/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/buffer-series.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:25:23,199 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:25:23,200 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:25:23,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:25:23,252 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-13 20:25:23,254 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-13 20:25:23,255 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-13 20:25:23,255 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-13 20:25:23,256 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-13 20:25:23,257 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-13 20:25:23,257 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-13 20:25:23,258 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-13 20:25:23,259 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-13 20:25:23,260 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-13 20:25:23,261 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-13 20:25:23,261 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-13 20:25:23,263 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-07-13 20:25:23,269 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 20:25:23,287 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:25:23,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:25:23,288 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:25:23,288 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:25:23,288 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:25:23,289 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:25:23,289 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:25:23,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:25:23,289 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:25:23,289 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:25:23,289 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:25:23,289 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:25:23,289 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:25:23,289 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:25:23,290 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:25:23,290 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:25:23,290 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:25:23,290 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:25:23,290 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:25:23,290 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:25:23,290 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:25:23,290 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:25:23,290 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:25:23,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:25:23,291 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:25:23,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:25:23,291 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:25:23,291 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:25:23,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:25:23,291 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:25:23,291 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:25:23,291 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:25:23,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:25:23,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:25:23,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:25:23,543 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:25:23,544 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:25:23,545 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series.wvr.bpl [2021-07-13 20:25:23,545 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series.wvr.bpl' [2021-07-13 20:25:23,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:25:23,584 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:25:23,585 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:25:23,585 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:25:23,585 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:25:23,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:25:23" (1/1) ... [2021-07-13 20:25:23,600 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:25:23" (1/1) ... [2021-07-13 20:25:23,605 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:25:23,606 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:25:23,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:25:23,607 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:25:23,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:25:23" (1/1) ... [2021-07-13 20:25:23,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:25:23" (1/1) ... [2021-07-13 20:25:23,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:25:23" (1/1) ... [2021-07-13 20:25:23,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:25:23" (1/1) ... [2021-07-13 20:25:23,616 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:25:23" (1/1) ... [2021-07-13 20:25:23,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:25:23" (1/1) ... [2021-07-13 20:25:23,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:25:23" (1/1) ... [2021-07-13 20:25:23,625 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:25:23,626 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:25:23,626 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:25:23,626 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:25:23,628 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:25:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:25:23,695 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:25:23,695 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:25:23,696 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:25:23,696 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:25:23,696 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:25:23,696 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:25:23,696 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:25:23,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:25:23,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:25:23,696 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 20:25:23,696 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 20:25:23,696 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 20:25:23,697 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-07-13 20:25:23,697 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-07-13 20:25:23,697 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-07-13 20:25:23,697 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 20:25:23,870 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:25:23,870 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 20:25:23,872 INFO L202 PluginConnector]: Adding new model buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:25:23 BoogieIcfgContainer [2021-07-13 20:25:23,872 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:25:23,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:25:23,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:25:23,875 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:25:23,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:25:23" (1/2) ... [2021-07-13 20:25:23,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40ffbea3 and model type buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:25:23, skipping insertion in model container [2021-07-13 20:25:23,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:25:23" (2/2) ... [2021-07-13 20:25:23,877 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-series.wvr.bpl [2021-07-13 20:25:23,880 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:25:23,880 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:25:23,880 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:25:23,881 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:25:23,913 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-07-13 20:25:23,929 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-07-13 20:25:23,945 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:25:23,945 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:25:23,946 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:25:23,946 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:25:23,946 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:25:23,946 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:25:23,946 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:25:23,946 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:25:23,965 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-07-13 20:25:24,043 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:24,045 INFO L276 IsEmpty]: Start isEmpty. Operand has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:24,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 20:25:24,063 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:24,064 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:24,065 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:24,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:24,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1591089523, now seen corresponding path program 1 times [2021-07-13 20:25:24,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:24,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293578207] [2021-07-13 20:25:24,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:24,249 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 20:25:24,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:24,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293578207] [2021-07-13 20:25:24,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293578207] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:25:24,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:25:24,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 20:25:24,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962556014] [2021-07-13 20:25:24,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:25:24,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:24,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:25:24,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:25:24,264 INFO L87 Difference]: Start difference. First operand has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:24,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:24,342 INFO L93 Difference]: Finished difference Result 1236 states and 4843 transitions. [2021-07-13 20:25:24,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:25:24,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 20:25:24,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:24,372 INFO L225 Difference]: With dead ends: 1236 [2021-07-13 20:25:24,372 INFO L226 Difference]: Without dead ends: 1109 [2021-07-13 20:25:24,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:25:24,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-07-13 20:25:24,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 866. [2021-07-13 20:25:24,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.910982658959538) internal successors, (3383), 865 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:24,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 3383 transitions. [2021-07-13 20:25:24,485 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 3383 transitions. Word has length 19 [2021-07-13 20:25:24,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:24,487 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 3383 transitions. [2021-07-13 20:25:24,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:24,487 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 3383 transitions. [2021-07-13 20:25:24,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:25:24,491 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:24,491 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] [2021-07-13 20:25:24,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:25:24,492 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:24,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:24,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1256412427, now seen corresponding path program 1 times [2021-07-13 20:25:24,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:24,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616850225] [2021-07-13 20:25:24,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:24,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:24,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:24,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616850225] [2021-07-13 20:25:24,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616850225] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:25:24,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:25:24,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:25:24,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428102228] [2021-07-13 20:25:24,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:25:24,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:24,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:25:24,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:25:24,573 INFO L87 Difference]: Start difference. First operand 866 states and 3383 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:24,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:24,630 INFO L93 Difference]: Finished difference Result 1524 states and 5641 transitions. [2021-07-13 20:25:24,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:25:24,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:25:24,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:24,642 INFO L225 Difference]: With dead ends: 1524 [2021-07-13 20:25:24,643 INFO L226 Difference]: Without dead ends: 1418 [2021-07-13 20:25:24,643 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:25:24,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-07-13 20:25:24,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1170. [2021-07-13 20:25:24,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 3.888793840889649) internal successors, (4546), 1169 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:24,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 4546 transitions. [2021-07-13 20:25:24,676 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 4546 transitions. Word has length 21 [2021-07-13 20:25:24,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:24,676 INFO L482 AbstractCegarLoop]: Abstraction has 1170 states and 4546 transitions. [2021-07-13 20:25:24,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:24,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 4546 transitions. [2021-07-13 20:25:24,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:25:24,679 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:24,680 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] [2021-07-13 20:25:24,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 20:25:24,681 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:24,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:24,681 INFO L82 PathProgramCache]: Analyzing trace with hash -898961871, now seen corresponding path program 1 times [2021-07-13 20:25:24,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:24,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710923591] [2021-07-13 20:25:24,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:24,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:24,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710923591] [2021-07-13 20:25:24,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710923591] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:25:24,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:25:24,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:25:24,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265614968] [2021-07-13 20:25:24,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:25:24,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:24,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:25:24,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:25:24,747 INFO L87 Difference]: Start difference. First operand 1170 states and 4546 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:24,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:24,814 INFO L93 Difference]: Finished difference Result 2017 states and 7510 transitions. [2021-07-13 20:25:24,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:25:24,817 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:25:24,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:24,829 INFO L225 Difference]: With dead ends: 2017 [2021-07-13 20:25:24,830 INFO L226 Difference]: Without dead ends: 1875 [2021-07-13 20:25:24,834 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:25:24,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-07-13 20:25:24,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1656. [2021-07-13 20:25:24,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 3.8676737160120847) internal successors, (6401), 1655 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:24,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 6401 transitions. [2021-07-13 20:25:24,898 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 6401 transitions. Word has length 21 [2021-07-13 20:25:24,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:24,899 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 6401 transitions. [2021-07-13 20:25:24,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:24,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 6401 transitions. [2021-07-13 20:25:24,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:25:24,904 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:24,905 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 20:25:24,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 20:25:24,905 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:24,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:24,906 INFO L82 PathProgramCache]: Analyzing trace with hash 100882901, now seen corresponding path program 1 times [2021-07-13 20:25:24,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:24,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840956689] [2021-07-13 20:25:24,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:24,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:24,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:24,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:24,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840956689] [2021-07-13 20:25:24,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840956689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:24,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384492646] [2021-07-13 20:25:24,945 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 20:25:25,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:25,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 20:25:25,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:25,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:25,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384492646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:25,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:25,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-07-13 20:25:25,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762337171] [2021-07-13 20:25:25,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:25:25,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:25,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:25:25,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:25:25,094 INFO L87 Difference]: Start difference. First operand 1656 states and 6401 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:25,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:25,221 INFO L93 Difference]: Finished difference Result 2308 states and 8261 transitions. [2021-07-13 20:25:25,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:25:25,224 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:25:25,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:25,236 INFO L225 Difference]: With dead ends: 2308 [2021-07-13 20:25:25,236 INFO L226 Difference]: Without dead ends: 2108 [2021-07-13 20:25:25,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:25:25,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-07-13 20:25:25,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1456. [2021-07-13 20:25:25,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.777319587628866) internal successors, (5496), 1455 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:25,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5496 transitions. [2021-07-13 20:25:25,299 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5496 transitions. Word has length 24 [2021-07-13 20:25:25,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:25,299 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 5496 transitions. [2021-07-13 20:25:25,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:25,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5496 transitions. [2021-07-13 20:25:25,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:25:25,304 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:25,304 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 20:25:25,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:25,517 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:25,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:25,517 INFO L82 PathProgramCache]: Analyzing trace with hash -239710988, now seen corresponding path program 1 times [2021-07-13 20:25:25,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:25,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726335841] [2021-07-13 20:25:25,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:25,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:25,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:25,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726335841] [2021-07-13 20:25:25,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726335841] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:25:25,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:25:25,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:25:25,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304538858] [2021-07-13 20:25:25,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:25:25,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:25,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:25:25,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:25:25,546 INFO L87 Difference]: Start difference. First operand 1456 states and 5496 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:25,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:25,634 INFO L93 Difference]: Finished difference Result 1950 states and 6936 transitions. [2021-07-13 20:25:25,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:25:25,634 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:25:25,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:25,644 INFO L225 Difference]: With dead ends: 1950 [2021-07-13 20:25:25,644 INFO L226 Difference]: Without dead ends: 1860 [2021-07-13 20:25:25,644 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:25:25,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-07-13 20:25:25,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1544. [2021-07-13 20:25:25,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 3.725210628645496) internal successors, (5748), 1543 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:25,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5748 transitions. [2021-07-13 20:25:25,687 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5748 transitions. Word has length 24 [2021-07-13 20:25:25,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:25,687 INFO L482 AbstractCegarLoop]: Abstraction has 1544 states and 5748 transitions. [2021-07-13 20:25:25,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:25,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5748 transitions. [2021-07-13 20:25:25,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:25:25,690 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:25,690 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 20:25:25,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 20:25:25,691 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:25,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:25,691 INFO L82 PathProgramCache]: Analyzing trace with hash -647935628, now seen corresponding path program 2 times [2021-07-13 20:25:25,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:25,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406605741] [2021-07-13 20:25:25,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:25,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:25,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:25,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:25,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406605741] [2021-07-13 20:25:25,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406605741] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:25:25,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:25:25,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:25:25,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590498362] [2021-07-13 20:25:25,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:25:25,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:25,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:25:25,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:25:25,732 INFO L87 Difference]: Start difference. First operand 1544 states and 5748 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:25,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:25,795 INFO L93 Difference]: Finished difference Result 1308 states and 4722 transitions. [2021-07-13 20:25:25,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:25:25,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:25:25,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:25,801 INFO L225 Difference]: With dead ends: 1308 [2021-07-13 20:25:25,802 INFO L226 Difference]: Without dead ends: 1308 [2021-07-13 20:25:25,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:25:25,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-07-13 20:25:25,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1118. [2021-07-13 20:25:25,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.6499552372426143) internal successors, (4077), 1117 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:25,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4077 transitions. [2021-07-13 20:25:25,827 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4077 transitions. Word has length 24 [2021-07-13 20:25:25,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:25,827 INFO L482 AbstractCegarLoop]: Abstraction has 1118 states and 4077 transitions. [2021-07-13 20:25:25,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:25,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4077 transitions. [2021-07-13 20:25:25,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:25:25,830 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:25,830 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 20:25:25,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-13 20:25:25,830 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:25,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:25,831 INFO L82 PathProgramCache]: Analyzing trace with hash 373109395, now seen corresponding path program 2 times [2021-07-13 20:25:25,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:25,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030293652] [2021-07-13 20:25:25,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:25,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:25,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:25,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:25,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030293652] [2021-07-13 20:25:25,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030293652] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:25:25,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:25:25,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:25:25,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093677490] [2021-07-13 20:25:25,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:25:25,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:25,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:25:25,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:25:25,898 INFO L87 Difference]: Start difference. First operand 1118 states and 4077 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:25,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:25,941 INFO L93 Difference]: Finished difference Result 1142 states and 4135 transitions. [2021-07-13 20:25:25,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:25:25,942 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:25:25,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:25,947 INFO L225 Difference]: With dead ends: 1142 [2021-07-13 20:25:25,947 INFO L226 Difference]: Without dead ends: 1120 [2021-07-13 20:25:25,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:25:25,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-07-13 20:25:25,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1104. [2021-07-13 20:25:25,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 3.665457842248413) internal successors, (4043), 1103 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:25,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 4043 transitions. [2021-07-13 20:25:25,973 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 4043 transitions. Word has length 24 [2021-07-13 20:25:25,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:25,973 INFO L482 AbstractCegarLoop]: Abstraction has 1104 states and 4043 transitions. [2021-07-13 20:25:25,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:25,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 4043 transitions. [2021-07-13 20:25:25,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:25:25,977 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:25,977 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, 1, 1, 1] [2021-07-13 20:25:25,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-13 20:25:25,978 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:25,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:25,978 INFO L82 PathProgramCache]: Analyzing trace with hash -236313260, now seen corresponding path program 1 times [2021-07-13 20:25:25,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:25,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571835139] [2021-07-13 20:25:25,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:25,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:26,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:25:26,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:26,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571835139] [2021-07-13 20:25:26,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571835139] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:25:26,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:25:26,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:25:26,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465497687] [2021-07-13 20:25:26,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:25:26,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:26,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:25:26,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:25:26,022 INFO L87 Difference]: Start difference. First operand 1104 states and 4043 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:26,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:26,044 INFO L93 Difference]: Finished difference Result 1334 states and 4929 transitions. [2021-07-13 20:25:26,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:25:26,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:25:26,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:26,051 INFO L225 Difference]: With dead ends: 1334 [2021-07-13 20:25:26,051 INFO L226 Difference]: Without dead ends: 1334 [2021-07-13 20:25:26,051 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:25:26,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2021-07-13 20:25:26,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 954. [2021-07-13 20:25:26,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 3.63903462749213) internal successors, (3468), 953 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:26,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3468 transitions. [2021-07-13 20:25:26,072 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3468 transitions. Word has length 27 [2021-07-13 20:25:26,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:26,073 INFO L482 AbstractCegarLoop]: Abstraction has 954 states and 3468 transitions. [2021-07-13 20:25:26,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:26,073 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3468 transitions. [2021-07-13 20:25:26,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:25:26,076 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:26,076 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, 1, 1, 1] [2021-07-13 20:25:26,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-13 20:25:26,076 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:26,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:26,077 INFO L82 PathProgramCache]: Analyzing trace with hash 2123280916, now seen corresponding path program 1 times [2021-07-13 20:25:26,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:26,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763229397] [2021-07-13 20:25:26,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:26,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:26,107 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 20:25:26,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:26,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763229397] [2021-07-13 20:25:26,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763229397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:26,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697468284] [2021-07-13 20:25:26,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:26,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:26,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-13 20:25:26,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:26,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:26,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697468284] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:25:26,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 20:25:26,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-07-13 20:25:26,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600219550] [2021-07-13 20:25:26,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:25:26,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:26,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:25:26,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:25:26,193 INFO L87 Difference]: Start difference. First operand 954 states and 3468 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:26,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:26,209 INFO L93 Difference]: Finished difference Result 1658 states and 5999 transitions. [2021-07-13 20:25:26,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:25:26,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:25:26,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:26,217 INFO L225 Difference]: With dead ends: 1658 [2021-07-13 20:25:26,217 INFO L226 Difference]: Without dead ends: 1658 [2021-07-13 20:25:26,217 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:25:26,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2021-07-13 20:25:26,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1112. [2021-07-13 20:25:26,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.667866786678668) internal successors, (4075), 1111 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:26,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 4075 transitions. [2021-07-13 20:25:26,241 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 4075 transitions. Word has length 27 [2021-07-13 20:25:26,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:26,241 INFO L482 AbstractCegarLoop]: Abstraction has 1112 states and 4075 transitions. [2021-07-13 20:25:26,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:26,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 4075 transitions. [2021-07-13 20:25:26,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:25:26,244 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:26,244 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, 1, 1, 1, 1, 1] [2021-07-13 20:25:26,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:26,460 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:26,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:26,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1655387498, now seen corresponding path program 1 times [2021-07-13 20:25:26,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:26,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869103941] [2021-07-13 20:25:26,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:26,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:26,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:26,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:26,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869103941] [2021-07-13 20:25:26,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869103941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:26,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927193746] [2021-07-13 20:25:26,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:26,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:26,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:25:26,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:26,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 20:25:26,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:26,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:26,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:26,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-07-13 20:25:26,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 20:25:26,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:26,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:26,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:26,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-07-13 20:25:26,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:26,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927193746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:26,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:26,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-13 20:25:26,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858260953] [2021-07-13 20:25:26,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:25:26,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:26,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:25:26,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:25:26,872 INFO L87 Difference]: Start difference. First operand 1112 states and 4075 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:27,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:27,066 INFO L93 Difference]: Finished difference Result 2437 states and 9137 transitions. [2021-07-13 20:25:27,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:25:27,067 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:25:27,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:27,081 INFO L225 Difference]: With dead ends: 2437 [2021-07-13 20:25:27,081 INFO L226 Difference]: Without dead ends: 2358 [2021-07-13 20:25:27,082 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 145.1ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:25:27,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2021-07-13 20:25:27,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 1653. [2021-07-13 20:25:27,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 3.7421307506053267) internal successors, (6182), 1652 states have internal predecessors, (6182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:27,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 6182 transitions. [2021-07-13 20:25:27,128 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 6182 transitions. Word has length 29 [2021-07-13 20:25:27,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:27,128 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 6182 transitions. [2021-07-13 20:25:27,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:27,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 6182 transitions. [2021-07-13 20:25:27,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:25:27,132 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:27,133 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, 1, 1, 1, 1, 1] [2021-07-13 20:25:27,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-13 20:25:27,351 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:27,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:27,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1973616880, now seen corresponding path program 2 times [2021-07-13 20:25:27,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:27,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657863261] [2021-07-13 20:25:27,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:27,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:27,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:27,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:27,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657863261] [2021-07-13 20:25:27,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657863261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:27,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795421085] [2021-07-13 20:25:27,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:25:27,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:25:27,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:27,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:25:27,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:27,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 20:25:27,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:27,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:27,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:27,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-07-13 20:25:27,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 20:25:27,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:27,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:27,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:27,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-07-13 20:25:27,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:27,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795421085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:27,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:27,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-13 20:25:27,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214013118] [2021-07-13 20:25:27,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:25:27,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:27,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:25:27,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:25:27,631 INFO L87 Difference]: Start difference. First operand 1653 states and 6182 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 20:25:27,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:27,796 INFO L93 Difference]: Finished difference Result 2489 states and 9353 transitions. [2021-07-13 20:25:27,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:25:27,796 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:25:27,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:27,805 INFO L225 Difference]: With dead ends: 2489 [2021-07-13 20:25:27,806 INFO L226 Difference]: Without dead ends: 2410 [2021-07-13 20:25:27,806 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 137.8ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:25:27,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2021-07-13 20:25:27,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 1791. [2021-07-13 20:25:27,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1790 states have (on average 3.7452513966480447) internal successors, (6704), 1790 states have internal predecessors, (6704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:27,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 6704 transitions. [2021-07-13 20:25:27,845 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 6704 transitions. Word has length 29 [2021-07-13 20:25:27,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:27,847 INFO L482 AbstractCegarLoop]: Abstraction has 1791 states and 6704 transitions. [2021-07-13 20:25:27,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 20:25:27,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 6704 transitions. [2021-07-13 20:25:27,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:25:27,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:27,851 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, 1, 1, 1, 1, 1] [2021-07-13 20:25:28,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:28,065 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:28,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:28,065 INFO L82 PathProgramCache]: Analyzing trace with hash -2042339794, now seen corresponding path program 3 times [2021-07-13 20:25:28,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:28,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9541246] [2021-07-13 20:25:28,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:28,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:28,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:28,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:28,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9541246] [2021-07-13 20:25:28,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9541246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:28,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456785813] [2021-07-13 20:25:28,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:28,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:25:28,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:28,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:25:28,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:28,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 20:25:28,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:28,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:28,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:28,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:12 [2021-07-13 20:25:28,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 20:25:28,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:28,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:28,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:28,300 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:7 [2021-07-13 20:25:28,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:28,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456785813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:28,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:28,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-13 20:25:28,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791418709] [2021-07-13 20:25:28,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:25:28,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:28,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:25:28,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:25:28,338 INFO L87 Difference]: Start difference. First operand 1791 states and 6704 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:28,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:28,489 INFO L93 Difference]: Finished difference Result 3013 states and 11337 transitions. [2021-07-13 20:25:28,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:25:28,489 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:25:28,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:28,499 INFO L225 Difference]: With dead ends: 3013 [2021-07-13 20:25:28,499 INFO L226 Difference]: Without dead ends: 2934 [2021-07-13 20:25:28,500 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 130.2ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:25:28,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-07-13 20:25:28,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 1887. [2021-07-13 20:25:28,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1886 states have (on average 3.7338282078472957) internal successors, (7042), 1886 states have internal predecessors, (7042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:28,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 7042 transitions. [2021-07-13 20:25:28,542 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 7042 transitions. Word has length 29 [2021-07-13 20:25:28,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:28,542 INFO L482 AbstractCegarLoop]: Abstraction has 1887 states and 7042 transitions. [2021-07-13 20:25:28,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:28,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 7042 transitions. [2021-07-13 20:25:28,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:25:28,546 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:28,546 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, 1, 1, 1, 1, 1] [2021-07-13 20:25:28,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-07-13 20:25:28,765 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:28,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:28,765 INFO L82 PathProgramCache]: Analyzing trace with hash 582053582, now seen corresponding path program 4 times [2021-07-13 20:25:28,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:28,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297168951] [2021-07-13 20:25:28,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:28,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:28,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:28,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:28,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297168951] [2021-07-13 20:25:28,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297168951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:28,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761794954] [2021-07-13 20:25:28,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:28,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:25:28,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:28,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:25:28,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:28,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 20:25:28,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:28,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:28,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:28,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-07-13 20:25:28,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 20:25:28,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:28,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:28,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:28,967 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-07-13 20:25:28,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:28,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761794954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:28,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:28,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-13 20:25:28,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079464786] [2021-07-13 20:25:28,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:25:28,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:29,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:25:29,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:25:29,000 INFO L87 Difference]: Start difference. First operand 1887 states and 7042 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:29,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:29,214 INFO L93 Difference]: Finished difference Result 3013 states and 11358 transitions. [2021-07-13 20:25:29,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:25:29,214 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:25:29,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:29,223 INFO L225 Difference]: With dead ends: 3013 [2021-07-13 20:25:29,223 INFO L226 Difference]: Without dead ends: 2934 [2021-07-13 20:25:29,223 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 140.9ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:25:29,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-07-13 20:25:29,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 2081. [2021-07-13 20:25:29,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2081 states, 2080 states have (on average 3.751923076923077) internal successors, (7804), 2080 states have internal predecessors, (7804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:29,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 7804 transitions. [2021-07-13 20:25:29,268 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 7804 transitions. Word has length 29 [2021-07-13 20:25:29,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:29,268 INFO L482 AbstractCegarLoop]: Abstraction has 2081 states and 7804 transitions. [2021-07-13 20:25:29,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:29,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 7804 transitions. [2021-07-13 20:25:29,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:25:29,273 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:29,273 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, 1, 1, 1, 1, 1] [2021-07-13 20:25:29,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:29,485 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:29,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:29,485 INFO L82 PathProgramCache]: Analyzing trace with hash -83909336, now seen corresponding path program 5 times [2021-07-13 20:25:29,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:29,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165155664] [2021-07-13 20:25:29,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:29,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:29,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:29,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165155664] [2021-07-13 20:25:29,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165155664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:29,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804042249] [2021-07-13 20:25:29,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:29,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:25:29,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:29,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:25:29,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:29,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-07-13 20:25:29,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:29,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:29,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:29,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-07-13 20:25:29,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 20:25:29,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:29,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:29,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:29,703 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-07-13 20:25:29,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:29,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804042249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:29,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:29,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-13 20:25:29,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441589549] [2021-07-13 20:25:29,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:25:29,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:29,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:25:29,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:25:29,743 INFO L87 Difference]: Start difference. First operand 2081 states and 7804 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 20:25:29,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:29,957 INFO L93 Difference]: Finished difference Result 2791 states and 10482 transitions. [2021-07-13 20:25:29,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:25:29,958 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:25:29,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:29,965 INFO L225 Difference]: With dead ends: 2791 [2021-07-13 20:25:29,965 INFO L226 Difference]: Without dead ends: 2712 [2021-07-13 20:25:29,966 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 146.6ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:25:29,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-07-13 20:25:29,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 1882. [2021-07-13 20:25:30,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1881 states have (on average 3.741095162147794) internal successors, (7037), 1881 states have internal predecessors, (7037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:30,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 7037 transitions. [2021-07-13 20:25:30,006 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 7037 transitions. Word has length 29 [2021-07-13 20:25:30,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:30,006 INFO L482 AbstractCegarLoop]: Abstraction has 1882 states and 7037 transitions. [2021-07-13 20:25:30,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 20:25:30,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 7037 transitions. [2021-07-13 20:25:30,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:25:30,012 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:30,012 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, 1, 1, 1, 1, 1] [2021-07-13 20:25:30,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-13 20:25:30,225 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:30,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:30,225 INFO L82 PathProgramCache]: Analyzing trace with hash 2053161624, now seen corresponding path program 6 times [2021-07-13 20:25:30,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:30,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822740764] [2021-07-13 20:25:30,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:30,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:30,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:30,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:30,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822740764] [2021-07-13 20:25:30,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822740764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:30,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939922117] [2021-07-13 20:25:30,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:30,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:25:30,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:30,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:25:30,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:30,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 20:25:30,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:30,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:30,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:30,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:14 [2021-07-13 20:25:30,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 20:25:30,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:30,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:30,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:30,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:7 [2021-07-13 20:25:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:30,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939922117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:30,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:30,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-07-13 20:25:30,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853672157] [2021-07-13 20:25:30,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:25:30,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:30,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:25:30,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:25:30,483 INFO L87 Difference]: Start difference. First operand 1882 states and 7037 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 20:25:30,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:30,734 INFO L93 Difference]: Finished difference Result 2687 states and 10043 transitions. [2021-07-13 20:25:30,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:25:30,735 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:25:30,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:30,753 INFO L225 Difference]: With dead ends: 2687 [2021-07-13 20:25:30,753 INFO L226 Difference]: Without dead ends: 2608 [2021-07-13 20:25:30,755 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 175.1ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:25:30,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-07-13 20:25:30,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 1926. [2021-07-13 20:25:30,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1925 states have (on average 3.7314285714285713) internal successors, (7183), 1925 states have internal predecessors, (7183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:30,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 7183 transitions. [2021-07-13 20:25:30,789 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 7183 transitions. Word has length 29 [2021-07-13 20:25:30,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:30,790 INFO L482 AbstractCegarLoop]: Abstraction has 1926 states and 7183 transitions. [2021-07-13 20:25:30,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 20:25:30,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 7183 transitions. [2021-07-13 20:25:30,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:25:30,793 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:30,793 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, 1, 1, 1, 1, 1] [2021-07-13 20:25:31,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 20:25:31,009 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:31,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:31,009 INFO L82 PathProgramCache]: Analyzing trace with hash 586599064, now seen corresponding path program 7 times [2021-07-13 20:25:31,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:31,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039338985] [2021-07-13 20:25:31,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:31,035 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:31,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:31,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039338985] [2021-07-13 20:25:31,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039338985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:31,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138474496] [2021-07-13 20:25:31,036 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:31,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:31,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 20:25:31,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:31,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:31,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138474496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:31,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:31,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-07-13 20:25:31,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931597078] [2021-07-13 20:25:31,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:25:31,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:31,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:25:31,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:25:31,118 INFO L87 Difference]: Start difference. First operand 1926 states and 7183 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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 20:25:31,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:31,176 INFO L93 Difference]: Finished difference Result 3472 states and 12599 transitions. [2021-07-13 20:25:31,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:25:31,176 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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 31 [2021-07-13 20:25:31,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:31,185 INFO L225 Difference]: With dead ends: 3472 [2021-07-13 20:25:31,185 INFO L226 Difference]: Without dead ends: 3318 [2021-07-13 20:25:31,185 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:25:31,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3318 states. [2021-07-13 20:25:31,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3318 to 2796. [2021-07-13 20:25:31,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2796 states, 2795 states have (on average 3.759212880143113) internal successors, (10507), 2795 states have internal predecessors, (10507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:31,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2796 states to 2796 states and 10507 transitions. [2021-07-13 20:25:31,238 INFO L78 Accepts]: Start accepts. Automaton has 2796 states and 10507 transitions. Word has length 31 [2021-07-13 20:25:31,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:31,238 INFO L482 AbstractCegarLoop]: Abstraction has 2796 states and 10507 transitions. [2021-07-13 20:25:31,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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 20:25:31,238 INFO L276 IsEmpty]: Start isEmpty. Operand 2796 states and 10507 transitions. [2021-07-13 20:25:31,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:25:31,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:31,243 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, 1, 1, 1, 1, 1] [2021-07-13 20:25:31,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-13 20:25:31,459 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:31,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:31,459 INFO L82 PathProgramCache]: Analyzing trace with hash 413869912, now seen corresponding path program 8 times [2021-07-13 20:25:31,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:31,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972514713] [2021-07-13 20:25:31,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:31,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:31,476 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:25:31,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:31,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972514713] [2021-07-13 20:25:31,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972514713] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:25:31,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:25:31,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:25:31,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104846460] [2021-07-13 20:25:31,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:25:31,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:31,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:25:31,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:25:31,477 INFO L87 Difference]: Start difference. First operand 2796 states and 10507 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 20:25:31,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:31,513 INFO L93 Difference]: Finished difference Result 5761 states and 21881 transitions. [2021-07-13 20:25:31,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:25:31,514 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 31 [2021-07-13 20:25:31,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:31,530 INFO L225 Difference]: With dead ends: 5761 [2021-07-13 20:25:31,530 INFO L226 Difference]: Without dead ends: 5510 [2021-07-13 20:25:31,530 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:25:31,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5510 states. [2021-07-13 20:25:31,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5510 to 4894. [2021-07-13 20:25:31,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4894 states, 4893 states have (on average 3.8779889638258735) internal successors, (18975), 4893 states have internal predecessors, (18975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:31,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4894 states to 4894 states and 18975 transitions. [2021-07-13 20:25:31,645 INFO L78 Accepts]: Start accepts. Automaton has 4894 states and 18975 transitions. Word has length 31 [2021-07-13 20:25:31,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:31,645 INFO L482 AbstractCegarLoop]: Abstraction has 4894 states and 18975 transitions. [2021-07-13 20:25:31,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 20:25:31,645 INFO L276 IsEmpty]: Start isEmpty. Operand 4894 states and 18975 transitions. [2021-07-13 20:25:31,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:25:31,655 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:31,655 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:31,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-07-13 20:25:31,656 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:31,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:31,656 INFO L82 PathProgramCache]: Analyzing trace with hash -973577864, now seen corresponding path program 9 times [2021-07-13 20:25:31,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:31,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456606458] [2021-07-13 20:25:31,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:31,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:31,677 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:25:31,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:31,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456606458] [2021-07-13 20:25:31,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456606458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:31,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838563271] [2021-07-13 20:25:31,677 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 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 20:25:31,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:25:31,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:31,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:25:31,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:31,793 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:25:31,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838563271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:31,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:31,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-13 20:25:31,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251959257] [2021-07-13 20:25:31,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:25:31,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:31,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:25:31,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:25:31,794 INFO L87 Difference]: Start difference. First operand 4894 states and 18975 