/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/nonblocking-cntr-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:04:59,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:04:59,399 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:04:59,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:04:59,441 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-13 20:04:59,442 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-13 20:04:59,442 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-13 20:04:59,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-13 20:04:59,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-13 20:04:59,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-13 20:04:59,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-13 20:04:59,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-13 20:04:59,469 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-13 20:04:59,470 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-13 20:04:59,471 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-13 20:04:59,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-13 20:04:59,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-07-13 20:04:59,488 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 20:04:59,513 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:04:59,514 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:04:59,514 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:04:59,514 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:04:59,516 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:04:59,516 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:04:59,516 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:04:59,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:04:59,517 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:04:59,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:04:59,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:04:59,518 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:04:59,518 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:04:59,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:04:59,518 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:04:59,518 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:04:59,518 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:04:59,518 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:04:59,518 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:04:59,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:04:59,518 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:04:59,519 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:04:59,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:04:59,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:04:59,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:04:59,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:04:59,519 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:04:59,519 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:04:59,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:04:59,519 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:04:59,519 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:04:59,520 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:04:59,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:04:59,774 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:04:59,777 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:04:59,777 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:04:59,778 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:04:59,779 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr-alt.wvr.bpl [2021-07-13 20:04:59,779 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr-alt.wvr.bpl' [2021-07-13 20:04:59,803 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:04:59,804 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:04:59,805 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:04:59,805 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:04:59,806 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:04:59,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:04:59" (1/1) ... [2021-07-13 20:04:59,819 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:04:59" (1/1) ... [2021-07-13 20:04:59,824 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:04:59,825 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:04:59,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:04:59,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:04:59,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:04:59" (1/1) ... [2021-07-13 20:04:59,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:04:59" (1/1) ... [2021-07-13 20:04:59,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:04:59" (1/1) ... [2021-07-13 20:04:59,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:04:59" (1/1) ... [2021-07-13 20:04:59,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:04:59" (1/1) ... [2021-07-13 20:04:59,835 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:04:59" (1/1) ... [2021-07-13 20:04:59,836 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:04:59" (1/1) ... [2021-07-13 20:04:59,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:04:59,837 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:04:59,837 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:04:59,837 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:04:59,842 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:04:59" (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 20:04:59,931 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:04:59,932 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:04:59,932 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:04:59,932 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:04:59,932 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:04:59,933 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:04:59,933 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:04:59,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:04:59,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:04:59,934 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 20:05:00,127 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:05:00,127 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 20:05:00,128 INFO L202 PluginConnector]: Adding new model nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:05:00 BoogieIcfgContainer [2021-07-13 20:05:00,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:05:00,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:05:00,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:05:00,132 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:05:00,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:04:59" (1/2) ... [2021-07-13 20:05:00,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@649ce733 and model type nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:05:00, skipping insertion in model container [2021-07-13 20:05:00,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:05:00" (2/2) ... [2021-07-13 20:05:00,134 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-cntr-alt.wvr.bpl [2021-07-13 20:05:00,144 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:05:00,145 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:05:00,146 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:05:00,146 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:05:00,210 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-13 20:05:00,250 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 20:05:00,263 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:05:00,264 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:05:00,264 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:05:00,264 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:05:00,264 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:05:00,264 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:05:00,264 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:05:00,264 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:05:00,271 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-07-13 20:05:00,293 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:00,295 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:00,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 20:05:00,300 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:00,300 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:00,301 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:00,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:00,304 INFO L82 PathProgramCache]: Analyzing trace with hash 754791855, now seen corresponding path program 1 times [2021-07-13 20:05:00,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:00,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448178058] [2021-07-13 20:05:00,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:00,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:00,430 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 20:05:00,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:00,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448178058] [2021-07-13 20:05:00,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448178058] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:05:00,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:05:00,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:05:00,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905988316] [2021-07-13 20:05:00,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:05:00,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:00,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:05:00,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:05:00,445 INFO L87 Difference]: Start difference. First operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:00,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:00,492 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2021-07-13 20:05:00,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:05:00,494 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 20:05:00,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:00,501 INFO L225 Difference]: With dead ends: 43 [2021-07-13 20:05:00,501 INFO L226 Difference]: Without dead ends: 43 [2021-07-13 20:05:00,502 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:05:00,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-07-13 20:05:00,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-07-13 20:05:00,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 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 20:05:00,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2021-07-13 20:05:00,533 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2021-07-13 20:05:00,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:00,533 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2021-07-13 20:05:00,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:00,533 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2021-07-13 20:05:00,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 20:05:00,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:00,536 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:00,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:05:00,536 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:00,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:00,542 INFO L82 PathProgramCache]: Analyzing trace with hash 759896365, now seen corresponding path program 1 times [2021-07-13 20:05:00,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:00,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687081925] [2021-07-13 20:05:00,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:00,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:05:00,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:00,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687081925] [2021-07-13 20:05:00,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687081925] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:05:00,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:05:00,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:05:00,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359173876] [2021-07-13 20:05:00,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:05:00,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:00,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:05:00,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:05:00,588 INFO L87 Difference]: Start difference. First operand 38 states and 67 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:00,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:00,615 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2021-07-13 20:05:00,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:05:00,616 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 20:05:00,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:00,617 INFO L225 Difference]: With dead ends: 50 [2021-07-13 20:05:00,617 INFO L226 Difference]: Without dead ends: 50 [2021-07-13 20:05:00,617 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:05:00,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-07-13 20:05:00,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-07-13 20:05:00,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:00,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2021-07-13 20:05:00,627 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2021-07-13 20:05:00,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:00,628 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2021-07-13 20:05:00,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:00,628 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2021-07-13 20:05:00,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 20:05:00,629 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:00,629 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 20:05:00,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 20:05:00,630 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:00,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:00,632 INFO L82 PathProgramCache]: Analyzing trace with hash -806719381, now seen corresponding path program 1 times [2021-07-13 20:05:00,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:00,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730095184] [2021-07-13 20:05:00,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:00,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:00,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:00,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:00,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730095184] [2021-07-13 20:05:00,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730095184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:00,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259867671] [2021-07-13 20:05:00,907 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 20:05:00,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:00,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:05:00,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:01,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:01,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259867671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:01,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:01,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:05:01,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948486517] [2021-07-13 20:05:01,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:05:01,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:01,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:05:01,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:05:01,233 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:01,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:01,431 INFO L93 Difference]: Finished difference Result 108 states and 201 transitions. [2021-07-13 20:05:01,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:05:01,431 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 20:05:01,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:01,432 INFO L225 Difference]: With dead ends: 108 [2021-07-13 20:05:01,432 INFO L226 Difference]: Without dead ends: 77 [2021-07-13 20:05:01,432 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 290.6ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:05:01,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-07-13 20:05:01,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2021-07-13 20:05:01,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.8867924528301887) internal successors, (100), 53 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:01,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 100 transitions. [2021-07-13 20:05:01,437 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 100 transitions. Word has length 19 [2021-07-13 20:05:01,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:01,437 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 100 transitions. [2021-07-13 20:05:01,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:01,437 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 100 transitions. [2021-07-13 20:05:01,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 20:05:01,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:01,438 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 20:05:01,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-13 20:05:01,639 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:01,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:01,639 INFO L82 PathProgramCache]: Analyzing trace with hash 242654451, now seen corresponding path program 2 times [2021-07-13 20:05:01,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:01,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86693812] [2021-07-13 20:05:01,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:01,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:01,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:01,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86693812] [2021-07-13 20:05:01,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86693812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:01,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143597114] [2021-07-13 20:05:01,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:01,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:05:01,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:01,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:05:01,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:02,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:02,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143597114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:02,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:02,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:05:02,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290572110] [2021-07-13 20:05:02,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:05:02,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:02,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:05:02,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:05:02,103 INFO L87 Difference]: Start difference. First operand 54 states and 100 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:02,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:02,399 INFO L93 Difference]: Finished difference Result 130 states and 236 transitions. [2021-07-13 20:05:02,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:05:02,400 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 20:05:02,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:02,401 INFO L225 Difference]: With dead ends: 130 [2021-07-13 20:05:02,401 INFO L226 Difference]: Without dead ends: 117 [2021-07-13 20:05:02,401 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 370.4ms TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:05:02,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-07-13 20:05:02,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 57. [2021-07-13 20:05:02,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.9285714285714286) internal successors, (108), 56 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:02,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 108 transitions. [2021-07-13 20:05:02,406 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 108 transitions. Word has length 19 [2021-07-13 20:05:02,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:02,406 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 108 transitions. [2021-07-13 20:05:02,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:02,406 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 108 transitions. [2021-07-13 20:05:02,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 20:05:02,407 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:02,407 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 20:05:02,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:02,621 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:02,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:02,621 INFO L82 PathProgramCache]: Analyzing trace with hash 892723421, now seen corresponding path program 3 times [2021-07-13 20:05:02,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:02,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496587879] [2021-07-13 20:05:02,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:02,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:02,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:02,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:02,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496587879] [2021-07-13 20:05:02,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496587879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:02,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332762280] [2021-07-13 20:05:02,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:05:02,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:05:02,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:02,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:05:02,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:02,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:02,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332762280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:02,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:02,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:05:02,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081015677] [2021-07-13 20:05:02,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:05:02,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:02,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:05:02,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:05:02,981 INFO L87 Difference]: Start difference. First operand 57 states and 108 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:03,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:03,153 INFO L93 Difference]: Finished difference Result 90 states and 168 transitions. [2021-07-13 20:05:03,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:05:03,153 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 20:05:03,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:03,155 INFO L225 Difference]: With dead ends: 90 [2021-07-13 20:05:03,155 INFO L226 Difference]: Without dead ends: 83 [2021-07-13 20:05:03,155 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 253.8ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:05:03,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-07-13 20:05:03,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 55. [2021-07-13 20:05:03,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:03,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 103 transitions. [2021-07-13 20:05:03,167 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 103 transitions. Word has length 19 [2021-07-13 20:05:03,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:03,168 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 103 transitions. [2021-07-13 20:05:03,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:03,169 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 103 transitions. [2021-07-13 20:05:03,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:05:03,173 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:03,173 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:03,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:03,390 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:03,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:03,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1736336617, now seen corresponding path program 4 times [2021-07-13 20:05:03,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:03,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926925106] [2021-07-13 20:05:03,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:03,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:03,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:03,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:03,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926925106] [2021-07-13 20:05:03,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926925106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:03,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815445301] [2021-07-13 20:05:03,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:05:03,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:05:03,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:03,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:05:03,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:03,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815445301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:03,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:03,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:05:03,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83787040] [2021-07-13 20:05:03,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:05:03,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:03,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:05:03,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:05:03,888 INFO L87 Difference]: Start difference. First operand 55 states and 103 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:04,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:04,234 INFO L93 Difference]: Finished difference Result 117 states and 220 transitions. [2021-07-13 20:05:04,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:05:04,234 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:05:04,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:04,235 INFO L225 Difference]: With dead ends: 117 [2021-07-13 20:05:04,235 INFO L226 Difference]: Without dead ends: 103 [2021-07-13 20:05:04,235 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 499.7ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:05:04,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-07-13 20:05:04,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 72. [2021-07-13 20:05:04,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.943661971830986) internal