:20,182 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:27:20,182 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:27:20,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:27:20,183 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:27:20,183 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:27:20,183 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:27:20,183 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:27:20,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:27:20,183 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:27:20,183 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:27:20,183 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:27:20,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:27:20,454 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:27:20,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:27:20,457 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:27:20,458 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:27:20,459 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dot-product-array.wvr.bpl [2021-07-13 20:27:20,459 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dot-product-array.wvr.bpl' [2021-07-13 20:27:20,488 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:27:20,490 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:27:20,490 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:27:20,491 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:27:20,491 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:27:20,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:27:20" (1/1) ... [2021-07-13 20:27:20,510 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:27:20" (1/1) ... [2021-07-13 20:27:20,516 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:27:20,517 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:27:20,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:27:20,518 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:27:20,524 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:27:20" (1/1) ... [2021-07-13 20:27:20,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:27:20" (1/1) ... [2021-07-13 20:27:20,526 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:27:20" (1/1) ... [2021-07-13 20:27:20,526 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:27:20" (1/1) ... [2021-07-13 20:27:20,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:27:20" (1/1) ... [2021-07-13 20:27:20,533 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:27:20" (1/1) ... [2021-07-13 20:27:20,533 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:27:20" (1/1) ... [2021-07-13 20:27:20,537 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:27:20,538 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:27:20,538 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:27:20,539 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:27:20,540 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:27:20" (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 [2021-07-13 20:27:20,591 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:27:20,592 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:27:20,592 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:27:20,592 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:27:20,592 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:27:20,592 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:27:20,592 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:27:20,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:27:20,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:27:20,592 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 20:27:20,592 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 20:27:20,592 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 20:27:20,593 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 20:27:20,777 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:27:20,777 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 20:27:20,779 INFO L202 PluginConnector]: Adding new model dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:27:20 BoogieIcfgContainer [2021-07-13 20:27:20,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:27:20,780 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:27:20,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:27:20,782 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:27:20,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:27:20" (1/2) ... [2021-07-13 20:27:20,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@670a7c8b and model type dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:27:20, skipping insertion in model container [2021-07-13 20:27:20,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:27:20" (2/2) ... [2021-07-13 20:27:20,784 INFO L111 eAbstractionObserver]: Analyzing ICFG dot-product-array.wvr.bpl [2021-07-13 20:27:20,788 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:27:20,788 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:27:20,788 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:27:20,788 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:27:20,840 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-13 20:27:20,855 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-13 20:27:20,868 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:27:20,868 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:27:20,868 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:27:20,868 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:27:20,868 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:27:20,868 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:27:20,868 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:27:20,868 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:27:20,875 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-07-13 20:27:20,910 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:20,912 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:20,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 20:27:20,919 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:20,919 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:20,920 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:20,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:20,925 INFO L82 PathProgramCache]: Analyzing trace with hash 952922745, now seen corresponding path program 1 times [2021-07-13 20:27:20,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:20,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497532426] [2021-07-13 20:27:20,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:20,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:21,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:21,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497532426] [2021-07-13 20:27:21,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497532426] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:27:21,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:27:21,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:27:21,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112034729] [2021-07-13 20:27:21,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:27:21,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:21,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:27:21,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:27:21,093 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:21,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:21,138 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-07-13 20:27:21,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:27:21,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 20:27:21,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:21,151 INFO L225 Difference]: With dead ends: 217 [2021-07-13 20:27:21,151 INFO L226 Difference]: Without dead ends: 202 [2021-07-13 20:27:21,153 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:27:21,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-07-13 20:27:21,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-07-13 20:27:21,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:21,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-07-13 20:27:21,201 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-07-13 20:27:21,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:21,202 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-07-13 20:27:21,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:21,202 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-07-13 20:27:21,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:27:21,203 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:21,203 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:21,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:27:21,204 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:21,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:21,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1603966247, now seen corresponding path program 1 times [2021-07-13 20:27:21,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:21,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467103470] [2021-07-13 20:27:21,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:21,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:27:21,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:21,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467103470] [2021-07-13 20:27:21,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467103470] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:27:21,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:27:21,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:27:21,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105459821] [2021-07-13 20:27:21,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:27:21,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:21,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:27:21,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:27:21,248 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:21,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:21,277 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-07-13 20:27:21,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:27:21,278 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 20:27:21,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:21,279 INFO L225 Difference]: With dead ends: 158 [2021-07-13 20:27:21,279 INFO L226 Difference]: Without dead ends: 158 [2021-07-13 20:27:21,279 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:27:21,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-07-13 20:27:21,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-07-13 20:27:21,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:21,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-07-13 20:27:21,286 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-07-13 20:27:21,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:21,286 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-07-13 20:27:21,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:21,287 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-07-13 20:27:21,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:27:21,287 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:21,288 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:21,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 20:27:21,288 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:21,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:21,288 INFO L82 PathProgramCache]: Analyzing trace with hash 5118359, now seen corresponding path program 1 times [2021-07-13 20:27:21,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:21,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210758974] [2021-07-13 20:27:21,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:21,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:27:21,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:21,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210758974] [2021-07-13 20:27:21,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210758974] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:27:21,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:27:21,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:27:21,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317180991] [2021-07-13 20:27:21,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:27:21,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:21,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:27:21,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:27:21,333 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:21,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:21,380 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-07-13 20:27:21,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:27:21,380 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 20:27:21,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:21,381 INFO L225 Difference]: With dead ends: 183 [2021-07-13 20:27:21,382 INFO L226 Difference]: Without dead ends: 183 [2021-07-13 20:27:21,382 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:27:21,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-07-13 20:27:21,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-07-13 20:27:21,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:21,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-07-13 20:27:21,389 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-07-13 20:27:21,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:21,389 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-07-13 20:27:21,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:21,389 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-07-13 20:27:21,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:27:21,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:21,390 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:21,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 20:27:21,391 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:21,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:21,391 INFO L82 PathProgramCache]: Analyzing trace with hash -443909641, now seen corresponding path program 1 times [2021-07-13 20:27:21,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:21,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84958006] [2021-07-13 20:27:21,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:21,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:21,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:21,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:21,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84958006] [2021-07-13 20:27:21,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84958006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:21,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274645650] [2021-07-13 20:27:21,628 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 [2021-07-13 20:27:21,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:21,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:27:21,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:21,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:27:21,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-07-13 20:27:21,949 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:27:21,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:21,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:27:21,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-13 20:27:21,964 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:27:21,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:21,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 7 [2021-07-13 20:27:21,973 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:21,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:21,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:21,979 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:29, output treesize:3 [2021-07-13 20:27:22,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:22,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274645650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:22,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:22,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:27:22,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746606178] [2021-07-13 20:27:22,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:27:22,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:22,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:27:22,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:27:22,002 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:22,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:22,209 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-07-13 20:27:22,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:27:22,209 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 20:27:22,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:22,211 INFO L225 Difference]: With dead ends: 330 [2021-07-13 20:27:22,211 INFO L226 Difference]: Without dead ends: 315 [2021-07-13 20:27:22,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 254.8ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:27:22,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-07-13 20:27:22,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-07-13 20:27:22,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:22,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-07-13 20:27:22,221 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-07-13 20:27:22,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:22,222 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-07-13 20:27:22,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:22,222 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-07-13 20:27:22,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:27:22,223 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:22,223 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:22,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:22,440 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:22,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:22,440 INFO L82 PathProgramCache]: Analyzing trace with hash -611718733, now seen corresponding path program 2 times [2021-07-13 20:27:22,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:22,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5510439] [2021-07-13 20:27:22,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:22,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:22,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:22,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:22,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5510439] [2021-07-13 20:27:22,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5510439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:22,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85227571] [2021-07-13 20:27:22,607 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 [2021-07-13 20:27:22,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:27:22,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:22,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:27:22,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:22,759 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:22,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-07-13 20:27:22,829 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:27:22,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:22,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:22,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-07-13 20:27:22,891 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:27:22,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:22,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:22,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-07-13 20:27:22,927 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:27:22,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:22,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:22,968 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:32, output treesize:19 [2021-07-13 20:27:23,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:23,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85227571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:23,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:23,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-07-13 20:27:23,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663715629] [2021-07-13 20:27:23,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:27:23,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:23,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:27:23,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:27:23,014 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:23,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:23,378 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-07-13 20:27:23,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:27:23,378 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 20:27:23,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:23,383 INFO L225 Difference]: With dead ends: 374 [2021-07-13 20:27:23,386 INFO L226 Difference]: Without dead ends: 359 [2021-07-13 20:27:23,386 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 341.2ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:27:23,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-07-13 20:27:23,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-07-13 20:27:23,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:23,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-07-13 20:27:23,403 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-07-13 20:27:23,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:23,409 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-07-13 20:27:23,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:23,409 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-07-13 20:27:23,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:27:23,410 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:23,410 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:23,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:23,629 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:23,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:23,630 INFO L82 PathProgramCache]: Analyzing trace with hash -312945285, now seen corresponding path program 3 times [2021-07-13 20:27:23,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:23,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382429150] [2021-07-13 20:27:23,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:23,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:23,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:23,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:23,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382429150] [2021-07-13 20:27:23,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382429150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:23,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8335807] [2021-07-13 20:27:23,762 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 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 [2021-07-13 20:27:23,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:27:23,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:23,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:27:23,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:23,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-07-13 20:27:23,880 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:27:23,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:23,885 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 19 treesize of output 15 [2021-07-13 20:27:23,888 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:27:23,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:23,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 7 [2021-07-13 20:27:23,896 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:23,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:23,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:23,915 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:31, output treesize:3 [2021-07-13 20:27:23,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:23,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8335807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:23,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:23,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:27:23,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838380682] [2021-07-13 20:27:23,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:27:23,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:23,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:27:23,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:27:23,941 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:24,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:24,073 INFO L93 Difference]: Finished difference Result 363 states and 1038 transitions. [2021-07-13 20:27:24,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:27:24,074 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 20:27:24,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:24,075 INFO L225 Difference]: With dead ends: 363 [2021-07-13 20:27:24,075 INFO L226 Difference]: Without dead ends: 348 [2021-07-13 20:27:24,078 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 170.7ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:27:24,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-07-13 20:27:24,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 241. [2021-07-13 20:27:24,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:24,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-07-13 20:27:24,085 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-07-13 20:27:24,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:24,085 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-07-13 20:27:24,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:24,085 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-07-13 20:27:24,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:27:24,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:24,086 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:24,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-13 20:27:24,303 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:24,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:24,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1257880315, now seen corresponding path program 4 times [2021-07-13 20:27:24,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:24,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036418280] [2021-07-13 20:27:24,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:24,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:24,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:24,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036418280] [2021-07-13 20:27:24,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036418280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:24,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375289539] [2021-07-13 20:27:24,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:24,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:27:24,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:24,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:27:24,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:24,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:24,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-07-13 20:27:24,572 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:27:24,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:24,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:24,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-07-13 20:27:24,616 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:27:24,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:24,635 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:24,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-07-13 20:27:24,636 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:27:24,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:24,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:24,682 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:34, output treesize:19 [2021-07-13 20:27:24,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:24,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375289539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:24,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:24,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:27:24,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939659288] [2021-07-13 20:27:24,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:27:24,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:24,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:27:24,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:27:24,738 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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) [2021-07-13 20:27:24,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:24,907 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-07-13 20:27:24,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:27:24,908 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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 22 [2021-07-13 20:27:24,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:24,910 INFO L225 Difference]: With dead ends: 425 [2021-07-13 20:27:24,911 INFO L226 Difference]: Without dead ends: 410 [2021-07-13 20:27:24,912 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 204.5ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:27:24,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-07-13 20:27:24,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-07-13 20:27:24,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:24,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-07-13 20:27:24,918 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-07-13 20:27:24,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:24,919 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-07-13 20:27:24,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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) [2021-07-13 20:27:24,919 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-07-13 20:27:24,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:27:24,920 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:24,920 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:25,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:25,141 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:25,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:25,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1884155861, now seen corresponding path program 5 times [2021-07-13 20:27:25,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:25,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243547062] [2021-07-13 20:27:25,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:25,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:25,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:25,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:25,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243547062] [2021-07-13 20:27:25,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243547062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:25,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618061032] [2021-07-13 20:27:25,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:25,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:27:25,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:25,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:27:25,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:25,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:25,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618061032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:25,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:25,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:27:25,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943765852] [2021-07-13 20:27:25,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:27:25,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:25,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:27:25,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:27:25,290 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:25,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:25,634 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-07-13 20:27:25,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:27:25,634 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:27:25,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:25,637 INFO L225 Difference]: With dead ends: 619 [2021-07-13 20:27:25,637 INFO L226 Difference]: Without dead ends: 619 [2021-07-13 20:27:25,637 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 198.4ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:27:25,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-07-13 20:27:25,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-07-13 20:27:25,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:25,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-07-13 20:27:25,645 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-07-13 20:27:25,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:25,645 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-07-13 20:27:25,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:25,645 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-07-13 20:27:25,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:27:25,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:25,646 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:25,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:25,857 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:25,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:25,857 INFO L82 PathProgramCache]: Analyzing trace with hash 907837017, now seen corresponding path program 6 times [2021-07-13 20:27:25,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:25,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990875712] [2021-07-13 20:27:25,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:25,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:25,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:25,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:25,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990875712] [2021-07-13 20:27:25,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990875712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:25,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615489281] [2021-07-13 20:27:25,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:25,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:27:25,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:25,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:27:25,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:26,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615489281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:26,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:26,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:27:26,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22054027] [2021-07-13 20:27:26,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:27:26,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:26,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:27:26,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:27:26,011 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:26,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:26,674 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-07-13 20:27:26,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:27:26,675 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:27:26,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:26,678 INFO L225 Difference]: With dead ends: 1078 [2021-07-13 20:27:26,679 INFO L226 Difference]: Without dead ends: 1078 [2021-07-13 20:27:26,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 428.3ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:27:26,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-07-13 20:27:26,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-07-13 20:27:26,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:26,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-07-13 20:27:26,690 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-07-13 20:27:26,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:26,690 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-07-13 20:27:26,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:26,690 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-07-13 20:27:26,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:27:26,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:26,691 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:26,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:26,907 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:26,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:26,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1474789097, now seen corresponding path program 7 times [2021-07-13 20:27:26,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:26,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69209061] [2021-07-13 20:27:26,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:26,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:26,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:26,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:26,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69209061] [2021-07-13 20:27:26,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69209061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:26,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498505955] [2021-07-13 20:27:26,949 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:26,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:26,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:27:26,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:27,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:27,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498505955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:27,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:27,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:27:27,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947754911] [2021-07-13 20:27:27,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:27:27,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:27,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:27:27,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:27:27,060 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:27,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:27,750 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-07-13 20:27:27,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:27:27,751 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:27:27,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:27,754 INFO L225 Difference]: With dead ends: 951 [2021-07-13 20:27:27,755 INFO L226 Difference]: Without dead ends: 951 [2021-07-13 20:27:27,755 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 428.6ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:27:27,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-07-13 20:27:27,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-07-13 20:27:27,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:27,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-07-13 20:27:27,764 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-07-13 20:27:27,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:27,765 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-07-13 20:27:27,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:27,766 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-07-13 20:27:27,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:27:27,766 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:27,766 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:27,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:27,985 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:27,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:27,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1884039527, now seen corresponding path program 1 times [2021-07-13 20:27:27,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:27,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290534809] [2021-07-13 20:27:27,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:27,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:28,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:27:28,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:28,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290534809] [2021-07-13 20:27:28,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290534809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:28,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148832961] [2021-07-13 20:27:28,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:28,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:28,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:27:28,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:28,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:27:28,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148832961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:28,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:28,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:27:28,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457172531] [2021-07-13 20:27:28,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:27:28,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:28,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:27:28,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:27:28,082 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:28,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:28,171 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-07-13 20:27:28,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:27:28,171 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:27:28,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:28,174 INFO L225 Difference]: With dead ends: 669 [2021-07-13 20:27:28,174 INFO L226 Difference]: Without dead ends: 663 [2021-07-13 20:27:28,174 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:27:28,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-07-13 20:27:28,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-07-13 20:27:28,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:28,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-07-13 20:27:28,184 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-07-13 20:27:28,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:28,184 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-07-13 20:27:28,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:28,184 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-07-13 20:27:28,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:27:28,185 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:28,185 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:28,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-07-13 20:27:28,401 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:28,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:28,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1973959061, now seen corresponding path program 8 times [2021-07-13 20:27:28,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:28,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766309998] [2021-07-13 20:27:28,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:28,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:28,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:28,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766309998] [2021-07-13 20:27:28,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766309998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:28,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504504514] [2021-07-13 20:27:28,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:28,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:27:28,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:28,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:27:28,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:28,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504504514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:28,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:28,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:27:28,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618841756] [2021-07-13 20:27:28,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:27:28,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:28,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:27:28,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:27:28,590 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:28,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:28,738 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-07-13 20:27:28,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:27:28,738 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:27:28,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:28,741 INFO L225 Difference]: With dead ends: 710 [2021-07-13 20:27:28,741 INFO L226 Difference]: Without dead ends: 672 [2021-07-13 20:27:28,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 132.4ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:27:28,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-07-13 20:27:28,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-07-13 20:27:28,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:28,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-07-13 20:27:28,752 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-07-13 20:27:28,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:28,752 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-07-13 20:27:28,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:28,752 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-07-13 20:27:28,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:27:28,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:28,753 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:28,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:28,972 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:28,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:28,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1268001729, now seen corresponding path program 2 times [2021-07-13 20:27:28,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:28,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152719701] [2021-07-13 20:27:28,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:28,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:28,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:27:28,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:28,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152719701] [2021-07-13 20:27:28,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152719701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:28,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631172445] [2021-07-13 20:27:28,995 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 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 [2021-07-13 20:27:29,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:27:29,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:29,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:27:29,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:29,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:27:29,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631172445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:29,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:29,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:27:29,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37356542] [2021-07-13 20:27:29,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:27:29,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:29,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:27:29,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:27:29,087 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:29,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:29,175 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-07-13 20:27:29,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:27:29,175 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:27:29,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:29,178 INFO L225 Difference]: With dead ends: 830 [2021-07-13 20:27:29,178 INFO L226 Difference]: Without dead ends: 830 [2021-07-13 20:27:29,179 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:27:29,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-07-13 20:27:29,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-07-13 20:27:29,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:29,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-07-13 20:27:29,192 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-07-13 20:27:29,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:29,192 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-07-13 20:27:29,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:29,192 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-07-13 20:27:29,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:27:29,193 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:29,193 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:29,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:29,405 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:29,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:29,405 INFO L82 PathProgramCache]: Analyzing trace with hash -78679837, now seen corresponding path program 9 times [2021-07-13 20:27:29,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:29,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673116577] [2021-07-13 20:27:29,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:29,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:29,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673116577] [2021-07-13 20:27:29,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673116577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:29,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587011843] [2021-07-13 20:27:29,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:29,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:27:29,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:29,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:27:29,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:29,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:29,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587011843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:29,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:29,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:27:29,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204949690] [2021-07-13 20:27:29,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:27:29,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:29,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:27:29,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:27:29,574 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:29,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:29,859 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-07-13 20:27:29,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:27:29,860 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:27:29,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:29,865 INFO L225 Difference]: With dead ends: 1196 [2021-07-13 20:27:29,865 INFO L226 Difference]: Without dead ends: 1196 [2021-07-13 20:27:29,865 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 173.3ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:27:29,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-07-13 20:27:29,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-07-13 20:27:29,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:29,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-07-13 20:27:29,880 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-07-13 20:27:29,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:29,880 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-07-13 20:27:29,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:29,880 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-07-13 20:27:29,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:27:29,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:29,881 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:30,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-13 20:27:30,093 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:30,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:30,093 INFO L82 PathProgramCache]: Analyzing trace with hash 706234257, now seen corresponding path program 10 times [2021-07-13 20:27:30,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:30,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282603216] [2021-07-13 20:27:30,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:30,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:30,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:30,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:30,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282603216] [2021-07-13 20:27:30,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282603216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:30,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952604929] [2021-07-13 20:27:30,129 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 [2021-07-13 20:27:30,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:27:30,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:30,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:27:30,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:30,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:30,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952604929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:30,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:30,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:27:30,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799778011] [2021-07-13 20:27:30,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:27:30,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:30,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:27:30,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:27:30,242 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:30,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:30,654 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-07-13 20:27:30,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:27:30,655 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:27:30,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:30,660 INFO L225 Difference]: With dead ends: 1492 [2021-07-13 20:27:30,660 INFO L226 Difference]: Without dead ends: 1492 [2021-07-13 20:27:30,662 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 254.4ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:27:30,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-07-13 20:27:30,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-07-13 20:27:30,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:30,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-07-13 20:27:30,679 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-07-13 20:27:30,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:30,679 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-07-13 20:27:30,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:30,679 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-07-13 20:27:30,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:27:30,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:30,681 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:30,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-13 20:27:30,893 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:30,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:30,893 INFO L82 PathProgramCache]: Analyzing trace with hash -376788399, now seen corresponding path program 11 times [2021-07-13 20:27:30,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:30,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855693210] [2021-07-13 20:27:30,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:30,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:30,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:30,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:30,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855693210] [2021-07-13 20:27:30,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855693210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:30,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550321190] [2021-07-13 20:27:30,927 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 [2021-07-13 20:27:30,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:27:30,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:30,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:27:30,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:31,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:31,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550321190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:31,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:31,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:27:31,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792678196] [2021-07-13 20:27:31,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:27:31,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:31,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:27:31,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:27:31,024 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:31,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:31,257 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-07-13 20:27:31,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:27:31,257 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:27:31,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:31,261 INFO L225 Difference]: With dead ends: 1258 [2021-07-13 20:27:31,261 INFO L226 Difference]: Without dead ends: 1248 [2021-07-13 20:27:31,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 154.9ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:27:31,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-07-13 20:27:31,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-07-13 20:27:31,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:31,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-07-13 20:27:31,277 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-07-13 20:27:31,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:31,277 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-07-13 20:27:31,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:31,277 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-07-13 20:27:31,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:27:31,279 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:31,279 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:31,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-13 20:27:31,485 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:31,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:31,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1094289719, now seen corresponding path program 12 times [2021-07-13 20:27:31,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:31,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569893088] [2021-07-13 20:27:31,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:31,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:31,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:31,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:31,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569893088] [2021-07-13 20:27:31,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569893088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:31,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100235836] [2021-07-13 20:27:31,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:31,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:27:31,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:31,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:27:31,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:31,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:31,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100235836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:31,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:31,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:27:31,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97934467] [2021-07-13 20:27:31,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:27:31,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:31,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:27:31,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:27:31,607 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:31,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:31,874 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-07-13 20:27:31,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:27:31,875 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:27:31,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:31,879 INFO L225 Difference]: With dead ends: 1329 [2021-07-13 20:27:31,879 INFO L226 Difference]: Without dead ends: 1329 [2021-07-13 20:27:31,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 168.5ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:27:31,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-07-13 20:27:31,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-07-13 20:27:31,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:31,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-07-13 20:27:31,895 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-07-13 20:27:31,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:31,895 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-07-13 20:27:31,895 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) [2021-07-13 20:27:31,895 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-07-13 20:27:31,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:27:31,897 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:31,897 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:32,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:32,114 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:32,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:32,114 INFO L82 PathProgramCache]: Analyzing trace with hash 661413115, now seen corresponding path program 13 times [2021-07-13 20:27:32,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:32,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962486208] [2021-07-13 20:27:32,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:32,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:32,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:32,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962486208] [2021-07-13 20:27:32,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962486208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:32,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379137809] [2021-07-13 20:27:32,146 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 [2021-07-13 20:27:32,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:32,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:27:32,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:32,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:32,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379137809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:32,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:32,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:27:32,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501969609] [2021-07-13 