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:32,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:32,143 INFO L93 Difference]: Finished difference Result 17927 states and 66398 transitions. [2021-07-13 20:25:32,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:25:32,145 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:25:32,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:32,187 INFO L225 Difference]: With dead ends: 17927 [2021-07-13 20:25:32,187 INFO L226 Difference]: Without dead ends: 15301 [2021-07-13 20:25:32,187 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:25:32,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15301 states. [2021-07-13 20:25:32,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15301 to 8354. [2021-07-13 20:25:32,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8354 states, 8353 states have (on average 3.950676403687298) internal successors, (33000), 8353 states have internal predecessors, (33000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:32,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8354 states to 8354 states and 33000 transitions. [2021-07-13 20:25:32,477 INFO L78 Accepts]: Start accepts. Automaton has 8354 states and 33000 transitions. Word has length 34 [2021-07-13 20:25:32,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:32,478 INFO L482 AbstractCegarLoop]: Abstraction has 8354 states and 33000 transitions. [2021-07-13 20:25:32,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:32,478 INFO L276 IsEmpty]: Start isEmpty. Operand 8354 states and 33000 transitions. [2021-07-13 20:25:32,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:25:32,498 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:32,498 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:32,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 20:25:32,721 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:32,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:32,722 INFO L82 PathProgramCache]: Analyzing trace with hash 726243605, now seen corresponding path program 10 times [2021-07-13 20:25:32,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:32,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555224989] [2021-07-13 20:25:32,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:32,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:32,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:25:32,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:32,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555224989] [2021-07-13 20:25:32,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555224989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:32,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244360228] [2021-07-13 20:25:32,748 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 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 20:25:32,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:25:32,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:32,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:25:32,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:25:32,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244360228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:32,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:32,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-13 20:25:32,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574065474] [2021-07-13 20:25:32,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:25:32,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:32,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:25:32,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:25:32,848 INFO L87 Difference]: Start difference. First operand 8354 states and 33000 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:33,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:33,229 INFO L93 Difference]: Finished difference Result 21371 states and 81454 transitions. [2021-07-13 20:25:33,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:25:33,230 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:25:33,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:33,297 INFO L225 Difference]: With dead ends: 21371 [2021-07-13 20:25:33,298 INFO L226 Difference]: Without dead ends: 20932 [2021-07-13 20:25:33,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 108.2ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:25:33,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20932 states. [2021-07-13 20:25:33,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20932 to 12631. [2021-07-13 20:25:33,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12631 states, 12630 states have (on average 4.037925574030087) internal successors, (50999), 12630 states have internal predecessors, (50999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:33,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12631 states to 12631 states and 50999 transitions. [2021-07-13 20:25:33,923 INFO L78 Accepts]: Start accepts. Automaton has 12631 states and 50999 transitions. Word has length 34 [2021-07-13 20:25:33,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:33,923 INFO L482 AbstractCegarLoop]: Abstraction has 12631 states and 50999 transitions. [2021-07-13 20:25:33,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:33,924 INFO L276 IsEmpty]: Start isEmpty. Operand 12631 states and 50999 transitions. [2021-07-13 20:25:33,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:25:33,959 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:33,959 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:34,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:34,181 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:34,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:34,181 INFO L82 PathProgramCache]: Analyzing trace with hash 493451422, now seen corresponding path program 11 times [2021-07-13 20:25:34,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:34,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272724222] [2021-07-13 20:25:34,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:34,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:34,203 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:34,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:34,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272724222] [2021-07-13 20:25:34,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272724222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:34,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956956795] [2021-07-13 20:25:34,204 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 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 20:25:34,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:25:34,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:34,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:25:34,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:34,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956956795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:34,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:34,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-07-13 20:25:34,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259878114] [2021-07-13 20:25:34,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:25:34,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:34,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:25:34,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:25:34,316 INFO L87 Difference]: Start difference. First operand 12631 states and 50999 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:34,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:34,644 INFO L93 Difference]: Finished difference Result 20596 states and 79596 transitions. [2021-07-13 20:25:34,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:25:34,645 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:25:34,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:34,702 INFO L225 Difference]: With dead ends: 20596 [2021-07-13 20:25:34,702 INFO L226 Difference]: Without dead ends: 20518 [2021-07-13 20:25:34,702 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:25:34,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20518 states. [2021-07-13 20:25:35,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20518 to 12577. [2021-07-13 20:25:35,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12577 states, 12576 states have (on average 4.042064249363868) internal successors, (50833), 12576 states have internal predecessors, (50833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:35,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12577 states to 12577 states and 50833 transitions. [2021-07-13 20:25:35,168 INFO L78 Accepts]: Start accepts. Automaton has 12577 states and 50833 transitions. Word has length 34 [2021-07-13 20:25:35,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:35,168 INFO L482 AbstractCegarLoop]: Abstraction has 12577 states and 50833 transitions. [2021-07-13 20:25:35,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:35,168 INFO L276 IsEmpty]: Start isEmpty. Operand 12577 states and 50833 transitions. [2021-07-13 20:25:35,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:25:35,201 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:35,201 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:35,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:35,402 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:35,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:35,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1356082631, now seen corresponding path program 12 times [2021-07-13 20:25:35,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:35,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236777401] [2021-07-13 20:25:35,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:35,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:35,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:35,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:35,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236777401] [2021-07-13 20:25:35,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236777401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:35,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314827296] [2021-07-13 20:25:35,424 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 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 20:25:35,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:25:35,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:35,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:25:35,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:35,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:35,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314827296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:35,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:35,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-07-13 20:25:35,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814470495] [2021-07-13 20:25:35,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:25:35,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:35,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:25:35,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:25:35,545 INFO L87 Difference]: Start difference. First operand 12577 states and 50833 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:35,707 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 9 [2021-07-13 20:25:35,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:35,926 INFO L93 Difference]: Finished difference Result 22733 states and 87606 transitions. [2021-07-13 20:25:35,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:25:35,926 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:25:35,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:36,059 INFO L225 Difference]: With dead ends: 22733 [2021-07-13 20:25:36,059 INFO L226 Difference]: Without dead ends: 21028 [2021-07-13 20:25:36,059 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 187.9ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:25:36,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21028 states. [2021-07-13 20:25:36,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21028 to 15386. [2021-07-13 20:25:36,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15386 states, 15385 states have (on average 4.0534936626584335) internal successors, (62363), 15385 states have internal predecessors, (62363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:36,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15386 states to 15386 states and 62363 transitions. [2021-07-13 20:25:36,432 INFO L78 Accepts]: Start accepts. Automaton has 15386 states and 62363 transitions. Word has length 34 [2021-07-13 20:25:36,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:36,432 INFO L482 AbstractCegarLoop]: Abstraction has 15386 states and 62363 transitions. [2021-07-13 20:25:36,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:36,432 INFO L276 IsEmpty]: Start isEmpty. Operand 15386 states and 62363 transitions. [2021-07-13 20:25:36,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:25:36,464 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:36,464 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:36,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-13 20:25:36,666 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:36,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:36,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1422790198, now seen corresponding path program 13 times [2021-07-13 20:25:36,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:36,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400696932] [2021-07-13 20:25:36,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:36,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:36,708 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:36,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:36,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400696932] [2021-07-13 20:25:36,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400696932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:36,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497721275] [2021-07-13 20:25:36,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:25:36,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:36,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:25:36,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:36,800 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:36,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497721275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:36,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:36,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-13 20:25:36,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281050424] [2021-07-13 20:25:36,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:25:36,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:36,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:25:36,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:25:36,802 INFO L87 Difference]: Start difference. First operand 15386 states and 62363 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:37,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:37,318 INFO L93 Difference]: Finished difference Result 31402 states and 124083 transitions. [2021-07-13 20:25:37,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:25:37,318 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:25:37,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:37,519 INFO L225 Difference]: With dead ends: 31402 [2021-07-13 20:25:37,519 INFO L226 Difference]: Without dead ends: 31094 [2021-07-13 20:25:37,520 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 102.3ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:25:37,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31094 states. [2021-07-13 20:25:37,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31094 to 19812. [2021-07-13 20:25:38,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19812 states, 19811 states have (on average 4.119024784210792) internal successors, (81602), 19811 states have internal predecessors, (81602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:38,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19812 states to 19812 states and 81602 transitions. [2021-07-13 20:25:38,174 INFO L78 Accepts]: Start accepts. Automaton has 19812 states and 81602 transitions. Word has length 34 [2021-07-13 20:25:38,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:38,174 INFO L482 AbstractCegarLoop]: Abstraction has 19812 states and 81602 transitions. [2021-07-13 20:25:38,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:38,174 INFO L276 IsEmpty]: Start isEmpty. Operand 19812 states and 81602 transitions. [2021-07-13 20:25:38,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:25:38,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:38,215 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:38,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:38,424 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:38,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:38,424 INFO L82 PathProgramCache]: Analyzing trace with hash 959184970, now seen corresponding path program 14 times [2021-07-13 20:25:38,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:38,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387327699] [2021-07-13 20:25:38,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:38,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:38,440 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:25:38,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:38,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387327699] [2021-07-13 20:25:38,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387327699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:38,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864284209] [2021-07-13 20:25:38,441 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 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 20:25:38,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:25:38,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:38,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:25:38,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:38,546 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:38,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864284209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:38,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:38,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-07-13 20:25:38,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097914439] [2021-07-13 20:25:38,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:25:38,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:38,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:25:38,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:25:38,548 INFO L87 Difference]: Start difference. First operand 19812 states and 81602 transitions. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:38,662 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2021-07-13 20:25:39,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:39,046 INFO L93 Difference]: Finished difference Result 33709 states and 133959 transitions. [2021-07-13 20:25:39,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:25:39,046 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:25:39,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:39,155 INFO L225 Difference]: With dead ends: 33709 [2021-07-13 20:25:39,155 INFO L226 Difference]: Without dead ends: 32656 [2021-07-13 20:25:39,156 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 175.2ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:25:39,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32656 states. [2021-07-13 20:25:39,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32656 to 23355. [2021-07-13 20:25:39,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23355 states, 23354 states have (on average 4.114370129314036) internal successors, (96087), 23354 states have internal predecessors, (96087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:39,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23355 states to 23355 states and 96087 transitions. [2021-07-13 20:25:39,873 INFO L78 Accepts]: Start accepts. Automaton has 23355 states and 96087 transitions. Word has length 34 [2021-07-13 20:25:39,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:39,873 INFO L482 AbstractCegarLoop]: Abstraction has 23355 states and 96087 transitions. [2021-07-13 20:25:39,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:39,873 INFO L276 IsEmpty]: Start isEmpty. Operand 23355 states and 96087 transitions. [2021-07-13 20:25:39,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:25:39,927 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:39,927 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:40,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 20:25:40,128 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:40,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:40,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1446275945, now seen corresponding path program 15 times [2021-07-13 20:25:40,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:40,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217323194] [2021-07-13 20:25:40,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:40,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:25:40,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:40,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217323194] [2021-07-13 20:25:40,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217323194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:40,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897383720] [2021-07-13 20:25:40,163 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 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 20:25:40,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:25:40,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:40,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:25:40,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:40,269 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:40,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897383720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:40,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:40,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-07-13 20:25:40,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143500661] [2021-07-13 20:25:40,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:25:40,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:40,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:25:40,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:25:40,270 INFO L87 Difference]: Start difference. First operand 23355 states and 96087 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:40,518 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-07-13 20:25:40,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:40,771 INFO L93 Difference]: Finished difference Result 31214 states and 125510 transitions. [2021-07-13 20:25:40,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:25:40,771 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:25:40,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:41,033 INFO L225 Difference]: With dead ends: 31214 [2021-07-13 20:25:41,033 INFO L226 Difference]: Without dead ends: 31106 [2021-07-13 20:25:41,033 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 209.0ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:25:41,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31106 states. [2021-07-13 20:25:41,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31106 to 24543. [2021-07-13 20:25:41,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24543 states, 24542 states have (on average 4.135033819574606) internal successors, (101482), 24542 states have internal predecessors, (101482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:41,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24543 states to 24543 states and 101482 transitions. [2021-07-13 20:25:41,705 INFO L78 Accepts]: Start accepts. Automaton has 24543 states and 101482 transitions. Word has length 34 [2021-07-13 20:25:41,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:41,705 INFO L482 AbstractCegarLoop]: Abstraction has 24543 states and 101482 transitions. [2021-07-13 20:25:41,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:41,705 INFO L276 IsEmpty]: Start isEmpty. Operand 24543 states and 101482 transitions. [2021-07-13 20:25:41,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:25:41,918 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:41,918 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:42,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:42,118 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:42,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:42,119 INFO L82 PathProgramCache]: Analyzing trace with hash 351777995, now seen corresponding path program 16 times [2021-07-13 20:25:42,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:42,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542652470] [2021-07-13 20:25:42,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:42,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:42,137 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-07-13 20:25:42,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:42,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542652470] [2021-07-13 20:25:42,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542652470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:42,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818306380] [2021-07-13 20:25:42,138 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 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 20:25:42,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:25:42,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:42,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:25:42,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:42,237 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-07-13 20:25:42,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818306380] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:25:42,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 20:25:42,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-07-13 20:25:42,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693362379] [2021-07-13 20:25:42,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:25:42,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:42,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:25:42,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:25:42,239 INFO L87 Difference]: Start difference. First operand 24543 states and 101482 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:42,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:42,404 INFO L93 Difference]: Finished difference Result 29524 states and 121533 transitions. [2021-07-13 20:25:42,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:25:42,404 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:25:42,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:42,659 INFO L225 Difference]: With dead ends: 29524 [2021-07-13 20:25:42,659 INFO L226 Difference]: Without dead ends: 29524 [2021-07-13 20:25:42,659 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:25:42,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29524 states. [2021-07-13 20:25:43,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29524 to 22120. [2021-07-13 20:25:43,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22120 states, 22119 states have (on average 4.096252090962521) internal successors, (90605), 22119 states have internal predecessors, (90605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:43,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22120 states to 22120 states and 90605 transitions. [2021-07-13 20:25:43,224 INFO L78 Accepts]: Start accepts. Automaton has 22120 states and 90605 transitions. Word has length 37 [2021-07-13 20:25:43,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:43,225 INFO L482 AbstractCegarLoop]: Abstraction has 22120 states and 90605 transitions. [2021-07-13 20:25:43,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:43,225 INFO L276 IsEmpty]: Start isEmpty. Operand 22120 states and 90605 transitions. [2021-07-13 20:25:43,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:25:43,273 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:43,273 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:43,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-13 20:25:43,474 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:43,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:43,474 INFO L82 PathProgramCache]: Analyzing trace with hash 2034805493, now seen corresponding path program 17 times [2021-07-13 20:25:43,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:43,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009060468] [2021-07-13 20:25:43,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:43,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:43,498 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-13 20:25:43,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:43,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009060468] [2021-07-13 20:25:43,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009060468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:43,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565264666] [2021-07-13 20:25:43,498 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 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 20:25:43,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:25:43,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:43,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:25:43,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:43,579 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-13 20:25:43,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565264666] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:25:43,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 20:25:43,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-07-13 20:25:43,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764562262] [2021-07-13 20:25:43,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:25:43,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:43,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:25:43,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:25:43,580 INFO L87 Difference]: Start difference. First operand 22120 states and 90605 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 20:25:43,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:43,897 INFO L93 Difference]: Finished difference Result 30000 states and 123549 transitions. [2021-07-13 20:25:43,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:25:43,898 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 37 [2021-07-13 20:25:43,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:44,003 INFO L225 Difference]: With dead ends: 30000 [2021-07-13 20:25:44,004 INFO L226 Difference]: Without dead ends: 30000 [2021-07-13 20:25:44,004 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:25:44,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30000 states. [2021-07-13 20:25:44,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30000 to 24376. [2021-07-13 20:25:44,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24376 states, 24375 states have (on average 4.091979487179487) internal successors, (99742), 24375 states have internal predecessors, (99742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:44,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24376 states to 24376 states and 99742 transitions. [2021-07-13 20:25:44,760 INFO L78 Accepts]: Start accepts. Automaton has 24376 states and 99742 transitions. Word has length 37 [2021-07-13 20:25:44,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:44,761 INFO L482 AbstractCegarLoop]: Abstraction has 24376 states and 99742 transitions. [2021-07-13 20:25:44,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 20:25:44,761 INFO L276 IsEmpty]: Start isEmpty. Operand 24376 states and 99742 transitions. [2021-07-13 20:25:44,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:25:44,814 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:44,814 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:45,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-13 20:25:45,015 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:45,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:45,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1631458869, now seen corresponding path program 18 times [2021-07-13 20:25:45,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:45,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040101515] [2021-07-13 20:25:45,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:45,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:45,032 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 20:25:45,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:45,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040101515] [2021-07-13 20:25:45,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040101515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:45,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881258323] [2021-07-13 20:25:45,032 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 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 20:25:45,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:25:45,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:45,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:25:45,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:45,106 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 20:25:45,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881258323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:45,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:45,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-07-13 20:25:45,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559744626] [2021-07-13 20:25:45,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:25:45,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:45,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:25:45,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:25:45,107 INFO L87 Difference]: Start difference. First operand 24376 states and 99742 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:45,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:45,352 INFO L93 Difference]: Finished difference Result 37294 states and 154370 transitions. [2021-07-13 20:25:45,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:25:45,352 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:25:45,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:45,660 INFO L225 Difference]: With dead ends: 37294 [2021-07-13 20:25:45,660 INFO L226 Difference]: Without dead ends: 37294 [2021-07-13 20:25:45,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:25:45,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37294 states. [2021-07-13 20:25:46,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37294 to 34517. [2021-07-13 20:25:46,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34517 states, 34516 states have (on average 4.136226677482907) internal successors, (142766), 34516 states have internal predecessors, (142766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:46,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34517 states to 34517 states and 142766 transitions. [2021-07-13 20:25:46,717 INFO L78 Accepts]: Start accepts. Automaton has 34517 states and 142766 transitions. Word has length 37 [2021-07-13 20:25:46,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:46,717 INFO L482 AbstractCegarLoop]: Abstraction has 34517 states and 142766 transitions. [2021-07-13 20:25:46,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:46,717 INFO L276 IsEmpty]: Start isEmpty. Operand 34517 states and 142766 transitions. [2021-07-13 20:25:46,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:25:46,824 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:46,824 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:47,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 20:25:47,024 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:47,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:47,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1763377011, now seen corresponding path program 19 times [2021-07-13 20:25:47,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:47,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040348164] [2021-07-13 20:25:47,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:47,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:47,408 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:47,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:47,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040348164] [2021-07-13 20:25:47,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040348164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:47,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975078696] [2021-07-13 20:25:47,409 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 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 20:25:47,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:47,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:25:47,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:47,613 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:25:47,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:25:47,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:47,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:47,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:47,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-07-13 20:25:47,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:25:47,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:47,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:47,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:47,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:25:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:47,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975078696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:47,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:47,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:25:47,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563468338] [2021-07-13 20:25:47,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:25:47,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:47,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:25:47,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:25:47,775 INFO L87 Difference]: Start difference. First operand 34517 states and 142766 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:49,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:49,850 INFO L93 Difference]: Finished difference Result 61929 states and 253070 transitions. [2021-07-13 20:25:49,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:25:49,851 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:25:49,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:50,296 INFO L225 Difference]: With dead ends: 61929 [2021-07-13 20:25:50,296 INFO L226 Difference]: Without dead ends: 61737 [2021-07-13 20:25:50,297 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1062.6ms TimeCoverageRelationStatistics Valid=305, Invalid=1417, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:25:50,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61737 states. [2021-07-13 20:25:51,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61737 to 34859. [2021-07-13 20:25:51,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34859 states, 34858 states have (on average 4.136668770440071) internal successors, (144196), 34858 states have internal predecessors, (144196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:51,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34859 states to 34859 states and 144196 transitions. [2021-07-13 20:25:51,471 INFO L78 Accepts]: Start accepts. Automaton has 34859 states and 144196 transitions. Word has length 39 [2021-07-13 20:25:51,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:51,471 INFO L482 AbstractCegarLoop]: Abstraction has 34859 states and 144196 transitions. [2021-07-13 20:25:51,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:51,471 INFO L276 IsEmpty]: Start isEmpty. Operand 34859 states and 144196 transitions. [2021-07-13 20:25:51,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:25:51,541 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:51,541 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:51,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-13 20:25:51,742 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:51,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:51,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1529459447, now seen corresponding path program 20 times [2021-07-13 20:25:51,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:51,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677571086] [2021-07-13 20:25:51,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:52,082 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:52,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:52,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677571086] [2021-07-13 20:25:52,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677571086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:52,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902390895] [2021-07-13 20:25:52,082 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 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 20:25:52,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:25:52,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:52,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:25:52,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:52,481 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:25:52,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:25:52,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:52,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:52,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:52,489 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-07-13 20:25:52,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:25:52,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:52,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:52,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:52,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:25:52,638 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:52,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902390895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:52,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:52,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:25:52,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022914053] [2021-07-13 20:25:52,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:25:52,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:52,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:25:52,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:25:52,639 INFO L87 Difference]: Start difference. First operand 34859 states and 144196 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:54,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:54,616 INFO L93 Difference]: Finished difference Result 62927 states and 257215 transitions. [2021-07-13 20:25:54,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:25:54,616 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:25:54,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:54,876 INFO L225 Difference]: With dead ends: 62927 [2021-07-13 20:25:54,876 INFO L226 Difference]: Without dead ends: 62711 [2021-07-13 20:25:54,876 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1322.7ms TimeCoverageRelationStatistics Valid=360, Invalid=1710, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:25:54,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62711 states. [2021-07-13 20:25:55,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62711 to 35009. [2021-07-13 20:25:55,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35009 states, 35008 states have (on average 4.135283363802559) internal successors, (144768), 35008 states have internal predecessors, (144768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:56,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35009 states to 35009 states and 144768 transitions. [2021-07-13 20:25:56,068 INFO L78 Accepts]: Start accepts. Automaton has 35009 states and 144768 transitions. Word has length 39 [2021-07-13 20:25:56,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:56,068 INFO L482 AbstractCegarLoop]: Abstraction has 35009 states and 144768 transitions. [2021-07-13 20:25:56,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:56,068 INFO L276 IsEmpty]: Start isEmpty. Operand 35009 states and 144768 transitions. [2021-07-13 20:25:56,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:25:56,144 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:56,144 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:56,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 20:25:56,345 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:56,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:56,345 INFO L82 PathProgramCache]: Analyzing trace with hash -953652233, now seen corresponding path program 21 times [2021-07-13 20:25:56,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:56,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595398851] [2021-07-13 20:25:56,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:56,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:56,659 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:56,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:56,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595398851] [2021-07-13 20:25:56,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595398851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:56,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335264725] [2021-07-13 20:25:56,660 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 20:25:56,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:25:56,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:56,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-13 20:25:56,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:56,893 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-07-13 20:25:57,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:57,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:57,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-07-13 20:25:57,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:57,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:57,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:57,062 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:91 [2021-07-13 20:25:57,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-07-13 20:25:57,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:57,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:57,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:57,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:20 [2021-07-13 20:25:57,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:57,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:25:57,232 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:25:57,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:57,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:25:57,241 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-13 20:25:57,290 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:57,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335264725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:57,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:57,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-13 20:25:57,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181623375] [2021-07-13 20:25:57,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:25:57,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:57,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:25:57,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:25:57,291 INFO L87 Difference]: Start difference. First operand 35009 states and 144768 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:59,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:59,810 INFO L93 Difference]: Finished difference Result 64186 states and 261937 transitions. [2021-07-13 20:25:59,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:25:59,810 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:25:59,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:00,046 INFO L225 Difference]: With dead ends: 64186 [2021-07-13 20:26:00,047 INFO L226 Difference]: Without dead ends: 64076 [2021-07-13 20:26:00,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 1749.1ms TimeCoverageRelationStatistics Valid=717, Invalid=3065, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:26:00,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64076 states. [2021-07-13 20:26:01,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64076 to 35529. [2021-07-13 20:26:01,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35529 states, 35528 states have (on average 4.1301790137356456) internal successors, (146737), 35528 states have internal predecessors, (146737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:01,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35529 states to 35529 states and 146737 transitions. [2021-07-13 20:26:01,350 INFO L78 Accepts]: Start accepts. Automaton has 35529 states and 146737 transitions. Word has length 39 [2021-07-13 20:26:01,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:01,350 INFO L482 AbstractCegarLoop]: Abstraction has 35529 states and 146737 transitions. [2021-07-13 20:26:01,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:01,350 INFO L276 IsEmpty]: Start isEmpty. Operand 35529 states and 146737 transitions. [2021-07-13 20:26:01,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:26:01,432 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:01,432 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:01,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:01,633 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:01,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:01,633 INFO L82 PathProgramCache]: Analyzing trace with hash -2033805687, now seen corresponding path program 22 times [2021-07-13 20:26:01,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:01,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338669640] [2021-07-13 20:26:01,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:01,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:01,906 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:01,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:01,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338669640] [2021-07-13 20:26:01,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338669640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:01,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834961258] [2021-07-13 20:26:01,906 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 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 20:26:01,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:26:01,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:01,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:26:01,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:02,098 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:26:02,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:26:02,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:02,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:02,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:02,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-07-13 20:26:02,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 20:26:02,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:02,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:02,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:02,180 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-07-13 20:26:02,242 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:02,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834961258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:02,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:02,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:26:02,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352038857] [2021-07-13 20:26:02,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:26:02,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:02,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:26:02,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:26:02,243 INFO L87 Difference]: Start difference. First operand 35529 states and 146737 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:02,552 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-07-13 20:26:04,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:04,215 INFO L93 Difference]: Finished difference Result 81268 states and 331701 transitions. [2021-07-13 20:26:04,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:26:04,215 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:26:04,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:04,534 INFO L225 Difference]: With dead ends: 81268 [2021-07-13 20:26:04,534 INFO L226 Difference]: Without dead ends: 81213 [2021-07-13 20:26:04,535 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1031.7ms TimeCoverageRelationStatistics Valid=338, Invalid=1642, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:26:04,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81213 states. [2021-07-13 20:26:05,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81213 to 35699. [2021-07-13 20:26:05,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35699 states, 35698 states have (on average 4.142865146506807) internal successors, (147892), 35698 states have internal predecessors, (147892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:06,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35699 states to 35699 states and 147892 transitions. [2021-07-13 20:26:06,011 INFO L78 Accepts]: Start accepts. Automaton has 35699 states and 147892 transitions. Word has length 39 [2021-07-13 20:26:06,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:06,011 INFO L482 AbstractCegarLoop]: Abstraction has 35699 states and 147892 transitions. [2021-07-13 20:26:06,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:06,011 INFO L276 IsEmpty]: Start isEmpty. Operand 35699 states and 147892 transitions. [2021-07-13 20:26:06,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:26:06,280 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:06,280 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:06,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-13 20:26:06,501 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:06,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:06,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1355985241, now seen corresponding path program 23 times [2021-07-13 20:26:06,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:06,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626853424] [2021-07-13 20:26:06,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:06,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:06,869 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:06,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:06,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626853424] [2021-07-13 20:26:06,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626853424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:06,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842433671] [2021-07-13 20:26:06,870 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 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 20:26:06,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:26:06,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:06,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:26:06,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:07,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:07,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:07,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:07,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:07,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 53 [2021-07-13 20:26:07,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:26:07,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:07,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:07,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:50 [2021-07-13 20:26:07,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:26:07,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:07,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:07,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:26:07,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-07-13 20:26:07,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:07,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:07,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:07,339 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:07,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-07-13 20:26:07,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:26:07,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:07,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:26:07,356 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-07-13 20:26:07,417 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:07,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842433671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:07,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:07,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-13 20:26:07,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108917097] [2021-07-13 20:26:07,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:26:07,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:07,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:26:07,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:26:07,418 INFO L87 Difference]: Start difference. First operand 35699 states and 147892 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:07,863 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-07-13 20:26:11,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:11,188 INFO L93 Difference]: Finished difference Result 67639 states and 276324 transitions. [2021-07-13 20:26:11,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:26:11,188 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:26:11,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:11,464 INFO L225 Difference]: With dead ends: 67639 [2021-07-13 20:26:11,464 INFO L226 Difference]: Without dead ends: 67418 [2021-07-13 20:26:11,465 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 2594.7ms TimeCoverageRelationStatistics Valid=710, Invalid=3982, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:26:11,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67418 states. [2021-07-13 20:26:12,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67418 to 36148. [2021-07-13 20:26:12,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36148 states, 36147 states have (on average 4.136857830525355) internal successors, (149535), 36147 states have internal predecessors, (149535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:12,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36148 states to 36148 states and 149535 transitions. [2021-07-13 20:26:12,776 INFO L78 Accepts]: Start accepts. Automaton has 36148 states and 149535 transitions. Word has length 39 [2021-07-13 20:26:12,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:12,776 INFO L482 AbstractCegarLoop]: Abstraction has 36148 states and 149535 transitions. [2021-07-13 20:26:12,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:12,777 INFO L276 IsEmpty]: Start isEmpty. Operand 36148 states and 149535 transitions. [2021-07-13 20:26:12,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:26:12,858 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:12,858 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:13,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:13,069 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:13,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:13,069 INFO L82 PathProgramCache]: Analyzing trace with hash -768675797, now seen corresponding path program 24 times [2021-07-13 20:26:13,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:13,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262645148] [2021-07-13 20:26:13,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:13,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:13,414 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:13,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:13,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262645148] [2021-07-13 20:26:13,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262645148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:13,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773481923] [2021-07-13 20:26:13,414 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 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 20:26:13,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:26:13,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:13,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:26:13,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:13,648 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-07-13 20:26:13,870 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:26:13,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-07-13 20:26:13,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:13,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:13,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:13,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-07-13 20:26:13,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:26:13,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:13,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:13,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:13,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:26:13,988 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:13,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773481923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:13,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:13,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:26:13,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156294087] [2021-07-13 20:26:13,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:26:13,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:13,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:26:13,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:26:13,989 INFO L87 Difference]: Start difference. First operand 36148 states and 149535 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:15,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:15,649 INFO L93 Difference]: Finished difference Result 77150 states and 313355 transitions. [2021-07-13 20:26:15,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:26:15,649 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:26:15,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:16,127 INFO L225 Difference]: With dead ends: 77150 [2021-07-13 20:26:16,127 INFO L226 Difference]: Without dead ends: 76966 [2021-07-13 20:26:16,128 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1129.2ms TimeCoverageRelationStatistics Valid=385, Invalid=1777, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:26:16,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76966 states. [2021-07-13 20:26:17,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76966 to 35834. [2021-07-13 20:26:17,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35834 states, 35833 states have (on average 4.141601317221555) internal successors, (148406), 35833 states have internal predecessors, (148406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:17,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35834 states to 35834 states and 148406 transitions. [2021-07-13 20:26:17,598 INFO L78 Accepts]: Start accepts. Automaton has 35834 states and 148406 transitions. Word has length 39 [2021-07-13 20:26:17,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:17,598 INFO L482 AbstractCegarLoop]: Abstraction has 35834 states and 148406 transitions. [2021-07-13 20:26:17,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:17,598 INFO L276 IsEmpty]: Start isEmpty. Operand 35834 states and 148406 transitions. [2021-07-13 20:26:17,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:26:17,681 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:17,681 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:17,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-13 20:26:17,882 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:17,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:17,883 INFO L82 PathProgramCache]: Analyzing trace with hash -789200017, now seen corresponding path program 25 times [2021-07-13 20:26:17,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:17,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716538306] [2021-07-13 20:26:17,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:17,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:18,225 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:18,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:18,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716538306] [2021-07-13 20:26:18,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716538306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:18,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001881831] [2021-07-13 20:26:18,226 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 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 20:26:18,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:18,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:26:18,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:18,645 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-07-13 20:26:18,725 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:26:18,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-07-13 20:26:18,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:18,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:18,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:18,732 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-07-13 20:26:18,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:26:18,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:18,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:18,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:18,767 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:26:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:18,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001881831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:18,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:18,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:26:18,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333225945] [2021-07-13 20:26:18,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:26:18,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:18,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:26:18,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:26:18,808 INFO L87 Difference]: Start difference. First operand 35834 states and 148406 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:20,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:20,312 INFO L93 Difference]: Finished difference Result 64096 states and 261990 transitions. [2021-07-13 20:26:20,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:26:20,312 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:26:20,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:20,562 INFO L225 Difference]: With dead ends: 64096 [2021-07-13 20:26:20,562 INFO L226 Difference]: Without dead ends: 63848 [2021-07-13 20:26:20,562 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1253.7ms TimeCoverageRelationStatistics Valid=352, Invalid=1454, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:26:20,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63848 states. [2021-07-13 20:26:21,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63848 to 36020. [2021-07-13 20:26:21,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36020 states, 36019 states have (on average 4.13964851883728) internal successors, (149106), 36019 states have internal predecessors, (149106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:21,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36020 states to 36020 states and 149106 transitions. [2021-07-13 20:26:21,816 INFO L78 Accepts]: Start accepts. Automaton has 36020 states and 149106 transitions. Word has length 39 [2021-07-13 20:26:21,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:21,816 INFO L482 AbstractCegarLoop]: Abstraction has 36020 states and 149106 transitions. [2021-07-13 20:26:21,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:21,816 INFO L276 IsEmpty]: Start isEmpty. Operand 36020 states and 149106 transitions. [2021-07-13 20:26:22,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:26:22,125 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:22,125 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:22,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:22,341 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:22,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:22,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1112900731, now seen corresponding path program 26 times [2021-07-13 20:26:22,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:22,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555568753] [2021-07-13 20:26:22,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:22,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:22,667 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:22,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:22,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555568753] [2021-07-13 20:26:22,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555568753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:22,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083790831] [2021-07-13 20:26:22,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:26:22,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:26:22,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:22,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:26:22,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:22,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:26:22,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:22,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:22,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:22,931 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-13 20:26:22,964 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:26:22,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-13 20:26:22,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:22,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:22,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:22,967 