successors, (138), 71 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:04,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 138 transitions. [2021-07-13 20:05:04,239 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 138 transitions. Word has length 21 [2021-07-13 20:05:04,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:04,239 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 138 transitions. [2021-07-13 20:05:04,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:04,239 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 138 transitions. [2021-07-13 20:05:04,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:05:04,239 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:04,240 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:04,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:04,445 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:04,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:04,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1509256847, now seen corresponding path program 5 times [2021-07-13 20:05:04,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:04,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176996563] [2021-07-13 20:05:04,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:04,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:04,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:04,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176996563] [2021-07-13 20:05:04,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176996563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:04,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824530437] [2021-07-13 20:05:04,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:04,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:05:04,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:04,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:05:04,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:04,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:04,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824530437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:04,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:04,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:05:04,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368986869] [2021-07-13 20:05:04,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:05:04,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:04,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:05:04,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:05:04,829 INFO L87 Difference]: Start difference. First operand 72 states and 138 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:05,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:05,163 INFO L93 Difference]: Finished difference Result 133 states and 248 transitions. [2021-07-13 20:05:05,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:05:05,164 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:05:05,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:05,165 INFO L225 Difference]: With dead ends: 133 [2021-07-13 20:05:05,165 INFO L226 Difference]: Without dead ends: 126 [2021-07-13 20:05:05,166 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 397.9ms TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:05:05,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-07-13 20:05:05,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 73. [2021-07-13 20:05:05,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9722222222222223) internal successors, (142), 72 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:05,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 142 transitions. [2021-07-13 20:05:05,177 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 142 transitions. Word has length 21 [2021-07-13 20:05:05,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:05,177 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 142 transitions. [2021-07-13 20:05:05,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:05,178 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 142 transitions. [2021-07-13 20:05:05,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:05:05,179 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:05,180 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:05,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-07-13 20:05:05,393 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:05,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:05,393 INFO L82 PathProgramCache]: Analyzing trace with hash -859187877, now seen corresponding path program 6 times [2021-07-13 20:05:05,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:05,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836398544] [2021-07-13 20:05:05,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:05,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:05,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:05,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:05,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836398544] [2021-07-13 20:05:05,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836398544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:05,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930732298] [2021-07-13 20:05:05,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:05,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:05:05,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:05,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:05:05,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:05,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:05,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930732298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:05,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:05,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:05:05,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901674826] [2021-07-13 20:05:05,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:05:05,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:05,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:05:05,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:05:05,830 INFO L87 Difference]: Start difference. First operand 73 states and 142 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:06,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:06,229 INFO L93 Difference]: Finished difference Result 113 states and 215 transitions. [2021-07-13 20:05:06,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:05:06,229 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:05:06,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:06,231 INFO L225 Difference]: With dead ends: 113 [2021-07-13 20:05:06,231 INFO L226 Difference]: Without dead ends: 106 [2021-07-13 20:05:06,232 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 465.5ms TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:05:06,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-07-13 20:05:06,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2021-07-13 20:05:06,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.943661971830986) internal successors, (138), 71 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:06,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 138 transitions. [2021-07-13 20:05:06,239 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 138 transitions. Word has length 21 [2021-07-13 20:05:06,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:06,239 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 138 transitions. [2021-07-13 20:05:06,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:06,240 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 138 transitions. [2021-07-13 20:05:06,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:05:06,240 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:06,240 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:06,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:06,445 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:06,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:06,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1888068795, now seen corresponding path program 7 times [2021-07-13 20:05:06,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:06,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123267274] [2021-07-13 20:05:06,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:06,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:06,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:06,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123267274] [2021-07-13 20:05:06,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123267274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:06,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347061633] [2021-07-13 20:05:06,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:06,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:06,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:05:06,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:06,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:06,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347061633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:06,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:06,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:05:06,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435354148] [2021-07-13 20:05:06,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:05:06,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:06,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:05:06,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:05:06,808 INFO L87 Difference]: Start difference. First operand 72 states and 138 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:07,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:07,116 INFO L93 Difference]: Finished difference Result 176 states and 320 transitions. [2021-07-13 20:05:07,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:05:07,116 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:05:07,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:07,117 INFO L225 Difference]: With dead ends: 176 [2021-07-13 20:05:07,117 INFO L226 Difference]: Without dead ends: 162 [2021-07-13 20:05:07,118 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 348.4ms TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:05:07,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-07-13 20:05:07,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 72. [2021-07-13 20:05:07,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0) internal successors, (142), 71 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:07,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 142 transitions. [2021-07-13 20:05:07,120 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 142 transitions. Word has length 21 [2021-07-13 20:05:07,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:07,120 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 142 transitions. [2021-07-13 20:05:07,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:07,120 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 142 transitions. [2021-07-13 20:05:07,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:05:07,121 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:07,121 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:07,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:07,329 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:07,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:07,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1756829531, now seen corresponding path program 8 times [2021-07-13 20:05:07,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:07,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661466869] [2021-07-13 20:05:07,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:07,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:07,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:07,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:07,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661466869] [2021-07-13 20:05:07,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661466869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:07,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9656533] [2021-07-13 20:05:07,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:05:07,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:05:07,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:07,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:05:07,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:07,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:07,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9656533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:07,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:07,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:05:07,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425860394] [2021-07-13 20:05:07,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:05:07,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:07,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:05:07,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:05:07,719 INFO L87 Difference]: Start difference. First operand 72 states and 142 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:08,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:08,076 INFO L93 Difference]: Finished difference Result 163 states and 289 transitions. [2021-07-13 20:05:08,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:05:08,076 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:05:08,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:08,077 INFO L225 Difference]: With dead ends: 163 [2021-07-13 20:05:08,077 INFO L226 Difference]: Without dead ends: 149 [2021-07-13 20:05:08,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 380.2ms TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:05:08,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-07-13 20:05:08,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 71. [2021-07-13 20:05:08,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.9714285714285715) internal successors, (138), 70 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:08,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 138 transitions. [2021-07-13 20:05:08,080 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 138 transitions. Word has length 21 [2021-07-13 20:05:08,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:08,080 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 138 transitions. [2021-07-13 20:05:08,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:08,080 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 138 transitions. [2021-07-13 20:05:08,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:05:08,080 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:08,081 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:08,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-13 20:05:08,289 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:08,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:08,290 INFO L82 PathProgramCache]: Analyzing trace with hash 477277963, now seen corresponding path program 9 times [2021-07-13 20:05:08,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:08,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465904761] [2021-07-13 20:05:08,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:08,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:08,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:08,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465904761] [2021-07-13 20:05:08,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465904761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:08,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890405907] [2021-07-13 20:05:08,392 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 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 20:05:08,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:05:08,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:08,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:05:08,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:08,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:08,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890405907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:08,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:08,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:05:08,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338742035] [2021-07-13 20:05:08,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:05:08,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:08,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:05:08,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:05:08,625 INFO L87 Difference]: Start difference. First operand 71 states and 138 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:08,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:08,893 INFO L93 Difference]: Finished difference Result 104 states and 188 transitions. [2021-07-13 20:05:08,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:05:08,894 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:05:08,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:08,894 INFO L225 Difference]: With dead ends: 104 [2021-07-13 20:05:08,894 INFO L226 Difference]: Without dead ends: 90 [2021-07-13 20:05:08,895 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 311.1ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:05:08,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-07-13 20:05:08,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 73. [2021-07-13 20:05:08,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 72 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:08,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 141 transitions. [2021-07-13 20:05:08,897 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 141 transitions. Word has length 21 [2021-07-13 20:05:08,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:08,897 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 141 transitions. [2021-07-13 20:05:08,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:08,897 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 141 transitions. [2021-07-13 20:05:08,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:05:08,897 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:08,897 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:09,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:09,113 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:09,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:09,113 INFO L82 PathProgramCache]: Analyzing trace with hash -362797707, now seen corresponding path program 10 times [2021-07-13 20:05:09,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:09,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872091230] [2021-07-13 20:05:09,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:09,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:09,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:09,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872091230] [2021-07-13 20:05:09,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872091230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:09,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420175836] [2021-07-13 20:05:09,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:05:09,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:05:09,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:09,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:05:09,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:09,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:09,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420175836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:09,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:09,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:05:09,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50035364] [2021-07-13 20:05:09,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:05:09,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:09,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:05:09,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:05:09,448 INFO L87 Difference]: Start difference. First operand 73 states and 141 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:09,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:09,969 INFO L93 Difference]: Finished difference Result 171 states and 307 transitions. [2021-07-13 20:05:09,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:05:09,970 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:05:09,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:09,971 INFO L225 Difference]: With dead ends: 171 [2021-07-13 20:05:09,971 INFO L226 Difference]: Without dead ends: 157 [2021-07-13 20:05:09,971 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 517.0ms TimeCoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:05:09,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-07-13 20:05:09,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 77. [2021-07-13 20:05:09,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.013157894736842) internal successors, (153), 76 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:09,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 153 transitions. [2021-07-13 20:05:09,974 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 153 transitions. Word has length 21 [2021-07-13 20:05:09,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:09,974 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 153 transitions. [2021-07-13 20:05:09,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:09,974 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 153 transitions. [2021-07-13 20:05:09,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:05:09,974 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:09,974 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:10,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:10,184 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:10,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:10,184 INFO L82 PathProgramCache]: Analyzing trace with hash 287271263, now seen corresponding path program 11 times [2021-07-13 20:05:10,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:10,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045440116] [2021-07-13 20:05:10,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:10,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:10,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:10,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:10,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045440116] [2021-07-13 20:05:10,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045440116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:10,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465958212] [2021-07-13 20:05:10,304 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 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 20:05:10,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:05:10,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:10,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:05:10,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:10,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465958212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:10,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:10,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:05:10,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931833300] [2021-07-13 20:05:10,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:05:10,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:10,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:05:10,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:05:10,505 INFO L87 Difference]: Start difference. First operand 77 states and 153 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:11,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:11,030 INFO L93 Difference]: Finished difference Result 171 states and 303 transitions. [2021-07-13 20:05:11,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:05:11,031 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:05:11,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:11,031 INFO L225 Difference]: With dead ends: 171 [2021-07-13 20:05:11,031 INFO L226 Difference]: Without dead ends: 157 [2021-07-13 20:05:11,032 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 574.6ms TimeCoverageRelationStatistics Valid=253, Invalid=1229, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:05:11,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-07-13 20:05:11,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 76. [2021-07-13 20:05:11,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 75 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:11,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 149 transitions. [2021-07-13 20:05:11,034 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 149 transitions. Word has length 21 [2021-07-13 20:05:11,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:11,034 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 149 transitions. [2021-07-13 20:05:11,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:11,035 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 149 transitions. [2021-07-13 20:05:11,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:05:11,035 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:11,035 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:11,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-13 20:05:11,252 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:11,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:11,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1773588539, now seen corresponding path program 12 times [2021-07-13 20:05:11,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:11,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426782994] [2021-07-13 20:05:11,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:11,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:11,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:11,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:11,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426782994] [2021-07-13 20:05:11,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426782994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:11,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931831459] [2021-07-13 20:05:11,370 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 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 20:05:11,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:05:11,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:11,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:05:11,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:11,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:11,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931831459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:11,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:11,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:05:11,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503864323] [2021-07-13 