20:27:32,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:27:32,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:32,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:27:32,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:27:32,218 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:32,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:32,542 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-07-13 20:27:32,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:27:32,543 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:27:32,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:32,548 INFO L225 Difference]: With dead ends: 1548 [2021-07-13 20:27:32,548 INFO L226 Difference]: Without dead ends: 1544 [2021-07-13 20:27:32,548 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 181.7ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:27:32,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-07-13 20:27:32,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-07-13 20:27:32,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:32,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-07-13 20:27:32,565 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-07-13 20:27:32,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:32,565 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-07-13 20:27:32,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:32,566 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-07-13 20:27:32,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:27:32,567 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:32,567 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:32,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:32,773 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:32,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:32,773 INFO L82 PathProgramCache]: Analyzing trace with hash 389403925, now seen corresponding path program 14 times [2021-07-13 20:27:32,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:32,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252105058] [2021-07-13 20:27:32,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:32,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:32,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:32,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:32,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252105058] [2021-07-13 20:27:32,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252105058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:32,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828608012] [2021-07-13 20:27:32,820 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 [2021-07-13 20:27:32,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:27:32,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:32,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:27:32,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:32,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:32,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828608012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:32,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:32,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:27:32,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473772980] [2021-07-13 20:27:32,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:27:32,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:32,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:27:32,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:27:32,930 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:33,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:33,671 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-07-13 20:27:33,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:27:33,671 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:27:33,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:33,690 INFO L225 Difference]: With dead ends: 2734 [2021-07-13 20:27:33,690 INFO L226 Difference]: Without dead ends: 2734 [2021-07-13 20:27:33,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 444.8ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:27:33,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-07-13 20:27:33,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-07-13 20:27:33,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:33,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-07-13 20:27:33,725 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-07-13 20:27:33,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:33,725 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-07-13 20:27:33,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:33,725 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-07-13 20:27:33,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:27:33,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:33,727 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:33,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:33,933 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:33,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:33,933 INFO L82 PathProgramCache]: Analyzing trace with hash 956356005, now seen corresponding path program 15 times [2021-07-13 20:27:33,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:33,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142321677] [2021-07-13 20:27:33,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:33,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:33,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:33,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:33,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142321677] [2021-07-13 20:27:33,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142321677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:33,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340171738] [2021-07-13 20:27:33,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:33,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:27:33,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:33,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:27:34,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:34,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:34,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340171738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:34,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:34,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:27:34,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879449650] [2021-07-13 20:27:34,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:27:34,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:34,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:27:34,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:27:34,077 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:34,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:34,741 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-07-13 20:27:34,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:27:34,741 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:27:34,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:34,748 INFO L225 Difference]: With dead ends: 2693 [2021-07-13 20:27:34,748 INFO L226 Difference]: Without dead ends: 2693 [2021-07-13 20:27:34,749 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 396.1ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:27:34,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-07-13 20:27:34,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-07-13 20:27:34,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:34,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-07-13 20:27:34,781 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-07-13 20:27:34,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:34,781 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-07-13 20:27:34,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:34,781 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-07-13 20:27:34,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:27:34,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:34,783 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:34,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-13 20:27:34,993 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:34,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:34,993 INFO L82 PathProgramCache]: Analyzing trace with hash -215989853, now seen corresponding path program 16 times [2021-07-13 20:27:34,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:34,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623890723] [2021-07-13 20:27:34,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:34,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:35,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:35,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:35,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623890723] [2021-07-13 20:27:35,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623890723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:35,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517529069] [2021-07-13 20:27:35,029 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 [2021-07-13 20:27:35,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:27:35,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:35,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:27:35,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:35,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517529069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:35,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:35,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:27:35,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592541110] [2021-07-13 20:27:35,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:27:35,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:35,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:27:35,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:27:35,126 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:35,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:35,740 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-07-13 20:27:35,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:27:35,741 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:27:35,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:35,746 INFO L225 Difference]: With dead ends: 2677 [2021-07-13 20:27:35,746 INFO L226 Difference]: Without dead ends: 2677 [2021-07-13 20:27:35,747 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 354.3ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:27:35,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-07-13 20:27:35,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-07-13 20:27:35,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:35,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-07-13 20:27:35,774 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-07-13 20:27:35,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:35,774 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-07-13 20:27:35,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:35,775 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-07-13 20:27:35,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:27:35,776 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:35,776 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:35,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-07-13 20:27:35,993 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:35,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:35,994 INFO L82 PathProgramCache]: Analyzing trace with hash -134613765, now seen corresponding path program 17 times [2021-07-13 20:27:35,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:35,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608601783] [2021-07-13 20:27:35,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:35,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:36,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:36,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:36,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608601783] [2021-07-13 20:27:36,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608601783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:36,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961660458] [2021-07-13 20:27:36,035 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 [2021-07-13 20:27:36,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:27:36,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:36,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:27:36,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:36,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:36,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961660458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:36,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:36,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:27:36,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028378335] [2021-07-13 20:27:36,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:27:36,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:36,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:27:36,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:27:36,123 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:36,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:36,631 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-07-13 20:27:36,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:27:36,632 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:27:36,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:36,637 INFO L225 Difference]: With dead ends: 2474 [2021-07-13 20:27:36,637 INFO L226 Difference]: Without dead ends: 2470 [2021-07-13 20:27:36,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 292.4ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:27:36,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-07-13 20:27:36,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-07-13 20:27:36,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:36,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-07-13 20:27:36,662 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-07-13 20:27:36,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:36,662 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-07-13 20:27:36,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:36,662 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-07-13 20:27:36,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:27:36,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:36,664 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:36,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:36,884 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:36,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:36,885 INFO L82 PathProgramCache]: Analyzing trace with hash 796043451, now seen corresponding path program 18 times [2021-07-13 20:27:36,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:36,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647695896] [2021-07-13 20:27:36,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:36,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:36,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:36,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647695896] [2021-07-13 20:27:36,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647695896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:36,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661223928] [2021-07-13 20:27:36,918 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 [2021-07-13 20:27:36,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:27:36,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:36,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:27:36,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:37,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:37,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661223928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:37,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:37,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:27:37,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094581890] [2021-07-13 20:27:37,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:27:37,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:37,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:27:37,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:27:37,031 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:37,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:37,674 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-07-13 20:27:37,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:27:37,674 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:27:37,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:37,680 INFO L225 Difference]: With dead ends: 2514 [2021-07-13 20:27:37,680 INFO L226 Difference]: Without dead ends: 2514 [2021-07-13 20:27:37,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 373.1ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:27:37,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-07-13 20:27:37,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-07-13 20:27:37,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:37,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-07-13 20:27:37,709 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-07-13 20:27:37,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:37,709 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-07-13 20:27:37,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:37,709 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-07-13 20:27:37,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:27:37,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:37,711 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:37,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-13 20:27:37,925 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:37,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:37,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1855884691, now seen corresponding path program 19 times [2021-07-13 20:27:37,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:37,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7588979] [2021-07-13 20:27:37,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:37,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:37,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:37,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:37,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7588979] [2021-07-13 20:27:37,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7588979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:37,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636906477] [2021-07-13 20:27:37,967 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 [2021-07-13 20:27:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:37,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:27:37,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:38,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:38,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636906477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:38,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:38,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:27:38,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867748889] [2021-07-13 20:27:38,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:27:38,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:38,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:27:38,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:27:38,066 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:38,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:38,635 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-07-13 20:27:38,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:27:38,636 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:27:38,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:38,641 INFO L225 Difference]: With dead ends: 2332 [2021-07-13 20:27:38,641 INFO L226 Difference]: Without dead ends: 2328 [2021-07-13 20:27:38,641 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 315.8ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:27:38,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-07-13 20:27:38,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-07-13 20:27:38,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:38,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-07-13 20:27:38,664 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-07-13 20:27:38,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:38,664 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-07-13 20:27:38,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:38,664 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-07-13 20:27:38,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:27:38,666 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:38,666 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:38,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-13 20:27:38,881 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:38,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:38,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1526797053, now seen corresponding path program 3 times [2021-07-13 20:27:38,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:38,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254258727] [2021-07-13 20:27:38,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:38,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:38,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:27:38,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:38,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254258727] [2021-07-13 20:27:38,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254258727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:38,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628988068] [2021-07-13 20:27:38,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:38,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:27:38,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:38,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:27:38,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:38,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:27:38,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628988068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:38,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:38,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:27:38,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142185295] [2021-07-13 20:27:38,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:27:38,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:38,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:27:38,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:27:38,977 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:39,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:39,077 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-07-13 20:27:39,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:27:39,077 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:27:39,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:39,079 INFO L225 Difference]: With dead ends: 929 [2021-07-13 20:27:39,079 INFO L226 Difference]: Without dead ends: 929 [2021-07-13 20:27:39,079 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:27:39,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-07-13 20:27:39,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-07-13 20:27:39,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:39,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-07-13 20:27:39,091 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-07-13 20:27:39,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:39,092 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-07-13 20:27:39,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:39,092 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-07-13 20:27:39,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:27:39,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:39,093 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:39,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:39,313 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:39,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:39,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1837970499, now seen corresponding path program 20 times [2021-07-13 20:27:39,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:39,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501833887] [2021-07-13 20:27:39,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:39,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:39,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:39,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:39,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501833887] [2021-07-13 20:27:39,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501833887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:39,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345973127] [2021-07-13 20:27:39,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:39,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:27:39,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:39,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:27:39,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:39,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:39,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345973127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:39,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:39,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:27:39,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463434917] [2021-07-13 20:27:39,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:27:39,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:39,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:27:39,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:27:39,417 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:39,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:39,664 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-07-13 20:27:39,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:27:39,665 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:27:39,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:39,669 INFO L225 Difference]: With dead ends: 1555 [2021-07-13 20:27:39,669 INFO L226 Difference]: Without dead ends: 1555 [2021-07-13 20:27:39,670 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 141.4ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:27:39,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-07-13 20:27:39,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-07-13 20:27:39,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:39,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-07-13 20:27:39,695 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-07-13 20:27:39,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:39,695 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-07-13 20:27:39,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:39,696 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-07-13 20:27:39,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:27:39,697 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:39,697 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:39,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-13 20:27:39,913 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:39,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:39,913 INFO L82 PathProgramCache]: Analyzing trace with hash 64708953, now seen corresponding path program 21 times [2021-07-13 20:27:39,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:39,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727388723] [2021-07-13 20:27:39,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:39,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:39,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:39,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:39,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727388723] [2021-07-13 20:27:39,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727388723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:39,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404980539] [2021-07-13 20:27:39,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:39,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:27:39,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:39,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:27:39,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:40,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:40,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404980539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:40,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:40,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 20:27:40,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454659904] [2021-07-13 20:27:40,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:27:40,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:40,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:27:40,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:27:40,012 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:40,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:40,264 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-07-13 20:27:40,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:27:40,264 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:27:40,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:40,266 INFO L225 Difference]: With dead ends: 1605 [2021-07-13 20:27:40,266 INFO L226 Difference]: Without dead ends: 1605 [2021-07-13 20:27:40,267 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 142.3ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:27:40,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-07-13 20:27:40,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-07-13 20:27:40,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:40,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-07-13 20:27:40,282 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-07-13 20:27:40,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:40,282 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-07-13 20:27:40,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:40,282 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-07-13 20:27:40,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:27:40,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:40,284 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:40,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:40,500 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:40,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:40,500 INFO L82 PathProgramCache]: Analyzing trace with hash 19887811, now seen corresponding path program 22 times [2021-07-13 20:27:40,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:40,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783957643] [2021-07-13 20:27:40,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:40,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:40,526 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:27:40,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:40,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783957643] [2021-07-13 20:27:40,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783957643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:40,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513922850] [2021-07-13 20:27:40,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:40,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:27:40,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:40,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:27:40,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:40,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:27:40,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513922850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:40,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:40,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 20:27:40,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198823372] [2021-07-13 20:27:40,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:27:40,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:40,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:27:40,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:27:40,592 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:40,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:40,773 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-07-13 20:27:40,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:27:40,774 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:27:40,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:40,776 INFO L225 Difference]: With dead ends: 1524 [2021-07-13 20:27:40,776 INFO L226 Difference]: Without dead ends: 1520 [2021-07-13 20:27:40,776 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 97.6ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:27:40,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-07-13 20:27:40,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-07-13 20:27:40,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:40,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-07-13 20:27:40,791 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-07-13 20:27:40,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:40,791 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-07-13 20:27:40,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:40,791 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-07-13 20:27:40,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:27:40,792 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:40,792 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:40,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-07-13 20:27:40,993 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:40,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:40,993 INFO L82 PathProgramCache]: Analyzing trace with hash 617224469, now seen corresponding path program 23 times [2021-07-13 20:27:40,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:40,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788452854] [2021-07-13 20:27:40,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:40,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:41,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:41,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:41,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788452854] [2021-07-13 20:27:41,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788452854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:41,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778803404] [2021-07-13 20:27:41,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:41,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:27:41,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:41,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:27:41,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:41,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:41,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778803404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:41,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:41,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:27:41,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920307717] [2021-07-13 20:27:41,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:27:41,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:41,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:27:41,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:27:41,093 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:41,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:41,296 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-07-13 20:27:41,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:27:41,296 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:27:41,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:41,298 INFO L225 Difference]: With dead ends: 1508 [2021-07-13 20:27:41,298 INFO L226 Difference]: Without dead ends: 1496 [2021-07-13 20:27:41,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 119.2ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:27:41,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-07-13 20:27:41,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-07-13 20:27:41,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:41,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-07-13 20:27:41,314 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-07-13 20:27:41,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:41,314 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-07-13 20:27:41,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:41,314 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-07-13 20:27:41,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:27:41,316 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:41,316 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:41,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:41,518 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:41,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:41,518 INFO L82 PathProgramCache]: Analyzing trace with hash 90804185, now seen corresponding path program 24 times [2021-07-13 20:27:41,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:41,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418561531] [2021-07-13 20:27:41,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:41,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:41,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:41,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418561531] [2021-07-13 20:27:41,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418561531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:41,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928624089] [2021-07-13 20:27:41,545 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:41,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:27:41,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:41,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:27:41,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:41,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:41,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928624089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:41,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:41,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:27:41,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275081345] [2021-07-13 20:27:41,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:27:41,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:41,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:27:41,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:27:41,658 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:42,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:42,117 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-07-13 20:27:42,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:27:42,117 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:27:42,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:42,121 INFO L225 Difference]: With dead ends: 2412 [2021-07-13 20:27:42,121 INFO L226 Difference]: Without dead ends: 2412 [2021-07-13 20:27:42,122 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 296.6ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:27:42,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-07-13 20:27:42,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-07-13 20:27:42,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:42,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-07-13 20:27:42,143 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-07-13 20:27:42,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:42,143 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-07-13 20:27:42,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:42,143 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-07-13 20:27:42,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:27:42,145 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:42,145 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:42,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-07-13 20:27:42,356 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:42,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:42,356 INFO L82 PathProgramCache]: Analyzing trace with hash 657756265, now seen corresponding path program 25 times [2021-07-13 20:27:42,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:42,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920117666] [2021-07-13 20:27:42,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:42,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:42,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:42,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:42,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920117666] [2021-07-13 20:27:42,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920117666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:42,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166758936] [2021-07-13 20:27:42,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:42,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:27:42,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:42,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166758936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:42,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:42,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:27:42,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044672325] [2021-07-13 20:27:42,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:27:42,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:42,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:27:42,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:27:42,490 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:42,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:42,906 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-07-13 20:27:42,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:27:42,906 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:27:42,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:42,910 INFO L225 Difference]: With dead ends: 2335 [2021-07-13 20:27:42,910 INFO L226 Difference]: Without dead ends: 2335 [2021-07-13 20:27:42,911 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 264.7ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:27:42,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-07-13 20:27:42,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-07-13 20:27:42,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:42,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-13 20:27:42,930 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-13 20:27:42,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:42,930 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-13 20:27:42,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:42,930 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-13 20:27:42,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:27:42,932 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:42,932 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:43,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:43,141 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:43,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:43,141 INFO L82 PathProgramCache]: Analyzing trace with hash -514589593, now seen corresponding path program 26 times [2021-07-13 20:27:43,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:43,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393010922] [2021-07-13 20:27:43,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:43,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:43,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:43,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:43,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393010922] [2021-07-13 20:27:43,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393010922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:43,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516251031] [2021-07-13 20:27:43,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:43,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:27:43,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:43,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:27:43,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:43,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:43,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516251031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:43,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:43,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:27:43,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572880451] [2021-07-13 20:27:43,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:27:43,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:43,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:27:43,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:27:43,259 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:43,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:43,652 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-07-13 20:27:43,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:27:43,654 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:27:43,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:43,657 INFO L225 Difference]: With dead ends: 2285 [2021-07-13 20:27:43,658 INFO L226 Difference]: Without dead ends: 2285 [2021-07-13 20:27:43,658 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 240.5ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:27:43,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-07-13 20:27:43,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-07-13 20:27:43,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:43,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-07-13 20:27:43,678 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-07-13 20:27:43,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:43,678 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-07-13 20:27:43,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:43,678 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-07-13 20:27:43,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:27:43,679 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:43,679 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:43,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-07-13 20:27:43,886 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:43,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:43,886 INFO L82 PathProgramCache]: Analyzing trace with hash -433213505, now seen corresponding path program 27 times [2021-07-13 20:27:43,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:43,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166286992] [2021-07-13 20:27:43,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:43,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:43,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:43,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166286992] [2021-07-13 20:27:43,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166286992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:43,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431738233] [2021-07-13 20:27:43,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:43,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:27:43,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:43,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:27:43,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:44,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:44,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431738233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:44,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:44,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:27:44,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559257036] [2021-07-13 20:27:44,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:27:44,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:44,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:27:44,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:27:44,003 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:44,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:44,327 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-07-13 20:27:44,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:27:44,327 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:27:44,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:44,330 INFO L225 Difference]: With dead ends: 2176 [2021-07-13 20:27:44,330 INFO L226 Difference]: Without dead ends: 2172 [2021-07-13 20:27:44,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 192.4ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:27:44,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-07-13 20:27:44,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-07-13 20:27:44,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:44,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-13 20:27:44,358 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-13 20:27:44,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:44,359 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-13 20:27:44,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:44,359 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-13 20:27:44,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:27:44,360 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:44,360 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:44,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:44,565 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:44,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:44,565 INFO L82 PathProgramCache]: Analyzing trace with hash 497443711, now seen corresponding path program 28 times [2021-07-13 20:27:44,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:44,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867218426] [2021-07-13 20:27:44,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:44,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:44,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:44,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:44,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867218426] [2021-07-13 20:27:44,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867218426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:44,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5922774] [2021-07-13 20:27:44,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:44,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:27:44,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:44,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:27:44,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:44,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:44,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5922774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:44,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:44,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:27:44,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042393887] [2021-07-13 20:27:44,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:27:44,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:44,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:27:44,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:27:44,684 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:45,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:45,007 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-07-13 20:27:45,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:27:45,008 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:27:45,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:45,011 INFO L225 Difference]: With dead ends: 2199 [2021-07-13 20:27:45,011 INFO L226 Difference]: Without dead ends: 2199 [2021-07-13 20:27:45,011 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 216.4ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:27:45,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-07-13 20:27:45,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-07-13 20:27:45,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:45,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-07-13 20:27:45,030 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-07-13 20:27:45,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:45,030 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-07-13 20:27:45,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:45,030 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-07-13 20:27:45,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:27:45,032 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:45,032 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:45,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-13 20:27:45,235 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:45,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:45,235 INFO L82 PathProgramCache]: Analyzing trace with hash 2140482865, now seen corresponding path program 29 times [2021-07-13 20:27:45,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:45,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878869118] [2021-07-13 20:27:45,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:45,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:45,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:45,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878869118] [2021-07-13 20:27:45,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878869118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:45,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897117616] [2021-07-13 20:27:45,268 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:45,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:27:45,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:45,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:27:45,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:45,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:45,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897117616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:45,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:45,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:27:45,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554786810] [2021-07-13 20:27:45,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:27:45,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:45,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:27:45,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:27:45,371 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:45,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:45,716 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-07-13 20:27:45,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:27:45,717 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:27:45,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:45,720 INFO L225 Difference]: With dead ends: 2156 [2021-07-13 20:27:45,721 INFO L226 Difference]: Without dead ends: 2152 [2021-07-13 20:27:45,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 228.1ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:27:45,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-07-13 20:27:45,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-07-13 20:27:45,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:45,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-13 20:27:45,740 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-13 20:27:45,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:45,740 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-13 20:27:45,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:45,741 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-13 20:27:45,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:27:45,742 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:45,742 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:45,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-13 20:27:45,958 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:45,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:45,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1151056447, now seen corresponding path program 30 times [2021-07-13 20:27:45,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:45,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675843619] [2021-07-13 20:27:45,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:45,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:45,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:45,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675843619] [2021-07-13 20:27:45,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675843619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:45,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416775683] [2021-07-13 20:27:45,992 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 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 [2021-07-13 20:27:46,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:27:46,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:46,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:27:46,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:46,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:46,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416775683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:46,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:46,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:27:46,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238070238] [2021-07-13 20:27:46,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:27:46,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:46,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:27:46,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:27:46,070 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:46,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:46,413 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-07-13 20:27:46,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:27:46,413 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:27:46,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:46,416 INFO L225 Difference]: With dead ends: 2097 [2021-07-13 20:27:46,417 INFO L226 Difference]: Without dead ends: 2097 [2021-07-13 20:27:46,417 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 194.4ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:27:46,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-07-13 20:27:46,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-07-13 20:27:46,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:46,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-07-13 20:27:46,435 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-07-13 20:27:46,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:46,435 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-07-13 20:27:46,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:46,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-07-13 20:27:46,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:27:46,437 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:46,437 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:46,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-13 20:27:46,640 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:46,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:46,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1069680359, now seen corresponding path program 31 times [2021-07-13 20:27:46,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:46,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997543574] [2021-07-13 20:27:46,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:46,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:46,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:46,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997543574] [2021-07-13 20:27:46,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997543574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:46,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103566204] [2021-07-13 20:27:46,667 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:46,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:46,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:27:46,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:46,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:46,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103566204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:46,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:46,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:27:46,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438721522] [2021-07-13 20:27:46,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:27:46,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:46,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:27:46,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:27:46,742 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:47,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:47,016 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-07-13 20:27:47,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:27:47,017 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:27:47,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:47,020 INFO L225 Difference]: With dead ends: 1963 [2021-07-13 20:27:47,020 INFO L226 Difference]: Without dead ends: 1959 [2021-07-13 20:27:47,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 155.6ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:27:47,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-07-13 20:27:47,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-07-13 20:27:47,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:47,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-07-13 20:27:47,040 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-07-13 20:27:47,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:47,040 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-07-13 20:27:47,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:47,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-07-13 20:27:47,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:27:47,042 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:47,043 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:47,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-13 20:27:47,259 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:47,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:47,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1710194965, now seen corresponding path program 32 times [2021-07-13 20:27:47,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:47,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639891850] [2021-07-13 20:27:47,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:47,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:47,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639891850] [2021-07-13 20:27:47,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639891850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:47,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442880791] [2021-07-13 