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:26:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:23,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083790831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:23,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:23,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:26:23,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677810395] [2021-07-13 20:26:23,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:26:23,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:23,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:26:23,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:26:23,011 INFO L87 Difference]: Start difference. First operand 36020 states and 149106 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:25,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:25,250 INFO L93 Difference]: Finished difference Result 81375 states and 330962 transitions. [2021-07-13 20:26:25,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:26:25,251 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:26:25,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:25,586 INFO L225 Difference]: With dead ends: 81375 [2021-07-13 20:26:25,586 INFO L226 Difference]: Without dead ends: 81223 [2021-07-13 20:26:25,586 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1141.2ms TimeCoverageRelationStatistics Valid=395, Invalid=1767, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:26:25,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81223 states. [2021-07-13 20:26:26,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81223 to 36090. [2021-07-13 20:26:26,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36090 states, 36089 states have (on average 4.140486020671118) internal successors, (149426), 36089 states have internal predecessors, (149426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:27,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36090 states to 36090 states and 149426 transitions. [2021-07-13 20:26:27,185 INFO L78 Accepts]: Start accepts. Automaton has 36090 states and 149426 transitions. Word has length 39 [2021-07-13 20:26:27,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:27,185 INFO L482 AbstractCegarLoop]: Abstraction has 36090 states and 149426 transitions. [2021-07-13 20:26:27,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:27,185 INFO L276 IsEmpty]: Start isEmpty. Operand 36090 states and 149426 transitions. [2021-07-13 20:26:27,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:26:27,274 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:27,274 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:27,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-13 20:26:27,474 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:27,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:27,475 INFO L82 PathProgramCache]: Analyzing trace with hash -908979985, now seen corresponding path program 27 times [2021-07-13 20:26:27,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:27,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899044963] [2021-07-13 20:26:27,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:27,828 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:27,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:27,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899044963] [2021-07-13 20:26:27,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899044963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:27,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35117550] [2021-07-13 20:26:27,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:26:27,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:26:27,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:27,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:26:27,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:28,131 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:28,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 49 [2021-07-13 20:26:28,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:28,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:28,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:28,150 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:74 [2021-07-13 20:26:28,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:28,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-07-13 20:26:28,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:28,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:28,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 38 [2021-07-13 20:26:28,213 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:28,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:28,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-07-13 20:26:28,218 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:28,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:28,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-07-13 20:26:28,222 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:28,267 INFO L628 ElimStorePlain]: treesize reduction 30, result has 68.4 percent of original size [2021-07-13 20:26:28,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:26:28,268 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:233, output treesize:65 [2021-07-13 20:26:28,341 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:28,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:26:28,342 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:26:28,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:28,381 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:28,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:26:28,383 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:26:28,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:28,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:26:28,425 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:88, output treesize:95 [2021-07-13 20:26:28,668 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2021-07-13 20:26:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:28,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35117550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:28,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:28,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-13 20:26:28,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402044094] [2021-07-13 20:26:28,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:26:28,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:28,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:26:28,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:26:28,810 INFO L87 Difference]: Start difference. First operand 36090 states and 149426 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:31,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:31,872 INFO L93 Difference]: Finished difference Result 64235 states and 260613 transitions. [2021-07-13 20:26:31,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:26:31,872 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:26:31,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:32,121 INFO L225 Difference]: With dead ends: 64235 [2021-07-13 20:26:32,121 INFO L226 Difference]: Without dead ends: 64063 [2021-07-13 20:26:32,122 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 2708.2ms TimeCoverageRelationStatistics Valid=889, Invalid=3271, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:26:32,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64063 states. [2021-07-13 20:26:33,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64063 to 36112. [2021-07-13 20:26:33,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36112 states, 36111 states have (on average 4.140289662429731) internal successors, (149510), 36111 states have internal predecessors, (149510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:33,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36112 states to 36112 states and 149510 transitions. [2021-07-13 20:26:33,382 INFO L78 Accepts]: Start accepts. Automaton has 36112 states and 149510 transitions. Word has length 39 [2021-07-13 20:26:33,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:33,382 INFO L482 AbstractCegarLoop]: Abstraction has 36112 states and 149510 transitions. [2021-07-13 20:26:33,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:33,382 INFO L276 IsEmpty]: Start isEmpty. Operand 36112 states and 149510 transitions. [2021-07-13 20:26:33,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:26:33,466 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:33,466 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:33,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:33,667 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:33,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:33,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1386806843, now seen corresponding path program 28 times [2021-07-13 20:26:33,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:33,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696614467] [2021-07-13 20:26:33,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:33,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:34,012 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:34,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:34,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696614467] [2021-07-13 20:26:34,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696614467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:34,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285700061] [2021-07-13 20:26:34,012 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 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 20:26:34,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:26:34,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:34,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:26:34,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:34,397 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-07-13 20:26:34,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:26:34,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:34,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:34,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:34,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-13 20:26:34,475 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:26:34,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-13 20:26:34,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:34,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:34,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:34,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:26:34,524 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:34,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285700061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:34,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:34,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:26:34,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040917359] [2021-07-13 20:26:34,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:26:34,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:34,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:26:34,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:26:34,525 INFO L87 Difference]: Start difference. First operand 36112 states and 149510 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:36,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:36,371 INFO L93 Difference]: Finished difference Result 81804 states and 333218 transitions. [2021-07-13 20:26:36,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:26:36,371 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:26:36,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:36,686 INFO L225 Difference]: With dead ends: 81804 [2021-07-13 20:26:36,686 INFO L226 Difference]: Without dead ends: 81722 [2021-07-13 20:26:36,687 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1304.2ms TimeCoverageRelationStatistics Valid=399, Invalid=1857, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:26:36,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81722 states. [2021-07-13 20:26:37,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81722 to 36088. [2021-07-13 20:26:37,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36088 states, 36087 states have (on average 4.143431152492587) internal successors, (149524), 36087 states have internal predecessors, (149524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:38,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36088 states to 36088 states and 149524 transitions. [2021-07-13 20:26:38,287 INFO L78 Accepts]: Start accepts. Automaton has 36088 states and 149524 transitions. Word has length 39 [2021-07-13 20:26:38,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:38,287 INFO L482 AbstractCegarLoop]: Abstraction has 36088 states and 149524 transitions. [2021-07-13 20:26:38,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:38,287 INFO L276 IsEmpty]: Start isEmpty. Operand 36088 states and 149524 transitions. [2021-07-13 20:26:38,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:26:38,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:38,367 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:38,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-13 20:26:38,567 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:38,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:38,568 INFO L82 PathProgramCache]: Analyzing trace with hash -835335761, now seen corresponding path program 29 times [2021-07-13 20:26:38,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:38,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556288200] [2021-07-13 20:26:38,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:38,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:38,871 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:38,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:38,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556288200] [2021-07-13 20:26:38,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556288200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:38,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367887636] [2021-07-13 20:26:38,871 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 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 20:26:38,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:26:38,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:38,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:26:38,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:39,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:39,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2021-07-13 20:26:39,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:39,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:39,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:39,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:42 [2021-07-13 20:26:39,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:26:39,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:39,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:39,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:39,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:22 [2021-07-13 20:26:39,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:39,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:39,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:39,300 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:39,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2021-07-13 20:26:39,304 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:26:39,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:39,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:26:39,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:19 [2021-07-13 20:26:39,362 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:39,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367887636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:39,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:39,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-13 20:26:39,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675361086] [2021-07-13 20:26:39,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:26:39,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:39,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:26:39,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:26:39,363 INFO L87 Difference]: Start difference. First operand 36088 states and 149524 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:43,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:43,334 INFO L93 Difference]: Finished difference Result 69670 states and 283586 transitions. [2021-07-13 20:26:43,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:26:43,334 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:26:43,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:43,591 INFO L225 Difference]: With dead ends: 69670 [2021-07-13 20:26:43,591 INFO L226 Difference]: Without dead ends: 69241 [2021-07-13 20:26:43,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 2693.6ms TimeCoverageRelationStatistics Valid=919, Invalid=5723, Unknown=0, NotChecked=0, Total=6642 [2021-07-13 20:26:43,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69241 states. [2021-07-13 20:26:44,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69241 to 36951. [2021-07-13 20:26:44,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36951 states, 36950 states have (on average 4.1375372124492555) internal successors, (152882), 36950 states have internal predecessors, (152882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:44,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36951 states to 36951 states and 152882 transitions. [2021-07-13 20:26:44,863 INFO L78 Accepts]: Start accepts. Automaton has 36951 states and 152882 transitions. Word has length 39 [2021-07-13 20:26:44,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:44,863 INFO L482 AbstractCegarLoop]: Abstraction has 36951 states and 152882 transitions. [2021-07-13 20:26:44,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:44,863 INFO L276 IsEmpty]: Start isEmpty. Operand 36951 states and 152882 transitions. [2021-07-13 20:26:44,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:26:44,942 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:44,942 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:45,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:45,142 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:45,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:45,142 INFO L82 PathProgramCache]: Analyzing trace with hash 976519855, now seen corresponding path program 30 times [2021-07-13 20:26:45,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:45,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621731315] [2021-07-13 20:26:45,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:45,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:45,408 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:45,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:45,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621731315] [2021-07-13 20:26:45,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621731315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:45,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369232685] [2021-07-13 20:26:45,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:26:45,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:26:45,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:45,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-13 20:26:45,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:45,737 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-07-13 20:26:45,781 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:26:45,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:26:45,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:45,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:45,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:45,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:24 [2021-07-13 20:26:45,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 20:26:45,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:45,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:45,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:45,826 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-07-13 20:26:45,872 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:45,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:26:45,881 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:26:45,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:45,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:26:45,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-13 20:26:45,940 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:45,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369232685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:45,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:45,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-07-13 20:26:45,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226652856] [2021-07-13 20:26:45,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:26:45,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:45,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:26:45,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:26:45,942 INFO L87 Difference]: Start difference. First operand 36951 states and 152882 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:48,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:48,108 INFO L93 Difference]: Finished difference Result 69773 states and 285641 transitions. [2021-07-13 20:26:48,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:26:48,108 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:26:48,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:48,516 INFO L225 Difference]: With dead ends: 69773 [2021-07-13 20:26:48,516 INFO L226 Difference]: Without dead ends: 69718 [2021-07-13 20:26:48,516 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 1395.4ms TimeCoverageRelationStatistics Valid=414, Invalid=2136, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:26:48,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69718 states. [2021-07-13 20:26:49,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69718 to 37115. [2021-07-13 20:26:49,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37115 states, 37114 states have (on average 4.138114997036159) internal successors, (153582), 37114 states have internal predecessors, (153582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:49,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37115 states to 37115 states and 153582 transitions. [2021-07-13 20:26:49,836 INFO L78 Accepts]: Start accepts. Automaton has 37115 states and 153582 transitions. Word has length 39 [2021-07-13 20:26:49,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:49,836 INFO L482 AbstractCegarLoop]: Abstraction has 37115 states and 153582 transitions. [2021-07-13 20:26:49,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:49,836 INFO L276 IsEmpty]: Start isEmpty. Operand 37115 states and 153582 transitions. [2021-07-13 20:26:49,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:26:49,923 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:49,923 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:50,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:50,123 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:50,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:50,124 INFO L82 PathProgramCache]: Analyzing trace with hash 747788741, now seen corresponding path program 31 times [2021-07-13 20:26:50,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:50,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237705449] [2021-07-13 20:26:50,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:50,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:50,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237705449] [2021-07-13 20:26:50,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237705449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:50,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977805516] [2021-07-13 20:26:50,451 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 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 20:26:50,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:50,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:26:50,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:50,662 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:26:50,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:26:50,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:50,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:50,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:50,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:31 [2021-07-13 20:26:50,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:26:50,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:50,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:50,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:50,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:26:50,774 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:50,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977805516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:50,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:50,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:26:50,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743632953] [2021-07-13 20:26:50,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:26:50,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:50,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:26:50,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:26:50,775 INFO L87 Difference]: Start difference. First operand 37115 states and 153582 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:52,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:52,950 INFO L93 Difference]: Finished difference Result 79233 states and 321882 transitions. [2021-07-13 20:26:52,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:26:52,951 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:26:52,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:53,271 INFO L225 Difference]: With dead ends: 79233 [2021-07-13 20:26:53,271 INFO L226 Difference]: Without dead ends: 79017 [2021-07-13 20:26:53,272 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1197.8ms TimeCoverageRelationStatistics Valid=437, Invalid=2215, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:26:53,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79017 states. [2021-07-13 20:26:54,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79017 to 36721. [2021-07-13 20:26:54,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36721 states, 36720 states have (on average 4.142184095860566) internal successors, (152101), 36720 states have internal predecessors, (152101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:54,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36721 states to 36721 states and 152101 transitions. [2021-07-13 20:26:54,917 INFO L78 Accepts]: Start accepts. Automaton has 36721 states and 152101 transitions. Word has length 39 [2021-07-13 20:26:54,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:54,918 INFO L482 AbstractCegarLoop]: Abstraction has 36721 states and 152101 transitions. [2021-07-13 20:26:54,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:54,918 INFO L276 IsEmpty]: Start isEmpty. Operand 36721 states and 152101 transitions. [2021-07-13 20:26:55,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:26:55,009 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:55,009 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:55,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-13 20:26:55,213 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:55,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:55,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1618032043, now seen corresponding path program 32 times [2021-07-13 20:26:55,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:55,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683801655] [2021-07-13 20:26:55,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:55,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:55,549 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:55,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:55,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683801655] [2021-07-13 20:26:55,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683801655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:55,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909464835] [2021-07-13 20:26:55,550 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 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 20:26:55,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:26:55,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:55,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:26:55,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:55,798 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:26:55,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-07-13 20:26:55,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:55,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:55,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:55,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-07-13 20:26:55,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:26:55,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:55,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:55,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:55,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:26:55,880 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:55,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909464835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:55,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:55,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:26:55,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32872750] [2021-07-13 20:26:55,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:26:55,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:55,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:26:55,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:26:55,881 INFO L87 Difference]: Start difference. First operand 36721 states and 152101 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:57,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:57,885 INFO L93 Difference]: Finished difference Result 65192 states and 266420 transitions. [2021-07-13 20:26:57,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:26:57,885 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:26:57,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:58,128 INFO L225 Difference]: With dead ends: 65192 [2021-07-13 20:26:58,128 INFO L226 Difference]: Without dead ends: 64944 [2021-07-13 20:26:58,129 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1028.8ms TimeCoverageRelationStatistics Valid=335, Invalid=1471, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:26:58,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64944 states. [2021-07-13 20:26:59,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64944 to 36907. [2021-07-13 20:26:59,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36907 states, 36906 states have (on average 4.140275293990137) internal successors, (152801), 36906 states have internal predecessors, (152801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:59,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36907 states to 36907 states and 152801 transitions. [2021-07-13 20:26:59,371 INFO L78 Accepts]: Start accepts. Automaton has 36907 states and 152801 transitions. Word has length 39 [2021-07-13 20:26:59,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:59,371 INFO L482 AbstractCegarLoop]: Abstraction has 36907 states and 152801 transitions. [2021-07-13 20:26:59,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:59,372 INFO L276 IsEmpty]: Start isEmpty. Operand 36907 states and 152801 transitions. [2021-07-13 20:26:59,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:26:59,450 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:59,450 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:59,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:59,665 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:59,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:59,665 INFO L82 PathProgramCache]: Analyzing trace with hash 980871553, now seen corresponding path program 33 times [2021-07-13 20:26:59,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:59,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327183415] [2021-07-13 20:26:59,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:59,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:59,992 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:59,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:59,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327183415] [2021-07-13 20:26:59,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327183415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:59,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884442601] [2021-07-13 20:26:59,992 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 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 20:27:00,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:27:00,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:00,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 20:27:00,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:00,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:00,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-07-13 20:27:00,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:00,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:00,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:27:00,615 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:64 [2021-07-13 20:27:00,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:00,720 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:00,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 45 [2021-07-13 20:27:00,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:00,733 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:27:00,733 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 26 treesize of output 22 [2021-07-13 20:27:00,734 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:00,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:00,750 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:00,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 45 [2021-07-13 20:27:00,752 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:00,761 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:27:00,761 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 26 treesize of output 22 [2021-07-13 20:27:00,763 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:00,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:00,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-13 20:27:00,850 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:233, output treesize:216 [2021-07-13 20:27:01,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:01,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:27:01,090 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:27:01,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:01,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:27:01,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:45 [2021-07-13 20:27:01,217 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:01,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884442601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:01,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:01,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-07-13 20:27:01,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974969898] [2021-07-13 20:27:01,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:27:01,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:01,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:27:01,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:27:01,219 INFO L87 Difference]: Start difference. First operand 36907 states and 152801 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:04,076 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 71 [2021-07-13 20:27:06,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:06,728 INFO L93 Difference]: Finished difference Result 77297 states and 311441 transitions. [2021-07-13 20:27:06,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-13 20:27:06,729 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:27:06,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:07,024 INFO L225 Difference]: With dead ends: 77297 [2021-07-13 20:27:07,024 INFO L226 Difference]: Without dead ends: 76962 [2021-07-13 20:27:07,026 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2466 ImplicationChecksByTransitivity, 4319.2ms TimeCoverageRelationStatistics Valid=1240, Invalid=6242, Unknown=0, NotChecked=0, Total=7482 [2021-07-13 20:27:07,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76962 states. [2021-07-13 20:27:08,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76962 to 37046. [2021-07-13 20:27:08,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37046 states, 37045 states have (on average 4.137454447293832) internal successors, (153272), 37045 states have internal predecessors, (153272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:08,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37046 states to 37046 states and 153272 transitions. [2021-07-13 20:27:08,479 INFO L78 Accepts]: Start accepts. Automaton has 37046 states and 153272 transitions. Word has length 39 [2021-07-13 20:27:08,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:08,480 INFO L482 AbstractCegarLoop]: Abstraction has 37046 states and 153272 transitions. [2021-07-13 20:27:08,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:08,480 INFO L276 IsEmpty]: Start isEmpty. Operand 37046 states and 153272 transitions. [2021-07-13 20:27:08,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:27:08,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:08,791 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:08,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-13 20:27:08,999 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:08,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:08,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1184792299, now seen corresponding path program 34 times [2021-07-13 20:27:08,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:08,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796136933] [2021-07-13 20:27:08,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:09,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:09,325 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:09,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:09,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796136933] [2021-07-13 20:27:09,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796136933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:09,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763645155] [2021-07-13 20:27:09,325 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 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 20:27:09,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:27:09,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:09,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:27:09,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:09,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:27:09,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:09,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:09,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:09,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-13 20:27:09,628 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:27:09,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-13 20:27:09,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:09,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:09,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:09,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:27:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:09,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763645155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:09,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:09,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:27:09,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132834428] [2021-07-13 20:27:09,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:27:09,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:09,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:27:09,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:27:09,682 INFO L87 Difference]: Start difference. First operand 37046 states and 153272 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:11,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:11,540 INFO L93 Difference]: Finished difference Result 69957 states and 285446 transitions. [2021-07-13 20:27:11,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:27:11,540 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:27:11,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:11,834 INFO L225 Difference]: With dead ends: 69957 [2021-07-13 20:27:11,834 INFO L226 Difference]: Without dead ends: 69867 [2021-07-13 20:27:11,834 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1104.6ms TimeCoverageRelationStatistics Valid=315, Invalid=1407, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:27:11,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69867 states. [2021-07-13 20:27:13,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69867 to 37170. [2021-07-13 20:27:13,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37170 states, 37169 states have (on average 4.137749199601819) internal successors, (153796), 37169 states have internal predecessors, (153796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:13,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37170 states to 37170 states and 153796 transitions. [2021-07-13 20:27:13,222 INFO L78 Accepts]: Start accepts. Automaton has 37170 states and 153796 transitions. Word has length 39 [2021-07-13 20:27:13,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:13,222 INFO L482 AbstractCegarLoop]: Abstraction has 37170 states and 153796 transitions. [2021-07-13 20:27:13,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:13,222 INFO L276 IsEmpty]: Start isEmpty. Operand 37170 states and 153796 transitions. [2021-07-13 20:27:13,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:27:13,308 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:13,308 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:13,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:13,508 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:13,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:13,508 INFO L82 PathProgramCache]: Analyzing trace with hash -946859157, now seen corresponding path program 35 times [2021-07-13 20:27:13,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:13,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564653591] [2021-07-13 20:27:13,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:13,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:13,826 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:13,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:13,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564653591] [2021-07-13 20:27:13,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564653591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:13,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076036540] [2021-07-13 20:27:13,827 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 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 20:27:13,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:27:13,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:13,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 20:27:13,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:14,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:27:14,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:14,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:14,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:27:14,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:44 [2021-07-13 20:27:14,366 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:14,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-07-13 20:27:14,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:14,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:14,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:27:14,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:37 [2021-07-13 20:27:14,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:14,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:14,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:14,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:14,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-07-13 20:27:14,523 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:27:14,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:14,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:27:14,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-07-13 20:27:14,588 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:14,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076036540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:14,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:14,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-13 20:27:14,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19601307] [2021-07-13 20:27:14,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:27:14,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:14,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:27:14,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:27:14,589 INFO L87 Difference]: Start difference. First operand 37170 states and 153796 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:20,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:20,775 INFO L93 Difference]: Finished difference Result 120785 states and 490537 transitions. [2021-07-13 20:27:20,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-13 20:27:20,776 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:27:20,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:21,543 INFO L225 Difference]: With dead ends: 120785 [2021-07-13 20:27:21,544 INFO L226 Difference]: Without dead ends: 120491 [2021-07-13 20:27:21,544 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2480 ImplicationChecksByTransitivity, 4117.0ms TimeCoverageRelationStatistics Valid=1442, Invalid=7114, Unknown=0, NotChecked=0, Total=8556 [2021-07-13 20:27:21,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120491 states. [2021-07-13 20:27:23,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120491 to 36914. [2021-07-13 20:27:23,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36914 states, 36913 states have (on average 4.138812884349687) internal successors, (152776), 36913 states have internal predecessors, (152776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:23,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36914 states to 36914 states and 152776 transitions. [2021-07-13 20:27:23,413 INFO L78 Accepts]: Start accepts. Automaton has 36914 states and 152776 transitions. Word has length 39 [2021-07-13 20:27:23,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:23,413 INFO L482 AbstractCegarLoop]: Abstraction has 36914 states and 152776 transitions. [2021-07-13 20:27:23,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:23,414 INFO L276 IsEmpty]: Start isEmpty. Operand 36914 states and 152776 transitions. [2021-07-13 20:27:23,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:27:23,765 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:23,765 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:23,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:23,981 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:23,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:23,981 INFO L82 PathProgramCache]: Analyzing trace with hash 475346227, now seen corresponding path program 36 times [2021-07-13 20:27:23,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:23,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932490813] [2021-07-13 20:27:23,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:23,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:24,241 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:24,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:24,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932490813] [2021-07-13 20:27:24,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932490813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:24,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790132724] [2021-07-13 20:27:24,242 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 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 20:27:24,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:27:24,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:24,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-13 20:27:24,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:24,521 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:24,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-07-13 20:27:24,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:24,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:24,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:27:24,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:60 [2021-07-13 20:27:24,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:24,639 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 21 [2021-07-13 20:27:24,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:27:24,665 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-07-13 20:27:24,666 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 49 [2021-07-13 20:27:24,667 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:24,678 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:27:24,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-07-13 20:27:24,680 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:24,708 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-07-13 20:27:24,708 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 32 treesize of output 46 [2021-07-13 20:27:24,710 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:24,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:24,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:27:24,788 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:217, output treesize:149 [2021-07-13 20:27:24,991 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:24,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:27:24,992 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:27:25,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:25,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:25,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-13 20:27:25,022 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:25,055 INFO L628 ElimStorePlain]: treesize reduction 22, result has 64.5 percent of original size [2021-07-13 20:27:25,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:27:25,057 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:74, output treesize:41 [2021-07-13 20:27:25,257 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-07-13 20:27:25,326 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:25,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790132724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:25,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:25,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-13 20:27:25,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952831733] [2021-07-13 20:27:25,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:27:25,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:25,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:27:25,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:27:25,327 INFO L87 Difference]: Start difference. First operand 36914 states and 152776 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:28,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:28,441 INFO L93 Difference]: Finished difference Result 72719 states and 295712 transitions. [2021-07-13 20:27:28,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:27:28,442 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:27:28,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:28,721 INFO L225 Difference]: With dead ends: 72719 [2021-07-13 20:27:28,721 INFO L226 Difference]: Without dead ends: 72609 [2021-07-13 20:27:28,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1401 ImplicationChecksByTransitivity, 2539.5ms TimeCoverageRelationStatistics Valid=875, Invalid=3681, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:27:28,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72609 states. [2021-07-13 20:27:29,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72609 to 37105. [2021-07-13 20:27:29,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37105 states, 37104 states have (on average 4.1379905131522206) internal successors, (153536), 37104 states have internal predecessors, (153536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:30,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37105 states to 37105 states and 153536 transitions. [2021-07-13 20:27:30,053 INFO L78 Accepts]: Start accepts. Automaton has 37105 states and 153536 transitions. Word has length 39 [2021-07-13 20:27:30,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:30,053 INFO L482 AbstractCegarLoop]: Abstraction has 37105 states and 153536 transitions. [2021-07-13 20:27:30,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:30,053 INFO L276 IsEmpty]: Start isEmpty. Operand 37105 states and 153536 transitions. [2021-07-13 20:27:30,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:27:30,134 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:30,134 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:30,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-13 20:27:30,334 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:30,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:30,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1206490683, now seen corresponding path program 37 times [2021-07-13 20:27:30,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:30,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144986375] [2021-07-13 20:27:30,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:30,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:30,823 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:30,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:30,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144986375] [2021-07-13 20:27:30,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144986375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:30,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144937080] [2021-07-13 20:27:30,823 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 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 20:27:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:30,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:27:30,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:31,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:27:31,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:31,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:31,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:31,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-13 20:27:31,115 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:27:31,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-07-13 20:27:31,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:31,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:31,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:31,117 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:15 [2021-07-13 20:27:31,186 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:31,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144937080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:31,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:31,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:27:31,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368472331] [2021-07-13 20:27:31,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:27:31,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:31,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:27:31,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:27:31,188 INFO L87 Difference]: Start difference. First operand 37105 states and 153536 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:33,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:33,258 INFO L93 Difference]: Finished difference Result 87448 states and 357230 transitions. [2021-07-13 20:27:33,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:27:33,258 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:27:33,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:33,667 INFO L225 Difference]: With dead ends: 87448 [2021-07-13 20:27:33,667 INFO L226 Difference]: Without dead ends: 87393 [2021-07-13 20:27:33,668 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 977.1ms TimeCoverageRelationStatistics Valid=350, Invalid=1630, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:27:33,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87393 states. [2021-07-13 20:27:34,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87393 to 37362. [2021-07-13 20:27:35,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37362 states, 37361 states have (on average 4.1416450309145905) internal successors, (154736), 37361 states have internal predecessors, (154736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:35,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37362 states to 37362 states and 154736 transitions. [2021-07-13 20:27:35,191 INFO L78 Accepts]: Start accepts. Automaton has 37362 states and 154736 transitions. Word has length 39 [2021-07-13 20:27:35,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:35,191 INFO L482 AbstractCegarLoop]: Abstraction has 37362 states and 154736 transitions. [2021-07-13 20:27:35,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:35,191 INFO L276 IsEmpty]: Start isEmpty. Operand 37362 states and 154736 transitions. [2021-07-13 20:27:35,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:27:35,272 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:35,272 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:35,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-13 20:27:35,473 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:35,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:35,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1832087599, now seen corresponding path program 38 times [2021-07-13 20:27:35,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:35,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255251121] [2021-07-13 20:27:35,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:35,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:35,750 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:35,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:35,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255251121] [2021-07-13 20:27:35,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255251121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:35,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599394476] [2021-07-13 20:27:35,751 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 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 20:27:35,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:27:35,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:35,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:27:35,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:36,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:27:36,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:36,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:36,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:36,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-13 20:27:36,224 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:27:36,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-13 20:27:36,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:36,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:36,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:36,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:27:36,267 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:36,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599394476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:36,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:36,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:27:36,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567201841] [2021-07-13 20:27:36,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:27:36,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:36,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:27:36,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:27:36,268 INFO L87 Difference]: Start difference. First operand 37362 states and 154736 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:37,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:37,755 INFO L93 Difference]: Finished difference Result 73280 states and 301017 transitions. [2021-07-13 20:27:37,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:27:37,756 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:27:37,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:38,191 INFO L225 Difference]: With dead ends: 73280 [2021-07-13 20:27:38,191 INFO L226 Difference]: Without dead ends: 73225 [2021-07-13 20:27:38,191 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 798.0ms TimeCoverageRelationStatistics Valid=318, Invalid=1322, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:27:38,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73225 states. [2021-07-13 20:27:39,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73225 to 37610. [2021-07-13 20:27:39,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37610 states, 37609 states have (on average 4.143263580525938) internal successors, (155824), 37609 states have internal predecessors, (155824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:39,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37610 states to 37610 states and 155824 transitions. [2021-07-13 20:27:39,331 INFO L78 Accepts]: Start accepts. Automaton has 37610 states and 155824 transitions. Word has length 39 [2021-07-13 20:27:39,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:39,331 INFO L482 AbstractCegarLoop]: Abstraction has 37610 states and 155824 transitions. [2021-07-13 20:27:39,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:39,331 INFO L276 IsEmpty]: Start isEmpty. Operand 37610 states and 155824 transitions. [2021-07-13 20:27:39,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:27:39,659 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:39,659 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:39,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-07-13 20:27:39,875 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:39,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:39,875 INFO L82 PathProgramCache]: Analyzing trace with hash -973527573, now seen corresponding path program 39 times [2021-07-13 20:27:39,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:39,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149789418] [2021-07-13 20:27:39,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:39,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:40,150 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:40,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:40,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149789418] [2021-07-13 20:27:40,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149789418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:40,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615064081] [2021-07-13 20:27:40,150 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 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 20:27:40,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:27:40,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:40,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:27:40,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:40,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:40,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-07-13 20:27:40,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:40,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:40,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:40,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:66 [2021-07-13 20:27:40,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:40,541 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:40,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-07-13 20:27:40,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:40,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:40,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:40,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-07-13 20:27:40,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:40,568 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:27:40,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-07-13 20:27:40,569 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:40,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:40,577 INFO L354 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2021-07-13 20:27:40,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 1 [2021-07-13 20:27:40,578 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:40,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:40,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:27:40,627 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:245, output treesize:189 [2021-07-13 20:27:40,736 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:40,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:27:40,738 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:27:40,849 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-07-13 20:27:40,850 INFO L628 ElimStorePlain]: treesize reduction 27, result has 83.5 percent of original size [2021-07-13 20:27:40,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:40,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:27:40,859 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:27:40,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:40,918 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:40,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:27:40,920 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:27:40,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:40,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:27:40,974 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:165, output treesize:152 [2021-07-13 20:27:41,327 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:41,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615064081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:41,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:41,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-13 20:27:41,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269391340] [2021-07-13 20:27:41,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:27:41,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:41,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:27:41,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:27:41,328 INFO L87 Difference]: Start difference. First operand 37610 states and 155824 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:41,906 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-07-13 20:27:42,955 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-07-13 20:27:43,857 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-07-13 20:27:44,169 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2021-07-13 20:27:45,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:45,351 INFO L93 Difference]: Finished difference Result 72090 states and 292918 transitions. [2021-07-13 20:27:45,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:27:45,352 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:27:45,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:45,652 INFO L225 Difference]: With dead ends: 72090 [2021-07-13 20:27:45,653 INFO L226 Difference]: Without dead ends: 71980 [2021-07-13 20:27:45,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 3202.4ms TimeCoverageRelationStatistics Valid=850, Invalid=3572, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:27:45,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71980 states. [2021-07-13 20:27:46,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71980 to 37688. [2021-07-13 20:27:46,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37688 states, 37687 states have (on average 4.1424894525963865) internal successors, (156118), 37687 states have internal predecessors, (156118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:47,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37688 states to 37688 states and 156118 transitions. [2021-07-13 20:27:47,090 INFO L78 Accepts]: Start accepts. Automaton has 37688 states and 156118 transitions. Word has length 39 [2021-07-13 20:27:47,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:47,090 INFO L482 AbstractCegarLoop]: Abstraction has 37688 states and 156118 transitions. [2021-07-13 20:27:47,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:47,090 INFO L276 IsEmpty]: Start isEmpty. Operand 37688 states and 156118 transitions. [2021-07-13 20:27:47,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:27:47,178 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:47,178 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:47,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:47,379 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:47,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:47,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1451354431, now seen corresponding path program 40 times [2021-07-13 20:27:47,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:47,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391753750] [2021-07-13 20:27:47,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:47,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:47,660 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:47,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:47,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391753750] [2021-07-13 20:27:47,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391753750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:47,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725300630] [2021-07-13 20:27:47,660 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 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 20:27:47,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:27:47,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:47,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:27:47,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:47,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:27:47,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:47,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:47,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:47,902 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-13 20:27:47,961 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:27:47,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-13 