20:05:11,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:05:11,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:11,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:05:11,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:05:11,607 INFO L87 Difference]: Start difference. First operand 76 states and 149 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:12,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:12,004 INFO L93 Difference]: Finished difference Result 139 states and 248 transitions. [2021-07-13 20:05:12,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:05:12,004 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:05:12,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:12,005 INFO L225 Difference]: With dead ends: 139 [2021-07-13 20:05:12,005 INFO L226 Difference]: Without dead ends: 125 [2021-07-13 20:05:12,006 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 434.5ms TimeCoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:05:12,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-07-13 20:05:12,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 73. [2021-07-13 20:05:12,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 72 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:12,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 141 transitions. [2021-07-13 20:05:12,008 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 141 transitions. Word has length 21 [2021-07-13 20:05:12,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:12,008 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 141 transitions. [2021-07-13 20:05:12,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:12,008 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 141 transitions. [2021-07-13 20:05:12,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:05:12,009 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:12,009 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:12,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-13 20:05:12,209 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:12,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:12,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1986148955, now seen corresponding path program 13 times [2021-07-13 20:05:12,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:12,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824265543] [2021-07-13 20:05:12,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:12,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:12,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:12,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:12,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824265543] [2021-07-13 20:05:12,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824265543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:12,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516190344] [2021-07-13 20:05:12,296 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 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 20:05:12,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:12,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:05:12,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:12,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:12,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516190344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:12,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:12,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:05:12,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617074828] [2021-07-13 20:05:12,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:05:12,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:12,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:05:12,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:05:12,548 INFO L87 Difference]: Start difference. First operand 73 states and 141 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:12,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:12,823 INFO L93 Difference]: Finished difference Result 124 states and 220 transitions. [2021-07-13 20:05:12,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:05:12,823 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:05:12,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:12,824 INFO L225 Difference]: With dead ends: 124 [2021-07-13 20:05:12,824 INFO L226 Difference]: Without dead ends: 92 [2021-07-13 20:05:12,824 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 364.2ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:05:12,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-13 20:05:12,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2021-07-13 20:05:12,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9264705882352942) internal successors, (131), 68 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:12,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 131 transitions. [2021-07-13 20:05:12,826 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 131 transitions. Word has length 21 [2021-07-13 20:05:12,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:12,826 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 131 transitions. [2021-07-13 20:05:12,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:12,826 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 131 transitions. [2021-07-13 20:05:12,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:12,827 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:12,827 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:13,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 20:05:13,041 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:13,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:13,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1776759271, now seen corresponding path program 14 times [2021-07-13 20:05:13,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:13,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066758212] [2021-07-13 20:05:13,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:13,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:13,187 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:13,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:13,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066758212] [2021-07-13 20:05:13,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066758212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:13,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7849416] [2021-07-13 20:05:13,188 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 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 20:05:13,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:05:13,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:13,212 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:05:13,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:13,443 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:13,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7849416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:13,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:13,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:05:13,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869813317] [2021-07-13 20:05:13,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:05:13,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:13,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:05:13,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:05:13,453 INFO L87 Difference]: Start difference. First operand 69 states and 131 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 20:05:13,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:13,791 INFO L93 Difference]: Finished difference Result 120 states and 222 transitions. [2021-07-13 20:05:13,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:05:13,792 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-07-13 20:05:13,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:13,792 INFO L225 Difference]: With dead ends: 120 [2021-07-13 20:05:13,792 INFO L226 Difference]: Without dead ends: 106 [2021-07-13 20:05:13,793 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 444.8ms TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:05:13,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-07-13 20:05:13,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 64. [2021-07-13 20:05:13,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.8888888888888888) internal successors, (119), 63 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:13,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 119 transitions. [2021-07-13 20:05:13,795 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 119 transitions. Word has length 23 [2021-07-13 20:05:13,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:13,795 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 119 transitions. [2021-07-13 20:05:13,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 20:05:13,795 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 119 transitions. [2021-07-13 20:05:13,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:13,795 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:13,795 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:14,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:14,001 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:14,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:14,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1249492263, now seen corresponding path program 15 times [2021-07-13 20:05:14,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:14,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999507224] [2021-07-13 20:05:14,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:14,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:14,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:14,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:14,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999507224] [2021-07-13 20:05:14,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999507224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:14,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891501005] [2021-07-13 20:05:14,133 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 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 20:05:14,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:05:14,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:14,154 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:05:14,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:14,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:14,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891501005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:14,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:14,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:05:14,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208469159] [2021-07-13 20:05:14,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:05:14,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:14,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:05:14,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:05:14,392 INFO L87 Difference]: Start difference. First operand 64 states and 119 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 20:05:15,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:15,336 INFO L93 Difference]: Finished difference Result 225 states and 407 transitions. [2021-07-13 20:05:15,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:05:15,336 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-07-13 20:05:15,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:15,337 INFO L225 Difference]: With dead ends: 225 [2021-07-13 20:05:15,337 INFO L226 Difference]: Without dead ends: 175 [2021-07-13 20:05:15,338 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 963.3ms TimeCoverageRelationStatistics Valid=425, Invalid=2655, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:05:15,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-07-13 20:05:15,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 92. [2021-07-13 20:05:15,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.032967032967033) internal successors, (185), 91 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:15,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 185 transitions. [2021-07-13 20:05:15,340 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 185 transitions. Word has length 23 [2021-07-13 20:05:15,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:15,340 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 185 transitions. [2021-07-13 20:05:15,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 20:05:15,340 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 185 transitions. [2021-07-13 20:05:15,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:15,341 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:15,341 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:15,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 20:05:15,557 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:15,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:15,557 INFO L82 PathProgramCache]: Analyzing trace with hash 380430255, now seen corresponding path program 16 times [2021-07-13 20:05:15,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:15,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003269635] [2021-07-13 20:05:15,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:15,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:15,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:15,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:15,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003269635] [2021-07-13 20:05:15,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003269635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:15,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886524103] [2021-07-13 20:05:15,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:05:15,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:05:15,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:15,802 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:05:15,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:16,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:16,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886524103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:16,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:16,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:05:16,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149880632] [2021-07-13 20:05:16,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:05:16,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:16,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:05:16,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:05:16,004 INFO L87 Difference]: Start difference. First operand 92 states and 185 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 20:05:17,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:17,360 INFO L93 Difference]: Finished difference Result 293 states and 527 transitions. [2021-07-13 20:05:17,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:05:17,360 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-07-13 20:05:17,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:17,362 INFO L225 Difference]: With dead ends: 293 [2021-07-13 20:05:17,362 INFO L226 Difference]: Without dead ends: 254 [2021-07-13 20:05:17,362 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1321.5ms TimeCoverageRelationStatistics Valid=557, Invalid=3225, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:05:17,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-07-13 20:05:17,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 107. [2021-07-13 20:05:17,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:17,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-07-13 20:05:17,365 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 23 [2021-07-13 20:05:17,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:17,366 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-07-13 20:05:17,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 20:05:17,366 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-07-13 20:05:17,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:17,366 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:17,366 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:17,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 20:05:17,574 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:17,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:17,574 INFO L82 PathProgramCache]: Analyzing trace with hash -884497605, now seen corresponding path program 17 times [2021-07-13 20:05:17,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:17,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993162024] [2021-07-13 20:05:17,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:17,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:17,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:17,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993162024] [2021-07-13 20:05:17,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993162024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:17,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044656935] [2021-07-13 20:05:17,785 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 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 20:05:17,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:05:17,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:17,806 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:05:17,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:18,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:18,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044656935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:18,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:18,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:05:18,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025878955] [2021-07-13 20:05:18,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:05:18,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:18,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:05:18,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:05:18,020 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 20:05:19,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:19,226 INFO L93 Difference]: Finished difference Result 263 states and 468 transitions. [2021-07-13 20:05:19,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:05:19,226 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-07-13 20:05:19,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:19,227 INFO L225 Difference]: With dead ends: 263 [2021-07-13 20:05:19,227 INFO L226 Difference]: Without dead ends: 236 [2021-07-13 20:05:19,228 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1181.8ms TimeCoverageRelationStatistics Valid=512, Invalid=2794, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:05:19,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-07-13 20:05:19,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 109. [2021-07-13 20:05:19,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0925925925925926) internal successors, (226), 108 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:19,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 226 transitions. [2021-07-13 20:05:19,231 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 226 transitions. Word has length 23 [2021-07-13 20:05:19,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:19,231 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 226 transitions. [2021-07-13 20:05:19,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 20:05:19,231 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 226 transitions. [2021-07-13 20:05:19,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:19,232 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:19,232 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:19,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:19,432 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:19,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:19,433 INFO L82 PathProgramCache]: Analyzing trace with hash 251687667, now seen corresponding path program 18 times [2021-07-13 20:05:19,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:19,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342745176] [2021-07-13 20:05:19,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:19,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:19,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:19,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:19,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342745176] [2021-07-13 20:05:19,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342745176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:19,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988969151] [2021-07-13 20:05:19,571 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 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 20:05:19,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:05:19,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:19,598 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:05:19,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:19,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:19,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988969151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:19,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:19,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:05:19,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71692576] [2021-07-13 20:05:19,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:05:19,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:19,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:05:19,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:05:19,813 INFO L87 Difference]: Start difference. First operand 109 states and 226 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 20:05:20,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:20,966 INFO L93 Difference]: Finished difference Result 280 states and 496 transitions. [2021-07-13 20:05:20,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:05:20,967 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-07-13 20:05:20,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:20,968 INFO L225 Difference]: With dead ends: 280 [2021-07-13 20:05:20,968 INFO L226 Difference]: Without dead ends: 256 [2021-07-13 20:05:20,968 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 1039.8ms TimeCoverageRelationStatistics Valid=546, Invalid=2876, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:05:20,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-07-13 20:05:20,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 108. [2021-07-13 20:05:20,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.130841121495327) internal successors, (228), 107 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:20,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 228 transitions. [2021-07-13 20:05:20,971 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 228 transitions. Word has length 23 [2021-07-13 20:05:20,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:20,971 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 228 transitions. [2021-07-13 20:05:20,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 20:05:20,971 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 228 transitions. [2021-07-13 20:05:20,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:20,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:20,972 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:21,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:21,188 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:21,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:21,189 INFO L82 PathProgramCache]: Analyzing trace with hash 901756637, now seen corresponding path program 19 times [2021-07-13 20:05:21,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:21,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686754933] [2021-07-13 20:05:21,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:21,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:21,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:21,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:21,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686754933] [2021-07-13 20:05:21,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686754933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:21,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922432103] [2021-07-13 20:05:21,322 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 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 20:05:21,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:21,343 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:05:21,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:21,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922432103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:21,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:21,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:05:21,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070756453] [2021-07-13 20:05:21,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:05:21,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:21,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:05:21,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:05:21,544 INFO L87 Difference]: Start difference. First operand 108 states and 228 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 20:05:22,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:22,632 INFO L93 Difference]: Finished difference Result 241 states and 458 transitions. [2021-07-13 20:05:22,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:05:22,632 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-07-13 20:05:22,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:22,633 INFO L225 Difference]: With dead ends: 241 [2021-07-13 20:05:22,633 INFO L226 Difference]: Without dead ends: 220 [2021-07-13 20:05:22,634 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 1027.8ms TimeCoverageRelationStatistics Valid=539, Invalid=2767, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:05:22,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-07-13 20:05:22,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 122. [2021-07-13 20:05:22,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.190082644628099) internal successors, (265), 121 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:22,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 265 transitions. [2021-07-13 20:05:22,638 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 265 transitions. Word has length 23 [2021-07-13 20:05:22,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:22,638 