20:27:47,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:47,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:27:47,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:47,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:27:47,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:47,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442880791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:47,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:47,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:27:47,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879234696] [2021-07-13 20:27:47,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:27:47,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:47,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:27:47,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:27:47,369 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:47,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:47,547 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-07-13 20:27:47,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:27:47,547 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:27:47,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:47,550 INFO L225 Difference]: With dead ends: 1728 [2021-07-13 20:27:47,550 INFO L226 Difference]: Without dead ends: 1716 [2021-07-13 20:27:47,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:27:47,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-07-13 20:27:47,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-07-13 20:27:47,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:47,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-07-13 20:27:47,566 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-07-13 20:27:47,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:47,566 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-07-13 20:27:47,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:47,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-07-13 20:27:47,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:27:47,568 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:47,568 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:47,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:47,768 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:47,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:47,769 INFO L82 PathProgramCache]: Analyzing trace with hash -987645615, now seen corresponding path program 33 times [2021-07-13 20:27:47,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:47,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130434122] [2021-07-13 20:27:47,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:47,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:47,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:47,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:47,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130434122] [2021-07-13 20:27:47,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130434122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:47,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626505496] [2021-07-13 20:27:47,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:47,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:27:47,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:47,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:27:47,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:47,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:47,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626505496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:47,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:47,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:27:47,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112788818] [2021-07-13 20:27:47,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:27:47,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:47,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:27:47,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:27:47,911 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:48,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:48,221 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-07-13 20:27:48,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:27:48,221 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:27:48,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:48,224 INFO L225 Difference]: With dead ends: 1821 [2021-07-13 20:27:48,224 INFO L226 Difference]: Without dead ends: 1821 [2021-07-13 20:27:48,224 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 193.7ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:27:48,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-07-13 20:27:48,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-07-13 20:27:48,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:48,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-07-13 20:27:48,242 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-07-13 20:27:48,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:48,242 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-07-13 20:27:48,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:48,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-07-13 20:27:48,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:27:48,244 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:48,244 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:48,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:48,457 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:48,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:48,457 INFO L82 PathProgramCache]: Analyzing trace with hash 655393539, now seen corresponding path program 34 times [2021-07-13 20:27:48,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:48,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262225548] [2021-07-13 20:27:48,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:48,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:48,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:48,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:48,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262225548] [2021-07-13 20:27:48,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262225548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:48,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005113923] [2021-07-13 20:27:48,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:48,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:27:48,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:48,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:27:48,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:48,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:48,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005113923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:48,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:48,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:27:48,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126176178] [2021-07-13 20:27:48,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:27:48,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:48,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:27:48,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:27:48,585 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:48,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:48,834 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-07-13 20:27:48,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:27:48,834 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:27:48,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:48,837 INFO L225 Difference]: With dead ends: 1790 [2021-07-13 20:27:48,837 INFO L226 Difference]: Without dead ends: 1786 [2021-07-13 20:27:48,837 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 156.4ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:27:48,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-07-13 20:27:48,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-07-13 20:27:48,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:48,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-07-13 20:27:48,854 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-07-13 20:27:48,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:48,854 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-07-13 20:27:48,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:48,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-07-13 20:27:48,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:27:48,856 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:48,856 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:49,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-07-13 20:27:49,061 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:49,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:49,061 INFO L82 PathProgramCache]: Analyzing trace with hash -612063639, now seen corresponding path program 35 times [2021-07-13 20:27:49,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:49,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98035876] [2021-07-13 20:27:49,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:49,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:49,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:49,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98035876] [2021-07-13 20:27:49,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98035876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:49,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304466185] [2021-07-13 20:27:49,093 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:49,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:27:49,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:49,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:27:49,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:49,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:49,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304466185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:49,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:49,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:27:49,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126267023] [2021-07-13 20:27:49,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:27:49,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:49,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:27:49,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:27:49,176 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:49,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:49,343 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-07-13 20:27:49,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:27:49,344 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:27:49,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:49,346 INFO L225 Difference]: With dead ends: 1649 [2021-07-13 20:27:49,346 INFO L226 Difference]: Without dead ends: 1637 [2021-07-13 20:27:49,347 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 90.5ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:27:49,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-07-13 20:27:49,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-07-13 20:27:49,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:49,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-07-13 20:27:49,363 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-07-13 20:27:49,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:49,363 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-07-13 20:27:49,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:49,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-07-13 20:27:49,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:27:49,365 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:49,365 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:49,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:49,577 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:49,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:49,578 INFO L82 PathProgramCache]: Analyzing trace with hash 2003913975, now seen corresponding path program 4 times [2021-07-13 20:27:49,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:49,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91420063] [2021-07-13 20:27:49,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:49,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:49,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:49,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:49,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91420063] [2021-07-13 20:27:49,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91420063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:49,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968433716] [2021-07-13 20:27:49,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:49,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:27:49,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:49,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:27:49,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:49,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:49,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:27:49,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-07-13 20:27:49,965 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:27:49,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:49,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:49,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:27:49,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:27:49,976 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:27:49,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:49,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:49,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-07-13 20:27:49,991 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:49,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:50,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:50,002 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-07-13 20:27:50,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:50,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968433716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:50,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:50,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:27:50,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266936022] [2021-07-13 20:27:50,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:27:50,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:50,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:27:50,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:27:50,017 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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) [2021-07-13 20:27:50,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:50,488 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-07-13 20:27:50,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:27:50,489 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 26 [2021-07-13 20:27:50,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:50,491 INFO L225 Difference]: With dead ends: 1517 [2021-07-13 20:27:50,491 INFO L226 Difference]: Without dead ends: 1502 [2021-07-13 20:27:50,491 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 491.5ms TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:27:50,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-07-13 20:27:50,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-07-13 20:27:50,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:50,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-07-13 20:27:50,507 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-07-13 20:27:50,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:50,507 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-07-13 20:27:50,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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) [2021-07-13 20:27:50,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-07-13 20:27:50,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:27:50,509 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:50,509 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:50,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:50,725 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:50,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:50,726 INFO L82 PathProgramCache]: Analyzing trace with hash -24484041, now seen corresponding path program 5 times [2021-07-13 20:27:50,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:50,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460116128] [2021-07-13 20:27:50,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:50,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:50,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:50,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:50,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460116128] [2021-07-13 20:27:50,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460116128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:50,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545991616] [2021-07-13 20:27:50,924 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:50,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:27:50,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:50,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:27:50,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:51,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:51,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:27:51,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-07-13 20:27:51,119 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:27:51,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:51,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:51,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:27:51,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:27:51,130 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:27:51,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:51,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:51,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-07-13 20:27:51,142 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:51,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:51,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:51,153 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-07-13 20:27:51,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:51,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545991616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:51,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:51,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:27:51,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131369351] [2021-07-13 20:27:51,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:27:51,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:51,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:27:51,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:27:51,175 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:51,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:51,646 INFO L93 Difference]: Finished difference Result 1495 states and 4899 transitions. [2021-07-13 20:27:51,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:27:51,646 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:27:51,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:51,648 INFO L225 Difference]: With dead ends: 1495 [2021-07-13 20:27:51,648 INFO L226 Difference]: Without dead ends: 1480 [2021-07-13 20:27:51,649 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 506.5ms TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:27:51,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-07-13 20:27:51,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1150. [2021-07-13 20:27:51,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:51,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-07-13 20:27:51,664 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-07-13 20:27:51,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:51,664 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-07-13 20:27:51,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:51,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-07-13 20:27:51,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:27:51,666 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:51,666 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:51,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:51,867 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:51,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:51,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1566945267, now seen corresponding path program 36 times [2021-07-13 20:27:51,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:51,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992692408] [2021-07-13 20:27:51,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:51,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:52,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:52,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:52,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992692408] [2021-07-13 20:27:52,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992692408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:52,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482275499] [2021-07-13 20:27:52,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:52,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:27:52,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:52,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:27:52,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:52,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:52,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:27:52,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:52,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:27:52,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 47 treesize of output 37 [2021-07-13 20:27:52,314 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:27:52,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:52,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:52,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:52,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:27:52,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:27:52,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 20:27:52,326 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:27:52,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:52,337 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:52,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-07-13 20:27:52,338 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:52,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:52,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:52,346 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-07-13 20:27:52,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:52,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482275499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:52,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:52,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-13 20:27:52,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108098602] [2021-07-13 20:27:52,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:27:52,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:52,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:27:52,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:27:52,360 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:54,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:54,015 INFO L93 Difference]: Finished difference Result 1650 states and 5321 transitions. [2021-07-13 20:27:54,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:27:54,015 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:27:54,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:54,018 INFO L225 Difference]: With dead ends: 1650 [2021-07-13 20:27:54,018 INFO L226 Difference]: Without dead ends: 1635 [2021-07-13 20:27:54,018 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1509.0ms TimeCoverageRelationStatistics Valid=311, Invalid=1495, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:27:54,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-07-13 20:27:54,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1180. [2021-07-13 20:27:54,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:54,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-07-13 20:27:54,034 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-07-13 20:27:54,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:54,034 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-07-13 20:27:54,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:54,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-07-13 20:27:54,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:27:54,036 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:54,036 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:54,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-07-13 20:27:54,236 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:54,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:54,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1922974853, now seen corresponding path program 6 times [2021-07-13 20:27:54,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:54,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778791848] [2021-07-13 20:27:54,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:54,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:54,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:54,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778791848] [2021-07-13 20:27:54,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778791848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:54,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149688150] [2021-07-13 20:27:54,426 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:54,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:27:54,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:54,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:27:54,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:54,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:54,596 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:54,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-07-13 20:27:54,616 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:27:54,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:54,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:54,630 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:54,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-07-13 20:27:54,651 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:27:54,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:54,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:54,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-07-13 20:27:54,699 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:27:54,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:54,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:54,754 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-07-13 20:27:54,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:54,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149688150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:54,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:54,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-13 20:27:54,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497364317] [2021-07-13 20:27:54,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:27:54,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:54,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:27:54,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:27:54,788 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) [2021-07-13 20:27:56,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:56,284 INFO L93 Difference]: Finished difference Result 1879 states and 5975 transitions. [2021-07-13 20:27:56,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:27:56,284 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 26 [2021-07-13 20:27:56,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:56,287 INFO L225 Difference]: With dead ends: 1879 [2021-07-13 20:27:56,287 INFO L226 Difference]: Without dead ends: 1864 [2021-07-13 20:27:56,288 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1171.7ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:27:56,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-07-13 20:27:56,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1198. [2021-07-13 20:27:56,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.346700083542189) internal successors, (4006), 1197 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:56,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-07-13 20:27:56,306 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-07-13 20:27:56,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:56,306 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-07-13 20:27:56,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) [2021-07-13 20:27:56,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-07-13 20:27:56,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:27:56,308 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:56,308 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:56,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:56,517 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:56,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:56,518 INFO L82 PathProgramCache]: Analyzing trace with hash -372593289, now seen corresponding path program 37 times [2021-07-13 20:27:56,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:56,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868088878] [2021-07-13 20:27:56,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:56,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:56,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:56,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868088878] [2021-07-13 20:27:56,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868088878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:56,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061436956] [2021-07-13 20:27:56,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:56,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:56,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:27:56,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:56,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:56,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:56,999 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:56,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 63 [2021-07-13 20:27:57,116 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:27:57,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:57,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:57,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:57,151 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:57,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 53 [2021-07-13 20:27:57,246 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:27:57,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:57,307 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:57,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-07-13 20:27:57,530 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:27:58,070 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 131 [2021-07-13 20:27:58,071 INFO L628 ElimStorePlain]: treesize reduction 164, result has 91.1 percent of original size [2021-07-13 20:27:58,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:58,448 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:58, output treesize:102 [2021-07-13 20:27:58,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:58,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061436956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:58,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:58,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:27:58,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810465519] [2021-07-13 20:27:58,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:27:58,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:58,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:27:58,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:27:58,495 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:59,049 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-07-13 20:27:59,803 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-07-13 20:28:00,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:00,463 INFO L93 Difference]: Finished difference Result 1814 states and 5791 transitions. [2021-07-13 20:28:00,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:28:00,464 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:28:00,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:00,467 INFO L225 Difference]: With dead ends: 1814 [2021-07-13 20:28:00,467 INFO L226 Difference]: Without dead ends: 1799 [2021-07-13 20:28:00,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1847.2ms TimeCoverageRelationStatistics Valid=360, Invalid=1710, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:28:00,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2021-07-13 20:28:00,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1206. [2021-07-13 20:28:00,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 3.349377593360996) internal successors, (4036), 1205 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:00,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-07-13 20:28:00,486 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-07-13 20:28:00,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:00,486 INFO L482 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-07-13 20:28:00,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:00,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-07-13 20:28:00,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:28:00,488 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:00,488 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:00,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:00,703 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:00,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:00,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1348912133, now seen corresponding path program 38 times [2021-07-13 20:28:00,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:00,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311911986] [2021-07-13 20:28:00,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:00,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:00,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311911986] [2021-07-13 20:28:00,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311911986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:00,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202853418] [2021-07-13 20:28:00,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:28:00,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:28:00,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:00,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:28:00,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:04,543 WARN L205 SmtUtils]: Spent 847.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-07-13 20:28:05,417 WARN L205 SmtUtils]: Spent 846.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-07-13 20:28:05,479 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:05,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 83 [2021-07-13 20:28:06,163 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:28:06,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:06,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:06,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 75 [2021-07-13 20:28:06,882 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:28:06,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:06,999 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:07,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-07-13 20:28:07,247 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:28:08,168 WARN L205 SmtUtils]: Spent 920.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 145 [2021-07-13 20:28:08,169 INFO L628 ElimStorePlain]: treesize reduction 536, result has 75.4 percent of original size [2021-07-13 20:28:09,065 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 227 [2021-07-13 20:28:10,413 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 205 [2021-07-13 20:28:10,593 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 205 [2021-07-13 20:28:10,785 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 213 [2021-07-13 20:28:11,620 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 211 [2021-07-13 20:28:11,759 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 211 [2021-07-13 20:28:11,920 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 221 [2021-07-13 20:28:12,252 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 296 [2021-07-13 20:28:13,114 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 263 [2021-07-13 20:28:13,225 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 263 [2021-07-13 20:28:13,334 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 237 [2021-07-13 20:28:14,663 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 469 [2021-07-13 20:28:15,134 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 469 [2021-07-13 20:28:15,732 WARN L205 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 558 DAG size of output: 502 [2021-07-13 20:28:15,892 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 318 [2021-07-13 20:28:16,355 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 196 [2021-07-13 20:28:16,835 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 295 [2021-07-13 20:28:17,559 WARN L205 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 447 [2021-07-13 20:28:18,201 WARN L205 SmtUtils]: Spent 639.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 447 [2021-07-13 20:28:19,723 WARN L205 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 511 DAG size of output: 493 [2021-07-13 20:28:20,282 WARN L205 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 399 [2021-07-13 20:28:20,966 WARN L205 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 365 [2021-07-13 20:28:20,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:20,972 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:65, output treesize:14812 [2021-07-13 20:28:21,661 WARN L205 SmtUtils]: Spent 688.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 365 [2021-07-13 20:28:22,006 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 365 [2021-07-13 20:28:22,352 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 365 [2021-07-13 20:28:22,693 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 365 [2021-07-13 20:28:23,829 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 359 DAG size of output: 57 [2021-07-13 20:28:23,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:23,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202853418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:23,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:23,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-13 20:28:23,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389621453] [2021-07-13 20:28:23,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:28:23,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:23,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:28:23,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=430, Unknown=2, NotChecked=0, Total=506 [2021-07-13 20:28:23,956 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 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) [2021-07-13 20:28:43,254 WARN L205 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-07-13 20:29:00,136 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-07-13 20:29:16,722 WARN L205 SmtUtils]: Spent 3.11 s on a formula simplification. DAG size of input: 109 DAG size of output: 59 [2021-07-13 20:29:20,667 WARN L205 SmtUtils]: Spent 2.97 s on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-07-13 20:29:31,990 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 59 [2021-07-13 20:29:32,928 WARN L205 SmtUtils]: Spent 885.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-07-13 20:29:38,758 WARN L205 SmtUtils]: Spent 932.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-07-13 20:29:40,285 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-07-13 20:29:40,538 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-07-13 20:29:40,686 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 44 [2021-07-13 20:29:40,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:40,771 INFO L93 Difference]: Finished difference Result 2218 states and 6997 transitions. [2021-07-13 20:29:40,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:29:40,771 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 26 [2021-07-13 20:29:40,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:40,776 INFO L225 Difference]: With dead ends: 2218 [2021-07-13 20:29:40,776 INFO L226 Difference]: Without dead ends: 2188 [2021-07-13 20:29:40,777 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 34009.8ms TimeCoverageRelationStatistics Valid=422, Invalid=2530, Unknown=18, NotChecked=0, Total=2970 [2021-07-13 20:29:40,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2021-07-13 20:29:40,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 1219. [2021-07-13 20:29:40,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 3.3505747126436782) internal successors, (4081), 1218 states have internal predecessors, (4081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:40,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 4081 transitions. [2021-07-13 20:29:40,798 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 4081 transitions. Word has length 26 [2021-07-13 20:29:40,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:40,798 INFO L482 AbstractCegarLoop]: Abstraction has 1219 states and 4081 transitions. [2021-07-13 20:29:40,798 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) [2021-07-13 20:29:40,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 4081 transitions. [2021-07-13 20:29:40,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:29:40,800 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:40,800 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:41,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-07-13 20:29:41,013 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:41,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:41,013 INFO L82 PathProgramCache]: Analyzing trace with hash 860987935, now seen corresponding path program 7 times [2021-07-13 20:29:41,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:41,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811650508] [2021-07-13 20:29:41,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:41,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:41,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:41,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:41,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811650508] [2021-07-13 20:29:41,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811650508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:41,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062148107] [2021-07-13 20:29:41,183 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 [2021-07-13 20:29:41,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:41,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:29:41,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:41,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:41,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:29:41,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 35 [2021-07-13 20:29:41,372 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:29:41,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:41,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:41,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:29:41,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 27 [2021-07-13 20:29:41,384 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:29:41,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:41,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:41,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-07-13 20:29:41,398 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:41,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:41,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:41,409 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-07-13 20:29:41,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:41,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062148107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:41,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:41,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:29:41,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245136776] [2021-07-13 20:29:41,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:29:41,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:41,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:29:41,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:29:41,423 INFO L87 Difference]: Start difference. First operand 1219 states and 4081 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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) [2021-07-13 20:29:41,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:41,957 INFO L93 Difference]: Finished difference Result 1622 states and 5290 transitions. [2021-07-13 20:29:41,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:29:41,958 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 26 [2021-07-13 20:29:41,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:41,960 INFO L225 Difference]: With dead ends: 1622 [2021-07-13 20:29:41,960 INFO L226 Difference]: Without dead ends: 1607 [2021-07-13 20:29:41,961 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 554.4ms TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:29:41,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-07-13 20:29:41,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1230. [2021-07-13 20:29:41,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 3.3474369406021154) internal successors, (4114), 1229 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:41,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 4114 transitions. [2021-07-13 20:29:41,977 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 4114 transitions. Word has length 26 [2021-07-13 20:29:41,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:41,977 INFO L482 AbstractCegarLoop]: Abstraction has 1230 states and 4114 transitions. [2021-07-13 20:29:41,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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) [2021-07-13 20:29:41,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 4114 transitions. [2021-07-13 20:29:41,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:29:41,979 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:41,979 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:42,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1667,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:42,197 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:42,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:42,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1167410081, now seen corresponding path program 8 times [2021-07-13 20:29:42,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:42,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196068627] [2021-07-13 20:29:42,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:42,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:42,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:42,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196068627] [2021-07-13 20:29:42,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196068627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:42,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811485462] [2021-07-13 20:29:42,363 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 [2021-07-13 20:29:42,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:29:42,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:42,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:29:42,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:42,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:42,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-07-13 20:29:42,596 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:29:42,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:42,623 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:42,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-07-13 20:29:42,663 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:29:42,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:42,708 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:42,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-07-13 20:29:42,717 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:29:42,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:42,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:42,831 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:102 [2021-07-13 20:29:42,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:42,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811485462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:42,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:42,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 20:29:42,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799278125] [2021-07-13 20:29:42,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:29:42,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:42,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:29:42,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:29:42,899 INFO L87 Difference]: Start difference. First operand 1230 states and 4114 transitions. Second operand has 18 states, 18 states have (on average 2.5) 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) [2021-07-13 20:29:43,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:43,873 INFO L93 Difference]: Finished difference Result 1684 states and 5459 transitions. [2021-07-13 20:29:43,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:29:43,874 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) 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 26 [2021-07-13 20:29:43,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:43,876 INFO L225 Difference]: With dead ends: 1684 [2021-07-13 20:29:43,877 INFO L226 Difference]: Without dead ends: 1669 [2021-07-13 20:29:43,877 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 885.4ms TimeCoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:29:43,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2021-07-13 20:29:43,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1233. [2021-07-13 20:29:43,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1232 states have (on average 3.3490259740259742) internal successors, (4126), 1232 states have internal predecessors, (4126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:43,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 4126 transitions. [2021-07-13 20:29:43,893 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 4126 transitions. Word has length 26 [2021-07-13 20:29:43,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:43,893 INFO L482 AbstractCegarLoop]: Abstraction has 1233 states and 4126 transitions. [2021-07-13 20:29:43,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) 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) [2021-07-13 20:29:43,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 4126 transitions. [2021-07-13 20:29:43,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:29:43,895 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:43,895 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:44,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1668 [2021-07-13 20:29:44,096 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:44,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:44,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1190147507, now seen corresponding path program 9 times [2021-07-13 20:29:44,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:44,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191019130] [2021-07-13 20:29:44,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:44,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:44,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:44,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:44,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191019130] [2021-07-13 20:29:44,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191019130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:44,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420050471] [2021-07-13 20:29:44,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:29:44,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:29:44,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:44,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:29:44,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:44,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:29:44,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:44,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 35 [2021-07-13 20:29:44,470 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:29:44,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:44,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:29:44,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:44,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:29:44,483 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:29:44,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:44,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:44,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-07-13 20:29:44,497 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:44,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:44,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:44,507 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:52, output treesize:3 [2021-07-13 20:29:44,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:44,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420050471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:44,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:44,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:29:44,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404653940] [2021-07-13 20:29:44,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:29:44,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:44,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:29:44,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:29:44,520 INFO L87 Difference]: Start difference. First operand 1233 states and 4126 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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) [2021-07-13 20:29:46,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:46,260 INFO L93 Difference]: Finished difference Result 1868 states and 6059 transitions. [2021-07-13 20:29:46,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:29:46,260 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 26 [2021-07-13 20:29:46,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:46,263 INFO L225 Difference]: With dead ends: 1868 [2021-07-13 20:29:46,263 INFO L226 Difference]: Without dead ends: 1853 [2021-07-13 20:29:46,264 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 633.0ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:29:46,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2021-07-13 20:29:46,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1242. [2021-07-13 20:29:46,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 1241 states have (on average 3.353746978243352) internal successors, (4162), 1241 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:46,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 4162 transitions. [2021-07-13 20:29:46,284 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 4162 transitions. Word has length 26 [2021-07-13 20:29:46,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:46,284 INFO L482 AbstractCegarLoop]: Abstraction has 1242 states and 4162 transitions. [2021-07-13 20:29:46,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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) [2021-07-13 20:29:46,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 4162 transitions. [2021-07-13 20:29:46,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:29:46,286 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:46,286 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:46,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1728,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:46,486 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:46,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:46,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1022338415, now seen corresponding path program 10 times [2021-07-13 20:29:46,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:46,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860725297] [2021-07-13 20:29:46,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:46,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:46,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:46,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:46,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860725297] [2021-07-13 20:29:46,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860725297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:46,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932992233] [2021-07-13 20:29:46,665 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 [2021-07-13 20:29:46,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:29:46,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:46,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:29:46,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:46,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:46,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:29:46,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-07-13 20:29:46,813 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:29:46,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:46,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:46,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:29:46,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:29:46,825 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:29:46,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:46,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:46,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-07-13 20:29:46,840 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:46,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:46,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:46,849 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-07-13 20:29:46,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:46,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932992233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:46,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:46,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 20:29:46,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697754758] [2021-07-13 20:29:46,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:29:46,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:46,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:29:46,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:29:46,867 INFO L87 Difference]: Start difference. First operand 1242 states and 4162 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-07-13 20:29:47,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:47,213 INFO L93 Difference]: Finished difference Result 1549 states and 5097 transitions. [2021-07-13 20:29:47,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:29:47,213 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 26 [2021-07-13 20:29:47,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:47,215 INFO L225 Difference]: With dead ends: 1549 [2021-07-13 20:29:47,215 INFO L226 Difference]: Without dead ends: 1534 [2021-07-13 20:29:47,216 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 396.5ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:29:47,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2021-07-13 20:29:47,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1238. [2021-07-13 20:29:47,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 3.3532740501212612) internal successors, (4148), 1237 states have internal predecessors, (4148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:47,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 4148 transitions. [2021-07-13 20:29:47,232 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 4148 transitions. Word has length 26 [2021-07-13 20:29:47,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:47,232 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 4148 transitions. [2021-07-13 20:29:47,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-07-13 20:29:47,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 4148 transitions. [2021-07-13 20:29:47,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:29:47,234 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:47,234 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:47,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1729,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:47,450 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:47,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:47,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1045177613, now seen corresponding path program 11 times [2021-07-13 20:29:47,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:47,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993860766] [2021-07-13 20:29:47,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:47,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:47,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:47,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:47,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993860766] [2021-07-13 20:29:47,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993860766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:47,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875896047] [2021-07-13 20:29:47,607 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 [2021-07-13 20:29:47,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:29:47,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:47,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:29:47,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:47,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:47,752 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:47,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-07-13 20:29:47,768 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:29:47,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:47,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:47,785 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:47,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-07-13 20:29:47,802 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:29:47,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:47,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:47,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-07-13 20:29:47,838 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:29:47,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:47,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:47,893 