20:27:47,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:47,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:47,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:47,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:27:48,142 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-07-13 20:27:48,152 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:48,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725300630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:48,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:48,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:27:48,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925399744] [2021-07-13 20:27:48,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:27:48,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:48,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:27:48,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:27:48,153 INFO L87 Difference]: Start difference. First operand 37688 states and 156118 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:50,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:50,275 INFO L93 Difference]: Finished difference Result 86865 states and 355556 transitions. [2021-07-13 20:27:50,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:27:50,276 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:27:50,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:50,827 INFO L225 Difference]: With dead ends: 86865 [2021-07-13 20:27:50,827 INFO L226 Difference]: Without dead ends: 86810 [2021-07-13 20:27:50,828 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1022.6ms TimeCoverageRelationStatistics Valid=363, Invalid=1799, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:27:50,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86810 states. [2021-07-13 20:27:52,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86810 to 37742. [2021-07-13 20:27:52,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37742 states, 37741 states have (on average 4.146207042738666) internal successors, (156482), 37741 states have internal predecessors, (156482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:52,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37742 states to 37742 states and 156482 transitions. [2021-07-13 20:27:52,431 INFO L78 Accepts]: Start accepts. Automaton has 37742 states and 156482 transitions. Word has length 39 [2021-07-13 20:27:52,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:52,431 INFO L482 AbstractCegarLoop]: Abstraction has 37742 states and 156482 transitions. [2021-07-13 20:27:52,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:52,432 INFO L276 IsEmpty]: Start isEmpty. Operand 37742 states and 156482 transitions. [2021-07-13 20:27:52,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:27:52,520 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:52,520 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:52,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-07-13 20:27:52,720 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:52,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:52,721 INFO L82 PathProgramCache]: Analyzing trace with hash -653921383, now seen corresponding path program 41 times [2021-07-13 20:27:52,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:52,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365031934] [2021-07-13 20:27:52,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:53,070 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:53,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:53,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365031934] [2021-07-13 20:27:53,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365031934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:53,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945371054] [2021-07-13 20:27:53,071 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 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 20:27:53,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:27:53,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:53,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 20:27:53,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:53,479 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-07-13 20:27:53,544 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:53,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 49 [2021-07-13 20:27:53,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:53,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:53,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:53,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:50 [2021-07-13 20:27:53,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:27:53,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:53,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:53,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:27:53,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-07-13 20:27:53,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:53,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:53,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:53,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:53,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-07-13 20:27:53,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:27:53,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:53,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:27:53,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-07-13 20:27:53,827 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:53,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945371054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:53,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:53,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-13 20:27:53,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620665832] [2021-07-13 20:27:53,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:27:53,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:53,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:27:53,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:27:53,828 INFO L87 Difference]: Start difference. First operand 37742 states and 156482 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:57,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:57,565 INFO L93 Difference]: Finished difference Result 68588 states and 279888 transitions. [2021-07-13 20:27:57,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 20:27:57,566 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:27:57,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:57,839 INFO L225 Difference]: With dead ends: 68588 [2021-07-13 20:27:57,839 INFO L226 Difference]: Without dead ends: 68367 [2021-07-13 20:27:57,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 2863.6ms TimeCoverageRelationStatistics Valid=756, Invalid=4356, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:27:58,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68367 states. [2021-07-13 20:27:58,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68367 to 38069. [2021-07-13 20:27:59,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38069 states, 38068 states have (on average 4.141194704213513) internal successors, (157647), 38068 states have internal predecessors, (157647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:59,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38069 states to 38069 states and 157647 transitions. [2021-07-13 20:27:59,201 INFO L78 Accepts]: Start accepts. Automaton has 38069 states and 157647 transitions. Word has length 39 [2021-07-13 20:27:59,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:59,201 INFO L482 AbstractCegarLoop]: Abstraction has 38069 states and 157647 transitions. [2021-07-13 20:27:59,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:59,202 INFO L276 IsEmpty]: Start isEmpty. Operand 38069 states and 157647 transitions. [2021-07-13 20:27:59,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:27:59,527 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:59,527 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:59,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:59,733 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:59,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:59,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1516384875, now seen corresponding path program 42 times [2021-07-13 20:27:59,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:59,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846135627] [2021-07-13 20:27:59,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:59,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:00,072 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:00,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:00,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846135627] [2021-07-13 20:28:00,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846135627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:00,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5106741] [2021-07-13 20:28:00,073 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 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 20:28:00,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:28:00,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:00,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-13 20:28:00,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:00,385 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:28:00,385 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 31 treesize of output 19 [2021-07-13 20:28:00,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:00,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:00,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:28:00,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:28 [2021-07-13 20:28:00,486 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:00,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 41 [2021-07-13 20:28:00,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:00,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:00,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:28:00,498 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2021-07-13 20:28:00,592 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:00,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:28:00,594 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:28:00,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:00,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:28:00,614 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:51 [2021-07-13 20:28:00,726 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:00,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5106741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:00,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:00,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-07-13 20:28:00,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932318529] [2021-07-13 20:28:00,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:28:00,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:00,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:28:00,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:28:00,727 INFO L87 Difference]: Start difference. First operand 38069 states and 157647 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:05,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:05,630 INFO L93 Difference]: Finished difference Result 76057 states and 306680 transitions. [2021-07-13 20:28:05,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:28:05,631 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:28:05,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:05,957 INFO L225 Difference]: With dead ends: 76057 [2021-07-13 20:28:05,957 INFO L226 Difference]: Without dead ends: 75706 [2021-07-13 20:28:05,957 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2110 ImplicationChecksByTransitivity, 3390.7ms TimeCoverageRelationStatistics Valid=992, Invalid=5980, Unknown=0, NotChecked=0, Total=6972 [2021-07-13 20:28:06,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75706 states. [2021-07-13 20:28:07,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75706 to 37904. [2021-07-13 20:28:07,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37904 states, 37903 states have (on average 4.142891064031871) internal successors, (157028), 37903 states have internal predecessors, (157028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:07,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37904 states to 37904 states and 157028 transitions. [2021-07-13 20:28:07,424 INFO L78 Accepts]: Start accepts. Automaton has 37904 states and 157028 transitions. Word has length 39 [2021-07-13 20:28:07,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:07,424 INFO L482 AbstractCegarLoop]: Abstraction has 37904 states and 157028 transitions. [2021-07-13 20:28:07,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:07,425 INFO L276 IsEmpty]: Start isEmpty. Operand 37904 states and 157028 transitions. [2021-07-13 20:28:07,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:28:07,514 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:07,514 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:07,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-07-13 20:28:07,715 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:07,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:07,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1495860655, now seen corresponding path program 43 times [2021-07-13 20:28:07,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:07,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535248322] [2021-07-13 20:28:07,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:07,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:08,166 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-07-13 20:28:08,236 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:08,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:08,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535248322] [2021-07-13 20:28:08,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535248322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:08,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315960822] [2021-07-13 20:28:08,237 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 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 20:28:08,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:08,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:28:08,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:08,494 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:28:08,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-07-13 20:28:08,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:08,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:08,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:08,501 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-07-13 20:28:08,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:28:08,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:08,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:08,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:08,537 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:28:08,577 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:08,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315960822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:08,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:08,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:28:08,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685415844] [2021-07-13 20:28:08,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:28:08,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:08,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:28:08,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:28:08,578 INFO L87 Difference]: Start difference. First operand 37904 states and 157028 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:10,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:10,326 INFO L93 Difference]: Finished difference Result 66378 states and 271263 transitions. [2021-07-13 20:28:10,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:28:10,326 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:28:10,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:10,739 INFO L225 Difference]: With dead ends: 66378 [2021-07-13 20:28:10,739 INFO L226 Difference]: Without dead ends: 66130 [2021-07-13 20:28:10,739 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1259.0ms TimeCoverageRelationStatistics Valid=353, Invalid=1539, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:28:10,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66130 states. [2021-07-13 20:28:11,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66130 to 38078. [2021-07-13 20:28:11,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38078 states, 38077 states have (on average 4.141345168999659) internal successors, (157690), 38077 states have internal predecessors, (157690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:12,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38078 states to 38078 states and 157690 transitions. [2021-07-13 20:28:12,083 INFO L78 Accepts]: Start accepts. Automaton has 38078 states and 157690 transitions. Word has length 39 [2021-07-13 20:28:12,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:12,083 INFO L482 AbstractCegarLoop]: Abstraction has 38078 states and 157690 transitions. [2021-07-13 20:28:12,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:12,083 INFO L276 IsEmpty]: Start isEmpty. Operand 38078 states and 157690 transitions. [2021-07-13 20:28:12,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:28:12,222 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:12,222 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:12,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:12,423 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:12,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:12,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1172159941, now seen corresponding path program 44 times [2021-07-13 20:28:12,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:12,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694607307] [2021-07-13 20:28:12,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:12,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:12,767 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:12,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:12,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694607307] [2021-07-13 20:28:12,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694607307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:12,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563656260] [2021-07-13 20:28:12,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:28:12,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:28:12,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:12,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:28:12,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:13,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:28:13,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:13,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:13,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:13,031 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-13 20:28:13,064 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:28:13,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-13 20:28:13,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:13,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:13,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:13,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:28:13,109 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:13,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563656260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:13,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:13,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:28:13,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874764965] [2021-07-13 20:28:13,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:28:13,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:13,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:28:13,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:28:13,110 INFO L87 Difference]: Start difference. First operand 38078 states and 157690 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:13,737 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-07-13 20:28:15,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:15,250 INFO L93 Difference]: Finished difference Result 83791 states and 340816 transitions. [2021-07-13 20:28:15,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:28:15,251 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:28:15,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:15,580 INFO L225 Difference]: With dead ends: 83791 [2021-07-13 20:28:15,580 INFO L226 Difference]: Without dead ends: 83639 [2021-07-13 20:28:15,580 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1318.8ms TimeCoverageRelationStatistics Valid=399, Invalid=1857, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:28:15,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83639 states. [2021-07-13 20:28:16,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83639 to 38148. [2021-07-13 20:28:16,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38148 states, 38147 states have (on average 4.14213437491808) internal successors, (158010), 38147 states have internal predecessors, (158010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:17,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38148 states to 38148 states and 158010 transitions. [2021-07-13 20:28:17,101 INFO L78 Accepts]: Start accepts. Automaton has 38148 states and 158010 transitions. Word has length 39 [2021-07-13 20:28:17,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:17,101 INFO L482 AbstractCegarLoop]: Abstraction has 38148 states and 158010 transitions. [2021-07-13 20:28:17,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:17,102 INFO L276 IsEmpty]: Start isEmpty. Operand 38148 states and 158010 transitions. [2021-07-13 20:28:17,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:28:17,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:17,413 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:17,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:17,629 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:17,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:17,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1376080687, now seen corresponding path program 45 times [2021-07-13 20:28:17,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:17,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46082112] [2021-07-13 20:28:17,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:17,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:17,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:17,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46082112] [2021-07-13 20:28:17,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46082112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:17,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440217352] [2021-07-13 20:28:17,958 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 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 20:28:17,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:28:17,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:17,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:28:17,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:18,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:18,348 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:18,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 49 [2021-07-13 20:28:18,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:18,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:18,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:18,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:82 [2021-07-13 20:28:18,453 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:18,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-07-13 20:28:18,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:28:18,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:18,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:18,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 58 [2021-07-13 20:28:18,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:18,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:18,489 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:18,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-07-13 20:28:18,491 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:18,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:18,505 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:18,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-07-13 20:28:18,506 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:18,591 INFO L628 ElimStorePlain]: treesize reduction 58, result has 71.3 percent of original size [2021-07-13 20:28:18,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:28:18,605 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:247, output treesize:206 [2021-07-13 20:28:18,814 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-07-13 20:28:18,856 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:18,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:28:18,857 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:28:18,957 INFO L628 ElimStorePlain]: treesize reduction 24, result has 85.6 percent of original size [2021-07-13 20:28:18,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:18,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:28:18,966 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:28:19,065 INFO L628 ElimStorePlain]: treesize reduction 4, result has 97.2 percent of original size [2021-07-13 20:28:19,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:19,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:28:19,074 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:28:19,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:19,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:28:19,129 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:168, output treesize:154 [2021-07-13 20:28:19,342 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:19,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440217352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:19,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:19,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-13 20:28:19,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574451176] [2021-07-13 20:28:19,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:28:19,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:19,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:28:19,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:28:19,343 INFO L87 Difference]: Start difference. First operand 38148 states and 158010 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:22,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:22,642 INFO L93 Difference]: Finished difference Result 69869 states and 283258 transitions. [2021-07-13 20:28:22,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:28:22,642 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:28:22,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:23,107 INFO L225 Difference]: With dead ends: 69869 [2021-07-13 20:28:23,107 INFO L226 Difference]: Without dead ends: 69705 [2021-07-13 20:28:23,108 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 2637.7ms TimeCoverageRelationStatistics Valid=781, Invalid=3001, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:28:23,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69705 states. [2021-07-13 20:28:24,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69705 to 38170. [2021-07-13 20:28:24,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38170 states, 38169 states have (on average 4.1419476538552225) internal successors, (158094), 38169 states have internal predecessors, (158094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:24,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38170 states to 38170 states and 158094 transitions. [2021-07-13 20:28:24,290 INFO L78 Accepts]: Start accepts. Automaton has 38170 states and 158094 transitions. Word has length 39 [2021-07-13 20:28:24,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:24,291 INFO L482 AbstractCegarLoop]: Abstraction has 38170 states and 158094 transitions. [2021-07-13 20:28:24,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:24,291 INFO L276 IsEmpty]: Start isEmpty. Operand 38170 states and 158094 transitions. [2021-07-13 20:28:24,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:28:24,607 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:24,607 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:24,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2021-07-13 20:28:24,812 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:24,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:24,813 INFO L82 PathProgramCache]: Analyzing trace with hash 898253829, now seen corresponding path program 46 times [2021-07-13 20:28:24,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:24,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415458299] [2021-07-13 20:28:24,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:24,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:25,157 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:25,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:25,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415458299] [2021-07-13 20:28:25,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415458299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:25,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591904332] [2021-07-13 20:28:25,158 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 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 20:28:25,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:28:25,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:25,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:28:25,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:25,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:28:25,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:25,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:25,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:25,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-13 20:28:25,459 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:28:25,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-13 20:28:25,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:25,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:25,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:25,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:28:25,504 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:25,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591904332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:25,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:25,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:28:25,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246566210] [2021-07-13 20:28:25,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:28:25,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:25,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:28:25,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:28:25,506 INFO L87 Difference]: Start difference. First operand 38170 states and 158094 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:26,143 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-07-13 20:28:27,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:27,598 INFO L93 Difference]: Finished difference Result 84103 states and 342659 transitions. [2021-07-13 20:28:27,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:28:27,598 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:28:27,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:27,914 INFO L225 Difference]: With dead ends: 84103 [2021-07-13 20:28:27,915 INFO L226 Difference]: Without dead ends: 84021 [2021-07-13 20:28:27,915 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1285.1ms TimeCoverageRelationStatistics Valid=395, Invalid=1767, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:28:28,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84021 states. [2021-07-13 20:28:29,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84021 to 37868. [2021-07-13 20:28:29,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37868 states, 37867 states have (on average 4.143607890775609) internal successors, (156906), 37867 states have internal predecessors, (156906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:29,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37868 states to 37868 states and 156906 transitions. [2021-07-13 20:28:29,519 INFO L78 Accepts]: Start accepts. Automaton has 37868 states and 156906 transitions. Word has length 39 [2021-07-13 20:28:29,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:29,519 INFO L482 AbstractCegarLoop]: Abstraction has 37868 states and 156906 transitions. [2021-07-13 20:28:29,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:29,519 INFO L276 IsEmpty]: Start isEmpty. Operand 37868 states and 156906 transitions. [2021-07-13 20:28:29,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:28:29,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:29,881 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:30,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:30,097 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:30,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:30,097 INFO L82 PathProgramCache]: Analyzing trace with hash 575171183, now seen corresponding path program 47 times [2021-07-13 20:28:30,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:30,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313467247] [2021-07-13 20:28:30,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:30,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:30,462 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:30,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:30,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313467247] [2021-07-13 20:28:30,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313467247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:30,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754995177] [2021-07-13 20:28:30,462 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 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 20:28:30,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:28:30,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:30,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:28:30,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:30,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:30,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 47 [2021-07-13 20:28:30,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:30,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:30,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:28:30,801 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:57, output treesize:43 [2021-07-13 20:28:30,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-07-13 20:28:30,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:30,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:30,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:28:30,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:18 [2021-07-13 20:28:30,945 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:30,945 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-07-13 20:28:30,946 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:28:30,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:30,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:28:30,957 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:13 [2021-07-13 20:28:31,009 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:31,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754995177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:31,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:31,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-13 20:28:31,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828419526] [2021-07-13 20:28:31,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:28:31,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:31,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:28:31,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:28:31,011 INFO L87 Difference]: Start difference. First operand 37868 states and 156906 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:31,413 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-07-13 20:28:34,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:34,977 INFO L93 Difference]: Finished difference Result 72342 states and 294304 transitions. [2021-07-13 20:28:34,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:28:34,977 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:28:34,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:35,247 INFO L225 Difference]: With dead ends: 72342 [2021-07-13 20:28:35,247 INFO L226 Difference]: Without dead ends: 72001 [2021-07-13 20:28:35,247 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 2526.0ms TimeCoverageRelationStatistics Valid=672, Invalid=4020, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:28:35,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72001 states. [2021-07-13 20:28:36,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72001 to 38419. [2021-07-13 20:28:36,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38419 states, 38418 states have (on average 4.137045135092925) internal successors, (158937), 38418 states have internal predecessors, (158937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:36,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38419 states to 38419 states and 158937 transitions. [2021-07-13 20:28:36,603 INFO L78 Accepts]: Start accepts. Automaton has 38419 states and 158937 transitions. Word has length 39 [2021-07-13 20:28:36,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:36,603 INFO L482 AbstractCegarLoop]: Abstraction has 38419 states and 158937 transitions. [2021-07-13 20:28:36,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:36,603 INFO L276 IsEmpty]: Start isEmpty. Operand 38419 states and 158937 transitions. [2021-07-13 20:28:36,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:28:36,688 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:36,688 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:36,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-07-13 20:28:36,889 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:36,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:36,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1727088047, now seen corresponding path program 48 times [2021-07-13 20:28:36,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:36,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434831119] [2021-07-13 20:28:36,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:36,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:37,375 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-07-13 20:28:37,499 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:37,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:37,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434831119] [2021-07-13 20:28:37,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434831119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:37,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48202802] [2021-07-13 20:28:37,500 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:28:37,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:28:37,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:37,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-13 20:28:37,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:37,790 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:28:37,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:28:37,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:37,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:37,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:28:37,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:33 [2021-07-13 20:28:37,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-07-13 20:28:37,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:37,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:37,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:28:37,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:18 [2021-07-13 20:28:37,888 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:37,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-07-13 20:28:37,890 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:28:37,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:37,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:28:37,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:13 [2021-07-13 20:28:37,944 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:37,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48202802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:37,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:37,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-07-13 20:28:37,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901637177] [2021-07-13 20:28:37,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:28:37,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:37,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:28:37,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:28:37,945 INFO L87 Difference]: Start difference. First operand 38419 states and 158937 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:38,881 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-07-13 20:28:41,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:41,111 INFO L93 Difference]: Finished difference Result 91087 states and 370453 transitions. [2021-07-13 20:28:41,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:28:41,111 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:28:41,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:41,636 INFO L225 Difference]: With dead ends: 91087 [2021-07-13 20:28:41,636 INFO L226 Difference]: Without dead ends: 90900 [2021-07-13 20:28:41,636 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 2143.4ms TimeCoverageRelationStatistics Valid=576, Invalid=2964, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:28:41,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90900 states. [2021-07-13 20:28:42,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90900 to 38186. [2021-07-13 20:28:43,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38186 states, 38185 states have (on average 4.1405787612937015) internal successors, (158108), 38185 states have internal predecessors, (158108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:43,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38186 states to 38186 states and 158108 transitions. [2021-07-13 20:28:43,139 INFO L78 Accepts]: Start accepts. Automaton has 38186 states and 158108 transitions. Word has length 39 [2021-07-13 20:28:43,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:43,139 INFO L482 AbstractCegarLoop]: Abstraction has 38186 states and 158108 transitions. [2021-07-13 20:28:43,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:43,140 INFO L276 IsEmpty]: Start isEmpty. Operand 38186 states and 158108 transitions. [2021-07-13 20:28:43,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:28:43,219 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:43,219 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:43,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:43,420 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:43,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:43,420 INFO L82 PathProgramCache]: Analyzing trace with hash 251470469, now seen corresponding path program 49 times [2021-07-13 20:28:43,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:43,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831807519] [2021-07-13 20:28:43,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:43,745 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:43,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:43,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831807519] [2021-07-13 20:28:43,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831807519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:43,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956314271] [2021-07-13 20:28:43,746 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 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 20:28:43,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:43,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:28:43,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:44,081 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-07-13 20:28:44,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:28:44,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:44,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:44,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:44,193 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-13 20:28:44,222 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:28:44,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-13 20:28:44,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:44,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:44,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:44,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:28:44,265 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:44,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956314271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:44,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:44,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:28:44,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871976066] [2021-07-13 20:28:44,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:28:44,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:44,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:28:44,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:28:44,266 INFO L87 Difference]: Start difference. First operand 38186 states and 158108 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:46,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:46,148 INFO L93 Difference]: Finished difference Result 84472 states and 343708 transitions. [2021-07-13 20:28:46,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:28:46,148 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:28:46,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:46,643 INFO L225 Difference]: With dead ends: 84472 [2021-07-13 20:28:46,643 INFO L226 Difference]: Without dead ends: 84320 [2021-07-13 20:28:46,643 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1424.0ms TimeCoverageRelationStatistics Valid=411, Invalid=2039, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:28:46,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84320 states. [2021-07-13 20:28:47,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84320 to 38354. [2021-07-13 20:28:47,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38354 states, 38353 states have (on average 4.140797330065444) internal successors, (158812), 38353 states have internal predecessors, (158812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:48,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38354 states to 38354 states and 158812 transitions. [2021-07-13 20:28:48,118 INFO L78 Accepts]: Start accepts. Automaton has 38354 states and 158812 transitions. Word has length 39 [2021-07-13 20:28:48,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:48,118 INFO L482 AbstractCegarLoop]: Abstraction has 38354 states and 158812 transitions. [2021-07-13 20:28:48,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:48,118 INFO L276 IsEmpty]: Start isEmpty. Operand 38354 states and 158812 transitions. [2021-07-13 20:28:48,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:28:48,199 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:48,199 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:48,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-07-13 20:28:48,400 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:48,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:48,400 INFO L82 PathProgramCache]: Analyzing trace with hash 455391215, now seen corresponding path program 50 times [2021-07-13 20:28:48,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:48,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354610409] [2021-07-13 20:28:48,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:48,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:48,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:48,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354610409] [2021-07-13 20:28:48,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354610409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:48,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22446775] [2021-07-13 20:28:48,725 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 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 20:28:48,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:28:48,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:48,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:28:48,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:49,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:28:49,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:49,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:49,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:49,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-13 20:28:49,208 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:28:49,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-13 20:28:49,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:49,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:49,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:49,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:28:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:49,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22446775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:49,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:49,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:28:49,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66165184] [2021-07-13 20:28:49,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:28:49,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:49,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:28:49,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:28:49,253 INFO L87 Difference]: Start difference. First operand 38354 states and 158812 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:50,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:50,864 INFO L93 Difference]: Finished difference Result 72197 states and 294895 transitions. [2021-07-13 20:28:50,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:28:50,866 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:28:50,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:51,158 INFO L225 Difference]: With dead ends: 72197 [2021-07-13 20:28:51,158 INFO L226 Difference]: Without dead ends: 72091 [2021-07-13 20:28:51,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1193.7ms TimeCoverageRelationStatistics Valid=351, Invalid=1455, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:28:51,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72091 states. [2021-07-13 20:28:52,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72091 to 38120. [2021-07-13 20:28:52,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38120 states, 38119 states have (on average 4.141661638552953) internal successors, (157876), 38119 states have internal predecessors, (157876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:52,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38120 states to 38120 states and 157876 transitions. [2021-07-13 20:28:52,513 INFO L78 Accepts]: Start accepts. Automaton has 38120 states and 157876 transitions. Word has length 39 [2021-07-13 20:28:52,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:52,513 INFO L482 AbstractCegarLoop]: Abstraction has 38120 states and 157876 transitions. [2021-07-13 20:28:52,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:52,514 INFO L276 IsEmpty]: Start isEmpty. Operand 38120 states and 157876 transitions. [2021-07-13 20:28:52,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:28:52,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:52,836 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:53,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-07-13 20:28:53,052 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:53,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:53,053 INFO L82 PathProgramCache]: Analyzing trace with hash -175003259, now seen corresponding path program 51 times [2021-07-13 20:28:53,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:53,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167945992] [2021-07-13 20:28:53,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:53,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:53,355 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:53,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:53,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167945992] [2021-07-13 20:28:53,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167945992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:53,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896261198] [2021-07-13 20:28:53,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:53,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:28:53,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:53,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:28:53,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:53,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-07-13 20:28:53,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:53,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:53,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:28:53,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:35 [2021-07-13 20:28:53,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:53,682 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:53,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 45 [2021-07-13 20:28:53,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:53,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:53,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-13 20:28:53,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:71 [2021-07-13 20:28:53,763 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:53,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:28:53,764 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:28:53,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:53,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:28:53,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-13 20:28:53,816 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:53,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896261198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:53,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:53,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-13 20:28:53,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718311684] [2021-07-13 20:28:53,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:28:53,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:53,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:28:53,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:28:53,817 INFO L87 Difference]: Start difference. First operand 38120 states and 157876 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:57,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:57,638 INFO L93 Difference]: Finished difference Result 83885 states and 339235 transitions. [2021-07-13 20:28:57,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-13 20:28:57,638 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:28:57,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:57,963 INFO L225 Difference]: With dead ends: 83885 [2021-07-13 20:28:57,963 INFO L226 Difference]: Without dead ends: 83494 [2021-07-13 20:28:57,963 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 2426.0ms TimeCoverageRelationStatistics Valid=827, Invalid=4723, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:28:58,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83494 states. [2021-07-13 20:28:59,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83494 to 38451. [2021-07-13 20:28:59,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38451 states, 38450 states have (on average 4.140988296488946) internal successors, (159221), 38450 states have internal predecessors, (159221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:59,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38451 states to 38451 states and 159221 transitions. [2021-07-13 20:28:59,402 INFO L78 Accepts]: Start accepts. Automaton has 38451 states and 159221 transitions. Word has length 39 [2021-07-13 20:28:59,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:59,402 INFO L482 AbstractCegarLoop]: Abstraction has 38451 states and 159221 transitions. [2021-07-13 20:28:59,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:59,403 INFO L276 IsEmpty]: Start isEmpty. Operand 38451 states and 159221 transitions. [2021-07-13 20:28:59,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:28:59,683 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:59,683 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:59,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:59,897 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:59,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:59,897 INFO L82 PathProgramCache]: Analyzing trace with hash -448909371, now seen corresponding path program 52 times [2021-07-13 20:28:59,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:59,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590832743] [2021-07-13 20:28:59,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:59,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:00,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:00,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:00,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590832743] [2021-07-13 20:29:00,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590832743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:00,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69301742] [2021-07-13 20:29:00,198 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 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 20:29:00,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:29:00,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:00,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:29:00,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:00,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:29:00,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:00,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:00,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:00,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-13 20:29:00,466 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:29:00,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-13 20:29:00,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:00,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:00,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:00,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:29:00,509 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:00,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69301742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:00,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:00,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:29:00,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268137407] [2021-07-13 20:29:00,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:29:00,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:00,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:29:00,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:29:00,510 INFO L87 Difference]: Start difference. First operand 38451 states and 159221 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:02,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:02,519 INFO L93 Difference]: Finished difference Result 91888 states and 374497 transitions. [2021-07-13 20:29:02,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:29:02,520 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:29:02,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:02,901 INFO L225 Difference]: With dead ends: 91888 [2021-07-13 20:29:02,901 INFO L226 Difference]: Without dead ends: 91806 [2021-07-13 20:29:02,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1121.6ms TimeCoverageRelationStatistics Valid=379, Invalid=1783, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:29:03,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91806 states. [2021-07-13 20:29:04,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91806 to 38617. [2021-07-13 20:29:04,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38617 states, 38616 states have (on average 4.140692977004351) internal successors, (159897), 38616 states have internal predecessors, (159897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:04,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38617 states to 38617 states and 159897 transitions. [2021-07-13 20:29:04,562 INFO L78 Accepts]: Start accepts. Automaton has 38617 states and 159897 transitions. Word has length 39 [2021-07-13 20:29:04,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:04,562 INFO L482 AbstractCegarLoop]: Abstraction has 38617 states and 159897 transitions. [2021-07-13 20:29:04,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:04,562 INFO L276 IsEmpty]: Start isEmpty. Operand 38617 states and 159897 transitions. [2021-07-13 20:29:04,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:29:04,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:04,903 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:05,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-07-13 20:29:05,117 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:05,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:05,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1568844437, now seen corresponding path program 53 times [2021-07-13 20:29:05,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:05,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071238703] [2021-07-13 20:29:05,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:05,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:05,444 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:05,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:05,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071238703] [2021-07-13 20:29:05,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071238703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:05,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474520525] [2021-07-13 20:29:05,445 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 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 20:29:05,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:29:05,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:05,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 20:29:05,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:05,789 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:05,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 49 [2021-07-13 20:29:05,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:05,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:05,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:05,809 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:100 [2021-07-13 20:29:05,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:05,929 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:05,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 42 [2021-07-13 20:29:05,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:05,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:05,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:05,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:05,955 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:05,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2021-07-13 20:29:05,957 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-13 20:29:05,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:05,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:05,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:29:05,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:29:05,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 29 [2021-07-13 20:29:05,963 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:05,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:05,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:29:05,994 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:168, output treesize:90 [2021-07-13 20:29:06,075 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_10], 6=[q2]} [2021-07-13 20:29:06,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:06,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:06,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 32 [2021-07-13 20:29:06,091 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:06,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:06,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:06,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:06,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:06,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:06,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2021-07-13 20:29:06,140 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:29:06,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:06,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:29:06,175 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:110, output treesize:77 [2021-07-13 20:29:06,381 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-07-13 20:29:06,441 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:06,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474520525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:06,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:06,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:29:06,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955249816] [2021-07-13 20:29:06,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:29:06,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:06,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:29:06,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:29:06,442 INFO L87 Difference]: Start difference. First operand 38617 states and 159897 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:12,291 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 72 [2021-07-13 20:29:15,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:15,346 INFO L93 Difference]: Finished difference Result 103801 states and 418808 transitions. [2021-07-13 20:29:15,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-07-13 20:29:15,347 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:29:15,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:15,773 INFO L225 Difference]: With dead ends: 103801 [2021-07-13 20:29:15,773 INFO L226 Difference]: Without dead ends: 103476 [2021-07-13 20:29:15,774 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4998 ImplicationChecksByTransitivity, 7023.3ms TimeCoverageRelationStatistics Valid=2280, Invalid=12482, Unknown=0, NotChecked=0, Total=14762 [2021-07-13 20:29:16,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103476 states. [2021-07-13 20:29:17,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103476 to 38764. [2021-07-13 20:29:17,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38764 states, 38763 states have (on average 4.139566081056678) internal successors, (160462), 38763 states have internal predecessors, (160462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:17,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38764 states to 38764 states and 160462 transitions. [2021-07-13 20:29:17,599 INFO L78 Accepts]: Start accepts. Automaton has 38764 states and 160462 transitions. Word has length 39 [2021-07-13 20:29:17,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:17,599 INFO L482 AbstractCegarLoop]: Abstraction has 38764 states and 160462 transitions. [2021-07-13 20:29:17,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:17,599 INFO L276 IsEmpty]: Start isEmpty. Operand 38764 states and 160462 transitions. [2021-07-13 20:29:17,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:29:17,682 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:17,683 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:17,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-07-13 20:29:17,897 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:17,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:17,897 INFO L82 PathProgramCache]: Analyzing trace with hash -259731149, now seen corresponding path program 54 times [2021-07-13 20:29:17,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:17,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776280505] [2021-07-13 20:29:17,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:17,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:18,209 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:18,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:18,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776280505] [2021-07-13 20:29:18,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776280505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:18,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62059826] [2021-07-13 20:29:18,209 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 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 20:29:18,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:29:18,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:18,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 20:29:18,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:18,506 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:18,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 20:29:18,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:18,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:18,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:29:18,562 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:64, output treesize:69 [2021-07-13 20:29:18,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:18,912 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:18,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 38 [2021-07-13 20:29:18,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:18,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:18,932 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:18,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 36 [2021-07-13 20:29:18,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:18,945 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:18,945 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2021-07-13 20:29:18,946 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-13 20:29:18,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:18,956 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:29:18,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 