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 265 transitions. [2021-07-13 20:05:22,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 20:05:22,639 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 265 transitions. [2021-07-13 20:05:22,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:22,640 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:22,640 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:22,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:22,853 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:22,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:22,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1035227257, now seen corresponding path program 20 times [2021-07-13 20:05:22,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:22,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587671552] [2021-07-13 20:05:22,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:22,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:23,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:23,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:23,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587671552] [2021-07-13 20:05:23,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587671552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:23,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092593310] [2021-07-13 20:05:23,003 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 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 20:05:23,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:05:23,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:23,027 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:05:23,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:23,248 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:23,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092593310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:23,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:23,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:05:23,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244872650] [2021-07-13 20:05:23,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:05:23,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:23,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:05:23,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:05:23,250 INFO L87 Difference]: Start difference. First operand 122 states and 265 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 20:05:24,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:24,757 INFO L93 Difference]: Finished difference Result 342 states and 656 transitions. [2021-07-13 20:05:24,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:05:24,758 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-07-13 20:05:24,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:24,759 INFO L225 Difference]: With dead ends: 342 [2021-07-13 20:05:24,759 INFO L226 Difference]: Without dead ends: 300 [2021-07-13 20:05:24,760 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 1386.5ms TimeCoverageRelationStatistics Valid=562, Invalid=3220, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:05:24,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-07-13 20:05:24,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 150. [2021-07-13 20:05:24,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.248322147651007) internal successors, (335), 149 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:24,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 335 transitions. [2021-07-13 20:05:24,763 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 335 transitions. Word has length 23 [2021-07-13 20:05:24,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:24,764 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 335 transitions. [2021-07-13 20:05:24,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 20:05:24,764 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 335 transitions. [2021-07-13 20:05:24,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:24,764 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:24,764 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:24,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-13 20:05:24,993 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:24,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:24,994 INFO L82 PathProgramCache]: Analyzing trace with hash -229700603, now seen corresponding path program 21 times [2021-07-13 20:05:24,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:24,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367707714] [2021-07-13 20:05:24,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:24,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:25,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:25,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:25,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367707714] [2021-07-13 20:05:25,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367707714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:25,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718746547] [2021-07-13 20:05:25,158 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 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 20:05:25,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:05:25,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:25,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:05:25,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:25,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:25,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718746547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:25,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:25,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:05:25,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293128708] [2021-07-13 20:05:25,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:05:25,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:25,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:05:25,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:05:25,430 INFO L87 Difference]: Start difference. First operand 150 states and 335 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 20:05:26,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:26,827 INFO L93 Difference]: Finished difference Result 335 states and 651 transitions. [2021-07-13 20:05:26,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:05:26,828 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-07-13 20:05:26,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:26,829 INFO L225 Difference]: With dead ends: 335 [2021-07-13 20:05:26,829 INFO L226 Difference]: Without dead ends: 315 [2021-07-13 20:05:26,830 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 1334.0ms TimeCoverageRelationStatistics Valid=546, Invalid=2994, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:05:26,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-07-13 20:05:26,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 154. [2021-07-13 20:05:26,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.261437908496732) internal successors, (346), 153 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:26,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 346 transitions. [2021-07-13 20:05:26,833 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 346 transitions. Word has length 23 [2021-07-13 20:05:26,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:26,834 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 346 transitions. [2021-07-13 20:05:26,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 20:05:26,834 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 346 transitions. [2021-07-13 20:05:26,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:26,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:26,834 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:27,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 20:05:27,051 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:27,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:27,052 INFO L82 PathProgramCache]: Analyzing trace with hash 906484669, now seen corresponding path program 22 times [2021-07-13 20:05:27,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:27,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827995778] [2021-07-13 20:05:27,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:27,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:27,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:27,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827995778] [2021-07-13 20:05:27,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827995778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:27,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498683522] [2021-07-13 20:05:27,200 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 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 20:05:27,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:05:27,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:27,220 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:05:27,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:27,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498683522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:27,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:27,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:05:27,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133479561] [2021-07-13 20:05:27,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:05:27,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:27,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:05:27,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:05:27,455 INFO L87 Difference]: Start difference. First operand 154 states and 346 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 20:05:28,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:28,858 INFO L93 Difference]: Finished difference Result 324 states and 640 transitions. [2021-07-13 20:05:28,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:05:28,858 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-07-13 20:05:28,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:28,859 INFO L225 Difference]: With dead ends: 324 [2021-07-13 20:05:28,859 INFO L226 Difference]: Without dead ends: 307 [2021-07-13 20:05:28,860 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1361.3ms TimeCoverageRelationStatistics Valid=560, Invalid=2746, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:05:28,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-07-13 20:05:28,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 149. [2021-07-13 20:05:28,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.2635135135135136) internal successors, (335), 148 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:28,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 335 transitions. [2021-07-13 20:05:28,874 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 335 transitions. Word has length 23 [2021-07-13 20:05:28,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:28,874 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 335 transitions. [2021-07-13 20:05:28,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 20:05:28,874 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 335 transitions. [2021-07-13 20:05:28,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:28,875 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:28,875 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:29,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:29,091 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:29,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:29,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1644322069, now seen corresponding path program 23 times [2021-07-13 20:05:29,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:29,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589376307] [2021-07-13 20:05:29,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:29,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:29,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:29,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589376307] [2021-07-13 20:05:29,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589376307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:29,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713227229] [2021-07-13 20:05:29,242 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 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 20:05:29,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:05:29,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:29,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:05:29,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:29,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:29,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713227229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:29,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:29,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:05:29,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893513487] [2021-07-13 20:05:29,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:05:29,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:29,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:05:29,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:05:29,539 INFO L87 Difference]: Start difference. First operand 149 states and 335 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 20:05:30,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:30,847 INFO L93 Difference]: Finished difference Result 335 states and 686 transitions. [2021-07-13 20:05:30,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:05:30,848 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-07-13 20:05:30,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:30,849 INFO L225 Difference]: With dead ends: 335 [2021-07-13 20:05:30,849 INFO L226 Difference]: Without dead ends: 321 [2021-07-13 20:05:30,849 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 1233.4ms TimeCoverageRelationStatistics Valid=519, Invalid=2451, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:05:30,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-07-13 20:05:30,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 176. [2021-07-13 20:05:30,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.2914285714285714) internal successors, (401), 175 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:30,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 401 transitions. [2021-07-13 20:05:30,853 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 401 transitions. Word has length 23 [2021-07-13 20:05:30,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:30,853 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 401 transitions. [2021-07-13 20:05:30,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 20:05:30,853 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 401 transitions. [2021-07-13 20:05:30,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:05:30,854 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:30,854 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:31,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 20:05:31,054 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:31,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:31,055 INFO L82 PathProgramCache]: Analyzing trace with hash -949311587, now seen corresponding path program 24 times [2021-07-13 20:05:31,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:31,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215687662] [2021-07-13 20:05:31,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:31,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:31,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:31,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215687662] [2021-07-13 20:05:31,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215687662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:31,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712313438] [2021-07-13 20:05:31,196 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 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 20:05:31,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:05:31,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:31,219 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:05:31,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:31,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:31,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712313438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:31,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:31,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:05:31,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058866099] [2021-07-13 20:05:31,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:05:31,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:31,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:05:31,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:05:31,453 INFO L87 Difference]: Start difference. First operand 176 states and 401 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 20:05:32,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:32,556 INFO L93 Difference]: Finished difference Result 418 states and 882 transitions. [2021-07-13 20:05:32,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:05:32,557 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-07-13 20:05:32,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:32,558 INFO L225 Difference]: With dead ends: 418 [2021-07-13 20:05:32,558 INFO L226 Difference]: Without dead ends: 404 [2021-07-13 20:05:32,559 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1062.0ms TimeCoverageRelationStatistics Valid=498, Invalid=2258, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:05:32,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-07-13 20:05:32,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 193. [2021-07-13 20:05:32,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.3541666666666665) internal successors, (452), 192 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:32,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 452 transitions. [2021-07-13 20:05:32,562 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 452 transitions. Word has length 23 [2021-07-13 20:05:32,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:32,563 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 452 transitions. [2021-07-13 20:05:32,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 20:05:32,563 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 452 transitions. [2021-07-13 20:05:32,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:05:32,563 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:32,563 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:32,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:32,780 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:32,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:32,781 INFO L82 PathProgramCache]: Analyzing trace with hash 45870327, now seen corresponding path program 25 times [2021-07-13 20:05:32,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:32,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218540676] [2021-07-13 20:05:32,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:32,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:32,900 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:32,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:32,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218540676] [2021-07-13 20:05:32,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218540676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:32,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415064985] [2021-07-13 20:05:32,900 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 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 20:05:32,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:32,923 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:05:32,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:33,176 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:33,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415064985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:33,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:33,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:05:33,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253436292] [2021-07-13 20:05:33,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:05:33,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:33,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:05:33,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:05:33,178 INFO L87 Difference]: Start difference. First operand 193 states and 452 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:34,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:34,088 INFO L93 Difference]: Finished difference Result 441 states and 930 transitions. [2021-07-13 20:05:34,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:05:34,089 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:05:34,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:34,090 INFO L225 Difference]: With dead ends: 441 [2021-07-13 20:05:34,090 INFO L226 Difference]: Without dead ends: 420 [2021-07-13 20:05:34,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 795.3ms TimeCoverageRelationStatistics Valid=399, Invalid=2253, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:05:34,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-07-13 20:05:34,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 228. [2021-07-13 20:05:34,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.409691629955947) internal successors, (547), 227 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:34,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 547 transitions. [2021-07-13 20:05:34,101 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 547 transitions. Word has length 25 [2021-07-13 20:05:34,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:34,101 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 547 transitions. [2021-07-13 20:05:34,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:34,101 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 547 transitions. [2021-07-13 20:05:34,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:05:34,102 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:34,102 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:34,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-13 20:05:34,318 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:34,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:34,318 INFO L82 PathProgramCache]: Analyzing trace with hash 695939297, now seen corresponding path program 26 times [2021-07-13 20:05:34,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:34,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895712219] [2021-07-13 20:05:34,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:34,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:34,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:34,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895712219] [2021-07-13 20:05:34,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895712219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:34,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23226088] [2021-07-13 20:05:34,440 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 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 20:05:34,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:05:34,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:34,462 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:05:34,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:34,702 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:34,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23226088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:34,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:34,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:05:34,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56005809] [2021-07-13 20:05:34,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:05:34,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:34,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:05:34,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:05:34,703 INFO L87 Difference]: Start difference. First operand 228 states and 547 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:35,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:35,652 INFO L93 Difference]: Finished difference Result 450 states and 937 transitions. [2021-07-13 20:05:35,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:05:35,652 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:05:35,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:35,653 INFO L225 Difference]: With dead ends: 450 [2021-07-13 20:05:35,653 INFO L226 Difference]: Without dead ends: 429 [2021-07-13 20:05:35,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 925.7ms TimeCoverageRelationStatistics Valid=486, Invalid=2820, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:05:35,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-07-13 20:05:35,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 228. [2021-07-13 20:05:35,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.409691629955947) internal successors, (547), 227 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:35,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 547 transitions. [2021-07-13 20:05:35,659 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 547 transitions. Word has length 25 [2021-07-13 20:05:35,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:35,659 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 547 transitions. [2021-07-13 20:05:35,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:35,659 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 547 transitions. [2021-07-13 20:05:35,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:05:35,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:35,660 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:35,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:35,877 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:35,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:35,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1364920505, now seen corresponding path program 27 times [2021-07-13 20:05:35,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:35,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141108977] [2021-07-13 20:05:35,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:35,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:35,985 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:35,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:35,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141108977] [2021-07-13 20:05:35,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141108977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:35,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834754795] [2021-07-13 