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:15 [2021-07-13 20:29:47,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:47,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875896047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:47,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:47,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:29:47,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590922799] [2021-07-13 20:29:47,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:29:47,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:47,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:29:47,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:29:47,930 INFO L87 Difference]: Start difference. First operand 1238 states and 4148 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:48,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:48,922 INFO L93 Difference]: Finished difference Result 2068 states and 6699 transitions. [2021-07-13 20:29:48,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:29:48,922 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:29:48,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:48,926 INFO L225 Difference]: With dead ends: 2068 [2021-07-13 20:29:48,926 INFO L226 Difference]: Without dead ends: 2053 [2021-07-13 20:29:48,926 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 813.0ms TimeCoverageRelationStatistics Valid=312, Invalid=1094, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:29:48,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2021-07-13 20:29:48,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1238. [2021-07-13 20:29:48,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 3.3532740501212612) internal successors, (4148), 1237 states have internal predecessors, (4148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:48,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 4148 transitions. [2021-07-13 20:29:48,947 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 4148 transitions. Word has length 26 [2021-07-13 20:29:48,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:48,947 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 4148 transitions. [2021-07-13 20:29:48,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:48,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 4148 transitions. [2021-07-13 20:29:48,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:29:48,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:48,949 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:49,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1730 [2021-07-13 20:29:49,153 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:49,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:49,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1541898973, now seen corresponding path program 12 times [2021-07-13 20:29:49,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:49,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493516301] [2021-07-13 20:29:49,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:49,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:49,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:49,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:49,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493516301] [2021-07-13 20:29:49,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493516301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:49,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379677879] [2021-07-13 20:29:49,394 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 [2021-07-13 20:29:49,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:29:49,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:49,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:29:49,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:49,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:49,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:49,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-07-13 20:29:49,568 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:29:49,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:49,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:49,608 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:49,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-07-13 20:29:49,627 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:29:49,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:49,656 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:49,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-07-13 20:29:49,661 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:29:49,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:49,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:49,718 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:24 [2021-07-13 20:29:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:49,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379677879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:49,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:49,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-13 20:29:49,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970945396] [2021-07-13 20:29:49,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:29:49,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:49,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:29:49,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:29:49,755 INFO L87 Difference]: Start difference. First operand 1238 states and 4148 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) [2021-07-13 20:29:51,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:51,137 INFO L93 Difference]: Finished difference Result 1885 states and 6123 transitions. [2021-07-13 20:29:51,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:29:51,137 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 26 [2021-07-13 20:29:51,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:51,141 INFO L225 Difference]: With dead ends: 1885 [2021-07-13 20:29:51,141 INFO L226 Difference]: Without dead ends: 1870 [2021-07-13 20:29:51,141 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1142.6ms TimeCoverageRelationStatistics Valid=312, Invalid=1410, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:29:51,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2021-07-13 20:29:51,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1238. [2021-07-13 20:29:51,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 3.3532740501212612) internal successors, (4148), 1237 states have internal predecessors, (4148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:51,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 4148 transitions. [2021-07-13 20:29:51,161 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 4148 transitions. Word has length 26 [2021-07-13 20:29:51,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:51,161 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 4148 transitions. [2021-07-13 20:29:51,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) [2021-07-13 20:29:51,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 4148 transitions. [2021-07-13 20:29:51,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:29:51,163 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:51,163 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:51,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1749,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:51,365 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:51,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:51,366 INFO L82 PathProgramCache]: Analyzing trace with hash -73165897, now seen corresponding path program 39 times [2021-07-13 20:29:51,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:51,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478471399] [2021-07-13 20:29:51,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:51,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:51,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:51,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:51,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478471399] [2021-07-13 20:29:51,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478471399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:51,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412181689] [2021-07-13 20:29:51,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:51,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:29:51,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:51,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:29:51,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:51,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:29:51,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:51,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:51,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:29:51,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-07-13 20:29:51,699 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:29:51,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:51,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:29:51,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:51,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:51,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:29:51,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 20:29:51,713 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:29:51,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:51,724 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:51,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-07-13 20:29:51,726 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:51,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:51,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:51,746 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-07-13 20:29:51,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:51,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412181689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:51,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:51,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-07-13 20:29:51,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122174775] [2021-07-13 20:29:51,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:29:51,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:51,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:29:51,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:29:51,768 INFO L87 Difference]: Start difference. First operand 1238 states and 4148 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-07-13 20:29:53,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:53,464 INFO L93 Difference]: Finished difference Result 2877 states and 8911 transitions. [2021-07-13 20:29:53,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:29:53,464 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-07-13 20:29:53,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:53,470 INFO L225 Difference]: With dead ends: 2877 [2021-07-13 20:29:53,470 INFO L226 Difference]: Without dead ends: 2832 [2021-07-13 20:29:53,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 1443.4ms TimeCoverageRelationStatistics Valid=545, Invalid=2535, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:29:53,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-07-13 20:29:53,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 1288. [2021-07-13 20:29:53,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.3737373737373737) internal successors, (4342), 1287 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:53,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4342 transitions. [2021-07-13 20:29:53,495 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4342 transitions. Word has length 26 [2021-07-13 20:29:53,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:53,495 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 4342 transitions. [2021-07-13 20:29:53,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-07-13 20:29:53,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4342 transitions. [2021-07-13 20:29:53,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:29:53,497 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:53,497 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:53,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1767 [2021-07-13 20:29:53,698 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:53,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:53,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1129146471, now seen corresponding path program 40 times [2021-07-13 20:29:53,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:53,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766256157] [2021-07-13 20:29:53,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:53,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:53,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:53,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:53,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766256157] [2021-07-13 20:29:53,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766256157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:53,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086185173] [2021-07-13 20:29:53,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:53,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:29:53,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:53,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:29:53,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:54,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:54,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:29:54,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:29:54,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-07-13 20:29:54,059 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:29:54,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:54,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:54,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:29:54,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:29:54,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 20:29:54,071 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:29:54,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:54,084 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:54,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-07-13 20:29:54,085 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:54,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:54,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:54,094 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-07-13 20:29:54,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:54,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086185173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:54,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:54,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-07-13 20:29:54,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056235240] [2021-07-13 20:29:54,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:29:54,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:54,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:29:54,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:29:54,112 INFO L87 Difference]: Start difference. First operand 1288 states and 4342 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-07-13 20:29:55,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:55,669 INFO L93 Difference]: Finished difference Result 2741 states and 8623 transitions. [2021-07-13 20:29:55,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:29:55,669 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-07-13 20:29:55,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:55,674 INFO L225 Difference]: With dead ends: 2741 [2021-07-13 20:29:55,675 INFO L226 Difference]: Without dead ends: 2696 [2021-07-13 20:29:55,675 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 1352.3ms TimeCoverageRelationStatistics Valid=485, Invalid=2065, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:29:55,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-07-13 20:29:55,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 1284. [2021-07-13 20:29:55,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 1283 states have (on average 3.38269680436477) internal successors, (4340), 1283 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:55,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 4340 transitions. [2021-07-13 20:29:55,699 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 4340 transitions. Word has length 26 [2021-07-13 20:29:55,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:55,699 INFO L482 AbstractCegarLoop]: Abstraction has 1284 states and 4340 transitions. [2021-07-13 20:29:55,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-07-13 20:29:55,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 4340 transitions. [2021-07-13 20:29:55,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:29:55,701 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:55,702 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:55,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1768,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:55,902 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:55,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:55,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1332172173, now seen corresponding path program 41 times [2021-07-13 20:29:55,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:55,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800595396] [2021-07-13 20:29:55,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:55,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:56,078 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:56,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:56,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800595396] [2021-07-13 20:29:56,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800595396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:56,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620352322] [2021-07-13 20:29:56,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:56,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:29:56,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:56,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:29:56,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:56,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:56,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:56,212 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:56,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 65 [2021-07-13 20:29:56,304 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:29:56,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:56,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:56,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:56,345 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:56,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-07-13 20:29:56,430 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:29:56,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:56,497 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:56,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-07-13 20:29:56,689 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:29:57,159 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 132 [2021-07-13 20:29:57,161 INFO L628 ElimStorePlain]: treesize reduction 198, result has 89.8 percent of original size [2021-07-13 20:29:57,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:57,477 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:38 [2021-07-13 20:29:57,514 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:57,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620352322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:57,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:57,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-07-13 20:29:57,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888994624] [2021-07-13 20:29:57,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:29:57,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:57,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:29:57,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:29:57,515 INFO L87 Difference]: Start difference. First operand 1284 states and 4340 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-07-13 20:29:59,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:59,673 INFO L93 Difference]: Finished difference Result 3022 states and 9448 transitions. [2021-07-13 20:29:59,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:29:59,674 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-07-13 20:29:59,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:59,679 INFO L225 Difference]: With dead ends: 3022 [2021-07-13 20:29:59,679 INFO L226 Difference]: Without dead ends: 2977 [2021-07-13 20:29:59,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1679.8ms TimeCoverageRelationStatistics Valid=567, Invalid=2295, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:29:59,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2977 states. [2021-07-13 20:29:59,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2977 to 1288. [2021-07-13 20:29:59,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.3885003885003884) internal successors, (4361), 1287 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:59,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4361 transitions. [2021-07-13 20:29:59,703 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4361 transitions. Word has length 26 [2021-07-13 20:29:59,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:59,704 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 4361 transitions. [2021-07-13 20:29:59,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-07-13 20:29:59,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4361 transitions. [2021-07-13 20:29:59,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:29:59,706 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:59,706 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:59,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1769 [2021-07-13 20:29:59,907 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:59,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:59,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1119783259, now seen corresponding path program 13 times [2021-07-13 20:29:59,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:59,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463773075] [2021-07-13 20:29:59,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:59,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:00,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:00,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:00,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463773075] [2021-07-13 20:30:00,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463773075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:00,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563929957] [2021-07-13 20:30:00,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:30:00,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:00,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:30:00,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:00,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:00,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:00,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-07-13 20:30:00,248 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:30:00,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:00,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:00,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:00,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:30:00,258 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:30:00,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:00,269 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:00,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-07-13 20:30:00,270 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:00,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:00,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:00,279 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-07-13 20:30:00,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:00,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563929957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:00,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:00,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:30:00,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716570181] [2021-07-13 20:30:00,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:30:00,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:00,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:30:00,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:30:00,292 INFO L87 Difference]: Start difference. First operand 1288 states and 4361 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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) [2021-07-13 20:30:00,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:00,759 INFO L93 Difference]: Finished difference Result 1650 states and 5461 transitions. [2021-07-13 20:30:00,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:30:00,759 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 26 [2021-07-13 20:30:00,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:00,762 INFO L225 Difference]: With dead ends: 1650 [2021-07-13 20:30:00,762 INFO L226 Difference]: Without dead ends: 1635 [2021-07-13 20:30:00,762 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 473.0ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:30:00,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-07-13 20:30:00,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1297. [2021-07-13 20:30:00,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.388117283950617) internal successors, (4391), 1296 states have internal predecessors, (4391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:00,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4391 transitions. [2021-07-13 20:30:00,779 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4391 transitions. Word has length 26 [2021-07-13 20:30:00,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:00,779 INFO L482 AbstractCegarLoop]: Abstraction has 1297 states and 4391 transitions. [2021-07-13 20:30:00,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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) [2021-07-13 20:30:00,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4391 transitions. [2021-07-13 20:30:00,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:30:00,781 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:00,781 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:00,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1893 [2021-07-13 20:30:00,981 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:00,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:00,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1448942831, now seen corresponding path program 14 times [2021-07-13 20:30:00,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:00,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677873762] [2021-07-13 20:30:00,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:00,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:01,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:01,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:01,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677873762] [2021-07-13 20:30:01,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677873762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:01,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736336804] [2021-07-13 20:30:01,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:01,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:30:01,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:01,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:30:01,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:01,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:01,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-07-13 20:30:01,388 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:30:01,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:01,417 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:01,417 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 35 treesize of output 43 [2021-07-13 20:30:01,452 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:30:01,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:01,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:01,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-07-13 20:30:01,519 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:30:01,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:01,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:01,647 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:75 [2021-07-13 20:30:01,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:01,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736336804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:01,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:01,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 20:30:01,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355801677] [2021-07-13 20:30:01,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:30:01,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:01,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:30:01,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:30:01,728 INFO L87 Difference]: Start difference. First operand 1297 states and 4391 transitions. Second operand has 18 states, 18 states have (on average 2.5) 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) [2021-07-13 20:30:02,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:03,000 INFO L93 Difference]: Finished difference Result 2002 states and 6515 transitions. [2021-07-13 20:30:03,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:30:03,000 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) 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 26 [2021-07-13 20:30:03,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:03,004 INFO L225 Difference]: With dead ends: 2002 [2021-07-13 20:30:03,004 INFO L226 Difference]: Without dead ends: 1987 [2021-07-13 20:30:03,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 963.6ms TimeCoverageRelationStatistics Valid=198, Invalid=1208, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:30:03,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2021-07-13 20:30:03,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1289. [2021-07-13 20:30:03,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1288 states have (on average 3.3975155279503104) internal successors, (4376), 1288 states have internal predecessors, (4376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:03,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 4376 transitions. [2021-07-13 20:30:03,025 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 4376 transitions. Word has length 26 [2021-07-13 20:30:03,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:03,025 INFO L482 AbstractCegarLoop]: Abstraction has 1289 states and 4376 transitions. [2021-07-13 20:30:03,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) 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) [2021-07-13 20:30:03,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 4376 transitions. [2021-07-13 20:30:03,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:30:03,027 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:03,027 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:03,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1894,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:03,229 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:03,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:03,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1281133739, now seen corresponding path program 15 times [2021-07-13 20:30:03,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:03,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625927877] [2021-07-13 20:30:03,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:03,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:03,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:03,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625927877] [2021-07-13 20:30:03,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625927877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:03,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3820196] [2021-07-13 20:30:03,430 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 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 [2021-07-13 20:30:03,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:30:03,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:03,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:30:03,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:04,744 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:04,745 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 43 treesize of output 59 [2021-07-13 20:30:04,819 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:30:04,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:04,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:04,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-07-13 20:30:04,947 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:30:04,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:05,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:05,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-07-13 20:30:05,008 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:30:05,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:05,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 16 xjuncts. [2021-07-13 20:30:05,200 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:59, output treesize:617 [2021-07-13 20:30:05,552 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2021-07-13 20:30:05,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:05,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3820196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:05,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:05,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-07-13 20:30:05,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774669744] [2021-07-13 20:30:05,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:30:05,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:05,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:30:05,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=292, Unknown=1, NotChecked=0, Total=342 [2021-07-13 20:30:05,720 INFO L87 Difference]: Start difference. First operand 1289 states and 4376 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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) [2021-07-13 20:30:08,104 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-07-13 20:30:09,630 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-07-13 20:30:14,667 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2021-07-13 20:30:14,831 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2021-07-13 20:30:14,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:14,883 INFO L93 Difference]: Finished difference Result 1952 states and 6311 transitions. [2021-07-13 20:30:14,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:30:14,884 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:30:14,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:14,887 INFO L225 Difference]: With dead ends: 1952 [2021-07-13 20:30:14,887 INFO L226 Difference]: Without dead ends: 1937 [2021-07-13 20:30:14,888 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 7019.8ms TimeCoverageRelationStatistics Valid=313, Invalid=1754, Unknown=3, NotChecked=0, Total=2070 [2021-07-13 20:30:14,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-07-13 20:30:14,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1302. [2021-07-13 20:30:14,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 3.4027671022290544) internal successors, (4427), 1301 states have internal predecessors, (4427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:14,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 4427 transitions. [2021-07-13 20:30:14,907 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 4427 transitions. Word has length 26 [2021-07-13 20:30:14,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:14,907 INFO L482 AbstractCegarLoop]: Abstraction has 1302 states and 4427 transitions. [2021-07-13 20:30:14,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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) [2021-07-13 20:30:14,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 4427 transitions. [2021-07-13 20:30:14,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:30:14,909 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:14,909 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:15,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1950 [2021-07-13 20:30:15,110 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:15,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:15,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1261165713, now seen corresponding path program 16 times [2021-07-13 20:30:15,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:15,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561216907] [2021-07-13 20:30:15,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:15,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:15,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:15,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:15,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561216907] [2021-07-13 20:30:15,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561216907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:15,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839768752] [2021-07-13 20:30:15,311 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 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 [2021-07-13 20:30:15,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:30:15,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:15,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:30:15,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:15,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:15,453 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:15,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-07-13 20:30:15,478 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:30:15,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:15,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:15,507 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:15,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-07-13 20:30:15,524 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:30:15,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:15,557 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:15,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-07-13 20:30:15,567 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:30:15,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:15,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:15,635 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:55, output treesize:17 [2021-07-13 20:30:15,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:15,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839768752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:15,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:15,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 20:30:15,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396369874] [2021-07-13 20:30:15,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:30:15,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:15,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:30:15,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:30:15,680 INFO L87 Difference]: Start difference. First operand 1302 states and 4427 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:16,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:16,110 INFO L93 Difference]: Finished difference Result 1783 states and 5883 transitions. [2021-07-13 20:30:16,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:30:16,110 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:30:16,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:16,113 INFO L225 Difference]: With dead ends: 1783 [2021-07-13 20:30:16,113 INFO L226 Difference]: Without dead ends: 1768 [2021-07-13 20:30:16,113 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 411.9ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:30:16,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2021-07-13 20:30:16,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1298. [2021-07-13 20:30:16,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 3.397070161912105) internal successors, (4406), 1297 states have internal predecessors, (4406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:16,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 4406 transitions. [2021-07-13 20:30:16,133 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 4406 transitions. Word has length 26 [2021-07-13 20:30:16,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:16,133 INFO L482 AbstractCegarLoop]: Abstraction has 1298 states and 4406 transitions. [2021-07-13 20:30:16,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:16,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 4406 transitions. [2021-07-13 20:30:16,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:30:16,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:16,135 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:16,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2048,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:16,341 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:16,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:16,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1283103649, now seen corresponding path program 17 times [2021-07-13 20:30:16,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:16,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974029258] [2021-07-13 20:30:16,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:16,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:16,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:16,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:16,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974029258] [2021-07-13 20:30:16,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974029258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:16,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066422868] [2021-07-13 20:30:16,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:16,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:30:16,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:16,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:30:16,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:16,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:16,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:16,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-07-13 20:30:16,794 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:30:16,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:16,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:16,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:16,803 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:30:16,805 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:30:16,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:16,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:16,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-07-13 20:30:16,821 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:16,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:16,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:16,830 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-07-13 20:30:16,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:16,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066422868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:16,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:16,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:30:16,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551897065] [2021-07-13 20:30:16,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:30:16,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:16,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:30:16,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:30:16,849 INFO L87 Difference]: Start difference. First operand 1298 states and 4406 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) 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) [2021-07-13 20:30:17,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:17,918 INFO L93 Difference]: Finished difference Result 1768 states and 5860 transitions. [2021-07-13 20:30:17,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:30:17,918 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) 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 26 [2021-07-13 20:30:17,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:17,921 INFO L225 Difference]: With dead ends: 1768 [2021-07-13 20:30:17,921 INFO L226 Difference]: Without dead ends: 1753 [2021-07-13 20:30:17,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 878.4ms TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:30:17,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2021-07-13 20:30:17,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 1301. [2021-07-13 20:30:17,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 1300 states have (on average 3.3984615384615386) internal successors, (4418), 1300 states have internal predecessors, (4418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:17,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 4418 transitions. [2021-07-13 20:30:17,940 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 4418 transitions. Word has length 26 [2021-07-13 20:30:17,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:17,940 INFO L482 AbstractCegarLoop]: Abstraction has 1301 states and 4418 transitions. [2021-07-13 20:30:17,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) 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) [2021-07-13 20:30:17,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 4418 transitions. [2021-07-13 20:30:17,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:30:17,942 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:17,942 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:18,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2067 [2021-07-13 20:30:18,142 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:18,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:18,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1394330867, now seen corresponding path program 18 times [2021-07-13 20:30:18,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:18,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538143170] [2021-07-13 20:30:18,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:18,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:18,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:18,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538143170] [2021-07-13 20:30:18,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538143170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:18,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806561357] [2021-07-13 20:30:18,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:18,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:30:18,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:18,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:30:18,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:18,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:18,531 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:18,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-07-13 20:30:18,548 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:30:18,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:18,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:18,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:18,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-07-13 20:30:18,582 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:30:18,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:18,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:18,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-07-13 20:30:18,619 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:30:18,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:18,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:18,672 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:36 [2021-07-13 20:30:18,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:18,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806561357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:18,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:18,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:30:18,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879995804] [2021-07-13 20:30:18,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:30:18,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:18,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:30:18,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:30:18,714 INFO L87 Difference]: Start difference. First operand 1301 states and 4418 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:19,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:19,487 INFO L93 Difference]: Finished difference Result 2171 states and 7095 transitions. [2021-07-13 20:30:19,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:30:19,488 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:30:19,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:19,491 INFO L225 Difference]: With dead ends: 2171 [2021-07-13 20:30:19,491 INFO L226 Difference]: Without dead ends: 2156 [2021-07-13 20:30:19,492 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 792.1ms TimeCoverageRelationStatistics Valid=261, Invalid=999, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:30:19,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2021-07-13 20:30:19,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 1295. [2021-07-13 20:30:19,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1294 states have (on average 3.3956723338485317) internal successors, (4394), 1294 states have internal predecessors, (4394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:19,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 4394 transitions. [2021-07-13 20:30:19,513 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 4394 transitions. Word has length 26 [2021-07-13 20:30:19,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:19,513 INFO L482 AbstractCegarLoop]: Abstraction has 1295 states and 4394 transitions. [2021-07-13 20:30:19,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:19,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 4394 transitions. [2021-07-13 20:30:19,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:30:19,515 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:19,515 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:19,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2068 [2021-07-13 20:30:19,716 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:19,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:19,716 INFO L82 PathProgramCache]: Analyzing trace with hash 911449975, now seen corresponding path program 19 times [2021-07-13 20:30:19,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:19,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97639871] [2021-07-13 20:30:19,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:19,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:19,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:19,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:19,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97639871] [2021-07-13 20:30:19,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97639871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:19,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564504469] [2021-07-13 20:30:19,898 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:30:19,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:19,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:19,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:20,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:20,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:20,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-07-13 20:30:20,077 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:30:20,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:20,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:20,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:20,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:30:20,087 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:30:20,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:20,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:20,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-07-13 20:30:20,101 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:20,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:20,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:20,110 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-07-13 20:30:20,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:20,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564504469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:20,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:20,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:30:20,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911634174] [2021-07-13 20:30:20,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:30:20,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:20,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:30:20,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:30:20,129 INFO L87 Difference]: Start difference. First operand 1295 states and 4394 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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) [2021-07-13 20:30:20,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:20,579 INFO L93 Difference]: Finished difference Result 1728 states and 5699 transitions. [2021-07-13 20:30:20,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:30:20,579 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 26 [2021-07-13 20:30:20,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:20,582 INFO L225 Difference]: With dead ends: 1728 [2021-07-13 20:30:20,582 INFO L226 Difference]: Without dead ends: 1707 [2021-07-13 20:30:20,583 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 462.4ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:30:20,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-07-13 20:30:20,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1336. [2021-07-13 20:30:20,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1335 states have (on average 3.390262172284644) internal successors, (4526), 1335 states have internal predecessors, (4526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:20,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 4526 transitions. [2021-07-13 20:30:20,600 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 4526 transitions. Word has length 26 [2021-07-13 20:30:20,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:20,600 INFO L482 AbstractCegarLoop]: Abstraction has 1336 states and 4526 transitions. [2021-07-13 20:30:20,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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) [2021-07-13 20:30:20,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 4526 transitions. [2021-07-13 20:30:20,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:30:20,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:20,602 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:20,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2087,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:20,803 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:20,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:20,803 INFO L82 PathProgramCache]: Analyzing trace with hash 743640883, now seen corresponding path program 20 times [2021-07-13 20:30:20,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:20,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404846701] [2021-07-13 20:30:20,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:20,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:20,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:20,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:20,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404846701] [2021-07-13 20:30:20,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404846701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:20,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611581477] [2021-07-13 20:30:20,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:21,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:30:21,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:21,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:30:21,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:21,173 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:21,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-07-13 20:30:21,207 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:30:21,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:21,235 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:21,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-07-13 20:30:21,273 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:30:21,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:21,317 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:21,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-07-13 20:30:21,321 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:30:21,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:21,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:21,418 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:184 [2021-07-13 20:30:21,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:21,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611581477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:21,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:21,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-07-13 20:30:21,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502211102] [2021-07-13 20:30:21,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:30:21,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:21,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:30:21,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:30:21,514 INFO L87 Difference]: Start difference. First operand 1336 states and 4526 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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) [2021-07-13 20:30:22,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:22,722 INFO L93 Difference]: Finished difference Result 1950 states and 6250 transitions. [2021-07-13 20:30:22,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:30:22,722 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:30:22,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:22,726 INFO L225 Difference]: With dead ends: 1950 [2021-07-13 20:30:22,726 INFO L226 Difference]: Without dead ends: 1925 [2021-07-13 20:30:22,726 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1098.3ms TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:30:22,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1925 states. [2021-07-13 20:30:22,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1925 to 1350. [2021-07-13 20:30:22,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 3.3995552260934025) internal successors, (4586), 1349 states have internal predecessors, (4586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:22,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 4586 transitions. [2021-07-13 20:30:22,747 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 4586 transitions. Word has length 26 [2021-07-13 20:30:22,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:22,747 INFO L482 AbstractCegarLoop]: Abstraction has 1350 states and 4586 transitions. [2021-07-13 20:30:22,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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) [2021-07-13 20:30:22,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 4586 transitions. [2021-07-13 20:30:22,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:30:22,749 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:22,749 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:22,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2088,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:22,966 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:22,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:22,966 INFO L82 PathProgramCache]: Analyzing trace with hash 723672857, now seen corresponding path program 21 times [2021-07-13 20:30:22,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:22,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660966081] [2021-07-13 20:30:22,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:22,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:23,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:23,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:23,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660966081] [2021-07-13 20:30:23,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660966081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:23,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157302740] [2021-07-13 20:30:23,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:23,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:30:23,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:23,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:30:23,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:23,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:23,361 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:23,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-07-13 20:30:23,379 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:30:23,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:23,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:23,398 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:23,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-07-13 20:30:23,415 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:30:23,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:23,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:23,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-07-13 20:30:23,451 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:30:23,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:23,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:23,504 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:52, output treesize:19 [2021-07-13 20:30:23,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:23,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157302740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:23,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:23,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 20:30:23,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232147025] [2021-07-13 20:30:23,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:30:23,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:23,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:30:23,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:30:23,544 INFO L87 Difference]: Start difference. First operand 1350 states and 4586 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) [2021-07-13 