1 [2021-07-13 20:29:18,957 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:19,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:19,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:29:19,044 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:246, output treesize:116 [2021-07-13 20:29:19,209 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:19,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:29:19,210 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:29:19,293 INFO L628 ElimStorePlain]: treesize reduction 21, result has 83.2 percent of original size [2021-07-13 20:29:19,300 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:19,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:29:19,301 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:29:19,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:19,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:29:19,344 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:126, output treesize:112 [2021-07-13 20:29:19,555 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:19,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62059826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:19,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:19,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-13 20:29:19,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204709052] [2021-07-13 20:29:19,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:29:19,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:19,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:29:19,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:29:19,556 INFO L87 Difference]: Start difference. First operand 38764 states and 160462 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:19,887 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-07-13 20:29:20,816 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-07-13 20:29:23,290 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-07-13 20:29:23,505 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-07-13 20:29:23,902 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-07-13 20:29:24,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:24,448 INFO L93 Difference]: Finished difference Result 74351 states and 301109 transitions. [2021-07-13 20:29:24,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:29:24,448 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:29:24,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:24,714 INFO L225 Difference]: With dead ends: 74351 [2021-07-13 20:29:24,714 INFO L226 Difference]: Without dead ends: 74179 [2021-07-13 20:29:24,714 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 4143.8ms TimeCoverageRelationStatistics Valid=1204, Invalid=4958, Unknown=0, NotChecked=0, Total=6162 [2021-07-13 20:29:24,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74179 states. [2021-07-13 20:29:25,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74179 to 38810. [2021-07-13 20:29:25,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38810 states, 38809 states have (on average 4.139194516735809) internal successors, (160638), 38809 states have internal predecessors, (160638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:26,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38810 states to 38810 states and 160638 transitions. [2021-07-13 20:29:26,124 INFO L78 Accepts]: Start accepts. Automaton has 38810 states and 160638 transitions. Word has length 39 [2021-07-13 20:29:26,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:26,124 INFO L482 AbstractCegarLoop]: Abstraction has 38810 states and 160638 transitions. [2021-07-13 20:29:26,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:26,124 INFO L276 IsEmpty]: Start isEmpty. Operand 38810 states and 160638 transitions. [2021-07-13 20:29:26,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:29:26,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:26,215 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:26,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:26,416 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:26,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:26,416 INFO L82 PathProgramCache]: Analyzing trace with hash -737558007, now seen corresponding path program 55 times [2021-07-13 20:29:26,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:26,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121227162] [2021-07-13 20:29:26,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:26,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:26,937 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:26,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:26,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121227162] [2021-07-13 20:29:26,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121227162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:26,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149887941] [2021-07-13 20:29:26,937 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 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 20:29:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:26,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:29:26,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:27,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:29:27,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:27,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:27,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:27,174 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-13 20:29:27,204 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:29:27,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-07-13 20:29:27,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:27,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:27,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:27,206 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-07-13 20:29:27,267 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:27,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149887941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:27,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:27,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:29:27,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405425754] [2021-07-13 20:29:27,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:29:27,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:27,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:29:27,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:29:27,268 INFO L87 Difference]: Start difference. First operand 38810 states and 160638 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:28,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:28,966 INFO L93 Difference]: Finished difference Result 90479 states and 368460 transitions. [2021-07-13 20:29:28,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:29:28,967 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:29:28,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:29,515 INFO L225 Difference]: With dead ends: 90479 [2021-07-13 20:29:29,515 INFO L226 Difference]: Without dead ends: 90397 [2021-07-13 20:29:29,516 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1187.2ms TimeCoverageRelationStatistics Valid=356, Invalid=1714, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:29:29,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90397 states. [2021-07-13 20:29:30,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90397 to 38948. [2021-07-13 20:29:31,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38948 states, 38947 states have (on average 4.1378796826456465) internal successors, (161158), 38947 states have internal predecessors, (161158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:31,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38948 states to 38948 states and 161158 transitions. [2021-07-13 20:29:31,162 INFO L78 Accepts]: Start accepts. Automaton has 38948 states and 161158 transitions. Word has length 39 [2021-07-13 20:29:31,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:31,162 INFO L482 AbstractCegarLoop]: Abstraction has 38948 states and 161158 transitions. [2021-07-13 20:29:31,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:31,162 INFO L276 IsEmpty]: Start isEmpty. Operand 38948 states and 161158 transitions. [2021-07-13 20:29:31,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:29:31,252 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:31,252 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:31,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:31,452 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:31,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:31,453 INFO L82 PathProgramCache]: Analyzing trace with hash -707566413, now seen corresponding path program 56 times [2021-07-13 20:29:31,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:31,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577292150] [2021-07-13 20:29:31,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:31,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:31,937 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:31,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:31,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577292150] [2021-07-13 20:29:31,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577292150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:31,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291049008] [2021-07-13 20:29:31,937 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 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 20:29:32,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:29:32,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:32,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:29:32,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:32,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:29:32,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:32,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:32,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:32,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-13 20:29:32,286 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:29:32,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-13 20:29:32,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:32,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:32,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:32,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:29:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:32,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291049008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:32,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:32,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:29:32,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292086841] [2021-07-13 20:29:32,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:29:32,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:32,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:29:32,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:29:32,352 INFO L87 Difference]: Start difference. First operand 38948 states and 161158 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:33,597 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-07-13 20:29:35,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:35,032 INFO L93 Difference]: Finished difference Result 111695 states and 453391 transitions. [2021-07-13 20:29:35,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:29:35,032 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:29:35,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:35,754 INFO L225 Difference]: With dead ends: 111695 [2021-07-13 20:29:35,754 INFO L226 Difference]: Without dead ends: 111575 [2021-07-13 20:29:35,754 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1461.1ms TimeCoverageRelationStatistics Valid=462, Invalid=2294, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:29:35,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111575 states. [2021-07-13 20:29:37,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111575 to 38320. [2021-07-13 20:29:37,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38320 states, 38319 states have (on average 4.140922257887732) internal successors, (158676), 38319 states have internal predecessors, (158676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:37,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38320 states to 38320 states and 158676 transitions. [2021-07-13 20:29:37,547 INFO L78 Accepts]: Start accepts. Automaton has 38320 states and 158676 transitions. Word has length 39 [2021-07-13 20:29:37,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:37,547 INFO L482 AbstractCegarLoop]: Abstraction has 38320 states and 158676 transitions. [2021-07-13 20:29:37,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:37,547 INFO L276 IsEmpty]: Start isEmpty. Operand 38320 states and 158676 transitions. [2021-07-13 20:29:37,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:29:37,633 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:37,633 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:37,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:37,833 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:37,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:37,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1646067281, now seen corresponding path program 57 times [2021-07-13 20:29:37,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:37,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148192031] [2021-07-13 20:29:37,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:37,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:38,339 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:38,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:38,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148192031] [2021-07-13 20:29:38,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148192031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:38,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140538404] [2021-07-13 20:29:38,339 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 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 20:29:38,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:29:38,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:38,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:29:38,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:38,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:38,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:38,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-07-13 20:29:38,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:38,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:38,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:38,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:87 [2021-07-13 20:29:38,774 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:38,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 41 [2021-07-13 20:29:38,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:38,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:38,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:29:38,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2021-07-13 20:29:38,845 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:38,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:29:38,847 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:29:38,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:38,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:29:38,867 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:47 [2021-07-13 20:29:39,041 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:39,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140538404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:39,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:39,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-07-13 20:29:39,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603899405] [2021-07-13 20:29:39,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:29:39,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:39,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:29:39,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:29:39,042 INFO L87 Difference]: Start difference. First operand 38320 states and 158676 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:43,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:43,917 INFO L93 Difference]: Finished difference Result 66215 states and 267753 transitions. [2021-07-13 20:29:43,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-07-13 20:29:43,918 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:29:43,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:44,178 INFO L225 Difference]: With dead ends: 66215 [2021-07-13 20:29:44,179 INFO L226 Difference]: Without dead ends: 66067 [2021-07-13 20:29:44,179 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2474 ImplicationChecksByTransitivity, 4056.6ms TimeCoverageRelationStatistics Valid=977, Invalid=6855, Unknown=0, NotChecked=0, Total=7832 [2021-07-13 20:29:44,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66067 states. [2021-07-13 20:29:45,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66067 to 38912. [2021-07-13 20:29:45,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38912 states, 38911 states have (on average 4.136722263627252) internal successors, (160964), 38911 states have internal predecessors, (160964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:45,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38912 states to 38912 states and 160964 transitions. [2021-07-13 20:29:45,596 INFO L78 Accepts]: Start accepts. Automaton has 38912 states and 160964 transitions. Word has length 39 [2021-07-13 20:29:45,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:45,596 INFO L482 AbstractCegarLoop]: Abstraction has 38912 states and 160964 transitions. [2021-07-13 20:29:45,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:45,596 INFO L276 IsEmpty]: Start isEmpty. Operand 38912 states and 160964 transitions. [2021-07-13 20:29:45,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:29:45,686 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:45,686 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:45,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable274 [2021-07-13 20:29:45,886 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:45,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:45,887 INFO L82 PathProgramCache]: Analyzing trace with hash 967063105, now seen corresponding path program 58 times [2021-07-13 20:29:45,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:45,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408271807] [2021-07-13 20:29:45,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:45,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:46,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:46,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408271807] [2021-07-13 20:29:46,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408271807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:46,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582172987] [2021-07-13 20:29:46,207 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 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 20:29:46,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:29:46,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:46,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:29:46,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:46,443 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:29:46,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:29:46,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:46,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:46,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:46,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-07-13 20:29:46,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:29:46,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:46,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:46,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:46,522 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:29:46,562 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:46,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582172987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:46,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:46,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:29:46,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002473979] [2021-07-13 20:29:46,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:29:46,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:46,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:29:46,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:29:46,564 INFO L87 Difference]: Start difference. First operand 38912 states and 160964 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:48,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:48,915 INFO L93 Difference]: Finished difference Result 85324 states and 346778 transitions. [2021-07-13 20:29:48,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:29:48,915 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:29:48,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:49,275 INFO L225 Difference]: With dead ends: 85324 [2021-07-13 20:29:49,275 INFO L226 Difference]: Without dead ends: 85108 [2021-07-13 20:29:49,275 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1305.6ms TimeCoverageRelationStatistics Valid=439, Invalid=2423, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:29:49,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85108 states. [2021-07-13 20:29:50,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85108 to 38662. [2021-07-13 20:29:50,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38662 states, 38661 states have (on average 4.14127932541838) internal successors, (160106), 38661 states have internal predecessors, (160106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:50,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38662 states to 38662 states and 160106 transitions. [2021-07-13 20:29:50,867 INFO L78 Accepts]: Start accepts. Automaton has 38662 states and 160106 transitions. Word has length 39 [2021-07-13 20:29:50,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:50,868 INFO L482 AbstractCegarLoop]: Abstraction has 38662 states and 160106 transitions. [2021-07-13 20:29:50,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:50,868 INFO L276 IsEmpty]: Start isEmpty. Operand 38662 states and 160106 transitions. [2021-07-13 20:29:50,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:29:50,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:50,958 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:51,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:51,158 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:51,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:51,159 INFO L82 PathProgramCache]: Analyzing trace with hash 165788335, now seen corresponding path program 59 times [2021-07-13 20:29:51,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:51,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841595749] [2021-07-13 20:29:51,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:51,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:51,665 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:51,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:51,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841595749] [2021-07-13 20:29:51,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841595749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:51,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988605076] [2021-07-13 20:29:51,666 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:51,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:29:51,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:51,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-13 20:29:51,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:51,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:51,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:51,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:51,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:51,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2021-07-13 20:29:51,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:29:51,904 INFO L628 ElimStorePlain]: treesize reduction 37, result has 51.3 percent of original size [2021-07-13 20:29:51,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:51,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:40 [2021-07-13 20:29:51,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-07-13 20:29:51,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:51,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:51,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:51,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:14 [2021-07-13 20:29:52,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:52,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:52,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:52,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:52,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2021-07-13 20:29:52,025 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:29:52,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:52,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:29:52,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:19 [2021-07-13 20:29:52,074 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:52,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988605076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:52,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:52,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-13 20:29:52,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773708483] [2021-07-13 20:29:52,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:29:52,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:52,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:29:52,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:29:52,075 INFO L87 Difference]: Start difference. First operand 38662 states and 160106 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:55,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:55,132 INFO L93 Difference]: Finished difference Result 64664 states and 263109 transitions. [2021-07-13 20:29:55,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:29:55,133 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:29:55,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:55,362 INFO L225 Difference]: With dead ends: 64664 [2021-07-13 20:29:55,362 INFO L226 Difference]: Without dead ends: 64554 [2021-07-13 20:29:55,362 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 2110.5ms TimeCoverageRelationStatistics Valid=687, Invalid=4005, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:29:55,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64554 states. [2021-07-13 20:29:56,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64554 to 38976. [2021-07-13 20:29:56,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38976 states, 38975 states have (on average 4.139345734445157) internal successors, (161331), 38975 states have internal predecessors, (161331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:56,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38976 states to 38976 states and 161331 transitions. [2021-07-13 20:29:56,717 INFO L78 Accepts]: Start accepts. Automaton has 38976 states and 161331 transitions. Word has length 39 [2021-07-13 20:29:56,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:56,717 INFO L482 AbstractCegarLoop]: Abstraction has 38976 states and 161331 transitions. [2021-07-13 20:29:56,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:56,717 INFO L276 IsEmpty]: Start isEmpty. Operand 38976 states and 161331 transitions. [2021-07-13 20:29:56,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:29:56,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:56,810 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:57,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:57,010 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:57,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:57,011 INFO L82 PathProgramCache]: Analyzing trace with hash -560742591, now seen corresponding path program 60 times [2021-07-13 20:29:57,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:57,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551658275] [2021-07-13 20:29:57,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:57,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:57,489 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:57,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:57,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551658275] [2021-07-13 20:29:57,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551658275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:57,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427243004] [2021-07-13 20:29:57,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:29:57,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:29:57,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:57,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 20:29:57,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:57,689 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:29:57,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:29:57,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:57,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:57,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:57,696 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:24 [2021-07-13 20:29:57,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 20:29:57,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:57,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:57,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:57,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-07-13 20:29:57,769 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:57,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:29:57,771 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:29:57,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:57,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:29:57,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-13 20:29:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:57,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427243004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:57,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:57,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-07-13 20:29:57,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947642683] [2021-07-13 20:29:57,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:29:57,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:57,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:29:57,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:29:57,818 INFO L87 Difference]: Start difference. First operand 38976 states and 161331 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:58,826 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-07-13 20:30:00,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:00,476 INFO L93 Difference]: Finished difference Result 88281 states and 358606 transitions. [2021-07-13 20:30:00,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:30:00,477 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:30:00,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:00,830 INFO L225 Difference]: With dead ends: 88281 [2021-07-13 20:30:00,830 INFO L226 Difference]: Without dead ends: 88226 [2021-07-13 20:30:00,830 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1658.0ms TimeCoverageRelationStatistics Valid=526, Invalid=3014, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:30:01,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88226 states. [2021-07-13 20:30:02,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88226 to 38600. [2021-07-13 20:30:02,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38600 states, 38599 states have (on average 4.1400554418508255) internal successors, (159802), 38599 states have internal predecessors, (159802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:02,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38600 states to 38600 states and 159802 transitions. [2021-07-13 20:30:02,517 INFO L78 Accepts]: Start accepts. Automaton has 38600 states and 159802 transitions. Word has length 39 [2021-07-13 20:30:02,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:02,517 INFO L482 AbstractCegarLoop]: Abstraction has 38600 states and 159802 transitions. [2021-07-13 20:30:02,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:02,518 INFO L276 IsEmpty]: Start isEmpty. Operand 38600 states and 159802 transitions. [2021-07-13 20:30:02,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:30:02,606 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:02,606 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:02,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:02,821 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:02,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:02,821 INFO L82 PathProgramCache]: Analyzing trace with hash 807300523, now seen corresponding path program 61 times [2021-07-13 20:30:02,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:02,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130925943] [2021-07-13 20:30:02,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:02,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:03,142 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:03,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:03,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130925943] [2021-07-13 20:30:03,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130925943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:03,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987394713] [2021-07-13 20:30:03,143 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 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 20:30:03,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:03,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:30:03,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:03,385 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:30:03,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-07-13 20:30:03,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:03,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:03,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:03,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-07-13 20:30:03,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:30:03,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:03,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:03,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:03,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:30:03,469 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:03,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987394713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:03,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:03,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:30:03,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178085994] [2021-07-13 20:30:03,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:30:03,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:03,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:30:03,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:30:03,470 INFO L87 Difference]: Start difference. First operand 38600 states and 159802 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:03,821 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-07-13 20:30:05,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:05,547 INFO L93 Difference]: Finished difference Result 71434 states and 291667 transitions. [2021-07-13 20:30:05,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:30:05,548 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:30:05,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:05,850 INFO L225 Difference]: With dead ends: 71434 [2021-07-13 20:30:05,850 INFO L226 Difference]: Without dead ends: 71186 [2021-07-13 20:30:05,850 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1257.3ms TimeCoverageRelationStatistics Valid=352, Invalid=1628, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:30:05,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71186 states. [2021-07-13 20:30:07,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71186 to 38786. [2021-07-13 20:30:07,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38786 states, 38785 states have (on average 4.138249323191956) internal successors, (160502), 38785 states have internal predecessors, (160502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:07,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38786 states to 38786 states and 160502 transitions. [2021-07-13 20:30:07,201 INFO L78 Accepts]: Start accepts. Automaton has 38786 states and 160502 transitions. Word has length 39 [2021-07-13 20:30:07,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:07,201 INFO L482 AbstractCegarLoop]: Abstraction has 38786 states and 160502 transitions. [2021-07-13 20:30:07,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:07,201 INFO L276 IsEmpty]: Start isEmpty. Operand 38786 states and 160502 transitions. [2021-07-13 20:30:07,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:30:07,291 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:07,291 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:07,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2021-07-13 20:30:07,492 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:07,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:07,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1900909765, now seen corresponding path program 62 times [2021-07-13 20:30:07,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:07,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836746070] [2021-07-13 20:30:07,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:07,833 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-07-13 20:30:08,025 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:08,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:08,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836746070] [2021-07-13 20:30:08,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836746070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:08,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265669565] [2021-07-13 20:30:08,025 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 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 20:30:08,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:30:08,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:08,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:30:08,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:08,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:30:08,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:08,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:08,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:08,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-13 20:30:08,321 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:30:08,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-13 20:30:08,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:08,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:08,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:08,324 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:30:08,370 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:08,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265669565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:08,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:08,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:30:08,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992143347] [2021-07-13 20:30:08,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:30:08,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:08,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:30:08,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:30:08,371 INFO L87 Difference]: Start difference. First operand 38786 states and 160502 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:10,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:10,514 INFO L93 Difference]: Finished difference Result 88085 states and 358572 transitions. [2021-07-13 20:30:10,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:30:10,515 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:30:10,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:10,866 INFO L225 Difference]: With dead ends: 88085 [2021-07-13 20:30:10,867 INFO L226 Difference]: Without dead ends: 87917 [2021-07-13 20:30:10,867 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1393.3ms TimeCoverageRelationStatistics Valid=415, Invalid=2035, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:30:10,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87917 states. [2021-07-13 20:30:12,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87917 to 38764. [2021-07-13 20:30:12,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38764 states, 38763 states have (on average 4.1404174083533265) internal successors, (160495), 38763 states have internal predecessors, (160495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:12,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38764 states to 38764 states and 160495 transitions. [2021-07-13 20:30:12,460 INFO L78 Accepts]: Start accepts. Automaton has 38764 states and 160495 transitions. Word has length 39 [2021-07-13 20:30:12,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:12,460 INFO L482 AbstractCegarLoop]: Abstraction has 38764 states and 160495 transitions. [2021-07-13 20:30:12,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:12,460 INFO L276 IsEmpty]: Start isEmpty. Operand 38764 states and 160495 transitions. [2021-07-13 20:30:12,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:30:12,552 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:12,552 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:12,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:12,753 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:12,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:12,753 INFO L82 PathProgramCache]: Analyzing trace with hash 374060779, now seen corresponding path program 63 times [2021-07-13 20:30:12,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:12,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574744159] [2021-07-13 20:30:12,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:12,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:13,372 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:13,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:13,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574744159] [2021-07-13 20:30:13,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574744159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:13,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137218198] [2021-07-13 20:30:13,373 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 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 20:30:13,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:30:13,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:13,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-13 20:30:13,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:13,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:13,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 55 [2021-07-13 20:30:13,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:13,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:13,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:30:13,827 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:146 [2021-07-13 20:30:14,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:14,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 57 [2021-07-13 20:30:14,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:14,082 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-07-13 20:30:14,082 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 39 treesize of output 47 [2021-07-13 20:30:14,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:14,110 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-07-13 20:30:14,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 47 [2021-07-13 20:30:14,111 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:14,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:14,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-07-13 20:30:14,123 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-13 20:30:14,134 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:30:14,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:30:14,135 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:14,148 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:30:14,148 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 52 treesize of output 1 [2021-07-13 20:30:14,148 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:14,172 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-07-13 20:30:14,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 56 [2021-07-13 20:30:14,174 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:14,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:14,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:14,184 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:30:14,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 30 [2021-07-13 20:30:14,185 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:14,213 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-07-13 20:30:14,213 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 39 treesize of output 53 [2021-07-13 20:30:14,228 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:14,240 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:30:14,241 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 39 treesize of output 1 [2021-07-13 20:30:14,241 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:14,252 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:30:14,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 1 [2021-07-13 20:30:14,253 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:14,262 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:30:14,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-07-13 20:30:14,263 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:14,560 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-07-13 20:30:14,560 INFO L628 ElimStorePlain]: treesize reduction 119, result has 71.3 percent of original size [2021-07-13 20:30:14,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 20:30:14,570 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 3 variables, input treesize:723, output treesize:201 [2021-07-13 20:30:14,721 INFO L446 ElimStorePlain]: Different costs {1=[q1, v_prenex_13, v_prenex_12, v_prenex_15], 3=[v_prenex_14]} [2021-07-13 20:30:14,733 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:14,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:30:14,735 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:30:14,908 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-07-13 20:30:14,908 INFO L628 ElimStorePlain]: treesize reduction 19, result has 93.0 percent of original size [2021-07-13 20:30:14,917 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:14,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:30:14,918 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:30:15,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:15,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:15,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-13 20:30:15,012 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:15,154 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-07-13 20:30:15,154 INFO L628 ElimStorePlain]: treesize reduction 48, result has 80.0 percent of original size [2021-07-13 20:30:15,163 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:15,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:30:15,164 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:30:15,284 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-07-13 20:30:15,284 INFO L628 ElimStorePlain]: treesize reduction 26, result has 86.4 percent of original size [2021-07-13 20:30:15,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:15,299 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:15,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 29 [2021-07-13 20:30:15,301 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-13 20:30:15,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:15,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-13 20:30:15,308 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:15,395 INFO L628 ElimStorePlain]: treesize reduction 34, result has 77.2 percent of original size [2021-07-13 20:30:15,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:30:15,399 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:272, output treesize:111 [2021-07-13 20:30:15,600 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:15,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137218198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:15,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:15,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-07-13 20:30:15,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503010352] [2021-07-13 20:30:15,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:30:15,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:15,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:30:15,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:30:15,602 INFO L87 Difference]: Start difference. First operand 38764 states and 160495 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:17,853 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 66 [2021-07-13 20:30:18,286 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-07-13 20:30:18,473 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2021-07-13 20:30:18,883 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 59 [2021-07-13 20:30:19,128 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2021-07-13 20:30:19,372 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 69 [2021-07-13 20:30:19,618 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 71 [2021-07-13 20:30:20,152 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 62 [2021-07-13 20:30:20,440 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-07-13 20:30:21,277 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2021-07-13 20:30:21,896 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-07-13 20:30:22,424 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2021-07-13 20:30:22,770 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 86 [2021-07-13 20:30:23,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:23,578 INFO L93 Difference]: Finished difference Result 74404 states and 301069 transitions. [2021-07-13 20:30:23,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-07-13 20:30:23,578 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:30:23,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:23,850 INFO L225 Difference]: With dead ends: 74404 [2021-07-13 20:30:23,850 INFO L226 Difference]: Without dead ends: 74256 [2021-07-13 20:30:23,851 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3203 ImplicationChecksByTransitivity, 6793.8ms TimeCoverageRelationStatistics Valid=1652, Invalid=8248, Unknown=0, NotChecked=0, Total=9900 [2021-07-13 20:30:23,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74256 states. [2021-07-13 20:30:24,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74256 to 38786. [2021-07-13 20:30:25,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38786 states, 38785 states have (on average 4.140234626788707) internal successors, (160579), 38785 states have internal predecessors, (160579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:25,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38786 states to 38786 states and 160579 transitions. [2021-07-13 20:30:25,161 INFO L78 Accepts]: Start accepts. Automaton has 38786 states and 160579 transitions. Word has length 39 [2021-07-13 20:30:25,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:25,161 INFO L482 AbstractCegarLoop]: Abstraction has 38786 states and 160579 transitions. [2021-07-13 20:30:25,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:25,161 INFO L276 IsEmpty]: Start isEmpty. Operand 38786 states and 160579 transitions. [2021-07-13 20:30:25,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:30:25,249 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:25,249 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:25,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:25,450 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:25,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:25,450 INFO L82 PathProgramCache]: Analyzing trace with hash -103766079, now seen corresponding path program 64 times [2021-07-13 20:30:25,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:25,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893647965] [2021-07-13 20:30:25,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:25,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:25,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:25,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893647965] [2021-07-13 20:30:25,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893647965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:25,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717432336] [2021-07-13 20:30:25,748 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 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 20:30:25,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:30:25,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:25,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:30:25,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:25,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:30:25,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:25,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:25,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:25,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-13 20:30:26,025 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:30:26,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-13 20:30:26,305 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-07-13 20:30:26,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:26,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:26,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:26,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:30:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:26,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717432336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:26,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:26,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:30:26,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569988327] [2021-07-13 20:30:26,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:30:26,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:26,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:30:26,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:30:26,367 INFO L87 Difference]: Start difference. First operand 38786 states and 160579 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:28,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:28,651 INFO L93 Difference]: Finished difference Result 87653 states and 356978 transitions. [2021-07-13 20:30:28,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:30:28,652 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:30:28,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:29,177 INFO L225 Difference]: With dead ends: 87653 [2021-07-13 20:30:29,177 INFO L226 Difference]: Without dead ends: 87571 [2021-07-13 20:30:29,177 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1223.7ms TimeCoverageRelationStatistics Valid=411, Invalid=2241, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:30:29,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87571 states. [2021-07-13 20:30:30,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87571 to 38508. [2021-07-13 20:30:30,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38508 states, 38507 states have (on average 4.141454800425897) internal successors, (159475), 38507 states have internal predecessors, (159475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:30,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38508 states to 38508 states and 159475 transitions. [2021-07-13 20:30:30,729 INFO L78 Accepts]: Start accepts. Automaton has 38508 states and 159475 transitions. Word has length 39 [2021-07-13 20:30:30,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:30,729 INFO L482 AbstractCegarLoop]: Abstraction has 38508 states and 159475 transitions. [2021-07-13 20:30:30,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:30,730 INFO L276 IsEmpty]: Start isEmpty. Operand 38508 states and 159475 transitions. [2021-07-13 20:30:30,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:30:30,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:30,810 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:31,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2021-07-13 20:30:31,010 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:31,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:31,011 INFO L82 PathProgramCache]: Analyzing trace with hash -335385293, now seen corresponding path program 65 times [2021-07-13 20:30:31,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:31,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174615341] [2021-07-13 20:30:31,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:31,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:31,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:31,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174615341] [2021-07-13 20:30:31,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174615341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:31,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405649230] [2021-07-13 20:30:31,260 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 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 20:30:31,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:30:31,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:31,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:30:31,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:31,648 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-07-13 20:30:31,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:31,791 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:31,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-07-13 20:30:31,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:31,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:31,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:30:31,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:58, output treesize:108 [2021-07-13 20:30:31,928 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:31,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2021-07-13 20:30:31,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:30:31,947 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:31,948 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 34 treesize of output 52 [2021-07-13 20:30:31,949 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:31,973 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-07-13 20:30:31,973 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 34 treesize of output 42 [2021-07-13 20:30:31,975 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:31,983 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:30:31,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2021-07-13 20:30:31,984 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:32,076 INFO L628 ElimStorePlain]: treesize reduction 3, result has 98.3 percent of original size [2021-07-13 20:30:32,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:30:32,087 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:173, output treesize:99 [2021-07-13 20:30:32,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:32,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:32,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:32,247 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:32,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2021-07-13 20:30:32,250 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:30:32,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:32,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:30:32,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:19 [2021-07-13 20:30:32,306 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:32,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405649230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:32,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:32,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:30:32,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331302958] [2021-07-13 20:30:32,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:30:32,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:32,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:30:32,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:30:32,307 INFO L87 Difference]: Start difference. First operand 38508 states and 159475 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:33,300 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 62 [2021-07-13 20:30:37,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:37,474 INFO L93 Difference]: Finished difference Result 76510 states and 312073 transitions. [2021-07-13 20:30:37,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-13 20:30:37,475 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:30:37,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:37,780 INFO L225 Difference]: With dead ends: 76510 [2021-07-13 20:30:37,780 INFO L226 Difference]: Without dead ends: 76400 [2021-07-13 20:30:37,781 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 3386.6ms TimeCoverageRelationStatistics Valid=947, Invalid=6363, Unknown=0, NotChecked=0, Total=7310 [2021-07-13 20:30:37,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76400 states. [2021-07-13 20:30:38,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76400 to 39033. [2021-07-13 20:30:39,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39033 states, 39032 states have (on average 4.140525722484115) internal successors, (161613), 39032 states have internal predecessors, (161613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:39,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39033 states to 39033 states and 161613 transitions. [2021-07-13 20:30:39,169 INFO L78 Accepts]: Start accepts. Automaton has 39033 states and 161613 transitions. Word has length 39 [2021-07-13 20:30:39,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:39,169 INFO L482 AbstractCegarLoop]: Abstraction has 39033 states and 161613 transitions. [2021-07-13 20:30:39,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:39,169 INFO L276 IsEmpty]: Start isEmpty. Operand 39033 states and 161613 transitions. [2021-07-13 20:30:39,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:30:39,510 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:39,511 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:39,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-07-13 20:30:39,740 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:39,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:39,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1178071479, now seen corresponding path program 66 times [2021-07-13 20:30:39,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:39,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305000510] [2021-07-13 20:30:39,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:39,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:40,018 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:40,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:40,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305000510] [2021-07-13 20:30:40,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305000510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:40,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001655919] [2021-07-13 20:30:40,019 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 20:30:40,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:30:40,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:40,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-13 20:30:40,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:40,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:30:40,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:40,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:40,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:40,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-13 20:30:40,280 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:30:40,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-07-13 20:30:40,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:40,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:40,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:40,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-07-13 20:30:40,333 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:40,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:30:40,335 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:30:40,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:40,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:30:40,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-13 20:30:40,391 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:40,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001655919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:40,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:40,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-07-13 20:30:40,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039525504] [2021-07-13 20:30:40,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:30:40,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:40,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:30:40,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:30:40,392 INFO L87 Difference]: Start difference. First operand 39033 states and 161613 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:44,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:44,021 INFO L93 Difference]: Finished difference Result 98553 states and 401234 transitions. [2021-07-13 20:30:44,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:30:44,021 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:30:44,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:44,474 INFO L225 Difference]: With dead ends: 98553 [2021-07-13 20:30:44,474 INFO L226 Difference]: Without dead ends: 98498 [2021-07-13 20:30:44,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 1790.6ms TimeCoverageRelationStatistics Valid=686, Invalid=3604, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:30:44,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98498 states. [2021-07-13 20:30:46,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98498 to 38951. [2021-07-13 20:30:46,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38951 states, 38950 states have (on average 4.142028241335045) internal successors, (161332), 38950 states have internal predecessors, (161332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:46,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38951 states to 38951 states and 161332 transitions. [2021-07-13 20:30:46,196 INFO L78 Accepts]: Start accepts. Automaton has 38951 states and 161332 transitions. Word has length 39 [2021-07-13 20:30:46,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:46,196 INFO L482 AbstractCegarLoop]: Abstraction has 38951 states and 161332 transitions. [2021-07-13 20:30:46,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:46,196 INFO L276 IsEmpty]: Start isEmpty. Operand 38951 states and 161332 transitions. [2021-07-13 20:30:46,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:30:46,280 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:46,281 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:46,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:46,481 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:46,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:46,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1021356079, now seen corresponding path program 67 times [2021-07-13 20:30:46,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:46,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339624647] [2021-07-13 20:30:46,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:46,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:47,032 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:47,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:47,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339624647] [2021-07-13 20:30:47,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339624647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:47,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530328079] [2021-07-13 20:30:47,032 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 20:30:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:47,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:30:47,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:47,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:30:47,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:47,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:47,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:47,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-13 20:30:47,332 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:30:47,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-13 20:30:47,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:47,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:47,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:47,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:30:47,381 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:47,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530328079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:47,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:47,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:30:47,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964414710] [2021-07-13 20:30:47,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:30:47,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:47,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:30:47,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:30:47,382 INFO L87 Difference]: Start difference. First operand 38951 states and 161332 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:49,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:49,454 INFO L93 Difference]: Finished difference Result 80550 states and 330912 transitions. [2021-07-13 20:30:49,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:30:49,469 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:30:49,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:49,797 INFO L225 Difference]: With dead ends: 80550 [2021-07-13 20:30:49,797 INFO L226 Difference]: Without dead ends: 80495 [2021-07-13 20:30:49,797 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1244.5ms