20:05:35,986 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:05:36,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:05:36,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:36,015 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:05:36,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:36,275 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:36,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834754795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:36,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:36,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:05:36,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58614862] [2021-07-13 20:05:36,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:05:36,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:36,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:05:36,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:05:36,276 INFO L87 Difference]: Start difference. First operand 228 states and 547 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:37,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:37,071 INFO L93 Difference]: Finished difference Result 320 states and 692 transitions. [2021-07-13 20:05:37,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:05:37,071 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:05:37,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:37,072 INFO L225 Difference]: With dead ends: 320 [2021-07-13 20:05:37,073 INFO L226 Difference]: Without dead ends: 299 [2021-07-13 20:05:37,073 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 782.8ms TimeCoverageRelationStatistics Valid=334, Invalid=2116, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:05:37,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-07-13 20:05:37,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 230. [2021-07-13 20:05:37,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.4017467248908297) internal successors, (550), 229 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:37,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 550 transitions. [2021-07-13 20:05:37,078 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 550 transitions. Word has length 25 [2021-07-13 20:05:37,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:37,078 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 550 transitions. [2021-07-13 20:05:37,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:37,078 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 550 transitions. [2021-07-13 20:05:37,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:05:37,078 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:37,078 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:37,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-13 20:05:37,293 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:37,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:37,293 INFO L82 PathProgramCache]: Analyzing trace with hash 740880809, now seen corresponding path program 28 times [2021-07-13 20:05:37,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:37,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965149866] [2021-07-13 20:05:37,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:37,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:37,392 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:37,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:37,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965149866] [2021-07-13 20:05:37,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965149866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:37,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669675368] [2021-07-13 20:05:37,392 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 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 20:05:37,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:05:37,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:37,415 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:05:37,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:37,644 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:37,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669675368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:37,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:37,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-13 20:05:37,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168289984] [2021-07-13 20:05:37,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:05:37,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:37,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:05:37,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:05:37,645 INFO L87 Difference]: Start difference. First operand 230 states and 550 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:38,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:38,874 INFO L93 Difference]: Finished difference Result 676 states and 1412 transitions. [2021-07-13 20:05:38,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:05:38,874 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:05:38,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:38,876 INFO L225 Difference]: With dead ends: 676 [2021-07-13 20:05:38,876 INFO L226 Difference]: Without dead ends: 635 [2021-07-13 20:05:38,877 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1229 ImplicationChecksByTransitivity, 1040.1ms TimeCoverageRelationStatistics Valid=575, Invalid=3585, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:05:38,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-07-13 20:05:38,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 344. [2021-07-13 20:05:38,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.498542274052478) internal successors, (857), 343 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:38,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 857 transitions. [2021-07-13 20:05:38,883 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 857 transitions. Word has length 25 [2021-07-13 20:05:38,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:38,883 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 857 transitions. [2021-07-13 20:05:38,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:38,883 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 857 transitions. [2021-07-13 20:05:38,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:05:38,884 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:38,884 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:39,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:39,097 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:39,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:39,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1390949779, now seen corresponding path program 29 times [2021-07-13 20:05:39,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:39,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963343083] [2021-07-13 20:05:39,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:39,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:39,206 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:39,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:39,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963343083] [2021-07-13 20:05:39,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963343083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:39,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833281157] [2021-07-13 20:05:39,206 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 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 20:05:39,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:05:39,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:39,228 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:05:39,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:39,475 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:39,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833281157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:39,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:39,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-13 20:05:39,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055049490] [2021-07-13 20:05:39,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:05:39,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:39,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:05:39,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:05:39,476 INFO L87 Difference]: Start difference. First operand 344 states and 857 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:40,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:40,755 INFO L93 Difference]: Finished difference Result 642 states and 1345 transitions. [2021-07-13 20:05:40,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:05:40,755 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:05:40,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:40,757 INFO L225 Difference]: With dead ends: 642 [2021-07-13 20:05:40,757 INFO L226 Difference]: Without dead ends: 607 [2021-07-13 20:05:40,758 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 1167.4ms TimeCoverageRelationStatistics Valid=619, Invalid=3937, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:05:40,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-07-13 20:05:40,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 305. [2021-07-13 20:05:40,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.4309210526315788) internal successors, (739), 304 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:40,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 739 transitions. [2021-07-13 20:05:40,764 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 739 transitions. Word has length 25 [2021-07-13 20:05:40,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:40,764 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 739 transitions. [2021-07-13 20:05:40,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:40,764 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 739 transitions. [2021-07-13 20:05:40,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:05:40,764 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:40,765 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:40,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-13 20:05:40,981 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:40,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:40,981 INFO L82 PathProgramCache]: Analyzing trace with hash -669910023, now seen corresponding path program 30 times [2021-07-13 20:05:40,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:40,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006115848] [2021-07-13 20:05:40,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:41,080 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:41,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:41,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006115848] [2021-07-13 20:05:41,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006115848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:41,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196158038] [2021-07-13 20:05:41,080 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 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 20:05:41,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:05:41,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:41,128 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:05:41,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:41,384 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:41,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196158038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:41,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:41,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-13 20:05:41,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818209936] [2021-07-13 20:05:41,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:05:41,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:41,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:05:41,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:05:41,386 INFO L87 Difference]: Start difference. First operand 305 states and 739 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:42,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:42,254 INFO L93 Difference]: Finished difference Result 433 states and 956 transitions. [2021-07-13 20:05:42,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:05:42,255 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:05:42,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:42,256 INFO L225 Difference]: With dead ends: 433 [2021-07-13 20:05:42,256 INFO L226 Difference]: Without dead ends: 412 [2021-07-13 20:05:42,256 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 771.4ms TimeCoverageRelationStatistics Valid=319, Invalid=2131, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:05:42,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-07-13 20:05:42,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 296. [2021-07-13 20:05:42,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.4372881355932203) internal successors, (719), 295 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:42,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 719 transitions. [2021-07-13 20:05:42,261 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 719 transitions. Word has length 25 [2021-07-13 20:05:42,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:42,261 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 719 transitions. [2021-07-13 20:05:42,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:42,262 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 719 transitions. [2021-07-13 20:05:42,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:05:42,262 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:42,262 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:42,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:42,479 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:42,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:42,479 INFO L82 PathProgramCache]: Analyzing trace with hash -271811723, now seen corresponding path program 31 times [2021-07-13 20:05:42,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:42,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824282209] [2021-07-13 20:05:42,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:42,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:42,638 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:42,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:42,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824282209] [2021-07-13 20:05:42,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824282209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:42,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696836824] [2021-07-13 20:05:42,638 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:05:42,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:42,670 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:05:42,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:42,911 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:42,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696836824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:42,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:42,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-13 20:05:42,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681579921] [2021-07-13 20:05:42,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:05:42,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:42,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:05:42,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:05:42,912 INFO L87 Difference]: Start difference. First operand 296 states and 719 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:44,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:44,455 INFO L93 Difference]: Finished difference Result 836 states and 1776 transitions. [2021-07-13 20:05:44,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-13 20:05:44,455 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:05:44,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:44,458 INFO L225 Difference]: With dead ends: 836 [2021-07-13 20:05:44,458 INFO L226 Difference]: Without dead ends: 792 [2021-07-13 20:05:44,458 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 1395.3ms TimeCoverageRelationStatistics Valid=839, Invalid=5013, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 20:05:44,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2021-07-13 20:05:44,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 410. [2021-07-13 20:05:44,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.5623471882640585) internal successors, (1048), 409 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:44,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1048 transitions. [2021-07-13 20:05:44,466 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1048 transitions. Word has length 25 [2021-07-13 20:05:44,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:44,466 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 1048 transitions. [2021-07-13 20:05:44,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:44,466 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1048 transitions. [2021-07-13 20:05:44,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:05:44,467 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:44,467 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:44,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-13 20:05:44,681 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:44,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:44,681 INFO L82 PathProgramCache]: Analyzing trace with hash 378257247, now seen corresponding path program 32 times [2021-07-13 20:05:44,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:44,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534714605] [2021-07-13 20:05:44,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:44,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:44,781 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:44,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:44,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534714605] [2021-07-13 20:05:44,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534714605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:44,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161475974] [2021-07-13 20:05:44,781 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 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 20:05:44,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:05:44,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:44,803 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:05:44,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:45,041 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:45,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161475974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:45,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:45,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-13 20:05:45,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456557322] [2021-07-13 20:05:45,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:05:45,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:45,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:05:45,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:05:45,042 INFO L87 Difference]: Start difference. First operand 410 states and 1048 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:46,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:46,714 INFO L93 Difference]: Finished difference Result 801 states and 1700 transitions. [2021-07-13 20:05:46,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:05:46,714 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:05:46,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:46,717 INFO L225 Difference]: With dead ends: 801 [2021-07-13 20:05:46,717 INFO L226 Difference]: Without dead ends: 766 [2021-07-13 20:05:46,717 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2153 ImplicationChecksByTransitivity, 1459.7ms TimeCoverageRelationStatistics Valid=912, Invalid=5568, Unknown=0, NotChecked=0, Total=6480 [2021-07-13 20:05:46,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-07-13 20:05:46,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 300. [2021-07-13 20:05:46,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.5050167224080266) internal successors, (749), 299 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:46,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 749 transitions. [2021-07-13 20:05:46,724 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 749 transitions. Word has length 25 [2021-07-13 20:05:46,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:46,724 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 749 transitions. [2021-07-13 20:05:46,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:46,724 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 749 transitions. [2021-07-13 20:05:46,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:05:46,725 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:46,725 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:46,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-13 20:05:46,941 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:46,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:46,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1682602555, now seen corresponding path program 33 times [2021-07-13 20:05:46,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:46,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757761205] [2021-07-13 20:05:46,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:46,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:47,046 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:47,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:47,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757761205] [2021-07-13 20:05:47,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757761205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:47,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659166111] [2021-07-13 20:05:47,046 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 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 20:05:47,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:05:47,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:47,069 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:05:47,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:47,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659166111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:47,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:47,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-13 20:05:47,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718192305] [2021-07-13 20:05:47,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:05:47,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:47,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:05:47,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:05:47,299 INFO L87 Difference]: Start difference. First operand 300 states and 749 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:48,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:48,471 INFO L93 Difference]: Finished difference Result 499 states and 1080 transitions. [2021-07-13 20:05:48,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:05:48,471 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:05:48,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:48,473 INFO L225 Difference]: With dead ends: 499 [2021-07-13 20:05:48,473 INFO L226 Difference]: Without dead ends: 478 [2021-07-13 20:05:48,473 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 1028.2ms TimeCoverageRelationStatistics Valid=567, Invalid=3593, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:05:48,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-07-13 20:05:48,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 294. [2021-07-13 20:05:48,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.5187713310580206) internal successors, (738), 293 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:48,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 738 transitions. [2021-07-13 20:05:48,478 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 738 transitions. Word has length 25 [2021-07-13 20:05:48,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:48,478 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 738 transitions. [2021-07-13 20:05:48,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:48,478 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 738 transitions. [2021-07-13 20:05:48,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:05:48,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:48,479 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:48,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-13 20:05:48,687 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:48,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:48,688 INFO L82 PathProgramCache]: Analyzing trace with hash 2077134939, now seen corresponding path program 34 times [2021-07-13 20:05:48,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:48,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533175193] [2021-07-13 20:05:48,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:48,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:48,779 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:48,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:48,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533175193] [2021-07-13 20:05:48,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533175193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:48,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946057370] [2021-07-13 20:05:48,780 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 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 20:05:48,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:05:48,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:48,803 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:05:48,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:49,025 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:49,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946057370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:49,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:49,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-13 20:05:49,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461808320] [2021-07-13 20:05:49,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:05:49,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:49,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:05:49,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:05:49,026 INFO L87 Difference]: Start difference. First operand 294 states and 738 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:49,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:49,851 