20:30:24,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:24,304 INFO L93 Difference]: Finished difference Result 1841 states and 6067 transitions. [2021-07-13 20:30:24,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:30:24,304 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 26 [2021-07-13 20:30:24,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:24,307 INFO L225 Difference]: With dead ends: 1841 [2021-07-13 20:30:24,308 INFO L226 Difference]: Without dead ends: 1812 [2021-07-13 20:30:24,308 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 723.6ms TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:30:24,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2021-07-13 20:30:24,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1353. [2021-07-13 20:30:24,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1352 states have (on average 3.400147928994083) internal successors, (4597), 1352 states have internal predecessors, (4597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:24,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 4597 transitions. [2021-07-13 20:30:24,327 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 4597 transitions. Word has length 26 [2021-07-13 20:30:24,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:24,327 INFO L482 AbstractCegarLoop]: Abstraction has 1353 states and 4597 transitions. [2021-07-13 20:30:24,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) [2021-07-13 20:30:24,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 4597 transitions. [2021-07-13 20:30:24,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:30:24,329 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:24,329 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:24,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2139 [2021-07-13 20:30:24,530 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:24,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:24,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1042414331, now seen corresponding path program 22 times [2021-07-13 20:30:24,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:24,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046526148] [2021-07-13 20:30:24,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:24,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:24,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:24,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:24,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046526148] [2021-07-13 20:30:24,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046526148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:24,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287258130] [2021-07-13 20:30:24,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:24,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:30:24,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:24,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:30:24,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:24,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:24,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:24,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-07-13 20:30:24,891 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:30:24,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:24,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:24,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:24,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 27 [2021-07-13 20:30:24,901 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:30:24,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:24,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:24,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-07-13 20:30:24,916 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:24,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:24,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:24,924 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-07-13 20:30:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:24,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287258130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:24,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:24,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 20:30:24,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059955524] [2021-07-13 20:30:24,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:30:24,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:24,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:30:24,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:30:24,942 INFO L87 Difference]: Start difference. First operand 1353 states and 4597 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-07-13 20:30:25,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:25,934 INFO L93 Difference]: Finished difference Result 1466 states and 4903 transitions. [2021-07-13 20:30:25,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:30:25,934 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 26 [2021-07-13 20:30:25,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:25,936 INFO L225 Difference]: With dead ends: 1466 [2021-07-13 20:30:25,936 INFO L226 Difference]: Without dead ends: 1451 [2021-07-13 20:30:25,936 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 320.7ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:30:25,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-07-13 20:30:25,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1359. [2021-07-13 20:30:25,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1358 states have (on average 3.402061855670103) internal successors, (4620), 1358 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:25,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 4620 transitions. [2021-07-13 20:30:25,953 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 4620 transitions. Word has length 26 [2021-07-13 20:30:25,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:25,953 INFO L482 AbstractCegarLoop]: Abstraction has 1359 states and 4620 transitions. [2021-07-13 20:30:25,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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) [2021-07-13 20:30:25,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 4620 transitions. [2021-07-13 20:30:25,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:30:25,957 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:25,957 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:26,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2158,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:26,158 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:26,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:26,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1681727365, now seen corresponding path program 23 times [2021-07-13 20:30:26,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:26,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744751342] [2021-07-13 20:30:26,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:26,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:26,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:26,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:26,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744751342] [2021-07-13 20:30:26,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744751342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:26,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435381097] [2021-07-13 20:30:26,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:26,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:30:26,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:26,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:30:26,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:27,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:27,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:27,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-07-13 20:30:27,775 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:30:27,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:27,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:27,793 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:27,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-07-13 20:30:27,809 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:30:27,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:27,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:27,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-07-13 20:30:27,846 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:30:27,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:27,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:27,900 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:52, output treesize:15 [2021-07-13 20:30:27,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:27,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435381097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:27,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:27,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:30:27,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538278113] [2021-07-13 20:30:27,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:30:27,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:27,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:30:27,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=278, Unknown=1, NotChecked=0, Total=342 [2021-07-13 20:30:27,938 INFO L87 Difference]: Start difference. First operand 1359 states and 4620 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:40,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:40,177 INFO L93 Difference]: Finished difference Result 1987 states and 6490 transitions. [2021-07-13 20:30:40,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:30:40,178 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:30:40,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:40,181 INFO L225 Difference]: With dead ends: 1987 [2021-07-13 20:30:40,182 INFO L226 Difference]: Without dead ends: 1937 [2021-07-13 20:30:40,182 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1871.4ms TimeCoverageRelationStatistics Valid=191, Invalid=864, Unknown=1, NotChecked=0, Total=1056 [2021-07-13 20:30:40,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-07-13 20:30:40,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1366. [2021-07-13 20:30:40,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1365 states have (on average 3.4065934065934065) internal successors, (4650), 1365 states have internal predecessors, (4650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:40,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 4650 transitions. [2021-07-13 20:30:40,201 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 4650 transitions. Word has length 26 [2021-07-13 20:30:40,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:40,202 INFO L482 AbstractCegarLoop]: Abstraction has 1366 states and 4650 transitions. [2021-07-13 20:30:40,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:40,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 4650 transitions. [2021-07-13 20:30:40,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:30:40,204 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:40,204 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:40,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2159 [2021-07-13 20:30:40,409 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:40,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:40,409 INFO L82 PathProgramCache]: Analyzing trace with hash 508379419, now seen corresponding path program 24 times [2021-07-13 20:30:40,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:40,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884632036] [2021-07-13 20:30:40,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:40,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:40,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:40,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:40,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884632036] [2021-07-13 20:30:40,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884632036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:40,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134271767] [2021-07-13 20:30:40,601 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 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 [2021-07-13 20:30:40,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:30:40,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:40,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:30:40,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:40,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:40,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:40,747 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:40,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 53 [2021-07-13 20:30:40,764 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:30:40,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:40,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:40,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:40,781 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:40,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2021-07-13 20:30:40,808 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:30:40,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:40,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:40,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 53 [2021-07-13 20:30:40,846 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:30:40,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:40,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:40,900 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:65, output treesize:17 [2021-07-13 20:30:40,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:40,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134271767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:40,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:40,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-13 20:30:40,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081944801] [2021-07-13 20:30:40,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:30:40,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:40,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:30:40,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:30:40,933 INFO L87 Difference]: Start difference. First operand 1366 states and 4650 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) [2021-07-13 20:30:41,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:41,656 INFO L93 Difference]: Finished difference Result 1843 states and 6121 transitions. [2021-07-13 20:30:41,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:30:41,656 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 26 [2021-07-13 20:30:41,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:41,660 INFO L225 Difference]: With dead ends: 1843 [2021-07-13 20:30:41,660 INFO L226 Difference]: Without dead ends: 1824 [2021-07-13 20:30:41,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 673.6ms TimeCoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:30:41,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2021-07-13 20:30:41,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1378. [2021-07-13 20:30:41,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 3.4095860566448803) internal successors, (4695), 1377 states have internal predecessors, (4695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:41,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 4695 transitions. [2021-07-13 20:30:41,679 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 4695 transitions. Word has length 26 [2021-07-13 20:30:41,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:41,679 INFO L482 AbstractCegarLoop]: Abstraction has 1378 states and 4695 transitions. [2021-07-13 20:30:41,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) [2021-07-13 20:30:41,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 4695 transitions. [2021-07-13 20:30:41,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:30:41,681 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:41,681 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:41,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2178 [2021-07-13 20:30:41,882 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:41,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:41,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1495871031, now seen corresponding path program 25 times [2021-07-13 20:30:41,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:41,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600321884] [2021-07-13 20:30:41,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:41,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:42,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:42,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:42,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600321884] [2021-07-13 20:30:42,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600321884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:42,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667104764] [2021-07-13 20:30:42,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:42,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:42,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:30:42,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:42,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:42,195 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:42,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-07-13 20:30:42,211 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:30:42,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:42,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:42,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:42,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-07-13 20:30:42,246 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:30:42,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:42,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:42,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-07-13 20:30:42,291 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:30:42,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:42,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:42,349 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:19 [2021-07-13 20:30:42,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:42,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667104764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:42,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:42,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:30:42,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361089812] [2021-07-13 20:30:42,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:30:42,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:42,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:30:42,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:30:42,387 INFO L87 Difference]: Start difference. First operand 1378 states and 4695 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:42,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:42,937 INFO L93 Difference]: Finished difference Result 1965 states and 6485 transitions. [2021-07-13 20:30:42,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:30:42,938 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:30:42,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:42,941 INFO L225 Difference]: With dead ends: 1965 [2021-07-13 20:30:42,941 INFO L226 Difference]: Without dead ends: 1940 [2021-07-13 20:30:42,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 502.6ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:30:42,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-07-13 20:30:42,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1378. [2021-07-13 20:30:42,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 3.4095860566448803) internal successors, (4695), 1377 states have internal predecessors, (4695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:42,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 4695 transitions. [2021-07-13 20:30:42,959 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 4695 transitions. Word has length 26 [2021-07-13 20:30:42,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:42,959 INFO L482 AbstractCegarLoop]: Abstraction has 1378 states and 4695 transitions. [2021-07-13 20:30:42,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:42,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 4695 transitions. [2021-07-13 20:30:42,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:30:42,961 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:42,961 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:43,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2195,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:43,162 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:43,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:43,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1425327497, now seen corresponding path program 42 times [2021-07-13 20:30:43,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:43,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900490333] [2021-07-13 20:30:43,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:43,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:43,372 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:43,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:43,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900490333] [2021-07-13 20:30:43,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900490333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:43,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040396384] [2021-07-13 20:30:43,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:43,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:30:43,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:43,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:30:43,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:43,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:43,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:43,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:43,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-07-13 20:30:43,533 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:30:43,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:43,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:43,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:43,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:43,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 20:30:43,544 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:30:43,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:43,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:43,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-07-13 20:30:43,556 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:43,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:43,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:43,564 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-07-13 20:30:43,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:43,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040396384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:43,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:43,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:30:43,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593386803] [2021-07-13 20:30:43,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:30:43,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:43,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:30:43,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:30:43,577 INFO L87 Difference]: Start difference. First operand 1378 states and 4695 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-07-13 20:30:44,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:44,519 INFO L93 Difference]: Finished difference Result 1798 states and 5944 transitions. [2021-07-13 20:30:44,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:30:44,520 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 26 [2021-07-13 20:30:44,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:44,523 INFO L225 Difference]: With dead ends: 1798 [2021-07-13 20:30:44,523 INFO L226 Difference]: Without dead ends: 1772 [2021-07-13 20:30:44,523 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 923.9ms TimeCoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:30:44,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2021-07-13 20:30:44,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1390. [2021-07-13 20:30:44,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.4046076313894886) internal successors, (4729), 1389 states have internal predecessors, (4729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:44,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 4729 transitions. [2021-07-13 20:30:44,541 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 4729 transitions. Word has length 26 [2021-07-13 20:30:44,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:44,541 INFO L482 AbstractCegarLoop]: Abstraction has 1390 states and 4729 transitions. [2021-07-13 20:30:44,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-07-13 20:30:44,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 4729 transitions. [2021-07-13 20:30:44,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:30:44,543 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:44,543 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:44,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2214,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:44,744 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:44,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:44,744 INFO L82 PathProgramCache]: Analyzing trace with hash -357452933, now seen corresponding path program 43 times [2021-07-13 20:30:44,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:44,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575077278] [2021-07-13 20:30:44,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:44,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:44,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:44,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:44,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575077278] [2021-07-13 20:30:44,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575077278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:44,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631179231] [2021-07-13 20:30:44,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:45,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:45,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:30:45,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:46,552 WARN L205 SmtUtils]: Spent 708.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-07-13 20:30:46,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:46,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:46,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:46,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 47 treesize of output 37 [2021-07-13 20:30:46,563 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:30:46,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:46,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:46,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:46,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:46,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 20:30:46,576 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:30:46,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:46,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:46,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-07-13 20:30:46,589 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:46,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:46,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:46,598 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-07-13 20:30:46,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:46,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631179231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:46,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:46,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-13 20:30:46,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265347814] [2021-07-13 20:30:46,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:30:46,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:46,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:30:46,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=216, Unknown=1, NotChecked=0, Total=272 [2021-07-13 20:30:46,616 INFO L87 Difference]: Start difference. First operand 1390 states and 4729 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:22,978 WARN L205 SmtUtils]: Spent 778.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-07-13 20:31:25,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:25,505 INFO L93 Difference]: Finished difference Result 1990 states and 6587 transitions. [2021-07-13 20:31:25,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:31:25,505 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:31:25,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:25,509 INFO L225 Difference]: With dead ends: 1990 [2021-07-13 20:31:25,509 INFO L226 Difference]: Without dead ends: 1975 [2021-07-13 20:31:25,509 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 9324.3ms TimeCoverageRelationStatistics Valid=336, Invalid=1378, Unknown=8, NotChecked=0, Total=1722 [2021-07-13 20:31:25,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2021-07-13 20:31:25,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1390. [2021-07-13 20:31:25,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.4046076313894886) internal successors, (4729), 1389 states have internal predecessors, (4729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:25,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 4729 transitions. [2021-07-13 20:31:25,528 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 4729 transitions. Word has length 26 [2021-07-13 20:31:25,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:25,528 INFO L482 AbstractCegarLoop]: Abstraction has 1390 states and 4729 transitions. [2021-07-13 20:31:25,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:25,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 4729 transitions. [2021-07-13 20:31:25,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:31:25,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:25,530 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:25,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2215 [2021-07-13 20:31:25,730 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:25,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:25,730 INFO L82 PathProgramCache]: Analyzing trace with hash -945828357, now seen corresponding path program 26 times [2021-07-13 20:31:25,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:25,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469668383] [2021-07-13 20:31:25,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:25,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:25,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:25,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:25,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469668383] [2021-07-13 20:31:25,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469668383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:25,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519222236] [2021-07-13 20:31:25,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:25,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:31:25,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:25,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:31:25,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:26,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:26,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:26,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 35 [2021-07-13 20:31:26,076 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:31:26,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:26,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:26,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:26,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:31:26,086 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:31:26,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:26,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:26,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-07-13 20:31:26,098 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:26,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:26,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:26,107 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-07-13 20:31:26,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:26,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519222236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:26,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:26,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:31:26,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869469488] [2021-07-13 20:31:26,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:31:26,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:26,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:31:26,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:31:26,123 INFO L87 Difference]: Start difference. First operand 1390 states and 4729 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:26,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:26,788 INFO L93 Difference]: Finished difference Result 1896 states and 6197 transitions. [2021-07-13 20:31:26,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:31:26,788 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:31:26,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:26,791 INFO L225 Difference]: With dead ends: 1896 [2021-07-13 20:31:26,791 INFO L226 Difference]: Without dead ends: 1881 [2021-07-13 20:31:26,791 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 636.8ms TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:31:26,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2021-07-13 20:31:26,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1401. [2021-07-13 20:31:26,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1401 states, 1400 states have (on average 3.405) internal successors, (4767), 1400 states have internal predecessors, (4767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:26,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1401 states to 1401 states and 4767 transitions. [2021-07-13 20:31:26,809 INFO L78 Accepts]: Start accepts. Automaton has 1401 states and 4767 transitions. Word has length 26 [2021-07-13 20:31:26,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:26,809 INFO L482 AbstractCegarLoop]: Abstraction has 1401 states and 4767 transitions. [2021-07-13 20:31:26,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:26,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1401 states and 4767 transitions. [2021-07-13 20:31:26,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:31:26,811 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:26,811 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:27,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2216,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:27,011 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:27,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:27,012 INFO L82 PathProgramCache]: Analyzing trace with hash 604553207, now seen corresponding path program 44 times [2021-07-13 20:31:27,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:27,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241472958] [2021-07-13 20:31:27,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:27,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:27,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:27,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:27,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241472958] [2021-07-13 20:31:27,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241472958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:27,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808842864] [2021-07-13 20:31:27,262 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 [2021-07-13 20:31:27,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:31:27,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:27,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:31:27,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:27,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:27,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 63 [2021-07-13 20:31:27,547 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:31:27,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:27,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:27,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:27,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 53 [2021-07-13 20:31:27,654 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:31:27,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:27,719 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:27,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-07-13 20:31:27,947 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:31:28,794 WARN L205 SmtUtils]: Spent 846.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 119 [2021-07-13 20:31:28,795 INFO L628 ElimStorePlain]: treesize reduction 426, result has 80.4 percent of original size [2021-07-13 20:31:28,958 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 149 [2021-07-13 20:31:29,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:29,187 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:58, output treesize:149 [2021-07-13 20:31:29,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:29,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808842864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:29,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:29,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:31:29,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406543673] [2021-07-13 20:31:29,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:31:29,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:29,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:31:29,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:31:29,247 INFO L87 Difference]: Start difference. First operand 1401 states and 4767 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:31,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:31,123 INFO L93 Difference]: Finished difference Result 2295 states and 7289 transitions. [2021-07-13 20:31:31,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:31:31,123 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:31:31,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:31,126 INFO L225 Difference]: With dead ends: 2295 [2021-07-13 20:31:31,127 INFO L226 Difference]: Without dead ends: 2251 [2021-07-13 20:31:31,127 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1595.0ms TimeCoverageRelationStatistics Valid=492, Invalid=2370, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:31:31,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2021-07-13 20:31:31,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 1408. [2021-07-13 20:31:31,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1407 states have (on average 3.405828002842928) internal successors, (4792), 1407 states have internal predecessors, (4792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:31,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 4792 transitions. [2021-07-13 20:31:31,147 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 4792 transitions. Word has length 26 [2021-07-13 20:31:31,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:31,147 INFO L482 AbstractCegarLoop]: Abstraction has 1408 states and 4792 transitions. [2021-07-13 20:31:31,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:31,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 4792 transitions. [2021-07-13 20:31:31,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:31:31,149 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:31,149 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:31,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2217 [2021-07-13 20:31:31,350 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:31,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:31,350 INFO L82 PathProgramCache]: Analyzing trace with hash -371765637, now seen corresponding path program 45 times [2021-07-13 20:31:31,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:31,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644478640] [2021-07-13 20:31:31,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:31,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:31,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:31,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:31,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644478640] [2021-07-13 20:31:31,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644478640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:31,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954674957] [2021-07-13 20:31:31,527 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 [2021-07-13 20:31:31,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:31:31,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:31,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:31:31,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:31,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,749 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-07-13 20:31:31,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 237 treesize of output 217 [2021-07-13 20:31:31,815 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:31:31,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:31,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:31,869 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-07-13 20:31:31,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 221 treesize of output 195 [2021-07-13 20:31:32,028 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:31:32,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:32,090 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:32,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 193 treesize of output 177 [2021-07-13 20:31:32,353 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:32,850 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 122 [2021-07-13 20:31:32,851 INFO L628 ElimStorePlain]: treesize reduction 242, result has 87.7 percent of original size [2021-07-13 20:31:33,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:33,229 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:245, output treesize:232 [2021-07-13 20:31:33,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:33,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954674957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:33,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:33,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-07-13 20:31:33,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500493911] [2021-07-13 20:31:33,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:31:33,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:33,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:31:33,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:31:33,292 INFO L87 Difference]: Start difference. First operand 1408 states and 4792 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) 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) [2021-07-13 20:31:34,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:34,733 INFO L93 Difference]: Finished difference Result 2489 states and 8040 transitions. [2021-07-13 20:31:34,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:31:34,734 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) 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 26 [2021-07-13 20:31:34,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:34,738 INFO L225 Difference]: With dead ends: 2489 [2021-07-13 20:31:34,738 INFO L226 Difference]: Without dead ends: 2474 [2021-07-13 20:31:34,738 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1264.4ms TimeCoverageRelationStatistics Valid=347, Invalid=1909, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:31:34,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-07-13 20:31:34,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 1418. [2021-07-13 20:31:34,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1418 states, 1417 states have (on average 3.4064925899788285) internal successors, (4827), 1417 states have internal predecessors, (4827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:34,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 4827 transitions. [2021-07-13 20:31:34,760 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 4827 transitions. Word has length 26 [2021-07-13 20:31:34,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:34,761 INFO L482 AbstractCegarLoop]: Abstraction has 1418 states and 4827 transitions. [2021-07-13 20:31:34,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) 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) [2021-07-13 20:31:34,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 4827 transitions. [2021-07-13 20:31:34,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:31:34,762 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:34,763 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:34,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2350,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:34,977 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:34,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:34,977 INFO L82 PathProgramCache]: Analyzing trace with hash 644042019, now seen corresponding path program 27 times [2021-07-13 20:31:34,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:34,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246043071] [2021-07-13 20:31:34,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:35,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:35,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:35,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246043071] [2021-07-13 20:31:35,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246043071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:35,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315489045] [2021-07-13 20:31:35,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:31:35,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:31:35,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:35,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:31:35,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:35,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:35,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:35,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 35 [2021-07-13 20:31:35,332 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:31:35,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:35,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:35,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:35,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:31:35,342 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:31:35,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:35,356 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:35,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-07-13 20:31:35,358 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:35,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:35,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:35,366 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-07-13 20:31:35,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:35,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315489045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:35,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:35,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:31:35,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248089515] [2021-07-13 20:31:35,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:31:35,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:35,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:31:35,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:31:35,386 INFO L87 Difference]: Start difference. First operand 1418 states and 4827 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:36,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:36,323 INFO L93 Difference]: Finished difference Result 2009 states and 6538 transitions. [2021-07-13 20:31:36,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:31:36,324 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:31:36,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:36,327 INFO L225 Difference]: With dead ends: 2009 [2021-07-13 20:31:36,327 INFO L226 Difference]: Without dead ends: 1994 [2021-07-13 20:31:36,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 740.4ms TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:31:36,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2021-07-13 20:31:36,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1423. [2021-07-13 20:31:36,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1423 states, 1422 states have (on average 3.407876230661041) internal successors, (4846), 1422 states have internal predecessors, (4846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:36,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 4846 transitions. [2021-07-13 20:31:36,346 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 4846 transitions. Word has length 26 [2021-07-13 20:31:36,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:36,347 INFO L482 AbstractCegarLoop]: Abstraction has 1423 states and 4846 transitions. [2021-07-13 20:31:36,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:36,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 4846 transitions. [2021-07-13 20:31:36,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:31:36,348 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:36,348 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:36,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2498 [2021-07-13 20:31:36,549 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:36,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:36,549 INFO L82 PathProgramCache]: Analyzing trace with hash -973490761, now seen corresponding path program 28 times [2021-07-13 20:31:36,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:36,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981663085] [2021-07-13 20:31:36,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:36,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:36,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:36,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981663085] [2021-07-13 20:31:36,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981663085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:36,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628347413] [2021-07-13 20:31:36,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:36,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:31:36,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:36,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:31:36,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:36,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:36,843 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:36,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-07-13 20:31:36,871 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:31:36,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:36,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:36,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:36,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-07-13 20:31:36,913 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:31:36,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:36,944 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:36,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-07-13 20:31:36,955 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:31:37,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:37,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:37,021 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:19 [2021-07-13 20:31:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:37,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628347413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:37,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:37,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:31:37,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204517870] [2021-07-13 20:31:37,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:31:37,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:37,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:31:37,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:31:37,057 INFO L87 Difference]: Start difference. First operand 1423 states and 4846 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:38,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:38,134 INFO L93 Difference]: Finished difference Result 2401 states and 7734 transitions. [2021-07-13 20:31:38,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:31:38,134 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:31:38,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:38,138 INFO L225 Difference]: With dead ends: 2401 [2021-07-13 20:31:38,138 INFO L226 Difference]: Without dead ends: 2382 [2021-07-13 20:31:38,139 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 797.2ms TimeCoverageRelationStatistics Valid=342, Invalid=1218, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:31:38,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2021-07-13 20:31:38,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 1416. [2021-07-13 20:31:38,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 3.4063604240282683) internal successors, (4820), 1415 states have internal predecessors, (4820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:38,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 4820 transitions. [2021-07-13 20:31:38,161 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 4820 transitions. Word has length 26 [2021-07-13 20:31:38,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:38,161 INFO L482 AbstractCegarLoop]: Abstraction has 1416 states and 4820 transitions. [2021-07-13 20:31:38,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:38,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 4820 transitions. [2021-07-13 20:31:38,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:31:38,163 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:38,163 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:38,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2499,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:38,364 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:38,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:38,364 INFO L82 PathProgramCache]: Analyzing trace with hash 830546731, now seen corresponding path program 46 times [2021-07-13 20:31:38,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:38,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549747321] [2021-07-13 20:31:38,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:38,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:38,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:38,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549747321] [2021-07-13 20:31:38,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549747321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:38,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647056428] [2021-07-13 20:31:38,533 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:31:38,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:31:38,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:38,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:31:38,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:38,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:38,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:38,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:38,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:38,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 47 treesize of output 37 [2021-07-13 20:31:38,688 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:31:38,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:38,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:38,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:38,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:38,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:38,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 20:31:38,700 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:31:38,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:38,711 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:38,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-07-13 20:31:38,712 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:38,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:38,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:38,721 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-07-13 20:31:38,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:38,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647056428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:38,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:38,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-07-13 20:31:38,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185999303] [2021-07-13 20:31:38,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:31:38,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:38,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:31:38,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:31:38,739 INFO L87 Difference]: Start difference. First operand 1416 states and 4820 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-07-13 20:31:40,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:40,229 INFO L93 Difference]: Finished difference Result 3014 states and 9632 transitions. [2021-07-13 20:31:40,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:31:40,229 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-07-13 20:31:40,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:40,235 INFO L225 Difference]: With dead ends: 3014 [2021-07-13 20:31:40,235 INFO L226 Difference]: Without dead ends: 2978 [2021-07-13 20:31:40,235 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1169.5ms TimeCoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:31:40,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2978 states. [2021-07-13 20:31:40,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2978 to 1549. [2021-07-13 20:31:40,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1549 states, 1548 states have (on average 3.4237726098191215) internal successors, (5300), 1548 states have internal predecessors, (5300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:40,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1549 states to 1549 states and 5300 transitions. [2021-07-13 20:31:40,265 INFO L78 Accepts]: Start accepts. Automaton has 1549 states and 5300 transitions. Word has length 26 [2021-07-13 20:31:40,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:40,265 INFO L482 AbstractCegarLoop]: Abstraction has 1549 states and 5300 transitions. [2021-07-13 20:31:40,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-07-13 20:31:40,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states and 5300 transitions. [2021-07-13 20:31:40,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:31:40,267 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:40,267 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:40,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2519,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:40,468 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:40,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:40,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1630771913, now seen corresponding path program 47 times [2021-07-13 20:31:40,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:40,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332232123] [2021-07-13 20:31:40,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:40,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:40,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:40,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332232123] [2021-07-13 20:31:40,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332232123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:40,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851976499] [2021-07-13 20:31:40,636 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 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 [2021-07-13 20:31:40,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:31:40,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:40,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:31:40,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:40,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:40,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:40,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:40,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 65 [2021-07-13 20:31:40,852 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:31:40,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:40,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:40,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:40,887 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:40,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-07-13 20:31:40,961 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:31:40,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:41,036 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:41,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-07-13 20:31:41,201 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:31:41,602 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2021-07-13 20:31:41,602 INFO L628 ElimStorePlain]: treesize reduction 248, result has 85.3 percent of original size [2021-07-13 20:31:41,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:41,819 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:48 [2021-07-13 20:31:41,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:41,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851976499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:41,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:41,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-07-13 20:31:41,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032741617] [2021-07-13 20:31:41,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:31:41,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:41,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:31:41,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:31:41,869 INFO L87 Difference]: Start difference. First operand 1549 states and 5300 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-07-13 20:31:43,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:43,621 INFO L93 Difference]: Finished difference Result 3396 states and 10730 transitions. [2021-07-13 20:31:43,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:31:43,622 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-07-13 20:31:43,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:43,628 INFO L225 Difference]: With dead ends: 3396 [2021-07-13 20:31:43,628 INFO L226 Difference]: Without dead ends: 3339 [2021-07-13 20:31:43,629 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1444.1ms