TimeCoverageRelationStatistics Valid=337, Invalid=1469, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:30:49,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80495 states. [2021-07-13 20:30:51,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80495 to 39901. [2021-07-13 20:30:51,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39901 states, 39900 states have (on average 4.144611528822055) internal successors, (165370), 39900 states have internal predecessors, (165370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:51,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39901 states to 39901 states and 165370 transitions. [2021-07-13 20:30:51,223 INFO L78 Accepts]: Start accepts. Automaton has 39901 states and 165370 transitions. Word has length 39 [2021-07-13 20:30:51,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:51,223 INFO L482 AbstractCegarLoop]: Abstraction has 39901 states and 165370 transitions. [2021-07-13 20:30:51,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:51,223 INFO L276 IsEmpty]: Start isEmpty. Operand 39901 states and 165370 transitions. [2021-07-13 20:30:51,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:30:51,308 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:51,308 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:51,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:51,509 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:51,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:51,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1784259093, now seen corresponding path program 68 times [2021-07-13 20:30:51,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:51,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855996364] [2021-07-13 20:30:51,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:51,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:51,758 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:51,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:51,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855996364] [2021-07-13 20:30:51,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855996364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:51,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427794763] [2021-07-13 20:30:51,758 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 20:30:51,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:30:51,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:51,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:30:51,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:52,105 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-07-13 20:30:52,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:30:52,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:52,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:52,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:52,120 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-13 20:30:52,172 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:30:52,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-13 20:30:52,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:52,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:52,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:52,174 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:30:52,214 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:52,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427794763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:52,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:52,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:30:52,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908636414] [2021-07-13 20:30:52,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:30:52,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:52,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:30:52,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:30:52,215 INFO L87 Difference]: Start difference. First operand 39901 states and 165370 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:54,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:54,212 INFO L93 Difference]: Finished difference Result 77926 states and 319907 transitions. [2021-07-13 20:30:54,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:30:54,212 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:30:54,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:54,704 INFO L225 Difference]: With dead ends: 77926 [2021-07-13 20:30:54,704 INFO L226 Difference]: Without dead ends: 77871 [2021-07-13 20:30:54,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1011.9ms TimeCoverageRelationStatistics Valid=302, Invalid=1504, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:30:54,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77871 states. [2021-07-13 20:30:55,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77871 to 39485. [2021-07-13 20:30:55,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39485 states, 39484 states have (on average 4.144666193901327) internal successors, (163648), 39484 states have internal predecessors, (163648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:56,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39485 states to 39485 states and 163648 transitions. [2021-07-13 20:30:56,210 INFO L78 Accepts]: Start accepts. Automaton has 39485 states and 163648 transitions. Word has length 39 [2021-07-13 20:30:56,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:56,210 INFO L482 AbstractCegarLoop]: Abstraction has 39485 states and 163648 transitions. [2021-07-13 20:30:56,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:56,210 INFO L276 IsEmpty]: Start isEmpty. Operand 39485 states and 163648 transitions. [2021-07-13 20:30:56,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:30:56,295 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:56,295 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:56,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:56,511 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:56,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:56,511 INFO L82 PathProgramCache]: Analyzing trace with hash -829473297, now seen corresponding path program 69 times [2021-07-13 20:30:56,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:56,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761009195] [2021-07-13 20:30:56,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:56,841 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:56,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:56,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761009195] [2021-07-13 20:30:56,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761009195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:56,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238990820] [2021-07-13 20:30:56,841 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 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 20:30:56,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:30:56,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:56,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:30:56,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:57,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:57,150 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:57,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2021-07-13 20:30:57,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:57,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:57,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:57,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:106 [2021-07-13 20:30:57,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:57,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-07-13 20:30:57,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:57,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:57,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:57,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:40 [2021-07-13 20:30:57,563 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:57,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:30:57,565 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:30:57,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:57,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-13 20:30:57,570 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:57,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:57,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:57,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 9 [2021-07-13 20:30:57,574 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:57,618 INFO L628 ElimStorePlain]: treesize reduction 46, result has 50.0 percent of original size [2021-07-13 20:30:57,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:30:57,621 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:123, output treesize:47 [2021-07-13 20:30:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:57,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238990820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:57,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:57,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-07-13 20:30:57,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244883890] [2021-07-13 20:30:57,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:30:57,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:57,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:30:57,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:30:57,769 INFO L87 Difference]: Start difference. First operand 39485 states and 163648 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:03,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:03,155 INFO L93 Difference]: Finished difference Result 65504 states and 265768 transitions. [2021-07-13 20:31:03,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-07-13 20:31:03,155 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:31:03,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:03,416 INFO L225 Difference]: With dead ends: 65504 [2021-07-13 20:31:03,416 INFO L226 Difference]: Without dead ends: 65356 [2021-07-13 20:31:03,416 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2477 ImplicationChecksByTransitivity, 4271.2ms TimeCoverageRelationStatistics Valid=1000, Invalid=6832, Unknown=0, NotChecked=0, Total=7832 [2021-07-13 20:31:03,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65356 states. [2021-07-13 20:31:04,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65356 to 39869. [2021-07-13 20:31:04,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39869 states, 39868 states have (on average 4.140614026286746) internal successors, (165078), 39868 states have internal predecessors, (165078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:04,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39869 states to 39869 states and 165078 transitions. [2021-07-13 20:31:04,731 INFO L78 Accepts]: Start accepts. Automaton has 39869 states and 165078 transitions. Word has length 39 [2021-07-13 20:31:04,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:04,732 INFO L482 AbstractCegarLoop]: Abstraction has 39869 states and 165078 transitions. [2021-07-13 20:31:04,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:04,732 INFO L276 IsEmpty]: Start isEmpty. Operand 39869 states and 165078 transitions. [2021-07-13 20:31:04,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:31:04,820 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:04,820 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:05,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable352 [2021-07-13 20:31:05,021 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:05,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:05,021 INFO L82 PathProgramCache]: Analyzing trace with hash 920414259, now seen corresponding path program 70 times [2021-07-13 20:31:05,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:05,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656527829] [2021-07-13 20:31:05,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:05,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:05,365 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:05,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:05,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656527829] [2021-07-13 20:31:05,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656527829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:05,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711299254] [2021-07-13 20:31:05,366 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 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 20:31:05,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:31:05,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:05,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:31:05,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:05,829 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:31:05,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-07-13 20:31:05,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:05,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:05,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:05,836 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-07-13 20:31:05,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:31:05,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:05,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:05,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:05,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:31:05,910 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:05,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711299254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:05,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:05,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:31:05,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101881896] [2021-07-13 20:31:05,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:31:05,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:05,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:31:05,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:31:05,911 INFO L87 Difference]: Start difference. First operand 39869 states and 165078 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:08,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:08,725 INFO L93 Difference]: Finished difference Result 86144 states and 349998 transitions. [2021-07-13 20:31:08,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:31:08,725 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:31:08,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:09,091 INFO L225 Difference]: With dead ends: 86144 [2021-07-13 20:31:09,091 INFO L226 Difference]: Without dead ends: 85920 [2021-07-13 20:31:09,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 1652.2ms TimeCoverageRelationStatistics Valid=478, Invalid=2714, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:31:09,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85920 states. [2021-07-13 20:31:10,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85920 to 39648. [2021-07-13 20:31:10,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39648 states, 39647 states have (on average 4.144626327338765) internal successors, (164322), 39647 states have internal predecessors, (164322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:10,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39648 states to 39648 states and 164322 transitions. [2021-07-13 20:31:10,868 INFO L78 Accepts]: Start accepts. Automaton has 39648 states and 164322 transitions. Word has length 39 [2021-07-13 20:31:10,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:10,868 INFO L482 AbstractCegarLoop]: Abstraction has 39648 states and 164322 transitions. [2021-07-13 20:31:10,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:10,868 INFO L276 IsEmpty]: Start isEmpty. Operand 39648 states and 164322 transitions. [2021-07-13 20:31:10,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:31:10,969 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:10,969 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:11,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-07-13 20:31:11,169 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:11,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:11,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1466633787, now seen corresponding path program 71 times [2021-07-13 20:31:11,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:11,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732955675] [2021-07-13 20:31:11,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:11,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:11,478 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:11,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:11,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732955675] [2021-07-13 20:31:11,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732955675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:11,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399327515] [2021-07-13 20:31:11,478 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 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 20:31:11,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:31:11,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:11,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:31:11,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:11,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:31:11,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:11,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:11,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:31:11,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:57, output treesize:43 [2021-07-13 20:31:11,830 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:11,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 51 [2021-07-13 20:31:11,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:11,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:11,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:31:11,858 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:54, output treesize:28 [2021-07-13 20:31:11,930 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:11,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-07-13 20:31:11,932 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:31:11,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:11,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:31:11,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:13 [2021-07-13 20:31:12,144 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-07-13 20:31:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:12,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399327515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:12,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:12,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-13 20:31:12,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489178683] [2021-07-13 20:31:12,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:31:12,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:12,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:31:12,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:31:12,157 INFO L87 Difference]: Start difference. First operand 39648 states and 164322 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:17,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:17,900 INFO L93 Difference]: Finished difference Result 112657 states and 457618 transitions. [2021-07-13 20:31:17,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-07-13 20:31:17,900 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:31:17,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:18,654 INFO L225 Difference]: With dead ends: 112657 [2021-07-13 20:31:18,655 INFO L226 Difference]: Without dead ends: 112250 [2021-07-13 20:31:18,655 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2616 ImplicationChecksByTransitivity, 3254.4ms TimeCoverageRelationStatistics Valid=1144, Invalid=7228, Unknown=0, NotChecked=0, Total=8372 [2021-07-13 20:31:18,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112250 states. [2021-07-13 20:31:20,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112250 to 40068. [2021-07-13 20:31:20,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40068 states, 40067 states have (on average 4.142186837047944) internal successors, (165965), 40067 states have internal predecessors, (165965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:20,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40068 states to 40068 states and 165965 transitions. [2021-07-13 20:31:20,463 INFO L78 Accepts]: Start accepts. Automaton has 40068 states and 165965 transitions. Word has length 39 [2021-07-13 20:31:20,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:20,463 INFO L482 AbstractCegarLoop]: Abstraction has 40068 states and 165965 transitions. [2021-07-13 20:31:20,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:20,463 INFO L276 IsEmpty]: Start isEmpty. Operand 40068 states and 165965 transitions. [2021-07-13 20:31:20,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:31:20,559 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:20,559 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:20,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-07-13 20:31:20,760 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:20,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:20,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1262713041, now seen corresponding path program 72 times [2021-07-13 20:31:20,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:20,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054269098] [2021-07-13 20:31:20,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:21,296 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:21,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:21,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054269098] [2021-07-13 20:31:21,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054269098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:21,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510602819] [2021-07-13 20:31:21,297 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 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 20:31:21,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:31:21,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:21,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:31:21,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:21,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-07-13 20:31:21,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:21,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:21,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:21,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:39 [2021-07-13 20:31:21,573 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:31:21,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-13 20:31:21,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:21,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:21,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:21,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:11 [2021-07-13 20:31:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:21,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510602819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:21,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:21,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-07-13 20:31:21,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798885845] [2021-07-13 20:31:21,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:31:21,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:21,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:31:21,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:31:21,640 INFO L87 Difference]: Start difference. First operand 40068 states and 165965 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:23,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:23,421 INFO L93 Difference]: Finished difference Result 71486 states and 291440 transitions. [2021-07-13 20:31:23,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:31:23,422 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:31:23,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:23,871 INFO L225 Difference]: With dead ends: 71486 [2021-07-13 20:31:23,872 INFO L226 Difference]: Without dead ends: 71337 [2021-07-13 20:31:23,872 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1332.3ms TimeCoverageRelationStatistics Valid=375, Invalid=1787, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:31:23,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71337 states. [2021-07-13 20:31:24,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71337 to 40290. [2021-07-13 20:31:24,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40290 states, 40289 states have (on average 4.141949415473206) internal successors, (166875), 40289 states have internal predecessors, (166875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:25,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40290 states to 40290 states and 166875 transitions. [2021-07-13 20:31:25,340 INFO L78 Accepts]: Start accepts. Automaton has 40290 states and 166875 transitions. Word has length 39 [2021-07-13 20:31:25,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:25,341 INFO L482 AbstractCegarLoop]: Abstraction has 40290 states and 166875 transitions. [2021-07-13 20:31:25,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:25,341 INFO L276 IsEmpty]: Start isEmpty. Operand 40290 states and 166875 transitions. [2021-07-13 20:31:25,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:31:25,435 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:25,435 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:25,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable375,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:25,635 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:25,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:25,636 INFO L82 PathProgramCache]: Analyzing trace with hash -991443623, now seen corresponding path program 73 times [2021-07-13 20:31:25,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:25,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076038986] [2021-07-13 20:31:25,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:25,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:25,966 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:25,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:25,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076038986] [2021-07-13 20:31:25,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076038986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:25,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796670704] [2021-07-13 20:31:25,967 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:25,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:25,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:31:26,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:26,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:31:26,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:26,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:26,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:26,233 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-13 20:31:26,262 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:31:26,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-13 20:31:26,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:26,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:26,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:26,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:31:26,302 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:26,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796670704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:26,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:26,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-07-13 20:31:26,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226343724] [2021-07-13 20:31:26,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:31:26,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:26,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:31:26,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:31:26,303 INFO L87 Difference]: Start difference. First operand 40290 states and 166875 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:28,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:28,630 INFO L93 Difference]: Finished difference Result 74908 states and 306273 transitions. [2021-07-13 20:31:28,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:31:28,630 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:31:28,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:29,085 INFO L225 Difference]: With dead ends: 74908 [2021-07-13 20:31:29,085 INFO L226 Difference]: Without dead ends: 74834 [2021-07-13 20:31:29,085 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1137.4ms TimeCoverageRelationStatistics Valid=322, Invalid=1748, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:31:29,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74834 states. [2021-07-13 20:31:30,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74834 to 40210. [2021-07-13 20:31:30,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40210 states, 40209 states have (on average 4.1430774204780025) internal successors, (166589), 40209 states have internal predecessors, (166589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:30,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40210 states to 40210 states and 166589 transitions. [2021-07-13 20:31:30,581 INFO L78 Accepts]: Start accepts. Automaton has 40210 states and 166589 transitions. Word has length 39 [2021-07-13 20:31:30,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:30,581 INFO L482 AbstractCegarLoop]: Abstraction has 40210 states and 166589 transitions. [2021-07-13 20:31:30,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:30,581 INFO L276 IsEmpty]: Start isEmpty. Operand 40210 states and 166589 transitions. [2021-07-13 20:31:30,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:31:30,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:30,677 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:30,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-07-13 20:31:30,877 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:30,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:30,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1434492331, now seen corresponding path program 74 times [2021-07-13 20:31:30,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:30,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920910649] [2021-07-13 20:31:30,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:31,188 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:31,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:31,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920910649] [2021-07-13 20:31:31,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920910649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:31,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997715531] [2021-07-13 20:31:31,188 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 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 20:31:31,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:31:31,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:31,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:31:31,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:31,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:31:31,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:31,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:31,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:31,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-13 20:31:31,488 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:31:31,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-13 20:31:31,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:31,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:31,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:31,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:31:31,535 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:31,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997715531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:31,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:31,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:31:31,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287761608] [2021-07-13 20:31:31,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:31:31,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:31,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:31:31,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:31:31,536 INFO L87 Difference]: Start difference. First operand 40210 states and 166589 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:34,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:34,768 INFO L93 Difference]: Finished difference Result 104360 states and 423551 transitions. [2021-07-13 20:31:34,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:31:34,769 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:31:34,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:35,573 INFO L225 Difference]: With dead ends: 104360 [2021-07-13 20:31:35,573 INFO L226 Difference]: Without dead ends: 104240 [2021-07-13 20:31:35,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 1787.0ms TimeCoverageRelationStatistics Valid=586, Invalid=3074, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:31:35,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104240 states. [2021-07-13 20:31:37,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104240 to 39614. [2021-07-13 20:31:37,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39614 states, 39613 states have (on average 4.146971953651579) internal successors, (164274), 39613 states have internal predecessors, (164274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:37,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39614 states to 39614 states and 164274 transitions. [2021-07-13 20:31:37,342 INFO L78 Accepts]: Start accepts. Automaton has 39614 states and 164274 transitions. Word has length 39 [2021-07-13 20:31:37,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:37,342 INFO L482 AbstractCegarLoop]: Abstraction has 39614 states and 164274 transitions. [2021-07-13 20:31:37,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:37,343 INFO L276 IsEmpty]: Start isEmpty. Operand 39614 states and 164274 transitions. [2021-07-13 20:31:37,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:31:37,682 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:37,682 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:37,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-07-13 20:31:37,897 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:37,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:37,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1895467137, now seen corresponding path program 75 times [2021-07-13 20:31:37,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:37,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419408329] [2021-07-13 20:31:37,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:38,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:38,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419408329] [2021-07-13 20:31:38,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419408329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:38,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806122441] [2021-07-13 20:31:38,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:31:38,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:31:38,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:38,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:31:38,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:38,502 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:38,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-07-13 20:31:38,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:38,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:38,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:31:38,522 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:61 [2021-07-13 20:31:38,794 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_20, v_prenex_18], 3=[q1]} [2021-07-13 20:31:38,805 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:38,805 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 26 treesize of output 26 [2021-07-13 20:31:38,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:31:38,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:38,868 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:38,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-07-13 20:31:38,869 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-13 20:31:38,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:38,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:38,930 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:38,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 45 [2021-07-13 20:31:38,931 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:38,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:38,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 3 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-07-13 20:31:38,996 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 7 variables, input treesize:168, output treesize:166 [2021-07-13 20:31:39,350 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:39,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:31:39,351 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:31:39,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:39,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:31:39,369 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:45 [2021-07-13 20:31:39,472 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:39,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806122441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:39,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:39,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-07-13 20:31:39,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247711198] [2021-07-13 20:31:39,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:31:39,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:39,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:31:39,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=947, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:31:39,473 INFO L87 Difference]: Start difference. First operand 39614 states and 164274 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:41,526 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 68 [2021-07-13 20:31:42,603 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2021-07-13 20:31:44,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:44,954 INFO L93 Difference]: Finished difference Result 80724 states and 325313 transitions. [2021-07-13 20:31:44,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-13 20:31:44,954 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:31:44,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:45,450 INFO L225 Difference]: With dead ends: 80724 [2021-07-13 20:31:45,451 INFO L226 Difference]: Without dead ends: 80450 [2021-07-13 20:31:45,451 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2507 ImplicationChecksByTransitivity, 4612.6ms TimeCoverageRelationStatistics Valid=1241, Invalid=6769, Unknown=0, NotChecked=0, Total=8010 [2021-07-13 20:31:45,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80450 states. [2021-07-13 20:31:46,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80450 to 39763. [2021-07-13 20:31:46,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39763 states, 39762 states have (on average 4.144761329912982) internal successors, (164804), 39762 states have internal predecessors, (164804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:47,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39763 states to 39763 states and 164804 transitions. [2021-07-13 20:31:47,027 INFO L78 Accepts]: Start accepts. Automaton has 39763 states and 164804 transitions. Word has length 39 [2021-07-13 20:31:47,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:47,027 INFO L482 AbstractCegarLoop]: Abstraction has 39763 states and 164804 transitions. [2021-07-13 20:31:47,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:47,027 INFO L276 IsEmpty]: Start isEmpty. Operand 39763 states and 164804 transitions. [2021-07-13 20:31:47,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:31:47,121 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:47,121 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:47,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-07-13 20:31:47,321 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:47,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:47,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1621561025, now seen corresponding path program 76 times [2021-07-13 20:31:47,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:47,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766708563] [2021-07-13 20:31:47,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:47,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:47,610 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:47,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:47,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766708563] [2021-07-13 20:31:47,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766708563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:47,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75248373] [2021-07-13 20:31:47,611 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 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 20:31:47,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:31:47,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:47,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:31:47,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:48,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:31:48,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:48,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:48,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:48,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-13 20:31:48,089 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:31:48,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-13 20:31:48,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:48,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:48,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:48,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:31:48,133 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:48,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75248373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:48,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:48,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:31:48,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823672023] [2021-07-13 20:31:48,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:31:48,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:48,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:31:48,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:31:48,134 INFO L87 Difference]: Start difference. First operand 39763 states and 164804 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:50,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:50,284 INFO L93 Difference]: Finished difference Result 94767 states and 386325 transitions. [2021-07-13 20:31:50,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:31:50,285 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:31:50,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:50,697 INFO L225 Difference]: With dead ends: 94767 [2021-07-13 20:31:50,697 INFO L226 Difference]: Without dead ends: 94685 [2021-07-13 20:31:50,697 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1318.9ms TimeCoverageRelationStatistics Valid=409, Invalid=2041, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:31:50,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94685 states. [2021-07-13 20:31:52,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94685 to 39969. [2021-07-13 20:31:52,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39969 states, 39968 states have (on average 4.144115292233787) internal successors, (165632), 39968 states have internal predecessors, (165632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:52,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39969 states to 39969 states and 165632 transitions. [2021-07-13 20:31:52,394 INFO L78 Accepts]: Start accepts. Automaton has 39969 states and 165632 transitions. Word has length 39 [2021-07-13 20:31:52,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:52,394 INFO L482 AbstractCegarLoop]: Abstraction has 39969 states and 165632 transitions. [2021-07-13 20:31:52,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:52,394 INFO L276 IsEmpty]: Start isEmpty. Operand 39969 states and 165632 transitions. [2021-07-13 20:31:52,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:31:52,498 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:52,499 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:52,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:52,699 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:52,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:52,699 INFO L82 PathProgramCache]: Analyzing trace with hash -32263573, now seen corresponding path program 77 times [2021-07-13 20:31:52,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:52,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591572208] [2021-07-13 20:31:52,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:52,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:52,998 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-07-13 20:31:53,223 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:53,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:53,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591572208] [2021-07-13 20:31:53,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591572208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:53,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519889819] [2021-07-13 20:31:53,224 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 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 20:31:53,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:31:53,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:53,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 20:31:53,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:53,567 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:53,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-07-13 20:31:53,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:53,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:53,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:31:53,614 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:68 [2021-07-13 20:31:53,970 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_28], 6=[q1, v_prenex_26]} [2021-07-13 20:31:53,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:53,988 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:53,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 42 [2021-07-13 20:31:53,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:54,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:54,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:54,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:54,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:54,053 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:54,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2021-07-13 20:31:54,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-13 20:31:54,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:54,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:54,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:54,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:54,114 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:54,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 59 [2021-07-13 20:31:54,118 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-13 20:31:54,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:54,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-13 20:31:54,163 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 7 variables, input treesize:181, output treesize:84 [2021-07-13 20:31:54,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:54,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-07-13 20:31:54,280 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:31:54,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:54,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:31:54,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:11 [2021-07-13 20:31:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:54,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519889819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:54,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:54,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:31:54,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785731433] [2021-07-13 20:31:54,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:31:54,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:54,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:31:54,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:31:54,484 INFO L87 Difference]: Start difference. First operand 39969 states and 165632 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:01,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:01,288 INFO L93 Difference]: Finished difference Result 111989 states and 453363 transitions. [2021-07-13 20:32:01,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-07-13 20:32:01,288 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:32:01,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:01,812 INFO L225 Difference]: With dead ends: 111989 [2021-07-13 20:32:01,812 INFO L226 Difference]: Without dead ends: 111570 [2021-07-13 20:32:01,813 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 5000.0ms TimeCoverageRelationStatistics Valid=1232, Invalid=8080, Unknown=0, NotChecked=0, Total=9312 [2021-07-13 20:32:02,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111570 states. [2021-07-13 20:32:03,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111570 to 40153. [2021-07-13 20:32:03,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40153 states, 40152 states have (on average 4.142757521418609) internal successors, (166340), 40152 states have internal predecessors, (166340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:03,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40153 states to 40153 states and 166340 transitions. [2021-07-13 20:32:03,965 INFO L78 Accepts]: Start accepts. Automaton has 40153 states and 166340 transitions. Word has length 39 [2021-07-13 20:32:03,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:03,965 INFO L482 AbstractCegarLoop]: Abstraction has 40153 states and 166340 transitions. [2021-07-13 20:32:03,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:03,965 INFO L276 IsEmpty]: Start isEmpty. Operand 40153 states and 166340 transitions. [2021-07-13 20:32:04,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:32:04,060 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:04,060 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:04,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-07-13 20:32:04,261 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:04,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:04,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1810739247, now seen corresponding path program 78 times [2021-07-13 20:32:04,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:04,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168872491] [2021-07-13 20:32:04,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:04,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:04,578 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:04,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:04,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168872491] [2021-07-13 20:32:04,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168872491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:04,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279332766] [2021-07-13 20:32:04,579 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 20:32:04,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:32:04,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:04,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:32:04,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:05,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:32:05,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:05,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:05,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:32:05,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:44 [2021-07-13 20:32:05,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:05,093 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:05,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 38 [2021-07-13 20:32:05,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:05,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:05,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:05,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:53, output treesize:28 [2021-07-13 20:32:05,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:05,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:32:05,188 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:32:05,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:05,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:32:05,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:33 [2021-07-13 20:32:05,281 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:05,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279332766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:05,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:05,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-13 20:32:05,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501021251] [2021-07-13 20:32:05,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:32:05,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:05,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:32:05,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:32:05,282 INFO L87 Difference]: Start difference. First operand 40153 states and 166340 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:11,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:11,808 INFO L93 Difference]: Finished difference Result 120932 states and 494689 transitions. [2021-07-13 20:32:11,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-07-13 20:32:11,808 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:32:11,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:12,386 INFO L225 Difference]: With dead ends: 120932 [2021-07-13 20:32:12,386 INFO L226 Difference]: Without dead ends: 120663 [2021-07-13 20:32:12,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4086 ImplicationChecksByTransitivity, 4606.2ms TimeCoverageRelationStatistics Valid=1668, Invalid=9888, Unknown=0, NotChecked=0, Total=11556 [2021-07-13 20:32:12,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120663 states. [2021-07-13 20:32:14,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120663 to 40812. [2021-07-13 20:32:14,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40812 states, 40811 states have (on average 4.141922520888976) internal successors, (169036), 40811 states have internal predecessors, (169036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:14,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40812 states to 40812 states and 169036 transitions. [2021-07-13 20:32:14,530 INFO L78 Accepts]: Start accepts. Automaton has 40812 states and 169036 transitions. Word has length 39 [2021-07-13 20:32:14,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:14,530 INFO L482 AbstractCegarLoop]: Abstraction has 40812 states and 169036 transitions. [2021-07-13 20:32:14,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:14,530 INFO L276 IsEmpty]: Start isEmpty. Operand 40812 states and 169036 transitions. [2021-07-13 20:32:14,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:32:14,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:14,626 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:14,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable421,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:14,829 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:14,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:14,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1846957111, now seen corresponding path program 79 times [2021-07-13 20:32:14,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:14,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329458321] [2021-07-13 20:32:14,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:14,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:15,119 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:15,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:15,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329458321] [2021-07-13 20:32:15,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329458321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:15,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505282482] [2021-07-13 20:32:15,120 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 20:32:15,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:15,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:32:15,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:15,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:32:15,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:15,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:15,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:15,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-13 20:32:15,572 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:32:15,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-07-13 20:32:15,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:15,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:15,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:15,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-07-13 20:32:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:15,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505282482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:15,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:15,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:32:15,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131403627] [2021-07-13 20:32:15,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:32:15,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:15,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:32:15,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:32:15,637 INFO L87 Difference]: Start difference. First operand 40812 states and 169036 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:17,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:17,982 INFO L93 Difference]: Finished difference Result 93840 states and 382143 transitions. [2021-07-13 20:32:17,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:32:17,983 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:32:17,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:18,405 INFO L225 Difference]: With dead ends: 93840 [2021-07-13 20:32:18,405 INFO L226 Difference]: Without dead ends: 93766 [2021-07-13 20:32:18,405 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1326.4ms TimeCoverageRelationStatistics Valid=379, Invalid=1973, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:32:18,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93766 states. [2021-07-13 20:32:19,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93766 to 40153. [2021-07-13 20:32:19,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40153 states, 40152 states have (on average 4.142757521418609) internal successors, (166340), 40152 states have internal predecessors, (166340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:20,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40153 states to 40153 states and 166340 transitions. [2021-07-13 20:32:20,112 INFO L78 Accepts]: Start accepts. Automaton has 40153 states and 166340 transitions. Word has length 39 [2021-07-13 20:32:20,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:20,112 INFO L482 AbstractCegarLoop]: Abstraction has 40153 states and 166340 transitions. [2021-07-13 20:32:20,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:20,112 INFO L276 IsEmpty]: Start isEmpty. Operand 40153 states and 166340 transitions. [2021-07-13 20:32:20,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:32:20,206 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:20,206 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:20,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:20,406 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:20,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:20,406 INFO L82 PathProgramCache]: Analyzing trace with hash 247806187, now seen corresponding path program 80 times [2021-07-13 20:32:20,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:20,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089983938] [2021-07-13 20:32:20,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:20,959 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:20,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:20,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089983938] [2021-07-13 20:32:20,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089983938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:20,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029657396] [2021-07-13 20:32:20,959 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 20:32:20,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:32:20,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:20,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:32:20,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:21,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:32:21,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:21,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:21,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:21,177 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-13 20:32:21,232 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:32:21,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-13 20:32:21,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:21,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:21,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:21,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:32:21,277 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:21,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029657396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:21,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:21,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:32:21,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505114431] [2021-07-13 20:32:21,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:32:21,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:21,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:32:21,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:32:21,278 INFO L87 Difference]: Start difference. First operand 40153 states and 166340 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:24,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:24,372 INFO L93 Difference]: Finished difference Result 116370 states and 472671 transitions. [2021-07-13 20:32:24,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:32:24,372 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:32:24,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:24,923 INFO L225 Difference]: With dead ends: 116370 [2021-07-13 20:32:24,923 INFO L226 Difference]: Without dead ends: 116234 [2021-07-13 20:32:24,924 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1539.6ms TimeCoverageRelationStatistics Valid=533, Invalid=2889, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:32:25,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116234 states. [2021-07-13 20:32:26,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116234 to 39521. [2021-07-13 20:32:26,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39521 states, 39520 states have (on average 4.145141700404858) internal successors, (163816), 39520 states have internal predecessors, (163816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:27,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39521 states to 39521 states and 163816 transitions. [2021-07-13 20:32:27,098 INFO L78 Accepts]: Start accepts. Automaton has 39521 states and 163816 transitions. Word has length 39 [2021-07-13 20:32:27,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:27,098 INFO L482 AbstractCegarLoop]: Abstraction has 39521 states and 163816 transitions. [2021-07-13 20:32:27,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:27,098 INFO L276 IsEmpty]: Start isEmpty. Operand 39521 states and 163816 transitions. [2021-07-13 20:32:27,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:32:27,206 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:27,206 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:27,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable430,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:27,407 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:27,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:27,407 INFO L82 PathProgramCache]: Analyzing trace with hash 2140222515, now seen corresponding path program 81 times [2021-07-13 20:32:27,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:27,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606416662] [2021-07-13 20:32:27,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:27,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:27,670 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:27,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:27,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606416662] [2021-07-13 20:32:27,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606416662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:27,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292886720] [2021-07-13 20:32:27,670 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 20:32:27,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:32:27,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:27,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:32:27,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:27,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:27,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:27,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-07-13 20:32:27,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:27,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:27,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:27,957 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:61, output treesize:78 [2021-07-13 20:32:28,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:28,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:28,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 44 [2021-07-13 20:32:28,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:28,077 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:28,077 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 25 treesize of output 25 [2021-07-13 20:32:28,078 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-13 20:32:28,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:28,094 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:28,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 44 [2021-07-13 20:32:28,095 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:28,103 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:32:28,103 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 25 treesize of output 21 [2021-07-13 20:32:28,104 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:28,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:28,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:32:28,168 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:243, output treesize:308 [2021-07-13 20:32:28,422 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-07-13 20:32:28,539 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:28,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:32:28,540 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:32:28,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:28,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:28,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-13 20:32:28,568 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:28,602 INFO L628 ElimStorePlain]: treesize reduction 23, result has 64.1 percent of original size [2021-07-13 20:32:28,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:32:28,603 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:76, output treesize:42 [2021-07-13 20:32:28,734 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:28,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292886720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:28,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:28,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-13 20:32:28,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677500028] [2021-07-13 20:32:28,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:32:28,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:28,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:32:28,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:32:28,735 INFO L87 Difference]: Start difference. First operand 39521 states and 163816 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:31,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:31,638 INFO L93 Difference]: Finished difference Result 77354 states and 314932 transitions. [2021-07-13 20:32:31,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:32:31,638 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:32:31,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:31,945 INFO L225 Difference]: With dead ends: 77354 [2021-07-13 20:32:31,945 INFO L226 Difference]: Without dead ends: 77244 [2021-07-13 20:32:31,945 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 2373.5ms TimeCoverageRelationStatistics Valid=693, Invalid=2847, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:32:32,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77244 states. [2021-07-13 20:32:33,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77244 to 39808. [2021-07-13 20:32:33,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39808 states, 39807 states have (on average 4.143693320270304) internal successors, (164948), 39807 states have internal predecessors, (164948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:33,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39808 states to 39808 states and 164948 transitions. [2021-07-13 20:32:33,431 INFO L78 Accepts]: Start accepts. Automaton has 39808 states and 164948 transitions. Word has length 39 [2021-07-13 20:32:33,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:33,431 INFO L482 AbstractCegarLoop]: Abstraction has 39808 states and 164948 transitions. [2021-07-13 20:32:33,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:33,432 