INFO L93 Difference]: Finished difference Result 435 states and 957 transitions. [2021-07-13 20:05:49,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:05:49,851 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:05:49,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:49,852 INFO L225 Difference]: With dead ends: 435 [2021-07-13 20:05:49,852 INFO L226 Difference]: Without dead ends: 382 [2021-07-13 20:05:49,853 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 765.7ms TimeCoverageRelationStatistics Valid=406, Invalid=2350, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:05:49,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-07-13 20:05:49,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 286. [2021-07-13 20:05:49,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.389473684210526) internal successors, (681), 285 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:49,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 681 transitions. [2021-07-13 20:05:49,857 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 681 transitions. Word has length 25 [2021-07-13 20:05:49,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:49,857 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 681 transitions. [2021-07-13 20:05:49,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:49,857 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 681 transitions. [2021-07-13 20:05:49,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:05:49,858 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:49,858 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:50,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-13 20:05:50,074 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:50,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:50,075 INFO L82 PathProgramCache]: Analyzing trace with hash 2090603063, now seen corresponding path program 35 times [2021-07-13 20:05:50,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:50,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597100095] [2021-07-13 20:05:50,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:50,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:50,184 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:50,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:50,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597100095] [2021-07-13 20:05:50,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597100095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:50,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056591160] [2021-07-13 20:05:50,185 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 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 20:05:50,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:05:50,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:50,216 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:05:50,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:50,448 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:50,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056591160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:50,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:50,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-13 20:05:50,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977214507] [2021-07-13 20:05:50,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:05:50,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:50,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:05:50,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:05:50,449 INFO L87 Difference]: Start difference. First operand 286 states and 681 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:51,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:51,459 INFO L93 Difference]: Finished difference Result 526 states and 1119 transitions. [2021-07-13 20:05:51,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:05:51,460 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:05:51,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:51,461 INFO L225 Difference]: With dead ends: 526 [2021-07-13 20:05:51,461 INFO L226 Difference]: Without dead ends: 447 [2021-07-13 20:05:51,462 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 918.8ms TimeCoverageRelationStatistics Valid=403, Invalid=2789, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:05:51,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-07-13 20:05:51,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 326. [2021-07-13 20:05:51,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.3015384615384615) internal successors, (748), 325 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:51,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 748 transitions. [2021-07-13 20:05:51,467 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 748 transitions. Word has length 25 [2021-07-13 20:05:51,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:51,467 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 748 transitions. [2021-07-13 20:05:51,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:51,467 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 748 transitions. [2021-07-13 20:05:51,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:05:51,468 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:51,468 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:51,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:51,681 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:51,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:51,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1554295263, now seen corresponding path program 36 times [2021-07-13 20:05:51,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:51,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032173275] [2021-07-13 20:05:51,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:51,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:51,787 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:51,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:51,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032173275] [2021-07-13 20:05:51,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032173275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:51,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753135873] [2021-07-13 20:05:51,788 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 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 20:05:51,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:05:51,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:51,813 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:05:51,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:52,037 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:52,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753135873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:52,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:52,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-13 20:05:52,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705732224] [2021-07-13 20:05:52,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:05:52,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:52,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:05:52,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:05:52,039 INFO L87 Difference]: Start difference. First operand 326 states and 748 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:52,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:52,954 INFO L93 Difference]: Finished difference Result 471 states and 986 transitions. [2021-07-13 20:05:52,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:05:52,954 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:05:52,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:52,955 INFO L225 Difference]: With dead ends: 471 [2021-07-13 20:05:52,955 INFO L226 Difference]: Without dead ends: 441 [2021-07-13 20:05:52,956 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 919.1ms TimeCoverageRelationStatistics Valid=404, Invalid=2788, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:05:52,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-07-13 20:05:52,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 285. [2021-07-13 20:05:52,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.3204225352112675) internal successors, (659), 284 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:52,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 659 transitions. [2021-07-13 20:05:52,960 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 659 transitions. Word has length 25 [2021-07-13 20:05:52,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:52,960 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 659 transitions. [2021-07-13 20:05:52,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:52,961 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 659 transitions. [2021-07-13 20:05:52,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:05:52,961 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:52,961 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:53,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-07-13 20:05:53,162 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:53,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:53,162 INFO L82 PathProgramCache]: Analyzing trace with hash 679812231, now seen corresponding path program 37 times [2021-07-13 20:05:53,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:53,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062118394] [2021-07-13 20:05:53,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:53,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:53,266 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:53,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:53,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062118394] [2021-07-13 20:05:53,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062118394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:53,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517687406] [2021-07-13 20:05:53,270 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 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 20:05:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:53,292 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:05:53,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:53,528 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:53,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517687406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:53,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:53,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-13 20:05:53,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441000666] [2021-07-13 20:05:53,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:05:53,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:53,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:05:53,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:05:53,530 INFO L87 Difference]: Start difference. First operand 285 states and 659 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:54,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:54,121 INFO L93 Difference]: Finished difference Result 371 states and 801 transitions. [2021-07-13 20:05:54,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:05:54,121 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:05:54,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:54,122 INFO L225 Difference]: With dead ends: 371 [2021-07-13 20:05:54,122 INFO L226 Difference]: Without dead ends: 357 [2021-07-13 20:05:54,123 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 650.8ms TimeCoverageRelationStatistics Valid=244, Invalid=1736, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:05:54,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-07-13 20:05:54,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 289. [2021-07-13 20:05:54,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.3194444444444446) internal successors, (668), 288 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:54,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 668 transitions. [2021-07-13 20:05:54,127 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 668 transitions. Word has length 25 [2021-07-13 20:05:54,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:54,127 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 668 transitions. [2021-07-13 20:05:54,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:54,127 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 668 transitions. [2021-07-13 20:05:54,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:05:54,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:54,128 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:54,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-13 20:05:54,345 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:54,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:54,345 INFO L82 PathProgramCache]: Analyzing trace with hash -332880301, now seen corresponding path program 38 times [2021-07-13 20:05:54,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:54,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190353430] [2021-07-13 20:05:54,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:54,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:54,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:54,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190353430] [2021-07-13 20:05:54,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190353430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:54,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27713604] [2021-07-13 20:05:54,443 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 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 20:05:54,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:05:54,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:54,466 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:05:54,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:54,695 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:54,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27713604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:54,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:54,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-13 20:05:54,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535734984] [2021-07-13 20:05:54,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:05:54,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:54,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:05:54,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:05:54,696 INFO L87 Difference]: Start difference. First operand 289 states and 668 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:55,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:55,527 INFO L93 Difference]: Finished difference Result 434 states and 912 transitions. [2021-07-13 20:05:55,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:05:55,528 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:05:55,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:55,529 INFO L225 Difference]: With dead ends: 434 [2021-07-13 20:05:55,529 INFO L226 Difference]: Without dead ends: 413 [2021-07-13 20:05:55,530 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 873.6ms TimeCoverageRelationStatistics Valid=426, Invalid=2880, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:05:55,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-07-13 20:05:55,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 289. [2021-07-13 20:05:55,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.3229166666666665) internal successors, (669), 288 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:55,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 669 transitions. [2021-07-13 20:05:55,534 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 669 transitions. Word has length 25 [2021-07-13 20:05:55,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:55,534 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 669 transitions. [2021-07-13 20:05:55,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:55,534 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 669 transitions. [2021-07-13 20:05:55,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:05:55,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:55,535 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:55,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:55,752 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:55,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:55,752 INFO L82 PathProgramCache]: Analyzing trace with hash -868110103, now seen corresponding path program 39 times [2021-07-13 20:05:55,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:55,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372005006] [2021-07-13 20:05:55,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:55,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:55,850 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:55,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:55,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372005006] [2021-07-13 20:05:55,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372005006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:55,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105307178] [2021-07-13 20:05:55,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:05:55,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:05:55,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:55,873 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:05:55,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:56,142 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:56,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105307178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:56,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:56,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-13 20:05:56,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666785984] [2021-07-13 20:05:56,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:05:56,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:56,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:05:56,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:05:56,143 INFO L87 Difference]: Start difference. First operand 289 states and 669 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:56,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:56,804 INFO L93 Difference]: Finished difference Result 408 states and 870 transitions. [2021-07-13 20:05:56,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:05:56,804 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:05:56,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:56,805 INFO L225 Difference]: With dead ends: 408 [2021-07-13 20:05:56,805 INFO L226 Difference]: Without dead ends: 355 [2021-07-13 20:05:56,805 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 693.1ms TimeCoverageRelationStatistics Valid=312, Invalid=1944, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:05:56,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-07-13 20:05:56,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 281. [2021-07-13 20:05:56,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.307142857142857) internal successors, (646), 280 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:56,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 646 transitions. [2021-07-13 20:05:56,809 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 646 transitions. Word has length 25 [2021-07-13 20:05:56,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:56,809 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 646 transitions. [2021-07-13 20:05:56,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:56,809 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 646 transitions. [2021-07-13 20:05:56,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:05:56,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:56,810 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:57,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-13 20:05:57,024 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:57,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:57,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1839386049, now seen corresponding path program 40 times [2021-07-13 20:05:57,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:57,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427409926] [2021-07-13 20:05:57,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:57,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:57,215 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:57,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:57,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427409926] [2021-07-13 20:05:57,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427409926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:57,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320342413] [2021-07-13 20:05:57,215 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 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 20:05:57,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:05:57,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:57,238 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:05:57,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:57,556 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:57,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320342413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:57,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:57,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:05:57,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434712766] [2021-07-13 20:05:57,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:05:57,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:57,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:05:57,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:05:57,558 INFO L87 Difference]: Start difference. First operand 281 states and 646 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:59,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:59,765 INFO L93 Difference]: Finished difference Result 487 states and 1044 transitions. [2021-07-13 20:05:59,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:05:59,765 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:05:59,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:59,767 INFO L225 Difference]: With dead ends: 487 [2021-07-13 20:05:59,767 INFO L226 Difference]: Without dead ends: 473 [2021-07-13 20:05:59,767 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 2145.4ms TimeCoverageRelationStatistics Valid=612, Invalid=3294, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:05:59,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-07-13 20:05:59,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 299. [2021-07-13 20:05:59,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.291946308724832) internal successors, (683), 298 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:59,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 683 transitions. [2021-07-13 20:05:59,771 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 683 transitions. Word has length 25 [2021-07-13 20:05:59,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:59,771 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 683 transitions. [2021-07-13 20:05:59,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:59,772 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 683 transitions. [2021-07-13 20:05:59,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:05:59,772 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:59,772 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:59,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:59,987 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:59,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:59,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1319395975, now seen corresponding path program 41 times [2021-07-13 20:05:59,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:59,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928737335] [2021-07-13 20:05:59,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:59,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:00,147 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:00,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:00,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928737335] [2021-07-13 20:06:00,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928737335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:00,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7417737] [2021-07-13 20:06:00,147 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 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 20:06:00,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:06:00,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:00,183 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:06:00,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:00,501 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:00,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7417737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:00,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:00,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:06:00,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921276540] [2021-07-13 20:06:00,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:06:00,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:00,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:06:00,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:06:00,502 INFO L87 Difference]: Start difference. First operand 299 states and 683 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:02,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:02,884 INFO L93 Difference]: Finished difference Result 516 states and 1115 transitions. [2021-07-13 20:06:02,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 20:06:02,884 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:06:02,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:02,886 INFO L225 Difference]: With dead ends: 516 [2021-07-13 20:06:02,886 INFO L226 Difference]: Without dead ends: 502 [2021-07-13 20:06:02,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 2286.8ms TimeCoverageRelationStatistics Valid=763, Invalid=3793, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:06:02,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-07-13 20:06:02,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 301. [2021-07-13 20:06:02,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.3) internal successors, (690), 300 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:02,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 690 transitions. [2021-07-13 20:06:02,891 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 690 transitions. Word has length 25 [2021-07-13 20:06:02,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:02,891 