TimeCoverageRelationStatistics Valid=512, Invalid=2038, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:31:43,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2021-07-13 20:31:43,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 1572. [2021-07-13 20:31:43,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1571 states have (on average 3.426479949077021) internal successors, (5383), 1571 states have internal predecessors, (5383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:43,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 5383 transitions. [2021-07-13 20:31:43,660 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 5383 transitions. Word has length 26 [2021-07-13 20:31:43,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:43,660 INFO L482 AbstractCegarLoop]: Abstraction has 1572 states and 5383 transitions. [2021-07-13 20:31:43,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-07-13 20:31:43,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 5383 transitions. [2021-07-13 20:31:43,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:31:43,662 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:43,662 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:43,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2520 [2021-07-13 20:31:43,863 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:43,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:43,863 INFO L82 PathProgramCache]: Analyzing trace with hash 219730783, now seen corresponding path program 29 times [2021-07-13 20:31:43,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:43,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671470023] [2021-07-13 20:31:43,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:43,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:44,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:44,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:44,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671470023] [2021-07-13 20:31:44,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671470023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:44,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589429952] [2021-07-13 20:31:44,019 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:44,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:31:44,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:44,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:31:44,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:44,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:44,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:44,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 35 [2021-07-13 20:31:44,254 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:31:44,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:44,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:44,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:44,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:31:44,265 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:31:44,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:44,277 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:44,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-07-13 20:31:44,278 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:44,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:44,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:44,288 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-07-13 20:31:44,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:44,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589429952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:44,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:44,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:31:44,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090286192] [2021-07-13 20:31:44,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:31:44,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:44,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:31:44,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:31:44,305 INFO L87 Difference]: Start difference. First operand 1572 states and 5383 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) 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) [2021-07-13 20:31:45,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:45,048 INFO L93 Difference]: Finished difference Result 1983 states and 6657 transitions. [2021-07-13 20:31:45,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:31:45,049 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) 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 26 [2021-07-13 20:31:45,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:45,052 INFO L225 Difference]: With dead ends: 1983 [2021-07-13 20:31:45,052 INFO L226 Difference]: Without dead ends: 1968 [2021-07-13 20:31:45,052 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 656.1ms TimeCoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:31:45,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-07-13 20:31:45,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1583. [2021-07-13 20:31:45,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 3.4260429835651074) internal successors, (5420), 1582 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:45,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 5420 transitions. [2021-07-13 20:31:45,073 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 5420 transitions. Word has length 26 [2021-07-13 20:31:45,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:45,073 INFO L482 AbstractCegarLoop]: Abstraction has 1583 states and 5420 transitions. [2021-07-13 20:31:45,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) 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) [2021-07-13 20:31:45,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 5420 transitions. [2021-07-13 20:31:45,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:31:45,075 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:45,076 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:45,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2633,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:45,292 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:45,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:45,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1397801997, now seen corresponding path program 30 times [2021-07-13 20:31:45,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:45,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244592933] [2021-07-13 20:31:45,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:45,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:45,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:45,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244592933] [2021-07-13 20:31:45,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244592933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:45,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539750286] [2021-07-13 20:31:45,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:45,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:31:45,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:45,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:31:45,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:45,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:45,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-07-13 20:31:45,630 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:31:45,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:45,659 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:45,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-07-13 20:31:45,692 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:31:45,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:45,735 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:45,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-07-13 20:31:45,745 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:31:45,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:45,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:45,867 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:165 [2021-07-13 20:31:45,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:45,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539750286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:45,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:45,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 20:31:45,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040697638] [2021-07-13 20:31:45,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:31:45,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:45,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:31:45,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:31:45,958 INFO L87 Difference]: Start difference. First operand 1583 states and 5420 transitions. Second operand has 18 states, 18 states have (on average 2.5) 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) [2021-07-13 20:31:47,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:47,496 INFO L93 Difference]: Finished difference Result 2815 states and 9082 transitions. [2021-07-13 20:31:47,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:31:47,496 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) 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 26 [2021-07-13 20:31:47,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:47,501 INFO L225 Difference]: With dead ends: 2815 [2021-07-13 20:31:47,501 INFO L226 Difference]: Without dead ends: 2777 [2021-07-13 20:31:47,501 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1169.2ms TimeCoverageRelationStatistics Valid=351, Invalid=1629, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:31:47,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2777 states. [2021-07-13 20:31:47,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2777 to 1586. [2021-07-13 20:31:47,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1586 states, 1585 states have (on average 3.4227129337539433) internal successors, (5425), 1585 states have internal predecessors, (5425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:47,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1586 states to 1586 states and 5425 transitions. [2021-07-13 20:31:47,528 INFO L78 Accepts]: Start accepts. Automaton has 1586 states and 5425 transitions. Word has length 26 [2021-07-13 20:31:47,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:47,528 INFO L482 AbstractCegarLoop]: Abstraction has 1586 states and 5425 transitions. [2021-07-13 20:31:47,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) 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) [2021-07-13 20:31:47,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1586 states and 5425 transitions. [2021-07-13 20:31:47,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:31:47,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:47,530 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:47,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2634 [2021-07-13 20:31:47,731 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:47,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:47,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1207222395, now seen corresponding path program 31 times [2021-07-13 20:31:47,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:47,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116783501] [2021-07-13 20:31:47,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:47,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:47,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:47,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116783501] [2021-07-13 20:31:47,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116783501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:47,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589746990] [2021-07-13 20:31:47,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:47,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:47,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:31:47,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:48,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:48,009 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:48,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-07-13 20:31:48,025 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:31:48,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:48,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:48,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:48,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-07-13 20:31:48,058 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:31:48,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:48,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:48,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-07-13 20:31:48,098 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:31:48,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:48,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:48,155 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:19 [2021-07-13 20:31:48,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:48,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589746990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:48,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:48,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:31:48,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088064546] [2021-07-13 20:31:48,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:31:48,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:48,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:31:48,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:31:48,192 INFO L87 Difference]: Start difference. First operand 1586 states and 5425 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:49,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:49,046 INFO L93 Difference]: Finished difference Result 2234 states and 7413 transitions. [2021-07-13 20:31:49,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:31:49,047 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:31:49,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:49,050 INFO L225 Difference]: With dead ends: 2234 [2021-07-13 20:31:49,050 INFO L226 Difference]: Without dead ends: 2209 [2021-07-13 20:31:49,051 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 615.6ms TimeCoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:31:49,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2021-07-13 20:31:49,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 1580. [2021-07-13 20:31:49,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 3.4243191893603546) internal successors, (5407), 1579 states have internal predecessors, (5407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:49,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 5407 transitions. [2021-07-13 20:31:49,072 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 5407 transitions. Word has length 26 [2021-07-13 20:31:49,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:49,072 INFO L482 AbstractCegarLoop]: Abstraction has 1580 states and 5407 transitions. [2021-07-13 20:31:49,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:49,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 5407 transitions. [2021-07-13 20:31:49,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:31:49,075 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:49,075 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:49,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2695 [2021-07-13 20:31:49,275 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:49,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:49,275 INFO L82 PathProgramCache]: Analyzing trace with hash -189976303, now seen corresponding path program 48 times [2021-07-13 20:31:49,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:49,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803157841] [2021-07-13 20:31:49,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:49,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:49,508 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:49,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:49,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803157841] [2021-07-13 20:31:49,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803157841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:49,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509629392] [2021-07-13 20:31:49,508 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 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 [2021-07-13 20:31:49,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:31:49,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:49,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:31:49,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:49,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:49,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:49,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:49,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 47 treesize of output 37 [2021-07-13 20:31:49,681 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:31:49,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:49,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:49,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:49,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:49,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 20:31:49,692 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:31:49,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:49,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:49,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-07-13 20:31:49,704 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:49,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:49,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:49,713 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-07-13 20:31:49,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:49,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509629392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:49,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:49,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:31:49,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149723061] [2021-07-13 20:31:49,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:31:49,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:49,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:31:49,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:31:49,726 INFO L87 Difference]: Start difference. First operand 1580 states and 5407 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-07-13 20:31:51,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:51,008 INFO L93 Difference]: Finished difference Result 2036 states and 6741 transitions. [2021-07-13 20:31:51,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:31:51,008 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 26 [2021-07-13 20:31:51,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:51,012 INFO L225 Difference]: With dead ends: 2036 [2021-07-13 20:31:51,012 INFO L226 Difference]: Without dead ends: 2014 [2021-07-13 20:31:51,012 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1222.9ms TimeCoverageRelationStatistics Valid=344, Invalid=1462, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:31:51,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2021-07-13 20:31:51,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1572. [2021-07-13 20:31:51,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1571 states have (on average 3.4239338001273074) internal successors, (5379), 1571 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:51,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 5379 transitions. [2021-07-13 20:31:51,035 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 5379 transitions. Word has length 26 [2021-07-13 20:31:51,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:51,035 INFO L482 AbstractCegarLoop]: Abstraction has 1572 states and 5379 transitions. [2021-07-13 20:31:51,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-07-13 20:31:51,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 5379 transitions. [2021-07-13 20:31:51,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:31:51,038 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:51,038 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:51,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2714,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:51,240 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:51,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:51,241 INFO L82 PathProgramCache]: Analyzing trace with hash 735517563, now seen corresponding path program 49 times [2021-07-13 20:31:51,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:51,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333639348] [2021-07-13 20:31:51,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:51,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:51,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:51,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:51,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333639348] [2021-07-13 20:31:51,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333639348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:51,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137688931] [2021-07-13 20:31:51,475 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 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 [2021-07-13 20:31:51,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:51,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:31:51,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:53,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:53,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:53,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:53,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:53,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 47 treesize of output 37 [2021-07-13 20:31:53,889 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:31:53,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:53,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:53,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:53,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:53,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:53,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 20:31:53,901 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:31:53,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:53,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:53,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-07-13 20:31:53,914 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:53,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:53,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:53,923 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-07-13 20:31:53,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:53,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137688931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:53,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:53,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-13 20:31:53,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026488175] [2021-07-13 20:31:53,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:31:53,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:53,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:31:53,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=212, Unknown=3, NotChecked=0, Total=272 [2021-07-13 20:31:53,942 INFO L87 Difference]: Start difference. First operand 1572 states and 5379 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:19,362 WARN L205 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 35 [2021-07-13 20:32:21,965 WARN L205 SmtUtils]: Spent 798.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-07-13 20:32:22,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:22,009 INFO L93 Difference]: Finished difference Result 2238 states and 7416 transitions. [2021-07-13 20:32:22,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:32:22,009 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:32:22,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:22,013 INFO L225 Difference]: With dead ends: 2238 [2021-07-13 20:32:22,013 INFO L226 Difference]: Without dead ends: 2223 [2021-07-13 20:32:22,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 15379.6ms TimeCoverageRelationStatistics Valid=421, Invalid=1635, Unknown=14, NotChecked=0, Total=2070 [2021-07-13 20:32:22,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2021-07-13 20:32:22,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 1572. [2021-07-13 20:32:22,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1571 states have (on average 3.4239338001273074) internal successors, (5379), 1571 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:22,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 5379 transitions. [2021-07-13 20:32:22,034 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 5379 transitions. Word has length 26 [2021-07-13 20:32:22,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:22,034 INFO L482 AbstractCegarLoop]: Abstraction has 1572 states and 5379 transitions. [2021-07-13 20:32:22,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:22,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 5379 transitions. [2021-07-13 20:32:22,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:32:22,037 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:22,037 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:22,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2715,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:22,247 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:22,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:22,247 INFO L82 PathProgramCache]: Analyzing trace with hash -442386977, now seen corresponding path program 50 times [2021-07-13 20:32:22,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:22,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978544968] [2021-07-13 20:32:22,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:22,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:22,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:22,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:22,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978544968] [2021-07-13 20:32:22,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978544968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:22,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96312050] [2021-07-13 20:32:22,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:32:22,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:32:22,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:22,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:32:22,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:22,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:22,629 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:22,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 73 [2021-07-13 20:32:22,781 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:32:22,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:22,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:22,824 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:22,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 63 [2021-07-13 20:32:22,985 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:32:23,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:23,061 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:23,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-07-13 20:32:23,295 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:32:23,815 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 126 [2021-07-13 20:32:23,816 INFO L628 ElimStorePlain]: treesize reduction 666, result has 70.8 percent of original size [2021-07-13 20:32:24,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:24,613 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:58, output treesize:20 [2021-07-13 20:32:24,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:24,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96312050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:24,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:24,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-07-13 20:32:24,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539576860] [2021-07-13 20:32:24,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:32:24,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:24,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:32:24,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:32:24,676 INFO L87 Difference]: Start difference. First operand 1572 states and 5379 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) 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) [2021-07-13 20:32:27,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:27,773 INFO L93 Difference]: Finished difference Result 2935 states and 9380 transitions. [2021-07-13 20:32:27,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:32:27,773 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) 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 26 [2021-07-13 20:32:27,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:27,778 INFO L225 Difference]: With dead ends: 2935 [2021-07-13 20:32:27,778 INFO L226 Difference]: Without dead ends: 2873 [2021-07-13 20:32:27,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1698 ImplicationChecksByTransitivity, 2617.1ms TimeCoverageRelationStatistics Valid=805, Invalid=4895, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 20:32:27,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2873 states. [2021-07-13 20:32:27,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2873 to 1625. [2021-07-13 20:32:27,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1624 states have (on average 3.4224137931034484) internal successors, (5558), 1624 states have internal predecessors, (5558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:27,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 5558 transitions. [2021-07-13 20:32:27,805 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 5558 transitions. Word has length 26 [2021-07-13 20:32:27,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:27,805 INFO L482 AbstractCegarLoop]: Abstraction has 1625 states and 5558 transitions. [2021-07-13 20:32:27,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) 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) [2021-07-13 20:32:27,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 5558 transitions. [2021-07-13 20:32:27,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:32:27,807 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:27,807 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:28,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2716,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:28,008 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:28,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:28,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1988624133, now seen corresponding path program 51 times [2021-07-13 20:32:28,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:28,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055271343] [2021-07-13 20:32:28,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:28,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:28,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:28,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:28,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055271343] [2021-07-13 20:32:28,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055271343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:28,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930747920] [2021-07-13 20:32:28,203 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 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 [2021-07-13 20:32:28,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:32:28,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:28,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:32:28,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:28,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:28,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 83 [2021-07-13 20:32:28,760 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:32:28,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:28,818 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:28,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 73 [2021-07-13 20:32:29,150 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:32:29,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:29,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:29,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-07-13 20:32:29,507 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:32:30,232 WARN L205 SmtUtils]: Spent 724.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 138 [2021-07-13 20:32:30,232 INFO L628 ElimStorePlain]: treesize reduction 678, result has 71.9 percent of original size [2021-07-13 20:32:31,086 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 278 [2021-07-13 20:32:31,600 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 216 [2021-07-13 20:32:32,384 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 223 [2021-07-13 20:32:32,709 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 189 [2021-07-13 20:32:32,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:32,908 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:64, output treesize:2790 [2021-07-13 20:32:33,556 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 44 [2021-07-13 20:32:33,683 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:33,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930747920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:33,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:33,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-13 20:32:33,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235938317] [2021-07-13 20:32:33,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:32:33,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:33,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:32:33,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:32:33,684 INFO L87 Difference]: Start difference. First operand 1625 states and 5558 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) [2021-07-13 20:32:35,963 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-07-13 20:32:36,420 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2021-07-13 20:32:36,940 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 52 [2021-07-13 20:32:36,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:36,988 INFO L93 Difference]: Finished difference Result 2782 states and 8999 transitions. [2021-07-13 20:32:36,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:32:36,989 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 26 [2021-07-13 20:32:36,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:36,994 INFO L225 Difference]: With dead ends: 2782 [2021-07-13 20:32:36,994 INFO L226 Difference]: Without dead ends: 2722 [2021-07-13 20:32:36,994 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 3166.7ms TimeCoverageRelationStatistics Valid=603, Invalid=2937, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:32:36,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2722 states. [2021-07-13 20:32:37,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2722 to 1634. [2021-07-13 20:32:37,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 3.425597060624617) internal successors, (5594), 1633 states have internal predecessors, (5594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:37,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 5594 transitions. [2021-07-13 20:32:37,021 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 5594 transitions. Word has length 26 [2021-07-13 20:32:37,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:37,021 INFO L482 AbstractCegarLoop]: Abstraction has 1634 states and 5594 transitions. [2021-07-13 20:32:37,021 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) [2021-07-13 20:32:37,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 5594 transitions. [2021-07-13 20:32:37,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:32:37,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:37,024 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:37,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2974 [2021-07-13 20:32:37,237 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:37,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:37,237 INFO L82 PathProgramCache]: Analyzing trace with hash 521488947, now seen corresponding path program 52 times [2021-07-13 20:32:37,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:37,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526993585] [2021-07-13 20:32:37,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:37,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:37,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:37,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526993585] [2021-07-13 20:32:37,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526993585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:37,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913250658] [2021-07-13 20:32:37,484 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 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 [2021-07-13 20:32:37,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:32:37,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:37,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:32:37,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:42,081 WARN L205 SmtUtils]: Spent 805.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-07-13 20:32:42,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:42,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:42,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:42,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-07-13 20:32:42,101 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:32:42,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:42,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:42,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:42,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:32:42,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 20:32:42,112 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:32:42,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:42,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:42,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-07-13 20:32:42,125 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:42,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:42,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:42,134 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-07-13 20:32:42,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:42,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913250658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:42,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:42,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-13 20:32:42,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042466749] [2021-07-13 20:32:42,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:32:42,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:42,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:32:42,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=215, Unknown=3, NotChecked=0, Total=272 [2021-07-13 20:32:42,151 INFO L87 Difference]: Start difference. First operand 1634 states and 5594 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:44,626 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 35 [2021-07-13 20:32:44,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:44,712 INFO L93 Difference]: Finished difference Result 2185 states and 7232 transitions. [2021-07-13 20:32:44,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:32:44,712 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:32:44,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:44,716 INFO L225 Difference]: With dead ends: 2185 [2021-07-13 20:32:44,716 INFO L226 Difference]: Without dead ends: 2170 [2021-07-13 20:32:44,717 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 6902.3ms TimeCoverageRelationStatistics Valid=350, Invalid=1453, Unknown=3, NotChecked=0, Total=1806 [2021-07-13 20:32:44,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-07-13 20:32:44,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1638. [2021-07-13 20:32:44,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 3.4257788637751987) internal successors, (5608), 1637 states have internal predecessors, (5608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:44,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 5608 transitions. [2021-07-13 20:32:44,739 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 5608 transitions. Word has length 26 [2021-07-13 20:32:44,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:44,739 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 5608 transitions. [2021-07-13 20:32:44,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:44,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 5608 transitions. [2021-07-13 20:32:44,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:32:44,742 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:44,742 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:44,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3488,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:44,945 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:44,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:44,945 INFO L82 PathProgramCache]: Analyzing trace with hash -2074580369, now seen corresponding path program 53 times [2021-07-13 20:32:44,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:44,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766292926] [2021-07-13 20:32:44,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:44,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:45,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:45,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766292926] [2021-07-13 20:32:45,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766292926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:45,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092532463] [2021-07-13 20:32:45,166 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 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 [2021-07-13 20:32:45,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:32:45,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:45,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:32:45,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:53,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:53,120 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-13 20:32:53,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 237 treesize of output 219 [2021-07-13 20:32:53,202 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:32:53,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:53,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:53,251 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-07-13 20:32:53,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 223 treesize of output 199 [2021-07-13 20:32:53,406 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:32:53,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:53,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:53,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 197 treesize of output 181 [2021-07-13 20:32:53,743 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:54,232 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 135 [2021-07-13 20:32:54,232 INFO L628 ElimStorePlain]: treesize reduction 162, result has 92.8 percent of original size [2021-07-13 20:32:55,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:55,140 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:245, output treesize:315 [2021-07-13 20:32:55,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:55,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092532463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:55,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:55,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-07-13 20:32:55,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255079172] [2021-07-13 20:32:55,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:32:55,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:55,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:32:55,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=350, Unknown=5, NotChecked=0, Total=420 [2021-07-13 20:32:55,214 INFO L87 Difference]: Start difference. First operand 1638 states and 5608 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 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) [2021-07-13 20:33:41,147 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-07-13 20:33:41,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:41,311 INFO L93 Difference]: Finished difference Result 2374 states and 7924 transitions. [2021-07-13 20:33:41,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:33:41,311 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:33:41,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:41,315 INFO L225 Difference]: With dead ends: 2374 [2021-07-13 20:33:41,316 INFO L226 Difference]: Without dead ends: 2359 [2021-07-13 20:33:41,316 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 17001.4ms TimeCoverageRelationStatistics Valid=305, Invalid=1580, Unknown=7, NotChecked=0, Total=1892 [2021-07-13 20:33:41,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2021-07-13 20:33:41,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 1638. [2021-07-13 20:33:41,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 3.4257788637751987) internal successors, (5608), 1637 states have internal predecessors, (5608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:41,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 5608 transitions. [2021-07-13 20:33:41,339 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 5608 transitions. Word has length 26 [2021-07-13 20:33:41,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:41,339 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 5608 transitions. [2021-07-13 20:33:41,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 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) [2021-07-13 20:33:41,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 5608 transitions. [2021-07-13 20:33:41,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:33:41,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:41,342 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:41,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3489 [2021-07-13 20:33:41,549 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:41,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:41,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1346907209, now seen corresponding path program 54 times [2021-07-13 20:33:41,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:41,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53738663] [2021-07-13 20:33:41,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:41,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:41,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:41,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53738663] [2021-07-13 20:33:41,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53738663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:41,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878067271] [2021-07-13 20:33:41,713 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 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 [2021-07-13 20:33:41,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:33:41,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:41,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:33:41,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:41,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:41,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:41,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:41,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 63 [2021-07-13 20:33:41,953 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:33:41,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:41,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:41,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:41,987 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:41,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 53 [2021-07-13 20:33:42,068 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:33:42,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:42,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:42,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-07-13 20:33:42,374 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:33:43,016 WARN L205 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 107 [2021-07-13 20:33:43,016 INFO L628 ElimStorePlain]: treesize reduction 1132, result has 46.5 percent of original size [2021-07-13 20:33:43,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:43,242 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:15 [2021-07-13 20:33:43,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:43,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878067271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:43,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:43,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-07-13 20:33:43,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619546287] [2021-07-13 20:33:43,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:33:43,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:43,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:33:43,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:33:43,278 INFO L87 Difference]: Start difference. First operand 1638 states and 5608 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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) [2021-07-13 20:33:45,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:45,153 INFO L93 Difference]: Finished difference Result 3261 states and 10301 transitions. [2021-07-13 20:33:45,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:33:45,153 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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 26 [2021-07-13 20:33:45,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:45,159 INFO L225 Difference]: With dead ends: 3261 [2021-07-13 20:33:45,159 INFO L226 Difference]: Without dead ends: 3214 [2021-07-13 20:33:45,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1418.6ms TimeCoverageRelationStatistics Valid=656, Invalid=3126, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:33:45,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3214 states. [2021-07-13 20:33:45,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3214 to 1647. [2021-07-13 20:33:45,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1646 states have (on average 3.4264884568651275) internal successors, (5640), 1646 states have internal predecessors, (5640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:45,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 5640 transitions. [2021-07-13 20:33:45,191 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 5640 transitions. Word has length 26 [2021-07-13 20:33:45,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:45,191 INFO L482 AbstractCegarLoop]: Abstraction has 1647 states and 5640 transitions. [2021-07-13 20:33:45,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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) [2021-07-13 20:33:45,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 5640 transitions. [2021-07-13 20:33:45,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:33:45,194 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:45,194 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:45,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3813,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:45,395 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:45,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:45,395 INFO L82 PathProgramCache]: Analyzing trace with hash -916217703, now seen corresponding path program 55 times [2021-07-13 20:33:45,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:45,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455477919] [2021-07-13 20:33:45,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:45,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:45,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:45,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:45,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455477919] [2021-07-13 20:33:45,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455477919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:45,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481456364] [2021-07-13 20:33:45,610 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 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 [2021-07-13 20:33:45,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:45,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:33:45,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:45,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:45,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:45,746 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:45,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 63 [2021-07-13 20:33:45,819 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:33:45,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:45,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:45,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:45,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:45,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 53 [2021-07-13 20:33:45,938 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:33:45,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:46,004 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:46,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-07-13 20:33:46,267 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:33:46,687 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 108 [2021-07-13 20:33:46,687 INFO L628 ElimStorePlain]: treesize reduction 1472, result has 39.4 percent of original size [2021-07-13 20:33:46,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:46,859 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:15 [2021-07-13 20:33:46,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:46,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481456364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:46,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:46,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:33:46,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73368479] [2021-07-13 20:33:46,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:33:46,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:46,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:33:46,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:33:46,898 INFO L87 Difference]: Start difference. First operand 1647 states and 5640 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-07-13 20:33:49,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:49,121 INFO L93 Difference]: Finished difference Result 2920 states and 9365 transitions. [2021-07-13 20:33:49,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:33:49,121 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 26 [2021-07-13 20:33:49,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:49,126 INFO L225 Difference]: With dead ends: 2920 [2021-07-13 20:33:49,127 INFO L226 Difference]: Without dead ends: 2886 [2021-07-13 20:33:49,127 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 1989.6ms TimeCoverageRelationStatistics Valid=698, Invalid=2494, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:33:49,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2886 states. [2021-07-13 20:33:49,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2886 to 1654. [2021-07-13 20:33:49,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 3.434966727162734) internal successors, (5678), 1653 states have internal predecessors, (5678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:49,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 5678 transitions. [2021-07-13 20:33:49,153 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 5678 transitions. Word has length 26 [2021-07-13 20:33:49,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:49,153 INFO L482 AbstractCegarLoop]: Abstraction has 1654 states and 5678 transitions. [2021-07-13 20:33:49,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-07-13 20:33:49,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 5678 transitions. [2021-07-13 20:33:49,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:33:49,156 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:49,156 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:49,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3947 [2021-07-13 20:33:49,356 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:49,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:49,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1471656619, now seen corresponding path program 32 times [2021-07-13 20:33:49,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:49,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914782041] [2021-07-13 20:33:49,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:49,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:49,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:49,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:49,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914782041] [2021-07-13 20:33:49,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914782041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:49,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430909951] [2021-07-13 20:33:49,457 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 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 [2021-07-13 20:33:49,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:33:49,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:49,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:33:49,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:49,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:49,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-07-13 20:33:49,653 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:33:49,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:49,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:49,673 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:49,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-07-13 20:33:49,689 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:33:49,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:49,722 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:49,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-07-13 20:33:49,731 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:33:49,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:49,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:49,794 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:41 [2021-07-13 20:33:49,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:49,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430909951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:49,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:49,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 20:33:49,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19912037] [2021-07-13 20:33:49,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:33:49,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:49,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:33:49,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:33:49,838 INFO L87 Difference]: Start difference. First operand 1654 states and 5678 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) [2021-07-13 20:33:50,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:50,661 INFO L93 Difference]: Finished difference Result 2114 states and 7070 transitions. [2021-07-13 20:33:50,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:33:50,661 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 26 [2021-07-13 20:33:50,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:50,665 INFO L225 Difference]: With dead ends: 2114 [2021-07-13 20:33:50,665 INFO L226 Difference]: Without dead ends: 2099 [2021-07-13 20:33:50,665 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 663.1ms TimeCoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:33:50,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2099 states. [2021-07-13 20:33:50,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2099 to 1645. [2021-07-13 20:33:50,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1644 states have (on average 3.431873479318735) internal successors, (5642), 1644 states have internal predecessors, (5642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:50,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 5642 transitions. [2021-07-13 20:33:50,688 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 5642 transitions. Word has length 26 [2021-07-13 20:33:50,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:50,688 INFO L482 AbstractCegarLoop]: Abstraction has 1645 states and 5642 transitions. [2021-07-13 20:33:50,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) [2021-07-13 20:33:50,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 5642 transitions. [2021-07-13 20:33:50,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:33:50,690 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:50,690 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:50,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4081 [2021-07-13 20:33:50,892 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:50,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:50,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1471507747, now seen corresponding path program 33 times [2021-07-13 20:33:50,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:50,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417485345] [2021-07-13 20:33:50,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:50,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:51,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:51,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:51,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417485345] [2021-07-13 20:33:51,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417485345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:51,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865743865] [2021-07-13 20:33:51,007 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 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 [2021-07-13 20:33:51,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:33:51,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:51,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:33:51,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:51,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:51,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:51,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 35 [2021-07-13 20:33:51,201 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:33:51,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:51,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:51,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:51,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:33:51,211 