INFO L276 IsEmpty]: Start isEmpty. Operand 39808 states and 164948 transitions. [2021-07-13 20:32:33,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:32:33,522 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:33,522 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:33,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-07-13 20:32:33,723 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:33,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:33,723 INFO L82 PathProgramCache]: Analyzing trace with hash 458385605, now seen corresponding path program 82 times [2021-07-13 20:32:33,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:33,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598053829] [2021-07-13 20:32:33,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:34,241 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:34,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:34,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598053829] [2021-07-13 20:32:34,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598053829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:34,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171646496] [2021-07-13 20:32:34,241 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 20:32:34,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:32:34,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:34,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:32:34,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:34,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:32:34,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:34,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:34,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:34,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-07-13 20:32:34,474 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:32:34,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-07-13 20:32:34,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:34,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:34,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:34,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-07-13 20:32:34,535 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:34,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171646496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:34,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:34,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:32:34,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275979898] [2021-07-13 20:32:34,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:32:34,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:34,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:32:34,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:32:34,536 INFO L87 Difference]: Start difference. First operand 39808 states and 164948 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:35,487 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-07-13 20:32:36,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:36,741 INFO L93 Difference]: Finished difference Result 98952 states and 404548 transitions. [2021-07-13 20:32:36,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:32:36,742 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:32:36,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:37,184 INFO L225 Difference]: With dead ends: 98952 [2021-07-13 20:32:37,184 INFO L226 Difference]: Without dead ends: 98897 [2021-07-13 20:32:37,185 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1156.9ms TimeCoverageRelationStatistics Valid=400, Invalid=1952, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:32:37,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98897 states. [2021-07-13 20:32:38,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98897 to 41626. [2021-07-13 20:32:38,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41626 states, 41625 states have (on average 4.144912912912913) internal successors, (172532), 41625 states have internal predecessors, (172532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:39,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41626 states to 41626 states and 172532 transitions. [2021-07-13 20:32:39,396 INFO L78 Accepts]: Start accepts. Automaton has 41626 states and 172532 transitions. Word has length 39 [2021-07-13 20:32:39,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:39,396 INFO L482 AbstractCegarLoop]: Abstraction has 41626 states and 172532 transitions. [2021-07-13 20:32:39,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:39,396 INFO L276 IsEmpty]: Start isEmpty. Operand 41626 states and 172532 transitions. [2021-07-13 20:32:39,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:32:39,498 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:39,498 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:39,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-07-13 20:32:39,699 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:39,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:39,700 INFO L82 PathProgramCache]: Analyzing trace with hash -798003409, now seen corresponding path program 83 times [2021-07-13 20:32:39,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:39,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4994527] [2021-07-13 20:32:39,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:39,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:39,940 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:39,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:39,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4994527] [2021-07-13 20:32:39,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4994527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:39,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396153731] [2021-07-13 20:32:39,941 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 20:32:39,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:32:39,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:39,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:32:39,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:40,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:32:40,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:40,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:40,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:40,119 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-07-13 20:32:40,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:40,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 53 [2021-07-13 20:32:40,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:40,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:40,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:32:40,252 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:25 [2021-07-13 20:32:40,299 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:40,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:32:40,301 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:32:40,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:40,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:32:40,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-13 20:32:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:40,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396153731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:40,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:40,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-13 20:32:40,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321321678] [2021-07-13 20:32:40,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:32:40,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:40,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:32:40,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:32:40,354 INFO L87 Difference]: Start difference. First operand 41626 states and 172532 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:44,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:44,282 INFO L93 Difference]: Finished difference Result 86010 states and 349681 transitions. [2021-07-13 20:32:44,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-13 20:32:44,282 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:32:44,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:44,796 INFO L225 Difference]: With dead ends: 86010 [2021-07-13 20:32:44,796 INFO L226 Difference]: Without dead ends: 85900 [2021-07-13 20:32:44,797 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2153 ImplicationChecksByTransitivity, 2569.2ms TimeCoverageRelationStatistics Valid=1085, Invalid=5557, Unknown=0, NotChecked=0, Total=6642 [2021-07-13 20:32:44,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85900 states. [2021-07-13 20:32:45,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85900 to 42486. [2021-07-13 20:32:46,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42486 states, 42485 states have (on average 4.143580087089561) internal successors, (176040), 42485 states have internal predecessors, (176040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:46,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42486 states to 42486 states and 176040 transitions. [2021-07-13 20:32:46,401 INFO L78 Accepts]: Start accepts. Automaton has 42486 states and 176040 transitions. Word has length 39 [2021-07-13 20:32:46,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:46,401 INFO L482 AbstractCegarLoop]: Abstraction has 42486 states and 176040 transitions. [2021-07-13 20:32:46,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:46,401 INFO L276 IsEmpty]: Start isEmpty. Operand 42486 states and 176040 transitions. [2021-07-13 20:32:46,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:32:46,497 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:46,497 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:46,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-07-13 20:32:46,697 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:46,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:46,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1274133635, now seen corresponding path program 84 times [2021-07-13 20:32:46,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:46,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909316675] [2021-07-13 20:32:46,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:46,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:46,971 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:46,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:46,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909316675] [2021-07-13 20:32:46,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909316675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:46,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066745207] [2021-07-13 20:32:46,971 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 20:32:47,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:32:47,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:47,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 20:32:47,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:47,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:32:47,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:47,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:47,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:47,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-07-13 20:32:47,258 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:32:47,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-13 20:32:47,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:47,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:47,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:47,261 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:32:47,307 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:47,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066745207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:47,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:47,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:32:47,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126736406] [2021-07-13 20:32:47,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:32:47,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:47,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:32:47,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:32:47,308 INFO L87 Difference]: Start difference. First operand 42486 states and 176040 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:50,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:50,085 INFO L93 Difference]: Finished difference Result 100201 states and 409486 transitions. [2021-07-13 20:32:50,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:32:50,086 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:32:50,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:50,554 INFO L225 Difference]: With dead ends: 100201 [2021-07-13 20:32:50,554 INFO L226 Difference]: Without dead ends: 100146 [2021-07-13 20:32:50,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1127.2ms TimeCoverageRelationStatistics Valid=433, Invalid=2017, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:32:50,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100146 states. [2021-07-13 20:32:52,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100146 to 41898. [2021-07-13 20:32:52,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41898 states, 41897 states have (on average 4.146358927846863) internal successors, (173720), 41897 states have internal predecessors, (173720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:52,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41898 states to 41898 states and 173720 transitions. [2021-07-13 20:32:52,333 INFO L78 Accepts]: Start accepts. Automaton has 41898 states and 173720 transitions. Word has length 39 [2021-07-13 20:32:52,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:52,333 INFO L482 AbstractCegarLoop]: Abstraction has 41898 states and 173720 transitions. [2021-07-13 20:32:52,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:52,333 INFO L276 IsEmpty]: Start isEmpty. Operand 41898 states and 173720 transitions. [2021-07-13 20:32:52,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:32:52,425 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:52,425 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forcibly destroying the process [2021-07-13 20:32:52,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:52,808 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:52,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:52,809 INFO L82 PathProgramCache]: Analyzing trace with hash 691348715, now seen corresponding path program 85 times [2021-07-13 20:32:52,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:52,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877779594] [2021-07-13 20:32:52,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:52,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:53,169 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:53,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:53,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877779594] [2021-07-13 20:32:53,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877779594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:53,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832779342] [2021-07-13 20:32:53,169 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 20:32:53,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:53,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:32:53,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:53,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:32:53,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:53,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:53,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:53,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-07-13 20:32:53,457 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:32:53,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-13 20:32:53,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:53,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:53,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:53,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:32:53,505 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:53,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832779342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:53,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:53,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:32:53,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074641385] [2021-07-13 20:32:53,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:32:53,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:53,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:32:53,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:32:53,506 INFO L87 Difference]: Start difference. First operand 41898 states and 173720 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:55,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:55,559 INFO L93 Difference]: Finished difference Result 82479 states and 338687 transitions. [2021-07-13 20:32:55,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:32:55,559 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:32:55,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:55,897 INFO L225 Difference]: With dead ends: 82479 [2021-07-13 20:32:55,897 INFO L226 Difference]: Without dead ends: 82424 [2021-07-13 20:32:55,897 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 966.5ms TimeCoverageRelationStatistics Valid=337, Invalid=1385, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:32:55,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82424 states. [2021-07-13 20:32:57,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82424 to 41202. [2021-07-13 20:32:57,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41202 states, 41201 states have (on average 4.142520812601636) internal successors, (170676), 41201 states have internal predecessors, (170676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:57,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41202 states to 41202 states and 170676 transitions. [2021-07-13 20:32:57,425 INFO L78 Accepts]: Start accepts. Automaton has 41202 states and 170676 transitions. Word has length 39 [2021-07-13 20:32:57,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:57,425 INFO L482 AbstractCegarLoop]: Abstraction has 41202 states and 170676 transitions. [2021-07-13 20:32:57,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:57,425 INFO L276 IsEmpty]: Start isEmpty. Operand 41202 states and 170676 transitions. [2021-07-13 20:32:57,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:32:57,523 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:57,523 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:57,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable451 [2021-07-13 20:32:57,724 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:57,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:57,724 INFO L82 PathProgramCache]: Analyzing trace with hash 983531635, now seen corresponding path program 86 times [2021-07-13 20:32:57,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:57,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202155608] [2021-07-13 20:32:57,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:57,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:58,102 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-07-13 20:32:58,148 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:58,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:58,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202155608] [2021-07-13 20:32:58,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202155608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:58,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287077475] [2021-07-13 20:32:58,149 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 20:32:58,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:32:58,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:58,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:32:58,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:58,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:32:58,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:58,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:58,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:58,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-07-13 20:32:58,404 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:32:58,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-13 20:32:58,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:58,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:58,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:58,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:32:58,446 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:58,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287077475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:58,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:58,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:32:58,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045798391] [2021-07-13 20:32:58,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:32:58,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:58,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:32:58,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:32:58,447 INFO L87 Difference]: Start difference. First operand 41202 states and 170676 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:00,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:00,181 INFO L93 Difference]: Finished difference Result 85275 states and 350117 transitions. [2021-07-13 20:33:00,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:33:00,181 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:33:00,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:00,715 INFO L225 Difference]: With dead ends: 85275 [2021-07-13 20:33:00,716 INFO L226 Difference]: Without dead ends: 85220 [2021-07-13 20:33:00,716 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1011.7ms TimeCoverageRelationStatistics Valid=358, Invalid=1448, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:33:00,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85220 states. [2021-07-13 20:33:02,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85220 to 41643. [2021-07-13 20:33:02,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41643 states, 41642 states have (on average 4.147975601556121) internal successors, (172730), 41642 states have internal predecessors, (172730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:02,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41643 states to 41643 states and 172730 transitions. [2021-07-13 20:33:02,295 INFO L78 Accepts]: Start accepts. Automaton has 41643 states and 172730 transitions. Word has length 39 [2021-07-13 20:33:02,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:02,295 INFO L482 AbstractCegarLoop]: Abstraction has 41643 states and 172730 transitions. [2021-07-13 20:33:02,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:02,296 INFO L276 IsEmpty]: Start isEmpty. Operand 41643 states and 172730 transitions. [2021-07-13 20:33:02,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:33:02,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:02,390 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:02,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-07-13 20:33:02,591 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:02,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:02,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1822083537, now seen corresponding path program 87 times [2021-07-13 20:33:02,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:02,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366784521] [2021-07-13 20:33:02,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:02,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:02,834 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:02,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:02,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366784521] [2021-07-13 20:33:02,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366784521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:02,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177428191] [2021-07-13 20:33:02,834 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 20:33:02,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:33:02,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:02,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-13 20:33:02,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:03,141 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-07-13 20:33:03,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2021-07-13 20:33:03,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:03,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:03,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:03,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:40 [2021-07-13 20:33:03,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:03,368 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:03,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-07-13 20:33:03,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:03,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:03,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:33:03,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:75 [2021-07-13 20:33:03,434 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:03,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:33:03,436 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:33:03,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:03,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:03,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2021-07-13 20:33:03,458 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:03,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:03,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:33:03,478 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:44 [2021-07-13 20:33:03,567 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:03,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177428191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:03,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:03,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-13 20:33:03,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274743816] [2021-07-13 20:33:03,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:33:03,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:03,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:33:03,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:33:03,569 INFO L87 Difference]: Start difference. First operand 41643 states and 172730 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:04,729 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-07-13 20:33:08,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:08,162 INFO L93 Difference]: Finished difference Result 98168 states and 401438 transitions. [2021-07-13 20:33:08,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-13 20:33:08,163 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:33:08,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:08,542 INFO L225 Difference]: With dead ends: 98168 [2021-07-13 20:33:08,542 INFO L226 Difference]: Without dead ends: 98026 [2021-07-13 20:33:08,542 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2668 ImplicationChecksByTransitivity, 3270.7ms TimeCoverageRelationStatistics Valid=1322, Invalid=6160, Unknown=0, NotChecked=0, Total=7482 [2021-07-13 20:33:08,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98026 states. [2021-07-13 20:33:10,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98026 to 43365. [2021-07-13 20:33:10,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43365 states, 43364 states have (on average 4.146642376164561) internal successors, (179815), 43364 states have internal predecessors, (179815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:10,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43365 states to 43365 states and 179815 transitions. [2021-07-13 20:33:10,429 INFO L78 Accepts]: Start accepts. Automaton has 43365 states and 179815 transitions. Word has length 39 [2021-07-13 20:33:10,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:10,429 INFO L482 AbstractCegarLoop]: Abstraction has 43365 states and 179815 transitions. [2021-07-13 20:33:10,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:10,429 INFO L276 IsEmpty]: Start isEmpty. Operand 43365 states and 179815 transitions. [2021-07-13 20:33:10,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:33:10,527 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:10,527 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:10,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable453,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:10,728 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:10,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:10,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1184812599, now seen corresponding path program 88 times [2021-07-13 20:33:10,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:10,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623006851] [2021-07-13 20:33:10,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:10,974 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:10,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:10,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623006851] [2021-07-13 20:33:10,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623006851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:10,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238594804] [2021-07-13 20:33:10,975 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 20:33:11,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:33:11,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:11,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:33:11,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:11,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:33:11,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:11,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:11,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:11,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-07-13 20:33:11,448 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:33:11,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-13 20:33:11,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:11,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:11,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:11,450 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:33:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:11,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238594804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:11,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:11,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:33:11,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284115343] [2021-07-13 20:33:11,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:33:11,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:11,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:33:11,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:33:11,491 INFO L87 Difference]: Start difference. First operand 43365 states and 179815 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:13,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:13,751 INFO L93 Difference]: Finished difference Result 100263 states and 410482 transitions. [2021-07-13 20:33:13,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:33:13,751 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:33:13,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:14,235 INFO L225 Difference]: With dead ends: 100263 [2021-07-13 20:33:14,235 INFO L226 Difference]: Without dead ends: 100208 [2021-07-13 20:33:14,236 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 1212.3ms TimeCoverageRelationStatistics Valid=433, Invalid=2017, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:33:14,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100208 states. [2021-07-13 20:33:15,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100208 to 41371. [2021-07-13 20:33:15,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41371 states, 41370 states have (on average 4.146531302876481) internal successors, (171542), 41370 states have internal predecessors, (171542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:15,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41371 states to 41371 states and 171542 transitions. [2021-07-13 20:33:15,991 INFO L78 Accepts]: Start accepts. Automaton has 41371 states and 171542 transitions. Word has length 39 [2021-07-13 20:33:15,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:15,991 INFO L482 AbstractCegarLoop]: Abstraction has 41371 states and 171542 transitions. [2021-07-13 20:33:15,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:15,991 INFO L276 IsEmpty]: Start isEmpty. Operand 41371 states and 171542 transitions. [2021-07-13 20:33:16,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:33:16,364 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:16,364 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:16,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:16,576 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:16,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:16,576 INFO L82 PathProgramCache]: Analyzing trace with hash 2134546223, now seen corresponding path program 89 times [2021-07-13 20:33:16,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:16,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809738875] [2021-07-13 20:33:16,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:16,822 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:16,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:16,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809738875] [2021-07-13 20:33:16,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809738875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:16,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299837373] [2021-07-13 20:33:16,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:33:16,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:33:16,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:16,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:33:16,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:16,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-07-13 20:33:16,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:17,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:17,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:17,000 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:28 [2021-07-13 20:33:17,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:17,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 52 [2021-07-13 20:33:17,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:17,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:17,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:33:17,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:30 [2021-07-13 20:33:17,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:17,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:17,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:17,179 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:17,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2021-07-13 20:33:17,182 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:33:17,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:17,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:33:17,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:33 [2021-07-13 20:33:17,272 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:17,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299837373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:17,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:17,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-13 20:33:17,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581377092] [2021-07-13 20:33:17,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:33:17,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:17,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:33:17,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:33:17,273 INFO L87 Difference]: Start difference. First operand 41371 states and 171542 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:22,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:22,047 INFO L93 Difference]: Finished difference Result 111193 states and 459274 transitions. [2021-07-13 20:33:22,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:33:22,048 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:33:22,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:22,588 INFO L225 Difference]: With dead ends: 111193 [2021-07-13 20:33:22,589 INFO L226 Difference]: Without dead ends: 111083 [2021-07-13 20:33:22,589 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2098 ImplicationChecksByTransitivity, 2856.8ms TimeCoverageRelationStatistics Valid=1109, Invalid=5211, Unknown=0, NotChecked=0, Total=6320 [2021-07-13 20:33:22,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111083 states. [2021-07-13 20:33:24,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111083 to 42114. [2021-07-13 20:33:24,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42114 states, 42113 states have (on average 4.147104219599648) internal successors, (174647), 42113 states have internal predecessors, (174647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:24,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42114 states to 42114 states and 174647 transitions. [2021-07-13 20:33:24,750 INFO L78 Accepts]: Start accepts. Automaton has 42114 states and 174647 transitions. Word has length 39 [2021-07-13 20:33:24,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:24,750 INFO L482 AbstractCegarLoop]: Abstraction has 42114 states and 174647 transitions. [2021-07-13 20:33:24,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:24,750 INFO L276 IsEmpty]: Start isEmpty. Operand 42114 states and 174647 transitions. [2021-07-13 20:33:24,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:33:24,845 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:24,845 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:25,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:25,045 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:25,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:25,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1523150135, now seen corresponding path program 90 times [2021-07-13 20:33:25,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:25,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676577767] [2021-07-13 20:33:25,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:25,297 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:25,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:25,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676577767] [2021-07-13 20:33:25,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676577767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:25,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564488929] [2021-07-13 20:33:25,298 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 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 20:33:25,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:33:25,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:25,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 20:33:25,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:25,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:33:25,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:25,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:25,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:25,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-07-13 20:33:25,529 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:33:25,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-07-13 20:33:25,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:25,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:25,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:25,531 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:15 [2021-07-13 20:33:25,587 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:25,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564488929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:25,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:25,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:33:25,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701624837] [2021-07-13 20:33:25,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:33:25,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:25,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:33:25,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:33:25,588 INFO L87 Difference]: Start difference. First operand 42114 states and 174647 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:27,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:27,924 INFO L93 Difference]: Finished difference Result 96972 states and 397209 transitions. [2021-07-13 20:33:27,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:33:27,925 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:33:27,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:28,878 INFO L225 Difference]: With dead ends: 96972 [2021-07-13 20:33:28,878 INFO L226 Difference]: Without dead ends: 96917 [2021-07-13 20:33:28,878 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 967.0ms TimeCoverageRelationStatistics Valid=379, Invalid=1877, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:33:28,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96917 states. [2021-07-13 20:33:30,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96917 to 41581. [2021-07-13 20:33:30,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41581 states, 41580 states have (on average 4.149446849446849) internal successors, (172534), 41580 states have internal predecessors, (172534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:30,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41581 states to 41581 states and 172534 transitions. [2021-07-13 20:33:30,611 INFO L78 Accepts]: Start accepts. Automaton has 41581 states and 172534 transitions. Word has length 39 [2021-07-13 20:33:30,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:30,611 INFO L482 AbstractCegarLoop]: Abstraction has 41581 states and 172534 transitions. [2021-07-13 20:33:30,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:30,612 INFO L276 IsEmpty]: Start isEmpty. Operand 41581 states and 172534 transitions. [2021-07-13 20:33:30,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:33:30,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:30,705 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:30,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-07-13 20:33:30,907 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:30,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:30,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1346065441, now seen corresponding path program 91 times [2021-07-13 20:33:30,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:30,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572586636] [2021-07-13 20:33:30,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:30,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:31,340 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-07-13 20:33:31,407 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:31,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:31,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572586636] [2021-07-13 20:33:31,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572586636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:31,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058420261] [2021-07-13 20:33:31,407 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 20:33:31,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:31,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:33:31,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:31,567 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:33:31,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:33:31,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:31,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:31,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:31,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-07-13 20:33:31,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:33:31,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:31,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:31,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:31,685 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:33:31,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:31,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058420261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:31,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:31,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:33:31,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605095504] [2021-07-13 20:33:31,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:33:31,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:31,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:33:31,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:33:31,728 INFO L87 Difference]: Start difference. First operand 41581 states and 172534 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:33,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:33,442 INFO L93 Difference]: Finished difference Result 70550 states and 289014 transitions. [2021-07-13 20:33:33,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:33:33,443 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:33:33,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:33,863 INFO L225 Difference]: With dead ends: 70550 [2021-07-13 20:33:33,864 INFO L226 Difference]: Without dead ends: 70358 [2021-07-13 20:33:33,864 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1198.6ms TimeCoverageRelationStatistics Valid=307, Invalid=1499, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:33:33,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70358 states. [2021-07-13 20:33:34,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70358 to 41754. [2021-07-13 20:33:34,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41754 states, 41753 states have (on average 4.147246904414054) internal successors, (173160), 41753 states have internal predecessors, (173160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:35,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41754 states to 41754 states and 173160 transitions. [2021-07-13 20:33:35,328 INFO L78 Accepts]: Start accepts. Automaton has 41754 states and 173160 transitions. Word has length 39 [2021-07-13 20:33:35,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:35,328 INFO L482 AbstractCegarLoop]: Abstraction has 41754 states and 173160 transitions. [2021-07-13 20:33:35,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:35,328 INFO L276 IsEmpty]: Start isEmpty. Operand 41754 states and 173160 transitions. [2021-07-13 20:33:35,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:33:35,428 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:35,428 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:35,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:35,628 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:35,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:35,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1579983005, now seen corresponding path program 92 times [2021-07-13 20:33:35,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:35,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114209380] [2021-07-13 20:33:35,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:35,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:35,914 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:35,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:35,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114209380] [2021-07-13 20:33:35,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114209380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:35,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206429680] [2021-07-13 20:33:35,915 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 20:33:35,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:33:35,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:35,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:33:35,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:36,066 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:33:36,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:33:36,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:36,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:36,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:36,072 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-07-13 20:33:36,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:33:36,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:36,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:36,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:36,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:33:36,225 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:36,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206429680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:36,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:36,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:33:36,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039489764] [2021-07-13 20:33:36,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:33:36,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:36,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:33:36,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:33:36,226 INFO L87 Difference]: Start difference. First operand 41754 states and 173160 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:36,608 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-07-13 20:33:38,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:38,367 INFO L93 Difference]: Finished difference Result 71559 states and 293044 transitions. [2021-07-13 20:33:38,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:33:38,368 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:33:38,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:38,658 INFO L225 Difference]: With dead ends: 71559 [2021-07-13 20:33:38,658 INFO L226 Difference]: Without dead ends: 71343 [2021-07-13 20:33:38,658 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1327.6ms TimeCoverageRelationStatistics Valid=377, Invalid=1785, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:33:38,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71343 states. [2021-07-13 20:33:39,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71343 to 41816. [2021-07-13 20:33:39,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41816 states, 41815 states have (on average 4.1483678105942845) internal successors, (173464), 41815 states have internal predecessors, (173464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:40,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41816 states to 41816 states and 173464 transitions. [2021-07-13 20:33:40,060 INFO L78 Accepts]: Start accepts. Automaton has 41816 states and 173464 transitions. Word has length 39 [2021-07-13 20:33:40,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:40,061 INFO L482 AbstractCegarLoop]: Abstraction has 41816 states and 173464 transitions. [2021-07-13 20:33:40,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:40,061 INFO L276 IsEmpty]: Start isEmpty. Operand 41816 states and 173464 transitions. [2021-07-13 20:33:40,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:33:40,424 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:40,424 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:40,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:40,640 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:40,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:40,640 INFO L82 PathProgramCache]: Analyzing trace with hash 231872611, now seen corresponding path program 93 times [2021-07-13 20:33:40,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:40,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597767084] [2021-07-13 20:33:40,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:40,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:40,885 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:40,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:40,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597767084] [2021-07-13 20:33:40,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597767084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:40,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788970459] [2021-07-13 20:33:40,885 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 20:33:40,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:33:40,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:40,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 20:33:40,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:41,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:41,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:41,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-07-13 20:33:41,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:41,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:41,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:41,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:85 [2021-07-13 20:33:41,212 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:41,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 38 [2021-07-13 20:33:41,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:41,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:41,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:41,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:43 [2021-07-13 20:33:41,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:41,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:41,331 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 29 [2021-07-13 20:33:41,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:33:41,342 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:33:41,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 12 [2021-07-13 20:33:41,343 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:41,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:41,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-07-13 20:33:41,348 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:41,401 INFO L628 ElimStorePlain]: treesize reduction 36, result has 60.0 percent of original size [2021-07-13 20:33:41,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:33:41,402 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:111, output treesize:45 [2021-07-13 20:33:41,527 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:41,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788970459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:41,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:41,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-13 20:33:41,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18233579] [2021-07-13 20:33:41,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:33:41,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:41,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:33:41,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:33:41,528 INFO L87 Difference]: Start difference. First operand 41816 states and 173464 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:44,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:44,401 INFO L93 Difference]: Finished difference Result 69576 states and 283666 transitions. [2021-07-13 20:33:44,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:33:44,402 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:33:44,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:44,665 INFO L225 Difference]: With dead ends: 69576 [2021-07-13 20:33:44,666 INFO L226 Difference]: Without dead ends: 69466 [2021-07-13 20:33:44,666 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 1971.0ms TimeCoverageRelationStatistics Valid=668, Invalid=2638, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:33:44,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69466 states. [2021-07-13 20:33:45,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69466 to 42033. [2021-07-13 20:33:45,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42033 states, 42032 states have (on average 4.145365435858394) internal successors, (174238), 42032 states have internal predecessors, (174238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:46,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42033 states to 42033 states and 174238 transitions. [2021-07-13 20:33:46,063 INFO L78 Accepts]: Start accepts. Automaton has 42033 states and 174238 transitions. Word has length 39 [2021-07-13 20:33:46,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:46,063 INFO L482 AbstractCegarLoop]: Abstraction has 42033 states and 174238 transitions. [2021-07-13 20:33:46,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:46,063 INFO L276 IsEmpty]: Start isEmpty. Operand 42033 states and 174238 transitions. [2021-07-13 20:33:46,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:33:46,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:46,150 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:46,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:46,351 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:46,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:46,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1449964299, now seen corresponding path program 94 times [2021-07-13 20:33:46,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:46,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96597261] [2021-07-13 20:33:46,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:46,597 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:46,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:46,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96597261] [2021-07-13 20:33:46,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96597261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:46,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108764962] [2021-07-13 20:33:46,598 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 20:33:46,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:33:46,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:46,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:33:46,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:46,760 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:33:46,760 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 28 treesize of output 16 [2021-07-13 20:33:46,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:46,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:46,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:46,766 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-07-13 20:33:46,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 20:33:46,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:46,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:46,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:46,848 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-07-13 20:33:47,102 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:47,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108764962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:47,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:47,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:33:47,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151312948] [2021-07-13 20:33:47,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:33:47,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:47,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:33:47,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:33:47,103 INFO L87 Difference]: Start difference. First operand 42033 states and 174238 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:49,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:49,027 INFO L93 Difference]: Finished difference Result 89826 states and 367488 transitions. [2021-07-13 20:33:49,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:33:49,027 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:33:49,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:49,580 INFO L225 Difference]: With dead ends: 89826 [2021-07-13 20:33:49,580 INFO L226 Difference]: Without dead ends: 89771 [2021-07-13 20:33:49,580 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1139.2ms TimeCoverageRelationStatistics Valid=334, Invalid=1828, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:33:49,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89771 states. [2021-07-13 20:33:51,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89771 to 41715. [2021-07-13 20:33:51,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41715 states, 41714 states have (on average 4.14752840772882) internal successors, (173010), 41714 states have internal predecessors, (173010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:51,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41715 states to 41715 states and 173010 transitions. [2021-07-13 20:33:51,257 INFO L78 Accepts]: Start accepts. Automaton has 41715 states and 173010 transitions. Word has length 39 [2021-07-13 20:33:51,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:51,257 INFO L482 AbstractCegarLoop]: Abstraction has 41715 states and 173010 transitions. [2021-07-13 20:33:51,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:51,257 INFO L276 IsEmpty]: Start isEmpty. Operand 41715 states and 173010 transitions. [2021-07-13 20:33:51,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:33:51,360 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:51,360 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:51,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-07-13 20:33:51,560 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:51,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:51,561 INFO L82 PathProgramCache]: Analyzing trace with hash 401310577, now seen corresponding path program 95 times [2021-07-13 20:33:51,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:51,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140845094] [2021-07-13 20:33:51,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:51,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:52,119 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:52,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:52,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140845094] [2021-07-13 20:33:52,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140845094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:52,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626419957] [2021-07-13 20:33:52,119 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 20:33:52,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:33:52,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:52,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:33:52,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:52,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:52,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:52,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:52,333 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:52,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2021-07-13 20:33:52,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:33:52,364 INFO L628 ElimStorePlain]: treesize reduction 37, result has 54.3 percent of original size [2021-07-13 20:33:52,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:52,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:45 [2021-07-13 20:33:52,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:33:52,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:52,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:52,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:52,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:33:52,544 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:52,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626419957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:52,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:52,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-07-13 20:33:52,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773819612] [2021-07-13 20:33:52,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:33:52,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:52,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:33:52,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:33:52,545 INFO L87 Difference]: Start difference. First operand 41715 states and 173010 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:55,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:55,050 INFO L93 Difference]: Finished difference Result 68574 states and 280232 transitions. [2021-07-13 20:33:55,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:33:55,050 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:33:55,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:55,309 INFO L225 Difference]: With dead ends: 68574 [2021-07-13 20:33:55,309 INFO L226 Difference]: Without dead ends: 68446 [2021-07-13 20:33:55,310 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1710.8ms TimeCoverageRelationStatistics Valid=409, Invalid=2347, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:33:55,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68446 states. [2021-07-13 20:33:56,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68446 to 42130. [2021-07-13 20:33:56,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42130 states, 42129 states have (on average 4.142562130598875) internal successors, (174522), 42129 states have internal predecessors, (174522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:56,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42130 states to 42130 states and 174522 transitions. [2021-07-13 20:33:56,654 INFO L78 Accepts]: Start accepts. Automaton has 42130 states and 174522 transitions. Word has length 39 [2021-07-13 20:33:56,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:56,654 INFO L482 AbstractCegarLoop]: Abstraction has 42130 states and 174522 transitions. [2021-07-13 20:33:56,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:56,655 INFO L276 IsEmpty]: Start isEmpty. Operand 42130 states and 174522 transitions. [2021-07-13 20:33:56,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:33:56,746 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:56,746 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:56,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-07-13 20:33:56,946 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:56,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:56,947 INFO L82 PathProgramCache]: Analyzing trace with hash 167393013, now seen corresponding path program 96 times [2021-07-13 20:33:56,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:56,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674799552] [2021-07-13 20:33:56,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:57,439 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:57,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:57,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674799552] [2021-07-13 20:33:57,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674799552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:57,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104294882] [2021-07-13 20:33:57,440 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 20:33:57,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:33:57,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:57,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-13 20:33:57,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:57,650 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:57,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2021-07-13 20:33:57,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:57,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:57,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:57,678 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:43 [2021-07-13 20:33:57,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:33:57,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:57,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:57,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:57,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:33:57,850 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:57,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104294882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:57,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:57,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-07-13 20:33:57,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222637980] [2021-07-13 20:33:57,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:33:57,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:57,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:33:57,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:33:57,851 INFO L87 Difference]: Start difference. First operand 42130 states and 174522 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:58,918 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-13 20:34:00,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:00,254 INFO L93 Difference]: Finished difference Result 69626 states and 284381 transitions. [2021-07-13 20:34:00,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:34:00,255 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:34:00,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:00,521 INFO L225 Difference]: With dead ends: 69626 [2021-07-13 20:34:00,522 INFO L226 Difference]: Without dead ends: 69498 [2021-07-13 20:34:00,522 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 1751.7ms TimeCoverageRelationStatistics Valid=435, Invalid=2427, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:34:00,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69498 states. [2021-07-13 20:34:01,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69498 to 42280. [2021-07-13 20:34:01,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42280 states, 42279 states have (on average 4.141772511175761) internal successors, (175110), 42279 states have internal predecessors, (175110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:01,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42280 states to 42280 states and 175110 transitions. [2021-07-13 20:34:01,960 INFO L78 Accepts]: Start accepts. Automaton has 42280 states and 175110 transitions. Word has length 39 [2021-07-13 20:34:01,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:01,960 INFO L482 AbstractCegarLoop]: Abstraction has 42280 states and 175110 transitions. [2021-07-13 20:34:01,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:01,960 INFO L276 IsEmpty]: Start isEmpty. Operand 42280 states and 175110 transitions. [2021-07-13 20:34:02,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:34:02,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:02,061 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:02,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:02,261 