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 690 transitions. [2021-07-13 20:06:02,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:02,891 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 690 transitions. [2021-07-13 20:06:02,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:06:02,892 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:02,892 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:03,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-13 20:06:03,094 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:03,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:03,095 INFO L82 PathProgramCache]: Analyzing trace with hash 857611235, now seen corresponding path program 42 times [2021-07-13 20:06:03,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:03,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962523189] [2021-07-13 20:06:03,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:03,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:03,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962523189] [2021-07-13 20:06:03,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962523189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:03,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442752223] [2021-07-13 20:06:03,281 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:03,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:06:03,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:03,306 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:06:03,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:03,595 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 20:06:03,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442752223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:03,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:03,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-07-13 20:06:03,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724161415] [2021-07-13 20:06:03,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:06:03,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:03,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:06:03,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:06:03,597 INFO L87 Difference]: Start difference. First operand 301 states and 690 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:04,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:04,742 INFO L93 Difference]: Finished difference Result 558 states and 1181 transitions. [2021-07-13 20:06:04,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:06:04,743 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:06:04,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:04,744 INFO L225 Difference]: With dead ends: 558 [2021-07-13 20:06:04,744 INFO L226 Difference]: Without dead ends: 509 [2021-07-13 20:06:04,744 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 1235.5ms TimeCoverageRelationStatistics Valid=566, Invalid=3724, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:06:04,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-07-13 20:06:04,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 367. [2021-07-13 20:06:04,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.3524590163934427) internal successors, (861), 366 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:04,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 861 transitions. [2021-07-13 20:06:04,750 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 861 transitions. Word has length 27 [2021-07-13 20:06:04,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:04,750 INFO L482 AbstractCegarLoop]: Abstraction has 367 states and 861 transitions. [2021-07-13 20:06:04,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:04,750 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 861 transitions. [2021-07-13 20:06:04,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:06:04,751 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:04,751 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:04,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:04,952 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:04,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:04,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1087323029, now seen corresponding path program 43 times [2021-07-13 20:06:04,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:04,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139540095] [2021-07-13 20:06:04,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:04,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:05,098 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:05,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:05,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139540095] [2021-07-13 20:06:05,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139540095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:05,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997656760] [2021-07-13 20:06:05,098 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:05,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:05,121 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:06:05,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:05,371 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 20:06:05,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997656760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:05,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:05,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 20:06:05,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239356926] [2021-07-13 20:06:05,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:06:05,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:05,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:06:05,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:06:05,373 INFO L87 Difference]: Start difference. First operand 367 states and 861 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:06,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:06,628 INFO L93 Difference]: Finished difference Result 582 states and 1226 transitions. [2021-07-13 20:06:06,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:06:06,630 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:06:06,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:06,631 INFO L225 Difference]: With dead ends: 582 [2021-07-13 20:06:06,631 INFO L226 Difference]: Without dead ends: 544 [2021-07-13 20:06:06,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 1214.7ms TimeCoverageRelationStatistics Valid=636, Invalid=4194, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:06:06,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-07-13 20:06:06,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 370. [2021-07-13 20:06:06,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.3495934959349594) internal successors, (867), 369 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:06,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 867 transitions. [2021-07-13 20:06:06,637 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 867 transitions. Word has length 27 [2021-07-13 20:06:06,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:06,637 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 867 transitions. [2021-07-13 20:06:06,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:06,638 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 867 transitions. [2021-07-13 20:06:06,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:06:06,638 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:06,638 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:06,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-13 20:06:06,852 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:06,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:06,852 INFO L82 PathProgramCache]: Analyzing trace with hash -254898513, now seen corresponding path program 44 times [2021-07-13 20:06:06,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:06,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618738202] [2021-07-13 20:06:06,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:06,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:07,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:07,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618738202] [2021-07-13 20:06:07,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618738202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:07,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052003873] [2021-07-13 20:06:07,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:07,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:06:07,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:07,050 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:06:07,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:07,344 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 20:06:07,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052003873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:07,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:07,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 20:06:07,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973300643] [2021-07-13 20:06:07,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:06:07,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:07,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:06:07,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:06:07,346 INFO L87 Difference]: Start difference. First operand 370 states and 867 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:08,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:08,955 INFO L93 Difference]: Finished difference Result 675 states and 1384 transitions. [2021-07-13 20:06:08,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 20:06:08,956 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:06:08,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:08,958 INFO L225 Difference]: With dead ends: 675 [2021-07-13 20:06:08,958 INFO L226 Difference]: Without dead ends: 636 [2021-07-13 20:06:08,958 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 1467.8ms TimeCoverageRelationStatistics Valid=733, Invalid=4817, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:06:08,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-07-13 20:06:08,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 376. [2021-07-13 20:06:08,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.3573333333333335) internal successors, (884), 375 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:08,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 884 transitions. [2021-07-13 20:06:08,964 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 884 transitions. Word has length 27 [2021-07-13 20:06:08,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:08,964 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 884 transitions. [2021-07-13 20:06:08,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:08,964 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 884 transitions. [2021-07-13 20:06:08,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:06:08,965 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:08,965 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:09,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-13 20:06:09,168 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:09,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:09,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1519826373, now seen corresponding path program 45 times [2021-07-13 20:06:09,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:09,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168467373] [2021-07-13 20:06:09,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:09,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:09,339 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:09,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:09,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168467373] [2021-07-13 20:06:09,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168467373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:09,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527801149] [2021-07-13 20:06:09,339 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 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 20:06:09,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:06:09,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:09,362 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:06:09,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:09,684 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 20:06:09,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527801149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:09,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:09,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 20:06:09,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049568176] [2021-07-13 20:06:09,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:06:09,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:09,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:06:09,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:06:09,685 INFO L87 Difference]: Start difference. First operand 376 states and 884 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:11,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:11,336 INFO L93 Difference]: Finished difference Result 647 states and 1333 transitions. [2021-07-13 20:06:11,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:06:11,336 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:06:11,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:11,338 INFO L225 Difference]: With dead ends: 647 [2021-07-13 20:06:11,338 INFO L226 Difference]: Without dead ends: 620 [2021-07-13 20:06:11,338 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1553 ImplicationChecksByTransitivity, 1545.7ms TimeCoverageRelationStatistics Valid=718, Invalid=4684, Unknown=0, NotChecked=0, Total=5402 [2021-07-13 20:06:11,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-07-13 20:06:11,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 389. [2021-07-13 20:06:11,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.3556701030927836) internal successors, (914), 388 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:11,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 914 transitions. [2021-07-13 20:06:11,344 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 914 transitions. Word has length 27 [2021-07-13 20:06:11,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:11,344 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 914 transitions. [2021-07-13 20:06:11,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:11,344 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 914 transitions. [2021-07-13 20:06:11,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:06:11,345 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:11,345 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:11,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:11,561 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:11,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:11,561 INFO L82 PathProgramCache]: Analyzing trace with hash -383641101, now seen corresponding path program 46 times [2021-07-13 20:06:11,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:11,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356010152] [2021-07-13 20:06:11,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:11,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:11,721 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:11,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:11,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356010152] [2021-07-13 20:06:11,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356010152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:11,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985765300] [2021-07-13 20:06:11,721 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 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 20:06:11,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:06:11,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:11,745 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:06:11,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:12,010 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 20:06:12,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985765300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:12,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:12,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 20:06:12,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88240933] [2021-07-13 20:06:12,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:06:12,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:12,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:06:12,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:06:12,011 INFO L87 Difference]: Start difference. First operand 389 states and 914 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:13,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:13,499 INFO L93 Difference]: Finished difference Result 665 states and 1367 transitions. [2021-07-13 20:06:13,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:06:13,500 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:06:13,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:13,502 INFO L225 Difference]: With dead ends: 665 [2021-07-13 20:06:13,502 INFO L226 Difference]: Without dead ends: 641 [2021-07-13 20:06:13,502 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1522 ImplicationChecksByTransitivity, 1342.0ms TimeCoverageRelationStatistics Valid=763, Invalid=4349, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:06:13,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-07-13 20:06:13,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 390. [2021-07-13 20:06:13,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.3573264781491003) internal successors, (917), 389 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:13,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 917 transitions. [2021-07-13 20:06:13,508 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 917 transitions. Word has length 27 [2021-07-13 20:06:13,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:13,508 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 917 transitions. [2021-07-13 20:06:13,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:13,508 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 917 transitions. [2021-07-13 20:06:13,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:06:13,509 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:13,509 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:13,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-13 20:06:13,709 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:13,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:13,710 INFO L82 PathProgramCache]: Analyzing trace with hash 266427869, now seen corresponding path program 47 times [2021-07-13 20:06:13,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:13,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967890545] [2021-07-13 20:06:13,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:13,871 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:13,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:13,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967890545] [2021-07-13 20:06:13,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967890545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:13,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720068032] [2021-07-13 20:06:13,871 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 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 20:06:13,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:06:13,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:13,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:06:13,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:14,228 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 20:06:14,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720068032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:14,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:14,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 20:06:14,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800927438] [2021-07-13 20:06:14,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:06:14,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:14,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:06:14,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:06:14,230 INFO L87 Difference]: Start difference. First operand 390 states and 917 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:16,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:16,409 INFO L93 Difference]: Finished difference Result 729 states and 1539 transitions. [2021-07-13 20:06:16,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 20:06:16,410 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:06:16,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:16,412 INFO L225 Difference]: With dead ends: 729 [2021-07-13 20:06:16,412 INFO L226 Difference]: Without dead ends: 699 [2021-07-13 20:06:16,412 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1992 ImplicationChecksByTransitivity, 1985.1ms TimeCoverageRelationStatistics Valid=949, Invalid=5857, Unknown=0, NotChecked=0, Total=6806 [2021-07-13 20:06:16,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-07-13 20:06:16,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 414. [2021-07-13 20:06:16,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.358353510895884) internal successors, (974), 413 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:16,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 974 transitions. [2021-07-13 20:06:16,418 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 974 transitions. Word has length 27 [2021-07-13 20:06:16,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:16,418 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 974 transitions. [2021-07-13 20:06:16,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:16,419 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 974 transitions. [2021-07-13 20:06:16,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:06:16,419 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:16,419 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:16,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:16,633 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:16,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:16,633 INFO L82 PathProgramCache]: Analyzing trace with hash 209025461, now seen corresponding path program 48 times [2021-07-13 20:06:16,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:16,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151988237] [2021-07-13 20:06:16,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:16,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:16,773 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:16,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:16,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151988237] [2021-07-13 20:06:16,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151988237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:16,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097441830] [2021-07-13 20:06:16,774 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 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 20:06:16,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:06:16,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:16,796 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:06:16,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:17,071 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 20:06:17,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097441830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:17,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:17,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 20:06:17,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333952242] [2021-07-13 20:06:17,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:06:17,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:17,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:06:17,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:06:17,072 INFO L87 Difference]: Start difference. First operand 414 states and 974 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:19,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:19,038 INFO L93 Difference]: Finished difference Result 787 states and 1650 transitions. [2021-07-13 20:06:19,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:06:19,038 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:06:19,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:19,040 INFO L225 Difference]: With dead ends: 787 [2021-07-13 20:06:19,040 INFO L226 Difference]: Without dead ends: 742 [2021-07-13 20:06:19,041 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2042 ImplicationChecksByTransitivity, 1841.1ms TimeCoverageRelationStatistics Valid=917, Invalid=5563, Unknown=0, NotChecked=0, Total=6480 [2021-07-13 20:06:19,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-07-13 20:06:19,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 468. [2021-07-13 20:06:19,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 2.3618843683083512) internal successors, (1103), 467 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:19,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1103 transitions. [2021-07-13 20:06:19,048 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1103 transitions. Word has length 27 [2021-07-13 20:06:19,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:19,048 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1103 transitions. [2021-07-13 20:06:19,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:19,048 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1103 transitions. [2021-07-13 20:06:19,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:06:19,049 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:19,049 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:19,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-13 20:06:19,250 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:19,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:19,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1055902399, now seen corresponding path program 49 times [2021-07-13 20:06:19,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:19,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793888033] [2021-07-13 20:06:19,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:19,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:19,401 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:19,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:19,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793888033] [2021-07-13 