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:33:51,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:51,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:51,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-07-13 20:33:51,227 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:51,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:51,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:51,236 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-07-13 20:33:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:51,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865743865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:51,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:51,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:33:51,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906937765] [2021-07-13 20:33:51,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:33:51,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:51,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:33:51,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:33:51,252 INFO L87 Difference]: Start difference. First operand 1645 states and 5642 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-07-13 20:33:51,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:51,877 INFO L93 Difference]: Finished difference Result 2294 states and 7660 transitions. [2021-07-13 20:33:51,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:33:51,877 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 26 [2021-07-13 20:33:51,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:51,882 INFO L225 Difference]: With dead ends: 2294 [2021-07-13 20:33:51,882 INFO L226 Difference]: Without dead ends: 2279 [2021-07-13 20:33:51,882 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 497.4ms TimeCoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:33:51,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2279 states. [2021-07-13 20:33:51,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 1647. [2021-07-13 20:33:51,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1646 states have (on average 3.431956257594168) internal successors, (5649), 1646 states have internal predecessors, (5649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:51,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 5649 transitions. [2021-07-13 20:33:51,907 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 5649 transitions. Word has length 26 [2021-07-13 20:33:51,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:51,907 INFO L482 AbstractCegarLoop]: Abstraction has 1647 states and 5649 transitions. [2021-07-13 20:33:51,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-07-13 20:33:51,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 5649 transitions. [2021-07-13 20:33:51,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:33:51,910 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:51,910 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:52,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4099,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:52,110 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:52,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:52,111 INFO L82 PathProgramCache]: Analyzing trace with hash -146025033, now seen corresponding path program 34 times [2021-07-13 20:33:52,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:52,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047578672] [2021-07-13 20:33:52,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:52,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:52,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:52,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:52,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047578672] [2021-07-13 20:33:52,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047578672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:52,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497588850] [2021-07-13 20:33:52,221 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 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 [2021-07-13 20:33:52,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:33:52,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:52,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:33:52,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:52,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:52,397 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:52,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-07-13 20:33:52,413 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:33:52,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:52,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:52,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:52,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-07-13 20:33:52,449 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:33:52,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:52,481 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:52,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-07-13 20:33:52,485 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:33:52,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:52,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:52,541 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:19 [2021-07-13 20:33:52,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:52,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497588850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:52,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:52,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:33:52,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136877397] [2021-07-13 20:33:52,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:33:52,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:52,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:33:52,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:33:52,579 INFO L87 Difference]: Start difference. First operand 1647 states and 5649 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-07-13 20:33:53,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:53,371 INFO L93 Difference]: Finished difference Result 2530 states and 8380 transitions. [2021-07-13 20:33:53,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:33:53,371 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 26 [2021-07-13 20:33:53,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:53,375 INFO L225 Difference]: With dead ends: 2530 [2021-07-13 20:33:53,376 INFO L226 Difference]: Without dead ends: 2515 [2021-07-13 20:33:53,376 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 612.4ms TimeCoverageRelationStatistics Valid=248, Invalid=942, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:33:53,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2515 states. [2021-07-13 20:33:53,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2515 to 1638. [2021-07-13 20:33:53,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 3.427000610873549) internal successors, (5610), 1637 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:53,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 5610 transitions. [2021-07-13 20:33:53,400 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 5610 transitions. Word has length 26 [2021-07-13 20:33:53,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:53,400 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 5610 transitions. [2021-07-13 20:33:53,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-07-13 20:33:53,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 5610 transitions. [2021-07-13 20:33:53,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:33:53,403 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:53,403 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:53,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4100,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:53,603 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:53,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:53,604 INFO L82 PathProgramCache]: Analyzing trace with hash -628905925, now seen corresponding path program 35 times [2021-07-13 20:33:53,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:53,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111443612] [2021-07-13 20:33:53,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:53,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:53,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:53,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:53,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111443612] [2021-07-13 20:33:53,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111443612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:53,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345106855] [2021-07-13 20:33:53,733 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 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 [2021-07-13 20:33:53,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:33:53,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:53,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:33:53,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:53,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:53,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:53,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-07-13 20:33:53,920 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:33:53,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:53,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:53,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:53,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:33:53,931 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:33:53,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:53,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:53,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-07-13 20:33:53,944 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:53,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:53,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:53,953 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-07-13 20:33:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:53,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345106855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:53,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:53,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:33:53,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894664639] [2021-07-13 20:33:53,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:33:53,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:53,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:33:53,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:33:53,967 INFO L87 Difference]: Start difference. First operand 1638 states and 5610 transitions. Second operand has 18 states, 18 states have (on average 2.5) 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) [2021-07-13 20:33:54,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:54,383 INFO L93 Difference]: Finished difference Result 2064 states and 6895 transitions. [2021-07-13 20:33:54,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:33:54,384 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) 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 26 [2021-07-13 20:33:54,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:54,387 INFO L225 Difference]: With dead ends: 2064 [2021-07-13 20:33:54,387 INFO L226 Difference]: Without dead ends: 2043 [2021-07-13 20:33:54,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 358.7ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:33:54,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2021-07-13 20:33:54,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 1638. [2021-07-13 20:33:54,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 3.427000610873549) internal successors, (5610), 1637 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:54,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 5610 transitions. [2021-07-13 20:33:54,409 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 5610 transitions. Word has length 26 [2021-07-13 20:33:54,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:54,409 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 5610 transitions. [2021-07-13 20:33:54,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) 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) [2021-07-13 20:33:54,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 5610 transitions. [2021-07-13 20:33:54,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:33:54,412 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:54,412 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:54,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4119,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:54,618 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:54,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:54,619 INFO L82 PathProgramCache]: Analyzing trace with hash -2009149475, now seen corresponding path program 36 times [2021-07-13 20:33:54,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:54,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904896137] [2021-07-13 20:33:54,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:54,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:54,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:54,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:54,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904896137] [2021-07-13 20:33:54,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904896137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:54,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533303121] [2021-07-13 20:33:54,750 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 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 [2021-07-13 20:33:54,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:33:54,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:54,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:33:54,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:54,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:54,957 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:54,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-07-13 20:33:54,991 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:33:55,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:55,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:55,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:55,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-07-13 20:33:55,055 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:33:55,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:55,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:55,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-07-13 20:33:55,105 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:33:55,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:55,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:33:55,211 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:57, output treesize:173 [2021-07-13 20:33:55,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:55,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533303121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:55,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:55,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 20:33:55,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718675791] [2021-07-13 20:33:55,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:33:55,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:55,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:33:55,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:33:55,307 INFO L87 Difference]: Start difference. First operand 1638 states and 5610 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-07-13 20:33:57,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:57,874 INFO L93 Difference]: Finished difference Result 2222 states and 7252 transitions. [2021-07-13 20:33:57,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:33:57,874 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 26 [2021-07-13 20:33:57,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:57,878 INFO L225 Difference]: With dead ends: 2222 [2021-07-13 20:33:57,878 INFO L226 Difference]: Without dead ends: 2184 [2021-07-13 20:33:57,878 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 870.9ms TimeCoverageRelationStatistics Valid=176, Invalid=1156, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:33:57,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2021-07-13 20:33:57,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 1632. [2021-07-13 20:33:57,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1631 states have (on average 3.4267320662170446) internal successors, (5589), 1631 states have internal predecessors, (5589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:57,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 5589 transitions. [2021-07-13 20:33:57,905 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 5589 transitions. Word has length 26 [2021-07-13 20:33:57,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:57,906 INFO L482 AbstractCegarLoop]: Abstraction has 1632 states and 5589 transitions. [2021-07-13 20:33:57,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-07-13 20:33:57,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 5589 transitions. [2021-07-13 20:33:57,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:33:57,908 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:57,908 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:58,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4120 [2021-07-13 20:33:58,108 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:58,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:58,109 INFO L82 PathProgramCache]: Analyzing trace with hash -816683043, now seen corresponding path program 37 times [2021-07-13 20:33:58,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:58,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538334225] [2021-07-13 20:33:58,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:58,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:58,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:58,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:58,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538334225] [2021-07-13 20:33:58,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538334225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:58,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050379438] [2021-07-13 20:33:58,229 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 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 [2021-07-13 20:33:58,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:58,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:33:58,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:58,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:58,359 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:58,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-07-13 20:33:58,375 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:33:58,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:58,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:58,391 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:58,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-07-13 20:33:58,419 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:33:58,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:58,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:58,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-07-13 20:33:58,461 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:33:58,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:58,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:58,516 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-07-13 20:33:58,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:58,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050379438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:58,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:58,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:33:58,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232189010] [2021-07-13 20:33:58,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:33:58,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:58,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:33:58,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:33:58,551 INFO L87 Difference]: Start difference. First operand 1632 states and 5589 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 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) [2021-07-13 20:33:58,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:58,840 INFO L93 Difference]: Finished difference Result 2129 states and 7065 transitions. [2021-07-13 20:33:58,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:33:58,841 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 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 26 [2021-07-13 20:33:58,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:58,845 INFO L225 Difference]: With dead ends: 2129 [2021-07-13 20:33:58,845 INFO L226 Difference]: Without dead ends: 2104 [2021-07-13 20:33:58,845 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 283.8ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:33:58,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-07-13 20:33:58,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1626. [2021-07-13 20:33:58,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1625 states have (on average 3.420923076923077) internal successors, (5559), 1625 states have internal predecessors, (5559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:58,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 5559 transitions. [2021-07-13 20:33:58,868 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 5559 transitions. Word has length 26 [2021-07-13 20:33:58,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:58,868 INFO L482 AbstractCegarLoop]: Abstraction has 1626 states and 5559 transitions. [2021-07-13 20:33:58,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 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) [2021-07-13 20:33:58,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 5559 transitions. [2021-07-13 20:33:58,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:33:58,870 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:58,871 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:59,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4170,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:59,071 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:59,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:59,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1649350967, now seen corresponding path program 38 times [2021-07-13 20:33:59,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:59,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541465789] [2021-07-13 20:33:59,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:59,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:59,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:59,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541465789] [2021-07-13 20:33:59,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541465789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:59,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012981718] [2021-07-13 20:33:59,211 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 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 [2021-07-13 20:33:59,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:33:59,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:59,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:33:59,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:59,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:59,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:59,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-07-13 20:33:59,378 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:33:59,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:59,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:59,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:33:59,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 27 [2021-07-13 20:33:59,388 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:33:59,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:59,400 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:59,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-07-13 20:33:59,401 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:59,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:59,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:59,410 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-07-13 20:33:59,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:59,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012981718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:59,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:59,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:33:59,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540360167] [2021-07-13 20:33:59,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:33:59,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:59,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:33:59,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:33:59,427 INFO L87 Difference]: Start difference. First operand 1626 states and 5559 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:59,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:59,619 INFO L93 Difference]: Finished difference Result 1701 states and 5724 transitions. [2021-07-13 20:33:59,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:33:59,619 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:33:59,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:59,622 INFO L225 Difference]: With dead ends: 1701 [2021-07-13 20:33:59,622 INFO L226 Difference]: Without dead ends: 1682 [2021-07-13 20:33:59,622 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 263.9ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:33:59,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2021-07-13 20:33:59,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1618. [2021-07-13 20:33:59,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 3.419294990723562) internal successors, (5529), 1617 states have internal predecessors, (5529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:59,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 5529 transitions. [2021-07-13 20:33:59,642 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 5529 transitions. Word has length 26 [2021-07-13 20:33:59,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:59,642 INFO L482 AbstractCegarLoop]: Abstraction has 1618 states and 5529 transitions. [2021-07-13 20:33:59,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:59,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 5529 transitions. [2021-07-13 20:33:59,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:33:59,645 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:59,645 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:59,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4188 [2021-07-13 20:33:59,845 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:59,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:59,846 INFO L82 PathProgramCache]: Analyzing trace with hash -497941569, now seen corresponding path program 39 times [2021-07-13 20:33:59,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:59,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123138148] [2021-07-13 20:33:59,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:59,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:59,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:59,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:59,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123138148] [2021-07-13 20:33:59,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123138148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:59,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005721135] [2021-07-13 20:33:59,983 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 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 [2021-07-13 20:34:00,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:34:00,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:00,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:34:00,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:01,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:01,017 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:01,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-07-13 20:34:01,060 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:34:01,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:01,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:01,090 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:01,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-07-13 20:34:01,130 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:34:01,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:01,177 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:01,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-07-13 20:34:01,182 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:34:01,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:01,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:34:01,278 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:57, output treesize:154 [2021-07-13 20:34:01,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:01,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005721135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:01,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:01,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-07-13 20:34:01,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565958817] [2021-07-13 20:34:01,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:34:01,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:01,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:34:01,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=251, Unknown=1, NotChecked=0, Total=306 [2021-07-13 20:34:01,375 INFO L87 Difference]: Start difference. First operand 1618 states and 5529 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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) [2021-07-13 20:34:13,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:13,934 INFO L93 Difference]: Finished difference Result 1845 states and 6184 transitions. [2021-07-13 20:34:13,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:34:13,934 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:34:13,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:13,937 INFO L225 Difference]: With dead ends: 1845 [2021-07-13 20:34:13,937 INFO L226 Difference]: Without dead ends: 1820 [2021-07-13 20:34:13,937 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 4715.3ms TimeCoverageRelationStatistics Valid=129, Invalid=624, Unknown=3, NotChecked=0, Total=756 [2021-07-13 20:34:13,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1820 states. [2021-07-13 20:34:13,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1820 to 1600. [2021-07-13 20:34:13,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 3.424015009380863) internal successors, (5475), 1599 states have internal predecessors, (5475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:13,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 5475 transitions. [2021-07-13 20:34:13,957 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 5475 transitions. Word has length 26 [2021-07-13 20:34:13,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:13,958 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 5475 transitions. [2021-07-13 20:34:13,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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) [2021-07-13 20:34:13,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 5475 transitions. [2021-07-13 20:34:13,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:13,960 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:13,960 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:14,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4189 [2021-07-13 20:34:14,160 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:14,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:14,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1031976481, now seen corresponding path program 40 times [2021-07-13 20:34:14,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:14,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289030358] [2021-07-13 20:34:14,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:14,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:14,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:14,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:14,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289030358] [2021-07-13 20:34:14,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289030358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:14,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25390436] [2021-07-13 20:34:14,280 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 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 [2021-07-13 20:34:14,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:34:14,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:14,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:34:14,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:14,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:14,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:14,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-07-13 20:34:14,476 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:34:14,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:14,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:14,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:14,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 27 [2021-07-13 20:34:14,486 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:34:14,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:14,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:14,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-07-13 20:34:14,499 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:14,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:14,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:14,508 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-07-13 20:34:14,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:14,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25390436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:14,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:14,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:34:14,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911163519] [2021-07-13 20:34:14,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:34:14,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:14,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:34:14,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:34:14,525 INFO L87 Difference]: Start difference. First operand 1600 states and 5475 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-07-13 20:34:14,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:14,926 INFO L93 Difference]: Finished difference Result 2102 states and 6991 transitions. [2021-07-13 20:34:14,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:34:14,927 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 26 [2021-07-13 20:34:14,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:14,930 INFO L225 Difference]: With dead ends: 2102 [2021-07-13 20:34:14,930 INFO L226 Difference]: Without dead ends: 2087 [2021-07-13 20:34:14,930 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 419.4ms TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:34:14,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2087 states. [2021-07-13 20:34:14,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2087 to 1595. [2021-07-13 20:34:14,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.422835633626098) internal successors, (5456), 1594 states have internal predecessors, (5456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:14,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5456 transitions. [2021-07-13 20:34:14,952 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5456 transitions. Word has length 26 [2021-07-13 20:34:14,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:14,952 INFO L482 AbstractCegarLoop]: Abstraction has 1595 states and 5456 transitions. [2021-07-13 20:34:14,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-07-13 20:34:14,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5456 transitions. [2021-07-13 20:34:14,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:14,954 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:14,954 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:15,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4243 [2021-07-13 20:34:15,173 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:15,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:15,173 INFO L82 PathProgramCache]: Analyzing trace with hash -44484869, now seen corresponding path program 41 times [2021-07-13 20:34:15,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:15,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877250504] [2021-07-13 20:34:15,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:15,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:15,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877250504] [2021-07-13 20:34:15,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877250504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:15,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148240524] [2021-07-13 20:34:15,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:34:15,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:34:15,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:15,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:34:15,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:19,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:19,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:19,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-07-13 20:34:19,720 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:34:19,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:19,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:19,738 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:19,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-07-13 20:34:19,754 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:34:19,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:19,787 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:19,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-07-13 20:34:19,791 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:34:19,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:19,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:19,846 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:52, output treesize:40 [2021-07-13 20:34:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:19,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148240524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:19,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:19,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:34:19,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471914750] [2021-07-13 20:34:19,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:34:19,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:19,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:34:19,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=271, Unknown=3, NotChecked=0, Total=342 [2021-07-13 20:34:19,885 INFO L87 Difference]: Start difference. First operand 1595 states and 5456 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:31,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:31,757 INFO L93 Difference]: Finished difference Result 2234 states and 7411 transitions. [2021-07-13 20:34:31,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:34:31,757 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:34:31,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:31,761 INFO L225 Difference]: With dead ends: 2234 [2021-07-13 20:34:31,761 INFO L226 Difference]: Without dead ends: 2209 [2021-07-13 20:34:31,761 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 4744.4ms TimeCoverageRelationStatistics Valid=199, Invalid=854, Unknown=3, NotChecked=0, Total=1056 [2021-07-13 20:34:31,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2021-07-13 20:34:31,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 1573. [2021-07-13 20:34:31,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1573 states, 1572 states have (on average 3.422391857506361) internal successors, (5380), 1572 states have internal predecessors, (5380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:31,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1573 states to 1573 states and 5380 transitions. [2021-07-13 20:34:31,783 INFO L78 Accepts]: Start accepts. Automaton has 1573 states and 5380 transitions. Word has length 26 [2021-07-13 20:34:31,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:31,783 INFO L482 AbstractCegarLoop]: Abstraction has 1573 states and 5380 transitions. [2021-07-13 20:34:31,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:31,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1573 states and 5380 transitions. [2021-07-13 20:34:31,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:31,785 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:31,786 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:31,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4244 [2021-07-13 20:34:31,986 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:31,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:31,986 INFO L82 PathProgramCache]: Analyzing trace with hash -987079049, now seen corresponding path program 42 times [2021-07-13 20:34:31,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:31,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186532754] [2021-07-13 20:34:31,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:31,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:32,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:32,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:32,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186532754] [2021-07-13 20:34:32,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186532754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:32,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569701055] [2021-07-13 20:34:32,091 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 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 [2021-07-13 20:34:32,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:34:32,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:32,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:34:32,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:32,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:32,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-07-13 20:34:32,305 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:34:32,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:32,345 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:32,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-07-13 20:34:32,387 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:34:32,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:32,433 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:32,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-07-13 20:34:32,443 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:34:32,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:32,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:32,551 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:116 [2021-07-13 20:34:32,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:32,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569701055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:32,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:32,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-07-13 20:34:32,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190984849] [2021-07-13 20:34:32,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:34:32,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:32,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:34:32,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:34:32,607 INFO L87 Difference]: Start difference. First operand 1573 states and 5380 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) 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) [2021-07-13 20:34:33,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:33,143 INFO L93 Difference]: Finished difference Result 2054 states and 6859 transitions. [2021-07-13 20:34:33,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:34:33,143 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) 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 26 [2021-07-13 20:34:33,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:33,147 INFO L225 Difference]: With dead ends: 2054 [2021-07-13 20:34:33,147 INFO L226 Difference]: Without dead ends: 2039 [2021-07-13 20:34:33,147 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 467.4ms TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:34:33,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2021-07-13 20:34:33,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 1618. [2021-07-13 20:34:33,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 3.4162028447742734) internal successors, (5524), 1617 states have internal predecessors, (5524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:33,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 5524 transitions. [2021-07-13 20:34:33,168 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 5524 transitions. Word has length 26 [2021-07-13 20:34:33,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:33,168 INFO L482 AbstractCegarLoop]: Abstraction has 1618 states and 5524 transitions. [2021-07-13 20:34:33,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) 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) [2021-07-13 20:34:33,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 5524 transitions. [2021-07-13 20:34:33,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:33,171 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:33,171 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:33,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4263 [2021-07-13 20:34:33,371 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:33,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:33,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1154888141, now seen corresponding path program 43 times [2021-07-13 20:34:33,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:33,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632695328] [2021-07-13 20:34:33,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:33,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:33,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:33,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632695328] [2021-07-13 20:34:33,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632695328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:33,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674785599] [2021-07-13 20:34:33,481 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 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 [2021-07-13 20:34:33,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:33,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:34:33,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:33,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:33,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 35 [2021-07-13 20:34:33,665 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:34:33,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:33,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:33,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:33,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 27 [2021-07-13 20:34:33,675 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:34:33,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:33,687 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:33,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-07-13 20:34:33,689 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:33,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:33,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:33,698 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-07-13 20:34:33,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:33,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674785599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:33,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:33,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-13 20:34:33,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443860394] [2021-07-13 20:34:33,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:34:33,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:33,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:34:33,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:34:33,717 INFO L87 Difference]: Start difference. First operand 1618 states and 5524 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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) [2021-07-13 20:34:34,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:34,339 INFO L93 Difference]: Finished difference Result 2315 states and 7658 transitions. [2021-07-13 20:34:34,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:34:34,339 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:34:34,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:34,343 INFO L225 Difference]: With dead ends: 2315 [2021-07-13 20:34:34,343 INFO L226 Difference]: Without dead ends: 2300 [2021-07-13 20:34:34,343 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 552.1ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:34:34,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2021-07-13 20:34:34,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 1619. [2021-07-13 20:34:34,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1618 states have (on average 3.417799752781211) internal successors, (5530), 1618 states have internal predecessors, (5530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:34,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 5530 transitions. [2021-07-13 20:34:34,367 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 5530 transitions. Word has length 26 [2021-07-13 20:34:34,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:34,367 INFO L482 AbstractCegarLoop]: Abstraction has 1619 states and 5530 transitions. [2021-07-13 20:34:34,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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) [2021-07-13 20:34:34,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 5530 transitions. [2021-07-13 20:34:34,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:34,369 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:34,369 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:34,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4319,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:34,570 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:34,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:34,570 INFO L82 PathProgramCache]: Analyzing trace with hash -856114693, now seen corresponding path program 44 times [2021-07-13 20:34:34,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:34,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034144970] [2021-07-13 20:34:34,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:34,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:34,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:34,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034144970] [2021-07-13 20:34:34,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034144970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:34,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36702682] [2021-07-13 20:34:34,680 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 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 [2021-07-13 20:34:34,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:34:34,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:34,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:34:34,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:34,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:34,842 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:34,842 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 43 treesize of output 51 [2021-07-13 20:34:34,883 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:34:34,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:34,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:34,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:34,915 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 35 treesize of output 43 [2021-07-13 20:34:34,955 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:34:34,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:35,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:35,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-07-13 20:34:35,012 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:34:35,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:35,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:34:35,121 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:59, output treesize:97 [2021-07-13 20:34:35,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:35,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36702682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:35,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:35,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:34:35,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640528204] [2021-07-13 20:34:35,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:34:35,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:35,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:34:35,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:34:35,191 INFO L87 Difference]: Start difference. First operand 1619 states and 5530 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-07-13 20:34:35,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:35,519 INFO L93 Difference]: Finished difference Result 2120 states and 7093 transitions. [2021-07-13 20:34:35,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:34:35,519 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 26 [2021-07-13 20:34:35,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:35,523 INFO L225 Difference]: With dead ends: 2120 [2021-07-13 20:34:35,523 INFO L226 Difference]: Without dead ends: 2105 [2021-07-13 20:34:35,523 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 396.0ms TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:34:35,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2021-07-13 20:34:35,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 1622. [2021-07-13 20:34:35,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 3.421344848858729) internal successors, (5546), 1621 states have internal predecessors, (5546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:35,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 5546 transitions. [2021-07-13 20:34:35,555 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 5546 transitions. Word has length 26 [2021-07-13 20:34:35,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:35,555 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 5546 transitions. [2021-07-13 20:34:35,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-07-13 20:34:35,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 5546 transitions. [2021-07-13 20:34:35,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:35,557 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:35,557 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:35,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4320 [2021-07-13 20:34:35,758 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:35,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:35,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1488441339, now seen corresponding path program 45 times [2021-07-13 20:34:35,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:35,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412958516] [2021-07-13 20:34:35,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:35,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:35,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:35,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:35,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412958516] [2021-07-13 20:34:35,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412958516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:35,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137942799] [2021-07-13 20:34:35,848 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 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 [2021-07-13 20:34:35,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:34:35,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:35,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:34:35,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:36,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,887 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:36,887 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 43 treesize of output 51 [2021-07-13 20:34:36,933 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:34:36,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:36,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:36,963 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:36,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-07-13 20:34:36,996 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:34:37,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:37,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:37,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-07-13 20:34:37,053 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:34:37,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:37,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:34:37,172 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:59, output treesize:229 [2021-07-13 20:34:37,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:37,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137942799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:37,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:37,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:34:37,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655481929] [2021-07-13 20:34:37,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:34:37,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:37,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:34:37,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=231, Unknown=1, NotChecked=0, Total=306 [2021-07-13 20:34:37,257 INFO L87 Difference]: Start difference. First operand 1622 states and 5546 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-07-13 20:34:37,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:37,604 INFO L93 Difference]: Finished difference Result 2150 states and 7189 transitions. [2021-07-13 20:34:37,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:34:37,604 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 26 [2021-07-13 20:34:37,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:37,607 INFO L225 Difference]: With dead ends: 2150 [2021-07-13 20:34:37,607 INFO L226 Difference]: Without dead ends: 2135 [2021-07-13 20:34:37,607 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1262.6ms TimeCoverageRelationStatistics Valid=150, Invalid=499, Unknown=1, NotChecked=0, Total=650 [2021-07-13 20:34:37,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2021-07-13 20:34:37,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 1640. [2021-07-13 20:34:37,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 3.416717510677242) internal successors, (5600), 1639 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:37,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 5600 transitions. [2021-07-13 20:34:37,629 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 5600 transitions. Word has length 26 [2021-07-13 20:34:37,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:37,629 INFO L482 AbstractCegarLoop]: Abstraction has 1640 states and 5600 transitions. [2021-07-13 20:34:37,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-07-13 20:34:37,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 5600 transitions. [2021-07-13 20:34:37,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:37,632 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:37,632 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:37,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4377,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:37,832 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:37,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:37,833 INFO L82 PathProgramCache]: Analyzing trace with hash -2007184673, now seen corresponding path program 46 times [2021-07-13 20:34:37,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:37,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547856153] [2021-07-13 20:34:37,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:37,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:37,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:37,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:37,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547856153] [2021-07-13 20:34:37,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547856153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:37,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776315678] [2021-07-13 20:34:37,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:37,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:34:37,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:37,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:34:37,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:38,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:38,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:38,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-07-13 20:34:38,141 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:34:38,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:38,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:38,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:38,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:34:38,151 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:34:38,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:38,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:38,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-07-13 20:34:38,165 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:38,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:38,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:38,174 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-07-13 20:34:38,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:38,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776315678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:38,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:38,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:34:38,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401583355] [2021-07-13 20:34:38,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:34:38,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:38,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:34:38,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:34:38,190 