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:02,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:02,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1979248629, now seen corresponding path program 97 times [2021-07-13 20:34:02,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:02,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843293662] [2021-07-13 20:34:02,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:02,531 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:02,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:02,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843293662] [2021-07-13 20:34:02,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843293662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:02,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882047800] [2021-07-13 20:34:02,532 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 20:34:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:02,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:34:02,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:02,898 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:34:02,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:02,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:02,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:02,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:02,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-07-13 20:34:02,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 20:34:02,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:02,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:02,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:02,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-07-13 20:34:03,027 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:03,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882047800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:03,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:03,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:34:03,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750997343] [2021-07-13 20:34:03,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:34:03,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:03,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:34:03,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:34:03,028 INFO L87 Difference]: Start difference. First operand 42280 states and 175110 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:04,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:04,646 INFO L93 Difference]: Finished difference Result 75888 states and 312435 transitions. [2021-07-13 20:34:04,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:34:04,646 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:34:04,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:04,935 INFO L225 Difference]: With dead ends: 75888 [2021-07-13 20:34:04,935 INFO L226 Difference]: Without dead ends: 75833 [2021-07-13 20:34:04,936 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 819.1ms TimeCoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:34:05,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75833 states. [2021-07-13 20:34:06,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75833 to 42258. [2021-07-13 20:34:06,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42258 states, 42257 states have (on average 4.142248621530161) internal successors, (175039), 42257 states have internal predecessors, (175039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:06,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42258 states to 42258 states and 175039 transitions. [2021-07-13 20:34:06,510 INFO L78 Accepts]: Start accepts. Automaton has 42258 states and 175039 transitions. Word has length 39 [2021-07-13 20:34:06,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:06,511 INFO L482 AbstractCegarLoop]: Abstraction has 42258 states and 175039 transitions. [2021-07-13 20:34:06,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:06,511 INFO L276 IsEmpty]: Start isEmpty. Operand 42258 states and 175039 transitions. [2021-07-13 20:34:06,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:34:06,611 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:06,611 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:06,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:06,811 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:06,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:06,812 INFO L82 PathProgramCache]: Analyzing trace with hash 210357187, now seen corresponding path program 98 times [2021-07-13 20:34:06,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:06,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082938487] [2021-07-13 20:34:06,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:07,129 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:07,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:07,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082938487] [2021-07-13 20:34:07,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082938487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:07,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85747954] [2021-07-13 20:34:07,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:34:07,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:34:07,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:07,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:34:07,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:07,323 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:34:07,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:07,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:07,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:07,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:07,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-07-13 20:34:07,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:34:07,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:07,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:07,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:07,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:34:07,473 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:07,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85747954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:07,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:07,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:34:07,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336740680] [2021-07-13 20:34:07,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:34:07,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:07,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:34:07,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:34:07,474 INFO L87 Difference]: Start difference. First operand 42258 states and 175039 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:09,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:09,696 INFO L93 Difference]: Finished difference Result 85721 states and 348629 transitions. [2021-07-13 20:34:09,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:34:09,696 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:34:09,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:10,069 INFO L225 Difference]: With dead ends: 85721 [2021-07-13 20:34:10,070 INFO L226 Difference]: Without dead ends: 85537 [2021-07-13 20:34:10,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1116.6ms TimeCoverageRelationStatistics Valid=365, Invalid=1797, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:34:10,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85537 states. [2021-07-13 20:34:11,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85537 to 42230. [2021-07-13 20:34:11,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42230 states, 42229 states have (on average 4.142769187051552) internal successors, (174945), 42229 states have internal predecessors, (174945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:11,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42230 states to 42230 states and 174945 transitions. [2021-07-13 20:34:11,830 INFO L78 Accepts]: Start accepts. Automaton has 42230 states and 174945 transitions. Word has length 39 [2021-07-13 20:34:11,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:11,830 INFO L482 AbstractCegarLoop]: Abstraction has 42230 states and 174945 transitions. [2021-07-13 20:34:11,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:11,830 INFO L276 IsEmpty]: Start isEmpty. Operand 42230 states and 174945 transitions. [2021-07-13 20:34:11,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:34:11,927 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:11,928 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:12,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-07-13 20:34:12,128 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:12,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:12,128 INFO L82 PathProgramCache]: Analyzing trace with hash -912760441, now seen corresponding path program 99 times [2021-07-13 20:34:12,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:12,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155374266] [2021-07-13 20:34:12,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:12,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:12,429 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:12,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:12,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155374266] [2021-07-13 20:34:12,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155374266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:12,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787602056] [2021-07-13 20:34:12,429 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 20:34:12,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:34:12,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:12,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:34:12,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:12,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:12,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:12,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-07-13 20:34:12,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:12,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:12,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:12,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:88 [2021-07-13 20:34:12,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-07-13 20:34:12,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:12,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:12,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:12,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:9 [2021-07-13 20:34:12,981 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-07-13 20:34:12,981 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:12,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:34:12,983 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:34:12,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:12,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:34:12,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-13 20:34:13,036 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:13,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787602056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:13,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:13,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-13 20:34:13,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917940450] [2021-07-13 20:34:13,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:34:13,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:13,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:34:13,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:34:13,037 INFO L87 Difference]: Start difference. First operand 42230 states and 174945 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:16,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:16,520 INFO L93 Difference]: Finished difference Result 89279 states and 362432 transitions. [2021-07-13 20:34:16,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:34:16,520 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:34:16,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:16,863 INFO L225 Difference]: With dead ends: 89279 [2021-07-13 20:34:16,863 INFO L226 Difference]: Without dead ends: 88857 [2021-07-13 20:34:16,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 2129.6ms TimeCoverageRelationStatistics Valid=747, Invalid=4083, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:34:17,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88857 states. [2021-07-13 20:34:18,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88857 to 41749. [2021-07-13 20:34:18,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41749 states, 41748 states have (on average 4.147408259078279) internal successors, (173146), 41748 states have internal predecessors, (173146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:18,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41749 states to 41749 states and 173146 transitions. [2021-07-13 20:34:18,637 INFO L78 Accepts]: Start accepts. Automaton has 41749 states and 173146 transitions. Word has length 39 [2021-07-13 20:34:18,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:18,637 INFO L482 AbstractCegarLoop]: Abstraction has 41749 states and 173146 transitions. [2021-07-13 20:34:18,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:18,637 INFO L276 IsEmpty]: Start isEmpty. Operand 41749 states and 173146 transitions. [2021-07-13 20:34:18,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:34:18,735 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:18,735 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:18,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-07-13 20:34:18,936 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:18,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:18,936 INFO L82 PathProgramCache]: Analyzing trace with hash -6081193, now seen corresponding path program 100 times [2021-07-13 20:34:18,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:18,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852141543] [2021-07-13 20:34:18,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:19,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:19,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852141543] [2021-07-13 20:34:19,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852141543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:19,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702827169] [2021-07-13 20:34:19,271 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 20:34:19,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:34:19,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:19,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:34:19,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:19,495 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:34:19,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-07-13 20:34:19,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:19,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:19,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:19,503 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-07-13 20:34:19,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:34:19,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:19,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:19,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:19,568 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:34:19,609 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:19,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702827169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:19,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:19,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:34:19,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492003462] [2021-07-13 20:34:19,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:34:19,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:19,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:34:19,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:34:19,610 INFO L87 Difference]: Start difference. First operand 41749 states and 173146 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:21,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:21,501 INFO L93 Difference]: Finished difference Result 70246 states and 287846 transitions. [2021-07-13 20:34:21,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:34:21,501 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:34:21,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:21,779 INFO L225 Difference]: With dead ends: 70246 [2021-07-13 20:34:21,779 INFO L226 Difference]: Without dead ends: 70054 [2021-07-13 20:34:21,779 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1002.9ms TimeCoverageRelationStatistics Valid=311, Invalid=1411, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:34:21,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70054 states. [2021-07-13 20:34:22,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70054 to 41773. [2021-07-13 20:34:23,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41773 states, 41772 states have (on average 4.147036292253184) internal successors, (173230), 41772 states have internal predecessors, (173230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:23,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41773 states to 41773 states and 173230 transitions. [2021-07-13 20:34:23,198 INFO L78 Accepts]: Start accepts. Automaton has 41773 states and 173230 transitions. Word has length 39 [2021-07-13 20:34:23,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:23,198 INFO L482 AbstractCegarLoop]: Abstraction has 41773 states and 173230 transitions. [2021-07-13 20:34:23,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:23,198 INFO L276 IsEmpty]: Start isEmpty. Operand 41773 states and 173230 transitions. [2021-07-13 20:34:23,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:34:23,295 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:23,295 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:23,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-07-13 20:34:23,496 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:23,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:23,496 INFO L82 PathProgramCache]: Analyzing trace with hash 2143700845, now seen corresponding path program 101 times [2021-07-13 20:34:23,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:23,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062413277] [2021-07-13 20:34:23,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:23,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:24,049 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:24,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:24,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062413277] [2021-07-13 20:34:24,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062413277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:24,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651012691] [2021-07-13 20:34:24,050 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 20:34:24,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:34:24,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:24,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:34:24,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:24,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:24,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 53 [2021-07-13 20:34:24,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:34:24,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:24,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:34:24,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:54 [2021-07-13 20:34:24,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:34:24,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 20:34:24,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:24,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:24,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:34:24,562 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:27 [2021-07-13 20:34:24,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:24,645 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:24,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-07-13 20:34:24,648 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:34:24,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:24,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:34:24,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-07-13 20:34:24,713 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:24,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651012691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:24,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:24,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:34:24,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80484025] [2021-07-13 20:34:24,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:34:24,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:24,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:34:24,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:34:24,714 INFO L87 Difference]: Start difference. First operand 41773 states and 173230 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:25,188 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-07-13 20:34:29,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:29,045 INFO L93 Difference]: Finished difference Result 76909 states and 314617 transitions. [2021-07-13 20:34:29,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:34:29,045 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:34:29,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:29,329 INFO L225 Difference]: With dead ends: 76909 [2021-07-13 20:34:29,330 INFO L226 Difference]: Without dead ends: 76688 [2021-07-13 20:34:29,330 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1471 ImplicationChecksByTransitivity, 3093.9ms TimeCoverageRelationStatistics Valid=813, Invalid=4887, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 20:34:29,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76688 states. [2021-07-13 20:34:30,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76688 to 42250. [2021-07-13 20:34:30,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42250 states, 42249 states have (on average 4.141447134843428) internal successors, (174972), 42249 states have internal predecessors, (174972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:30,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42250 states to 42250 states and 174972 transitions. [2021-07-13 20:34:30,708 INFO L78 Accepts]: Start accepts. Automaton has 42250 states and 174972 transitions. Word has length 39 [2021-07-13 20:34:30,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:30,708 INFO L482 AbstractCegarLoop]: Abstraction has 42250 states and 174972 transitions. [2021-07-13 20:34:30,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:30,708 INFO L276 IsEmpty]: Start isEmpty. Operand 42250 states and 174972 transitions. [2021-07-13 20:34:30,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:34:30,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:30,796 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:30,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:30,997 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:30,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:30,997 INFO L82 PathProgramCache]: Analyzing trace with hash 2053917695, now seen corresponding path program 102 times [2021-07-13 20:34:30,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:30,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252344725] [2021-07-13 20:34:30,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:31,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:31,311 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:31,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:31,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252344725] [2021-07-13 20:34:31,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252344725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:31,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599760371] [2021-07-13 20:34:31,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:34:31,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:34:31,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:31,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 20:34:31,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:31,742 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:34:31,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-07-13 20:34:31,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:31,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:31,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:31,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-07-13 20:34:31,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:34:31,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:31,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:31,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:31,781 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:34:31,822 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:31,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599760371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:31,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:31,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:34:31,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874304637] [2021-07-13 20:34:31,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:34:31,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:31,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:34:31,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:34:31,823 INFO L87 Difference]: Start difference. First operand 42250 states and 174972 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:33,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:33,858 INFO L93 Difference]: Finished difference Result 85820 states and 348935 transitions. [2021-07-13 20:34:33,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:34:33,858 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:34:33,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:34,380 INFO L225 Difference]: With dead ends: 85820 [2021-07-13 20:34:34,380 INFO L226 Difference]: Without dead ends: 85596 [2021-07-13 20:34:34,380 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1367.1ms TimeCoverageRelationStatistics Valid=416, Invalid=1936, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:34:34,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85596 states. [2021-07-13 20:34:35,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85596 to 41959. [2021-07-13 20:34:35,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41959 states, 41958 states have (on average 4.145335812002479) internal successors, (173930), 41958 states have internal predecessors, (173930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:35,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41959 states to 41959 states and 173930 transitions. [2021-07-13 20:34:35,869 INFO L78 Accepts]: Start accepts. Automaton has 41959 states and 173930 transitions. Word has length 39 [2021-07-13 20:34:35,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:35,869 INFO L482 AbstractCegarLoop]: Abstraction has 41959 states and 173930 transitions. [2021-07-13 20:34:35,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:35,869 INFO L276 IsEmpty]: Start isEmpty. Operand 41959 states and 173930 transitions. [2021-07-13 20:34:35,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:34:35,961 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:35,961 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:36,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-07-13 20:34:36,169 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:36,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:36,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1820000131, now seen corresponding path program 103 times [2021-07-13 20:34:36,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:36,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251131340] [2021-07-13 20:34:36,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:36,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:36,488 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:36,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:36,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251131340] [2021-07-13 20:34:36,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251131340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:36,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025845794] [2021-07-13 20:34:36,488 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 20:34:36,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:36,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:34:36,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:36,894 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-07-13 20:34:36,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:34:36,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:36,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:36,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:36,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-13 20:34:36,940 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:34:36,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-13 20:34:36,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:36,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:36,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:36,942 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:34:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:36,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025845794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:36,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:36,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:34:36,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44127969] [2021-07-13 20:34:36,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:34:36,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:36,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:34:36,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:34:36,985 INFO L87 Difference]: Start difference. First operand 41959 states and 173930 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:38,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:38,839 INFO L93 Difference]: Finished difference Result 87518 states and 356426 transitions. [2021-07-13 20:34:38,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:34:38,839 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:34:38,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:39,356 INFO L225 Difference]: With dead ends: 87518 [2021-07-13 20:34:39,356 INFO L226 Difference]: Without dead ends: 87366 [2021-07-13 20:34:39,356 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1238.4ms TimeCoverageRelationStatistics Valid=359, Invalid=1711, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:34:39,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87366 states. [2021-07-13 20:34:40,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87366 to 42029. [2021-07-13 20:34:40,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42029 states, 42028 states have (on average 4.146045493480536) internal successors, (174250), 42028 states have internal predecessors, (174250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:40,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42029 states to 42029 states and 174250 transitions. [2021-07-13 20:34:40,893 INFO L78 Accepts]: Start accepts. Automaton has 42029 states and 174250 transitions. Word has length 39 [2021-07-13 20:34:40,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:40,893 INFO L482 AbstractCegarLoop]: Abstraction has 42029 states and 174250 transitions. [2021-07-13 20:34:40,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:40,893 INFO L276 IsEmpty]: Start isEmpty. Operand 42029 states and 174250 transitions. [2021-07-13 20:34:40,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:34:40,979 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:40,979 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:41,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-07-13 20:34:41,180 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:41,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:41,180 INFO L82 PathProgramCache]: Analyzing trace with hash 2023920877, now seen corresponding path program 104 times [2021-07-13 20:34:41,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:41,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853761419] [2021-07-13 20:34:41,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:41,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:41,496 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:41,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:41,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853761419] [2021-07-13 20:34:41,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853761419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:41,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948273639] [2021-07-13 20:34:41,496 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 20:34:41,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:34:41,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:41,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:34:41,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:41,771 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-07-13 20:34:41,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:34:41,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:41,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:41,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:41,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-13 20:34:42,021 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:34:42,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-13 20:34:42,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:42,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:42,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:42,024 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:34:42,066 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:42,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948273639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:42,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:42,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:34:42,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016341350] [2021-07-13 20:34:42,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:34:42,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:42,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:34:42,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:34:42,067 INFO L87 Difference]: Start difference. First operand 42029 states and 174250 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:43,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:43,710 INFO L93 Difference]: Finished difference Result 73916 states and 302379 transitions. [2021-07-13 20:34:43,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:34:43,711 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:34:43,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:44,126 INFO L225 Difference]: With dead ends: 73916 [2021-07-13 20:34:44,127 INFO L226 Difference]: Without dead ends: 73826 [2021-07-13 20:34:44,127 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 907.1ms TimeCoverageRelationStatistics Valid=272, Invalid=1210, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:34:44,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73826 states. [2021-07-13 20:34:45,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73826 to 41749. [2021-07-13 20:34:45,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41749 states, 41748 states have (on average 4.147408259078279) internal successors, (173146), 41748 states have internal predecessors, (173146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:45,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41749 states to 41749 states and 173146 transitions. [2021-07-13 20:34:45,548 INFO L78 Accepts]: Start accepts. Automaton has 41749 states and 173146 transitions. Word has length 39 [2021-07-13 20:34:45,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:45,548 INFO L482 AbstractCegarLoop]: Abstraction has 41749 states and 173146 transitions. [2021-07-13 20:34:45,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:45,548 INFO L276 IsEmpty]: Start isEmpty. Operand 41749 states and 173146 transitions. [2021-07-13 20:34:45,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:34:45,638 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:45,638 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:45,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-07-13 20:34:45,839 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:45,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:45,839 INFO L82 PathProgramCache]: Analyzing trace with hash 2097565101, now seen corresponding path program 105 times [2021-07-13 20:34:45,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:45,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850957255] [2021-07-13 20:34:45,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:46,122 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:46,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:46,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850957255] [2021-07-13 20:34:46,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850957255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:46,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521908089] [2021-07-13 20:34:46,122 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) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:46,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:34:46,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:46,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:34:46,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:46,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:46,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:46,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-07-13 20:34:46,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:46,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:46,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:46,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:87 [2021-07-13 20:34:46,565 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:46,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 41 [2021-07-13 20:34:46,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:46,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:46,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:34:46,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2021-07-13 20:34:46,806 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:46,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:34:46,807 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:34:46,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:46,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:34:46,827 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:47 [2021-07-13 20:34:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:46,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521908089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:46,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:46,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-07-13 20:34:46,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884126443] [2021-07-13 20:34:46,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:34:46,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:46,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:34:46,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:34:46,973 INFO L87 Difference]: Start difference. First operand 41749 states and 173146 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:48,327 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-07-13 20:34:52,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:52,136 INFO L93 Difference]: Finished difference Result 70259 states and 285004 transitions. [2021-07-13 20:34:52,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-13 20:34:52,136 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:34:52,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:52,401 INFO L225 Difference]: With dead ends: 70259 [2021-07-13 20:34:52,401 INFO L226 Difference]: Without dead ends: 70111 [2021-07-13 20:34:52,401 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2422 ImplicationChecksByTransitivity, 4126.3ms TimeCoverageRelationStatistics Valid=1005, Invalid=6651, Unknown=0, NotChecked=0, Total=7656 [2021-07-13 20:34:52,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70111 states. [2021-07-13 20:34:53,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70111 to 42185. [2021-07-13 20:34:53,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42185 states, 42184 states have (on average 4.144130476009861) internal successors, (174816), 42184 states have internal predecessors, (174816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:53,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42185 states to 42185 states and 174816 transitions. [2021-07-13 20:34:53,793 INFO L78 Accepts]: Start accepts. Automaton has 42185 states and 174816 transitions. Word has length 39 [2021-07-13 20:34:53,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:53,793 INFO L482 AbstractCegarLoop]: Abstraction has 42185 states and 174816 transitions. [2021-07-13 20:34:53,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:53,793 INFO L276 IsEmpty]: Start isEmpty. Operand 42185 states and 174816 transitions. [2021-07-13 20:34:53,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:34:53,882 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:53,882 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:54,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:54,083 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:54,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:54,083 INFO L82 PathProgramCache]: Analyzing trace with hash 415728191, now seen corresponding path program 106 times [2021-07-13 20:34:54,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:54,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887364807] [2021-07-13 20:34:54,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:54,382 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:54,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:54,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887364807] [2021-07-13 20:34:54,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887364807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:54,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938181805] [2021-07-13 20:34:54,383 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 20:34:54,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:34:54,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:54,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:34:54,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:54,598 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-07-13 20:34:54,761 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:34:54,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:34:54,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:54,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:54,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:54,769 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:31 [2021-07-13 20:34:54,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:34:54,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:54,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:54,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:54,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:34:54,867 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:54,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938181805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:54,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:54,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:34:54,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181063016] [2021-07-13 20:34:54,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:34:54,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:54,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:34:54,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:34:54,868 INFO L87 Difference]: Start difference. First operand 42185 states and 174816 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:57,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:57,031 INFO L93 Difference]: Finished difference Result 85984 states and 350132 transitions. [2021-07-13 20:34:57,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:34:57,032 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:34:57,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:57,415 INFO L225 Difference]: With dead ends: 85984 [2021-07-13 20:34:57,415 INFO L226 Difference]: Without dead ends: 85768 [2021-07-13 20:34:57,415 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1432.2ms TimeCoverageRelationStatistics Valid=424, Invalid=2228, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:34:57,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85768 states. [2021-07-13 20:34:58,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85768 to 41935. [2021-07-13 20:34:58,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41935 states, 41934 states have (on average 4.14837601945915) internal successors, (173958), 41934 states have internal predecessors, (173958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:59,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41935 states to 41935 states and 173958 transitions. [2021-07-13 20:34:59,057 INFO L78 Accepts]: Start accepts. Automaton has 41935 states and 173958 transitions. Word has length 39 [2021-07-13 20:34:59,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:59,058 INFO L482 AbstractCegarLoop]: Abstraction has 41935 states and 173958 transitions. [2021-07-13 20:34:59,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:59,058 INFO L276 IsEmpty]: Start isEmpty. Operand 41935 states and 173958 transitions. [2021-07-13 20:34:59,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:34:59,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:59,150 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:59,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable523 [2021-07-13 20:34:59,350 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:59,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:59,351 INFO L82 PathProgramCache]: Analyzing trace with hash -385546579, now seen corresponding path program 107 times [2021-07-13 20:34:59,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:59,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000958645] [2021-07-13 20:34:59,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:59,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:59,647 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-07-13 20:34:59,838 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:59,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:59,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000958645] [2021-07-13 20:34:59,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000958645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:59,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616083982] [2021-07-13 20:34:59,839 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 20:34:59,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:34:59,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:59,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:34:59,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:00,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,133 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:00,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2021-07-13 20:35:00,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:35:00,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:00,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:35:00,153 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:63, output treesize:45 [2021-07-13 20:35:00,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:00,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:00,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 20:35:00,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:00,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:00,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:35:00,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:18 [2021-07-13 20:35:00,389 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:00,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616083982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:00,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:00,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:35:00,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2420772] [2021-07-13 20:35:00,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:35:00,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:00,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:35:00,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:35:00,390 INFO L87 Difference]: Start difference. First operand 41935 states and 173958 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:03,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:03,257 INFO L93 Difference]: Finished difference Result 67534 states and 276182 transitions. [2021-07-13 20:35:03,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:35:03,258 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:35:03,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:03,521 INFO L225 Difference]: With dead ends: 67534 [2021-07-13 20:35:03,522 INFO L226 Difference]: Without dead ends: 67424 [2021-07-13 20:35:03,522 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 1873.1ms TimeCoverageRelationStatistics Valid=420, Invalid=2772, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:35:03,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67424 states. [2021-07-13 20:35:04,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67424 to 42487. [2021-07-13 20:35:04,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42487 states, 42486 states have (on average 4.143011815656922) internal successors, (176020), 42486 states have internal predecessors, (176020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:05,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42487 states to 42487 states and 176020 transitions. [2021-07-13 20:35:05,082 INFO L78 Accepts]: Start accepts. Automaton has 42487 states and 176020 transitions. Word has length 39 [2021-07-13 20:35:05,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:05,082 INFO L482 AbstractCegarLoop]: Abstraction has 42487 states and 176020 transitions. [2021-07-13 20:35:05,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:05,082 INFO L276 IsEmpty]: Start isEmpty. Operand 42487 states and 176020 transitions. [2021-07-13 20:35:05,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:35:05,230 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:05,230 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:05,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable524,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:05,445 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:05,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:05,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1112077505, now seen corresponding path program 108 times [2021-07-13 20:35:05,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:05,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785159196] [2021-07-13 20:35:05,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:05,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:05,725 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:05,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:05,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785159196] [2021-07-13 20:35:05,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785159196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:05,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174734597] [2021-07-13 20:35:05,725 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 20:35:05,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:35:05,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:05,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:35:05,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:05,958 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:35:05,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-07-13 20:35:05,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:05,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:05,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:35:05,967 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-07-13 20:35:05,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-13 20:35:06,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:06,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:06,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:35:06,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:21 [2021-07-13 20:35:06,086 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:06,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:35:06,088 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:35:06,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:06,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:35:06,096 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-13 20:35:06,140 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:06,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174734597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:06,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:06,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-13 20:35:06,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068941851] [2021-07-13 20:35:06,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:35:06,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:06,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:35:06,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:35:06,141 INFO L87 Difference]: Start difference. First operand 42487 states and 176020 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:06,795 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-07-13 20:35:08,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:08,856 INFO L93 Difference]: Finished difference Result 95986 states and 392161 transitions. [2021-07-13 20:35:08,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:35:08,856 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:35:08,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:09,562 INFO L225 Difference]: With dead ends: 95986 [2021-07-13 20:35:09,562 INFO L226 Difference]: Without dead ends: 95876 [2021-07-13 20:35:09,562 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1015 ImplicationChecksByTransitivity, 1701.2ms TimeCoverageRelationStatistics Valid=618, Invalid=2922, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:35:09,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95876 states. [2021-07-13 20:35:11,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95876 to 42654. [2021-07-13 20:35:11,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42654 states, 42653 states have (on average 4.144890160129417) internal successors, (176792), 42653 states have internal predecessors, (176792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:11,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42654 states to 42654 states and 176792 transitions. [2021-07-13 20:35:11,351 INFO L78 Accepts]: Start accepts. Automaton has 42654 states and 176792 transitions. Word has length 39 [2021-07-13 20:35:11,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:11,351 INFO L482 AbstractCegarLoop]: Abstraction has 42654 states and 176792 transitions. [2021-07-13 20:35:11,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:11,351 INFO L276 IsEmpty]: Start isEmpty. Operand 42654 states and 176792 transitions. [2021-07-13 20:35:11,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:35:11,443 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:11,443 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:11,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2021-07-13 20:35:11,644 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:11,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:11,644 INFO L82 PathProgramCache]: Analyzing trace with hash 255965609, now seen corresponding path program 109 times [2021-07-13 20:35:11,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:11,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046813758] [2021-07-13 20:35:11,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:11,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:12,002 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-07-13 20:35:12,305 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:12,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:12,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046813758] [2021-07-13 20:35:12,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046813758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:12,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313221036] [2021-07-13 20:35:12,305 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 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 20:35:12,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:12,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:35:12,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:12,570 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:35:12,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-07-13 20:35:12,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:12,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:12,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:35:12,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-07-13 20:35:12,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:35:12,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:12,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:12,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:35:12,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:35:12,664 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:12,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313221036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:12,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:12,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:35:12,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900070852] [2021-07-13 20:35:12,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:35:12,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:12,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:35:12,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:35:12,665 INFO L87 Difference]: Start difference. First operand 42654 states and 176792 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:14,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:14,489 INFO L93 Difference]: Finished difference Result 72719 states and 297553 transitions. [2021-07-13 20:35:14,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:35:14,489 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:35:14,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:14,939 INFO L225 Difference]: With dead ends: 72719 [2021-07-13 20:35:14,939 INFO L226 Difference]: Without dead ends: 72471 [2021-07-13 20:35:14,940 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1436.5ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:35:15,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72471 states. [2021-07-13 20:35:16,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72471 to 42840. [2021-07-13 20:35:16,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42840 states, 42839 states have (on average 4.1432339690468964) internal successors, (177492), 42839 states have internal predecessors, (177492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:16,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42840 states to 42840 states and 177492 transitions. [2021-07-13 20:35:16,376 INFO L78 Accepts]: Start accepts. Automaton has 42840 states and 177492 transitions. Word has length 39 [2021-07-13 20:35:16,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:16,376 INFO L482 AbstractCegarLoop]: Abstraction has 42840 states and 177492 transitions. [2021-07-13 20:35:16,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:16,376 INFO L276 IsEmpty]: Start isEmpty. Operand 42840 states and 177492 transitions. [2021-07-13 20:35:16,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:35:16,468 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:16,468 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:16,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-07-13 20:35:16,669 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:16,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:16,669 INFO L82 PathProgramCache]: Analyzing trace with hash -381194881, now seen corresponding path program 110 times [2021-07-13 20:35:16,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:16,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082239070] [2021-07-13 20:35:16,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:16,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:16,974 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:16,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:16,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082239070] [2021-07-13 20:35:16,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082239070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:16,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855427359] [2021-07-13 20:35:16,974 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 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 20:35:17,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:35:17,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:17,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:35:17,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:17,427 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-07-13 20:35:17,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:35:17,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:17,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:17,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:35:17,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-13 20:35:17,474 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:35:17,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-13 20:35:17,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:17,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:17,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:35:17,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:35:17,518 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:17,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855427359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:17,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:17,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:35:17,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314178464] [2021-07-13 20:35:17,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:35:17,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:17,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:35:17,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:35:17,519 INFO L87 Difference]: Start difference. First operand 42840 states and 177492 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:19,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:19,287 INFO L93 Difference]: Finished difference Result 88928 states and 362147 transitions. [2021-07-13 20:35:19,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:35:19,287 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:35:19,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:19,800 INFO L225 Difference]: With dead ends: 88928 [2021-07-13 20:35:19,801 INFO L226 Difference]: Without dead ends: 88760 [2021-07-13 20:35:19,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1277.1ms TimeCoverageRelationStatistics Valid=356, Invalid=1806, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:35:19,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88760 states. [2021-07-13 20:35:21,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88760 to 42910. [2021-07-13 20:35:21,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42910 states, 42909 states have (on average 4.143932508331585) internal successors, (177812), 42909 states have internal predecessors, (177812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:21,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42910 states to 42910 states and 177812 transitions. [2021-07-13 20:35:21,367 INFO L78 Accepts]: Start accepts. Automaton has 42910 states and 177812 transitions. Word has length 39 [2021-07-13 20:35:21,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:21,367 INFO L482 AbstractCegarLoop]: Abstraction has 42910 states and 177812 transitions. [2021-07-13 20:35:21,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:21,367 INFO L276 IsEmpty]: Start isEmpty. Operand 42910 states and 177812 transitions. [2021-07-13 20:35:21,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:35:21,460 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:21,460 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:21,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable533 [2021-07-13 20:35:21,661 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:21,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:21,661 INFO L82 PathProgramCache]: Analyzing trace with hash -177274135, now seen corresponding path program 111 times [2021-07-13 20:35:21,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:21,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553736131] [2021-07-13 20:35:21,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:21,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:22,118 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-07-13 20:35:22,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:22,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:22,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553736131] [2021-07-13 20:35:22,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553736131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:22,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449910843] [2021-07-13 20:35:22,199 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 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 20:35:22,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:35:22,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:22,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 20:35:22,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:22,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:22,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 49 [2021-07-13 20:35:22,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:22,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:22,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:35:22,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:72 [2021-07-13 20:35:22,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,667 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:22,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 58 [2021-07-13 20:35:22,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:22,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:22,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-07-13 20:35:22,685 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:22,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:22,701 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:22,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-07-13 20:35:22,702 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:22,709 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:35:22,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-07-13 20:35:22,710 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:22,805 INFO L628 ElimStorePlain]: treesize reduction 61, result has 69.8 percent of original size [2021-07-13 20:35:22,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:35:22,813 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:257, output treesize:187 [2021-07-13 20:35:22,968 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:22,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:35:22,970 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:35:23,090 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-07-13 20:35:23,090 INFO L628 ElimStorePlain]: treesize reduction 26, result has 85.7 percent of original size [2021-07-13 20:35:23,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:23,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:35:23,099 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:35:23,213 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-07-13 20:35:23,213 INFO L628 ElimStorePlain]: treesize reduction 10, result has 93.5 percent of original size [2021-07-13 20:35:23,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:23,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:35:23,222 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:35:23,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:23,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:35:23,289 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:183, output treesize:150 [2021-07-13 20:35:23,627 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:23,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449910843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:23,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:23,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-07-13 20:35:23,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443046893] [2021-07-13 20:35:23,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:35:23,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:23,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:35:23,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:35:23,628 INFO L87 Difference]: Start difference. First operand 42910 states and 177812 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:24,312 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2021-07-13 20:35:25,889 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-07-13 20:35:26,329 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 63 [2021-07-13 20:35:26,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:26,916 INFO L93 Difference]: Finished difference Result 68366 states and 278091 transitions. [2021-07-13 20:35:26,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:35:26,917 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:35:26,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:27,165 INFO L225 Difference]: With dead ends: 68366 [2021-07-13 20:35:27,166 INFO L226 Difference]: Without dead ends: 68218 [2021-07-13 20:35:27,166 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 2817.8ms TimeCoverageRelationStatistics Valid=577, Invalid=2963, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:35:27,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68218 states.