INFO L87 Difference]: Start difference. First operand 1640 states and 5600 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-07-13 20:34:38,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:38,636 INFO L93 Difference]: Finished difference Result 2076 states and 6950 transitions. [2021-07-13 20:34:38,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:34:38,637 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 26 [2021-07-13 20:34:38,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:38,640 INFO L225 Difference]: With dead ends: 2076 [2021-07-13 20:34:38,640 INFO L226 Difference]: Without dead ends: 2061 [2021-07-13 20:34:38,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 387.8ms TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:34:38,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-07-13 20:34:38,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1661. [2021-07-13 20:34:38,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1660 states have (on average 3.4126506024096384) internal successors, (5665), 1660 states have internal predecessors, (5665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:38,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 5665 transitions. [2021-07-13 20:34:38,662 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 5665 transitions. Word has length 26 [2021-07-13 20:34:38,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:38,662 INFO L482 AbstractCegarLoop]: Abstraction has 1661 states and 5665 transitions. [2021-07-13 20:34:38,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2021-07-13 20:34:38,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 5665 transitions. [2021-07-13 20:34:38,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:38,665 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:38,665 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:38,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4433,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:38,865 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:38,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:38,865 INFO L82 PathProgramCache]: Analyzing trace with hash 670249843, now seen corresponding path program 47 times [2021-07-13 20:34:38,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:38,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876596978] [2021-07-13 20:34:38,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:38,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:38,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:38,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:38,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876596978] [2021-07-13 20:34:38,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876596978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:38,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110501852] [2021-07-13 20:34:38,984 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 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 [2021-07-13 20:34:39,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:34:39,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:39,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:34:39,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:39,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:39,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:39,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-07-13 20:34:39,182 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:34:39,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:39,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:39,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:39,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-07-13 20:34:39,217 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:34:39,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:39,250 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:39,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-07-13 20:34:39,259 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:34:39,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:39,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:39,318 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:52, output treesize:19 [2021-07-13 20:34:39,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:39,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110501852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:39,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:39,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:34:39,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404726226] [2021-07-13 20:34:39,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:34:39,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:39,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:34:39,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:34:39,356 INFO L87 Difference]: Start difference. First operand 1661 states and 5665 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:39,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:39,959 INFO L93 Difference]: Finished difference Result 2366 states and 7851 transitions. [2021-07-13 20:34:39,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:34:39,959 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:34:39,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:39,963 INFO L225 Difference]: With dead ends: 2366 [2021-07-13 20:34:39,963 INFO L226 Difference]: Without dead ends: 2351 [2021-07-13 20:34:39,963 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 506.1ms TimeCoverageRelationStatistics Valid=232, Invalid=890, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:34:39,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-07-13 20:34:39,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1658. [2021-07-13 20:34:39,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 3.4140012070006036) internal successors, (5657), 1657 states have internal predecessors, (5657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:39,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 5657 transitions. [2021-07-13 20:34:39,987 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 5657 transitions. Word has length 26 [2021-07-13 20:34:39,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:39,987 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 5657 transitions. [2021-07-13 20:34:39,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:39,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 5657 transitions. [2021-07-13 20:34:39,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:39,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:39,990 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:40,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4434,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:40,192 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:40,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:40,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1019693061, now seen corresponding path program 48 times [2021-07-13 20:34:40,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:40,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52459345] [2021-07-13 20:34:40,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:40,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:40,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:40,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:40,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52459345] [2021-07-13 20:34:40,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52459345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:40,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041777014] [2021-07-13 20:34:40,298 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 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 [2021-07-13 20:34:40,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:34:40,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:40,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:34:40,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:40,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:40,433 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:40,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-07-13 20:34:40,449 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:34:40,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:40,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:40,465 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:40,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-07-13 20:34:40,480 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:34:40,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:40,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:40,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-07-13 20:34:40,515 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:34:40,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:40,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:40,562 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-07-13 20:34:40,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:40,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041777014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:40,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:40,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-13 20:34:40,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753847944] [2021-07-13 20:34:40,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:34:40,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:40,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:34:40,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:34:40,600 INFO L87 Difference]: Start difference. First operand 1658 states and 5657 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) [2021-07-13 20:34:41,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:41,083 INFO L93 Difference]: Finished difference Result 2228 states and 7412 transitions. [2021-07-13 20:34:41,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:34:41,083 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 26 [2021-07-13 20:34:41,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:41,087 INFO L225 Difference]: With dead ends: 2228 [2021-07-13 20:34:41,087 INFO L226 Difference]: Without dead ends: 2203 [2021-07-13 20:34:41,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 425.5ms TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:34:41,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2203 states. [2021-07-13 20:34:41,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2203 to 1658. [2021-07-13 20:34:41,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 3.4164152082076042) internal successors, (5661), 1657 states have internal predecessors, (5661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:41,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 5661 transitions. [2021-07-13 20:34:41,110 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 5661 transitions. Word has length 26 [2021-07-13 20:34:41,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:41,110 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 5661 transitions. [2021-07-13 20:34:41,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) [2021-07-13 20:34:41,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 5661 transitions. [2021-07-13 20:34:41,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:41,113 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:41,113 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:41,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4453 [2021-07-13 20:34:41,314 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:41,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:41,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1464847671, now seen corresponding path program 49 times [2021-07-13 20:34:41,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:41,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275794024] [2021-07-13 20:34:41,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:41,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:41,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:41,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:41,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275794024] [2021-07-13 20:34:41,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275794024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:41,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561151573] [2021-07-13 20:34:41,426 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 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 [2021-07-13 20:34:41,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:41,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:34:41,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:43,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:43,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:43,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-07-13 20:34:43,154 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:34:43,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:43,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:43,173 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:43,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-07-13 20:34:43,189 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:34:43,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:43,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:43,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-07-13 20:34:43,225 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:34:43,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:43,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:43,280 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:36 [2021-07-13 20:34:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:43,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561151573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:43,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:43,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:34:43,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103635909] [2021-07-13 20:34:43,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:34:43,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:43,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:34:43,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=233, Unknown=1, NotChecked=0, Total=306 [2021-07-13 20:34:43,319 INFO L87 Difference]: Start difference. First operand 1658 states and 5661 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-07-13 20:34:47,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:47,510 INFO L93 Difference]: Finished difference Result 2151 states and 7200 transitions. [2021-07-13 20:34:47,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:34:47,511 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 26 [2021-07-13 20:34:47,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:47,515 INFO L225 Difference]: With dead ends: 2151 [2021-07-13 20:34:47,515 INFO L226 Difference]: Without dead ends: 2136 [2021-07-13 20:34:47,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1883.8ms TimeCoverageRelationStatistics Valid=143, Invalid=506, Unknown=1, NotChecked=0, Total=650 [2021-07-13 20:34:47,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-07-13 20:34:47,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 1658. [2021-07-13 20:34:47,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 3.4164152082076042) internal successors, (5661), 1657 states have internal predecessors, (5661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:47,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 5661 transitions. [2021-07-13 20:34:47,537 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 5661 transitions. Word has length 26 [2021-07-13 20:34:47,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:47,537 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 5661 transitions. [2021-07-13 20:34:47,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2021-07-13 20:34:47,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 5661 transitions. [2021-07-13 20:34:47,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:47,539 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:47,539 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:47,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4470 [2021-07-13 20:34:47,740 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:47,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:47,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1829221231, now seen corresponding path program 56 times [2021-07-13 20:34:47,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:47,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050778550] [2021-07-13 20:34:47,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:47,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:47,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:47,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:47,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050778550] [2021-07-13 20:34:47,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050778550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:47,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707660495] [2021-07-13 20:34:47,923 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 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 [2021-07-13 20:34:47,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:34:47,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:47,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:34:47,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:48,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:48,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:48,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:48,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 47 treesize of output 37 [2021-07-13 20:34:48,068 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:34:48,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:48,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:48,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:48,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:48,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 20:34:48,082 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:34:48,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:48,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:48,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-07-13 20:34:48,098 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:48,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:48,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:48,109 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:10 [2021-07-13 20:34:48,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:48,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707660495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:48,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:48,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:34:48,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275721091] [2021-07-13 20:34:48,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:34:48,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:48,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:34:48,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:34:48,140 INFO L87 Difference]: Start difference. First operand 1658 states and 5661 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 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) [2021-07-13 20:34:48,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:48,579 INFO L93 Difference]: Finished difference Result 2204 states and 7221 transitions. [2021-07-13 20:34:48,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:34:48,579 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 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 26 [2021-07-13 20:34:48,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:48,582 INFO L225 Difference]: With dead ends: 2204 [2021-07-13 20:34:48,582 INFO L226 Difference]: Without dead ends: 2152 [2021-07-13 20:34:48,583 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 508.1ms TimeCoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:34:48,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-07-13 20:34:48,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 1676. [2021-07-13 20:34:48,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.4077611940298507) internal successors, (5708), 1675 states have internal predecessors, (5708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:48,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5708 transitions. [2021-07-13 20:34:48,605 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5708 transitions. Word has length 26 [2021-07-13 20:34:48,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:48,605 INFO L482 AbstractCegarLoop]: Abstraction has 1676 states and 5708 transitions. [2021-07-13 20:34:48,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 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) [2021-07-13 20:34:48,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5708 transitions. [2021-07-13 20:34:48,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:34:48,607 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:48,607 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:48,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4489,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:48,808 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:48,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:48,808 INFO L82 PathProgramCache]: Analyzing trace with hash 554911219, now seen corresponding path program 57 times [2021-07-13 20:34:48,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:48,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079814771] [2021-07-13 20:34:48,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:48,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:48,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079814771] [2021-07-13 20:34:48,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079814771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:48,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851345961] [2021-07-13 20:34:48,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:34:49,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:34:49,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:49,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:34:49,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:50,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:50,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 69 [2021-07-13 20:34:50,914 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:34:50,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:50,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:50,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:50,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 57 [2021-07-13 20:34:51,025 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:34:51,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:51,093 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:51,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-07-13 20:34:51,279 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:34:51,930 WARN L205 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 118 [2021-07-13 20:34:51,930 INFO L628 ElimStorePlain]: treesize reduction 632, result has 68.1 percent of original size [2021-07-13 20:34:52,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:52,241 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:62, output treesize:63 [2021-07-13 20:34:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:52,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851345961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:52,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:52,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-13 20:34:52,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445088270] [2021-07-13 20:34:52,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:34:52,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:52,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:34:52,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=278, Unknown=1, NotChecked=0, Total=342 [2021-07-13 20:34:52,294 INFO L87 Difference]: Start difference. First operand 1676 states and 5708 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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) [2021-07-13 20:35:49,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:49,675 INFO L93 Difference]: Finished difference Result 2373 states and 7814 transitions. [2021-07-13 20:35:49,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:35:49,675 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:35:49,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:49,679 INFO L225 Difference]: With dead ends: 2373 [2021-07-13 20:35:49,680 INFO L226 Difference]: Without dead ends: 2358 [2021-07-13 20:35:49,680 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 27475.0ms TimeCoverageRelationStatistics Valid=360, Invalid=1788, Unknown=14, NotChecked=0, Total=2162 [2021-07-13 20:35:49,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2021-07-13 20:35:49,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 1672. [2021-07-13 20:35:49,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 3.40754039497307) internal successors, (5694), 1671 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:49,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 5694 transitions. [2021-07-13 20:35:49,704 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 5694 transitions. Word has length 26 [2021-07-13 20:35:49,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:49,704 INFO L482 AbstractCegarLoop]: Abstraction has 1672 states and 5694 transitions. [2021-07-13 20:35:49,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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) [2021-07-13 20:35:49,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 5694 transitions. [2021-07-13 20:35:49,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:49,706 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:49,706 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:49,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4490,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:49,907 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:49,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:49,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1130156151, now seen corresponding path program 58 times [2021-07-13 20:35:49,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:49,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429320957] [2021-07-13 20:35:49,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:49,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:50,040 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:50,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:50,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429320957] [2021-07-13 20:35:50,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429320957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:50,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666802832] [2021-07-13 20:35:50,040 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 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 [2021-07-13 20:35:50,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:35:50,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:50,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:35:50,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:50,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:50,249 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-07-13 20:35:50,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 237 treesize of output 217 [2021-07-13 20:35:50,315 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:35:50,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:50,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:50,367 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-07-13 20:35:50,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 221 treesize of output 195 [2021-07-13 20:35:50,527 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:35:50,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:50,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:50,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 193 treesize of output 177 [2021-07-13 20:35:50,830 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:51,347 WARN L205 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 125 [2021-07-13 20:35:51,347 INFO L628 ElimStorePlain]: treesize reduction 178, result has 90.9 percent of original size [2021-07-13 20:35:51,536 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 148 [2021-07-13 20:35:51,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:35:51,757 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:242, output treesize:27 [2021-07-13 20:35:51,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:51,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666802832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:51,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:51,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:35:51,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683806612] [2021-07-13 20:35:51,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:35:51,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:51,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:35:51,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:35:51,791 INFO L87 Difference]: Start difference. First operand 1672 states and 5694 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:52,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:52,532 INFO L93 Difference]: Finished difference Result 2003 states and 6539 transitions. [2021-07-13 20:35:52,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:35:52,533 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:35:52,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:52,536 INFO L225 Difference]: With dead ends: 2003 [2021-07-13 20:35:52,536 INFO L226 Difference]: Without dead ends: 1981 [2021-07-13 20:35:52,536 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 709.8ms TimeCoverageRelationStatistics Valid=202, Invalid=1058, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:35:52,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1981 states. [2021-07-13 20:35:52,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1981 to 1674. [2021-07-13 20:35:52,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 3.4076509264793784) internal successors, (5701), 1673 states have internal predecessors, (5701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:52,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 5701 transitions. [2021-07-13 20:35:52,559 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 5701 transitions. Word has length 26 [2021-07-13 20:35:52,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:52,559 INFO L482 AbstractCegarLoop]: Abstraction has 1674 states and 5701 transitions. [2021-07-13 20:35:52,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:52,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 5701 transitions. [2021-07-13 20:35:52,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:52,562 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:52,562 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:52,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4602,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:52,762 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:52,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:52,762 INFO L82 PathProgramCache]: Analyzing trace with hash -2096936581, now seen corresponding path program 59 times [2021-07-13 20:35:52,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:52,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418976961] [2021-07-13 20:35:52,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:52,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:52,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:52,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418976961] [2021-07-13 20:35:52,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418976961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:52,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518819535] [2021-07-13 20:35:52,919 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:35:52,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:35:52,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:52,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:35:52,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:53,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:53,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:53,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:53,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:53,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 47 treesize of output 37 [2021-07-13 20:35:53,911 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:35:53,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:53,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:53,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:53,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:53,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:53,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 20:35:53,922 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:35:53,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:53,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:53,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-07-13 20:35:53,935 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:53,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:53,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:35:53,944 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-07-13 20:35:53,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:53,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518819535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:53,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:53,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-07-13 20:35:53,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733594480] [2021-07-13 20:35:53,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:35:53,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:53,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:35:53,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=182, Unknown=1, NotChecked=0, Total=240 [2021-07-13 20:35:53,962 INFO L87 Difference]: Start difference. First operand 1674 states and 5701 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:55,134 WARN L205 SmtUtils]: Spent 866.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-07-13 20:35:55,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:55,186 INFO L93 Difference]: Finished difference Result 2047 states and 6837 transitions. [2021-07-13 20:35:55,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:35:55,186 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:35:55,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:55,190 INFO L225 Difference]: With dead ends: 2047 [2021-07-13 20:35:55,190 INFO L226 Difference]: Without dead ends: 2016 [2021-07-13 20:35:55,190 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 2099.1ms TimeCoverageRelationStatistics Valid=152, Invalid=549, Unknown=1, NotChecked=0, Total=702 [2021-07-13 20:35:55,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2021-07-13 20:35:55,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 1680. [2021-07-13 20:35:55,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.405598570577725) internal successors, (5718), 1679 states have internal predecessors, (5718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:55,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 5718 transitions. [2021-07-13 20:35:55,213 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 5718 transitions. Word has length 26 [2021-07-13 20:35:55,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:55,213 INFO L482 AbstractCegarLoop]: Abstraction has 1680 states and 5718 transitions. [2021-07-13 20:35:55,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:55,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 5718 transitions. [2021-07-13 20:35:55,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:35:55,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:55,215 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:55,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4721,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:55,416 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:55,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:55,416 INFO L82 PathProgramCache]: Analyzing trace with hash 540764283, now seen corresponding path program 60 times [2021-07-13 20:35:55,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:55,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488289256] [2021-07-13 20:35:55,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:55,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:55,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:55,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:55,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488289256] [2021-07-13 20:35:55,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488289256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:55,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116871942] [2021-07-13 20:35:55,544 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 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 [2021-07-13 20:35:55,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:35:55,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:55,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:35:55,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:58,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:58,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:58,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:58,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:58,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 47 treesize of output 37 [2021-07-13 20:35:58,304 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:35:58,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:58,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:58,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:58,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:58,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:58,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-07-13 20:35:58,315 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:35:58,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:58,327 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:58,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-07-13 20:35:58,328 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:58,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:58,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:35:58,338 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-07-13 20:35:58,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:58,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116871942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:58,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:58,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-13 20:35:58,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964382882] [2021-07-13 20:35:58,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:35:58,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:58,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:35:58,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=212, Unknown=3, NotChecked=0, Total=272 [2021-07-13 20:35:58,356 INFO L87 Difference]: Start difference. First operand 1680 states and 5718 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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) [2021-07-13 20:36:08,645 WARN L205 SmtUtils]: Spent 1.49 s on a formula simplification that was a NOOP. DAG size: 43 [2021-07-13 20:36:11,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:11,081 INFO L93 Difference]: Finished difference Result 2079 states and 6921 transitions. [2021-07-13 20:36:11,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:36:11,081 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 26 [2021-07-13 20:36:11,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:11,085 INFO L225 Difference]: With dead ends: 2079 [2021-07-13 20:36:11,085 INFO L226 Difference]: Without dead ends: 2064 [2021-07-13 20:36:11,085 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 7083.3ms TimeCoverageRelationStatistics Valid=158, Invalid=592, Unknown=6, NotChecked=0, Total=756 [2021-07-13 20:36:11,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2021-07-13 20:36:11,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 1680. [2021-07-13 20:36:11,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.405598570577725) internal successors, (5718), 1679 states have internal predecessors, (5718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:11,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 5718 transitions. [2021-07-13 20:36:11,115 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 5718 transitions. Word has length 26 [2021-07-13 20:36:11,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:11,115 INFO L482 AbstractCegarLoop]: Abstraction has 1680 states and 5718 transitions. [2021-07-13 20:36:11,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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) [2021-07-13 20:36:11,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 5718 transitions. [2021-07-13 20:36:11,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:11,118 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:11,118 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:11,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4722 [2021-07-13 20:36:11,318 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:11,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:11,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1112511237, now seen corresponding path program 50 times [2021-07-13 20:36:11,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:11,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539620359] [2021-07-13 20:36:11,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:11,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:11,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:11,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:11,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539620359] [2021-07-13 20:36:11,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539620359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:11,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081615377] [2021-07-13 20:36:11,486 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 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 [2021-07-13 20:36:11,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:36:11,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:11,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:36:11,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:11,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:11,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:11,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-07-13 20:36:11,635 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:36:11,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:11,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:11,651 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:11,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-07-13 20:36:11,668 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:36:11,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:11,699 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:11,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-07-13 20:36:11,709 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:36:11,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:11,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:36:11,766 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-07-13 20:36:11,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:11,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081615377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:11,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:11,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-13 20:36:11,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537785182] [2021-07-13 20:36:11,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:36:11,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:11,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:36:11,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:36:11,813 INFO L87 Difference]: Start difference. First operand 1680 states and 5718 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) [2021-07-13 20:36:13,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:13,082 INFO L93 Difference]: Finished difference Result 2348 states and 7703 transitions. [2021-07-13 20:36:13,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:36:13,082 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 26 [2021-07-13 20:36:13,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:13,086 INFO L225 Difference]: With dead ends: 2348 [2021-07-13 20:36:13,086 INFO L226 Difference]: Without dead ends: 2333 [2021-07-13 20:36:13,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 902.0ms TimeCoverageRelationStatistics Valid=282, Invalid=1358, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:36:13,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2021-07-13 20:36:13,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1687. [2021-07-13 20:36:13,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 3.4056939501779357) internal successors, (5742), 1686 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:13,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 5742 transitions. [2021-07-13 20:36:13,110 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 5742 transitions. Word has length 26 [2021-07-13 20:36:13,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:13,110 INFO L482 AbstractCegarLoop]: Abstraction has 1687 states and 5742 transitions. [2021-07-13 20:36:13,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) [2021-07-13 20:36:13,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 5742 transitions. [2021-07-13 20:36:13,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:13,112 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:13,113 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:13,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4723,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:13,313 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:13,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:13,313 INFO L82 PathProgramCache]: Analyzing trace with hash 437870327, now seen corresponding path program 61 times [2021-07-13 20:36:13,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:13,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381176211] [2021-07-13 20:36:13,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:13,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:13,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:13,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:13,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381176211] [2021-07-13 20:36:13,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381176211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:13,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771686814] [2021-07-13 20:36:13,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:13,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:13,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:36:13,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:13,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:13,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:13,640 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:13,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 63 [2021-07-13 20:36:13,718 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:36:13,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:13,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:13,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:13,757 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:13,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 53 [2021-07-13 20:36:13,838 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:36:13,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:13,908 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:13,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-07-13 20:36:14,067 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:36:14,473 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 118 [2021-07-13 20:36:14,474 INFO L628 ElimStorePlain]: treesize reduction 120, result has 92.5 percent of original size [2021-07-13 20:36:14,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:36:14,842 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:58, output treesize:98 [2021-07-13 20:36:14,876 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:14,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771686814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:14,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:14,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-13 20:36:14,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388222245] [2021-07-13 20:36:14,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:36:14,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:14,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:36:14,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:36:14,877 INFO L87 Difference]: Start difference. First operand 1687 states and 5742 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:16,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:16,531 INFO L93 Difference]: Finished difference Result 2521 states and 7986 transitions. [2021-07-13 20:36:16,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:36:16,531 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:36:16,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:16,536 INFO L225 Difference]: With dead ends: 2521 [2021-07-13 20:36:16,536 INFO L226 Difference]: Without dead ends: 2484 [2021-07-13 20:36:16,536 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1245.9ms TimeCoverageRelationStatistics Valid=353, Invalid=1999, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:36:16,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2021-07-13 20:36:16,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 1718. [2021-07-13 20:36:16,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1717 states have (on average 3.4111822947000583) internal successors, (5857), 1717 states have internal predecessors, (5857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:16,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 5857 transitions. [2021-07-13 20:36:16,563 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 5857 transitions. Word has length 26 [2021-07-13 20:36:16,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:16,563 INFO L482 AbstractCegarLoop]: Abstraction has 1718 states and 5857 transitions. [2021-07-13 20:36:16,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:16,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 5857 transitions. [2021-07-13 20:36:16,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:16,565 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:16,566 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:16,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4741,112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:16,781 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:16,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:16,781 INFO L82 PathProgramCache]: Analyzing trace with hash 663863851, now seen corresponding path program 62 times [2021-07-13 20:36:16,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:16,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022276876] [2021-07-13 20:36:16,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:16,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:16,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:16,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:16,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022276876] [2021-07-13 20:36:16,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022276876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:16,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688780367] [2021-07-13 20:36:16,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:16,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:36:16,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:16,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:36:16,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:17,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:17,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:17,034 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:17,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 63 [2021-07-13 20:36:17,115 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:36:17,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:17,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:17,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:17,149 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:17,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 53 [2021-07-13 20:36:17,234 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-07-13 20:36:17,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:17,304 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:17,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-07-13 20:36:17,504 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:36:17,986 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 123 [2021-07-13 20:36:17,986 INFO L628 ElimStorePlain]: treesize reduction 260, result has 86.7 percent of original size [2021-07-13 20:36:18,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:36:18,532 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:149 [2021-07-13 20:36:18,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:18,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688780367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:18,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:18,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:36:18,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325104282] [2021-07-13 20:36:18,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:36:18,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:18,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:36:18,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:36:18,586 INFO L87 Difference]: Start difference. First operand 1718 states and 5857 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:19,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:19,492 INFO L93 Difference]: Finished difference Result 2981 states and 9498 transitions. [2021-07-13 20:36:19,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:36:19,493 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:36:19,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:19,498 INFO L225 Difference]: With dead ends: 2981 [2021-07-13 20:36:19,498 INFO L226 Difference]: Without dead ends: 2944 [2021-07-13 20:36:19,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 667.2ms TimeCoverageRelationStatistics Valid=302, Invalid=1180, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:36:19,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2944 states. [2021-07-13 20:36:19,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2944 to 1737. [2021-07-13 20:36:19,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1736 states have (on average 3.4164746543778803) internal successors, (5931), 1736 states have internal predecessors, (5931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:19,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 5931 transitions. [2021-07-13 20:36:19,529 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 5931 transitions. Word has length 26 [2021-07-13 20:36:19,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:19,529 INFO L482 AbstractCegarLoop]: Abstraction has 1737 states and 5931 transitions. [2021-07-13 20:36:19,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:19,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 5931 transitions. [2021-07-13 20:36:19,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:36:19,531 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:19,531 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:19,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4890 [2021-07-13 20:36:19,738 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:19,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:19,738 INFO L82 PathProgramCache]: Analyzing trace with hash 53047903, now seen corresponding path program 51 times [2021-07-13 20:36:19,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:19,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500651462] [2021-07-13 20:36:19,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:19,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:19,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:19,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:19,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500651462] [2021-07-13 20:36:19,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500651462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:19,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084622628] [2021-07-13 20:36:19,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:19,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:36:19,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:19,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:36:19,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:21,557 WARN L205 SmtUtils]: Spent 1.53 s on a formula simplification that was a NOOP. DAG size: 40 [2021-07-13 20:36:22,806 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:22,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 59 [2021-07-13 20:36:22,887 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:36:22,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:22,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:22,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-07-13 20:36:23,002 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:36:23,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:23,061 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:23,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-07-13 20:36:23,072 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-13 20:36:23,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:23,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 9 xjuncts. [2021-07-13 20:36:23,284 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:61, output treesize:349 [2021-07-13 20:36:23,453 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-07-13 20:36:23,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:23,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084622628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:23,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:23,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 20:36:23,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003106611] [2021-07-13 20:36:23,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:36:23,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:23,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:36:23,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=251, Unknown=1, NotChecked=0, Total=306 [2021-07-13 20:36:23,477 INFO L87 Difference]: Start difference. First operand 1737 states and 5931 transitions. Second operand has 18 states, 18 states have (on average 2.5) 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) [2021-07-13 20:37:00,850 WARN L205 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 43 [2021-07-13 20:37:05,190 WARN L205 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-07-13 20:37:06,872 WARN L227 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2021-07-13 20:37:06,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:37:07,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5045 [2021-07-13 20:37:07,089 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:258) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:934) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:281) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1064) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:966) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:187) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:847) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:761) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:474) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:367) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:293) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:238) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1461) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:654) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:238) ... 48 more [2021-07-13 20:37:07,095 INFO L168 Benchmark]: Toolchain (without parser) took 586605.45 ms. Allocated memory was 163.6 MB in the beginning and 902.8 MB in the end (delta: 739.2 MB). Free memory was 142.2 MB in the beginning and 470.2 MB in the end (delta: -328.0 MB). Peak memory consumption was 411.7 MB. Max. memory is 8.0 GB. [2021-07-13 20:37:07,095 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 163.6 MB. Free memory was 143.4 MB in the beginning and 143.3 MB in the end (delta: 73.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:37:07,095 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.88 ms. Allocated memory is still 163.6 MB. Free memory was 142.1 MB in the beginning and 140.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:37:07,095 INFO L168 Benchmark]: Boogie Preprocessor took 19.99 ms. Allocated memory is still 163.6 MB. Free memory was 140.7 MB in the beginning and 139.7 MB in the end (delta: 951.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:37:07,095 INFO L168 Benchmark]: RCFGBuilder took 240.55 ms. Allocated memory is still 163.6 MB. Free memory was 139.6 MB in the beginning and 126.4 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-07-13 20:37:07,095 INFO L168 Benchmark]: TraceAbstraction took 586314.45 ms. Allocated memory was 163.6 MB in the beginning and 902.8 MB in the end (delta: 739.2 MB). Free memory was 125.9 MB in the beginning and 470.2 MB in the end (delta: -344.3 MB). Peak memory consumption was 395.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:37:07,095 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 0.10 ms. Allocated memory is still 163.6 MB. Free memory was 143.4 MB in the beginning and 143.3 MB in the end (delta: 73.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 25.88 ms. Allocated memory is still 163.6 MB. Free memory was 142.1 MB in the beginning and 140.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 19.99 ms. Allocated memory is still 163.6 MB. Free memory was 140.7 MB in the beginning and 139.7 MB in the end (delta: 951.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 240.55 ms. Allocated memory is still 163.6 MB. Free memory was 139.6 MB in the beginning and 126.4 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 586314.45 ms. Allocated memory was 163.6 MB in the beginning and 902.8 MB in the end (delta: 739.2 MB). Free memory was 125.9 MB in the beginning and 470.2 MB in the end (delta: -344.3 MB). Peak memory consumption was 395.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...