20:06:19,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793888033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:19,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057110683] [2021-07-13 20:06:19,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:06:19,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:19,426 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:06:19,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:19,683 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 20:06:19,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057110683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:19,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:19,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 20:06:19,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267738172] [2021-07-13 20:06:19,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:06:19,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:19,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:06:19,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:06:19,684 INFO L87 Difference]: Start difference. First operand 468 states and 1103 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:21,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:21,001 INFO L93 Difference]: Finished difference Result 716 states and 1520 transitions. [2021-07-13 20:06:21,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:06:21,002 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:06:21,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:21,004 INFO L225 Difference]: With dead ends: 716 [2021-07-13 20:06:21,004 INFO L226 Difference]: Without dead ends: 689 [2021-07-13 20:06:21,004 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 1220.1ms TimeCoverageRelationStatistics Valid=600, Invalid=3432, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:06:21,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-07-13 20:06:21,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 461. [2021-07-13 20:06:21,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 2.3304347826086955) internal successors, (1072), 460 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:21,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1072 transitions. [2021-07-13 20:06:21,010 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1072 transitions. Word has length 27 [2021-07-13 20:06:21,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:21,011 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1072 transitions. [2021-07-13 20:06:21,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:21,011 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1072 transitions. [2021-07-13 20:06:21,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:06:21,011 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:21,011 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:21,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-13 20:06:21,221 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:21,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:21,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1174374461, now seen corresponding path program 50 times [2021-07-13 20:06:21,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:21,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349535676] [2021-07-13 20:06:21,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:21,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:21,367 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:21,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:21,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349535676] [2021-07-13 20:06:21,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349535676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:21,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115019386] [2021-07-13 20:06:21,368 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:06:21,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:06:21,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:21,399 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:06:21,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:21,654 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 20:06:21,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115019386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:21,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:21,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 20:06:21,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961822516] [2021-07-13 20:06:21,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:06:21,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:21,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:06:21,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:06:21,655 INFO L87 Difference]: Start difference. First operand 461 states and 1072 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:23,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:23,239 INFO L93 Difference]: Finished difference Result 711 states and 1531 transitions. [2021-07-13 20:06:23,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:06:23,239 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:06:23,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:23,241 INFO L225 Difference]: With dead ends: 711 [2021-07-13 20:06:23,241 INFO L226 Difference]: Without dead ends: 687 [2021-07-13 20:06:23,242 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 1407.0ms TimeCoverageRelationStatistics Valid=712, Invalid=3710, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:06:23,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-07-13 20:06:23,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 484. [2021-07-13 20:06:23,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 2.3064182194616976) internal successors, (1114), 483 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:23,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1114 transitions. [2021-07-13 20:06:23,248 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1114 transitions. Word has length 27 [2021-07-13 20:06:23,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:23,248 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1114 transitions. [2021-07-13 20:06:23,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:23,249 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1114 transitions. [2021-07-13 20:06:23,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:06:23,249 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:23,249 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:23,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-13 20:06:23,460 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:23,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:23,460 INFO L82 PathProgramCache]: Analyzing trace with hash -52082337, now seen corresponding path program 51 times [2021-07-13 20:06:23,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:23,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759286863] [2021-07-13 20:06:23,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:23,576 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:23,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:23,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759286863] [2021-07-13 20:06:23,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759286863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:23,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76491609] [2021-07-13 20:06:23,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:23,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:06:23,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:23,605 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:06:23,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:23,848 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:23,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76491609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:23,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:23,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-13 20:06:23,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34047546] [2021-07-13 20:06:23,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:06:23,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:23,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:06:23,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:06:23,850 INFO L87 Difference]: Start difference. First operand 484 states and 1114 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:25,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:25,094 INFO L93 Difference]: Finished difference Result 697 states and 1499 transitions. [2021-07-13 20:06:25,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:06:25,095 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:06:25,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:25,097 INFO L225 Difference]: With dead ends: 697 [2021-07-13 20:06:25,097 INFO L226 Difference]: Without dead ends: 672 [2021-07-13 20:06:25,097 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 1164.0ms TimeCoverageRelationStatistics Valid=617, Invalid=3805, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:06:25,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-07-13 20:06:25,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 448. [2021-07-13 20:06:25,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 2.250559284116331) internal successors, (1006), 447 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:25,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1006 transitions. [2021-07-13 20:06:25,103 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1006 transitions. Word has length 27 [2021-07-13 20:06:25,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:25,103 INFO L482 AbstractCegarLoop]: Abstraction has 448 states and 1006 transitions. [2021-07-13 20:06:25,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:25,104 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1006 transitions. [2021-07-13 20:06:25,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:06:25,104 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:25,104 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:25,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-13 20:06:25,321 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:25,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:25,321 INFO L82 PathProgramCache]: Analyzing trace with hash -2112942139, now seen corresponding path program 52 times [2021-07-13 20:06:25,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:25,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376970881] [2021-07-13 20:06:25,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:25,423 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:25,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:25,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376970881] [2021-07-13 20:06:25,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376970881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:25,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076376222] [2021-07-13 20:06:25,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:25,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:06:25,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:25,446 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:06:25,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:25,723 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:25,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076376222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:25,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:25,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-13 20:06:25,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567759133] [2021-07-13 20:06:25,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:06:25,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:25,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:06:25,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:06:25,725 INFO L87 Difference]: Start difference. First operand 448 states and 1006 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:26,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:26,631 INFO L93 Difference]: Finished difference Result 644 states and 1380 transitions. [2021-07-13 20:06:26,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:06:26,632 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:06:26,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:26,634 INFO L225 Difference]: With dead ends: 644 [2021-07-13 20:06:26,634 INFO L226 Difference]: Without dead ends: 630 [2021-07-13 20:06:26,634 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 879.5ms TimeCoverageRelationStatistics Valid=406, Invalid=2674, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:06:26,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-07-13 20:06:26,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 493. [2021-07-13 20:06:26,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 2.252032520325203) internal successors, (1108), 492 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:26,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1108 transitions. [2021-07-13 20:06:26,640 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1108 transitions. Word has length 27 [2021-07-13 20:06:26,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:26,640 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1108 transitions. [2021-07-13 20:06:26,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:26,640 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1108 transitions. [2021-07-13 20:06:26,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:06:26,641 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:26,641 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:26,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:26,841 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:26,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:26,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1169332625, now seen corresponding path program 53 times [2021-07-13 20:06:26,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:26,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822673942] [2021-07-13 20:06:26,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:26,942 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:26,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:26,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822673942] [2021-07-13 20:06:26,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822673942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:26,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443131824] [2021-07-13 20:06:26,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:26,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:06:26,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:26,968 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:06:26,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:27,236 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:27,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443131824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:27,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:27,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-13 20:06:27,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424202422] [2021-07-13 20:06:27,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:06:27,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:27,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:06:27,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:06:27,238 INFO L87 Difference]: Start difference. First operand 493 states and 1108 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:28,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:28,256 INFO L93 Difference]: Finished difference Result 666 states and 1417 transitions. [2021-07-13 20:06:28,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:06:28,257 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:06:28,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:28,258 INFO L225 Difference]: With dead ends: 666 [2021-07-13 20:06:28,258 INFO L226 Difference]: Without dead ends: 627 [2021-07-13 20:06:28,259 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 988.8ms TimeCoverageRelationStatistics Valid=547, Invalid=3235, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:06:28,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-07-13 20:06:28,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 451. [2021-07-13 20:06:28,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 2.2355555555555555) internal successors, (1006), 450 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:28,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 1006 transitions. [2021-07-13 20:06:28,264 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 1006 transitions. Word has length 27 [2021-07-13 20:06:28,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:28,264 INFO L482 AbstractCegarLoop]: Abstraction has 451 states and 1006 transitions. [2021-07-13 20:06:28,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:28,264 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 1006 transitions. [2021-07-13 20:06:28,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:06:28,265 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:28,265 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:28,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-07-13 20:06:28,465 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:28,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:28,466 INFO L82 PathProgramCache]: Analyzing trace with hash 634102823, now seen corresponding path program 54 times [2021-07-13 20:06:28,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:28,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626030136] [2021-07-13 20:06:28,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:28,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:28,561 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:28,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:28,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626030136] [2021-07-13 20:06:28,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626030136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:28,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624545690] [2021-07-13 20:06:28,561 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 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 20:06:28,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:06:28,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:28,596 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:06:28,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:28,837 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:28,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624545690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:28,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:28,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-07-13 20:06:28,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093113284] [2021-07-13 20:06:28,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:06:28,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:28,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:06:28,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:06:28,838 INFO L87 Difference]: Start difference. First operand 451 states and 1006 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:29,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:29,482 INFO L93 Difference]: Finished difference Result 558 states and 1193 transitions. [2021-07-13 20:06:29,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:06:29,482 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:06:29,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:29,483 INFO L225 Difference]: With dead ends: 558 [2021-07-13 20:06:29,483 INFO L226 Difference]: Without dead ends: 520 [2021-07-13 20:06:29,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 692.9ms TimeCoverageRelationStatistics Valid=356, Invalid=1996, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:06:29,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-07-13 20:06:29,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 427. [2021-07-13 20:06:29,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 2.1338028169014085) internal successors, (909), 426 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:29,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 909 transitions. [2021-07-13 20:06:29,488 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 909 transitions. Word has length 27 [2021-07-13 20:06:29,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:29,488 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 909 transitions. [2021-07-13 20:06:29,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:29,488 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 909 transitions. [2021-07-13 20:06:29,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:06:29,489 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:29,489 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:29,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:29,691 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:29,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:29,691 INFO L82 PathProgramCache]: Analyzing trace with hash 177512313, now seen corresponding path program 55 times [2021-07-13 20:06:29,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:29,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558221279] [2021-07-13 20:06:29,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:29,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:29,830 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:29,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:29,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558221279] [2021-07-13 20:06:29,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558221279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:29,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935201970] [2021-07-13 20:06:29,831 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 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 20:06:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:29,852 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:06:29,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:30,080 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 20:06:30,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935201970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:30,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:30,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-13 20:06:30,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848995983] [2021-07-13 20:06:30,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:06:30,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:30,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:06:30,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:06:30,081 INFO L87 Difference]: Start difference. First operand 427 states and 909 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:31,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:31,551 INFO L93 Difference]: Finished difference Result 575 states and 1167 transitions. [2021-07-13 20:06:31,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:06:31,551 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:06:31,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:31,553 INFO L225 Difference]: With dead ends: 575 [2021-07-13 20:06:31,553 INFO L226 Difference]: Without dead ends: 558 [2021-07-13 20:06:31,553 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1488 ImplicationChecksByTransitivity, 1447.3ms TimeCoverageRelationStatistics Valid=739, Invalid=4091, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:06:31,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-07-13 20:06:31,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 341. [2021-07-13 20:06:31,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.126470588235294) internal successors, (723), 340 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:31,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 723 transitions. [2021-07-13 20:06:31,558 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 723 transitions. Word has length 27 [2021-07-13 20:06:31,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:31,558 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 723 transitions. [2021-07-13 20:06:31,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:31,558 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 723 transitions. [2021-07-13 20:06:31,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:06:31,558 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:31,558 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:31,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:31,763 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:31,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:31,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1680806143, now seen corresponding path program 56 times [2021-07-13 20:06:31,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:31,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239240787] [2021-07-13 20:06:31,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:31,798 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:06:31,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:31,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239240787] [2021-07-13 20:06:31,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239240787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:31,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758123459] [2021-07-13 20:06:31,798 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 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 20:06:31,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:06:31,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:31,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:06:31,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:06:31,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758123459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:31,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:31,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 20:06:31,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626412357] [2021-07-13 20:06:31,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:06:31,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:31,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:06:31,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:06:31,858 INFO L87 Difference]: Start difference. First operand 341 states and 723 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:31,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:31,908 INFO L93 Difference]: Finished difference Result 501 states and 1034 transitions. [2021-07-13 20:06:31,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:06:31,908 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:06:31,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:31,909 INFO L225 Difference]: With dead ends: 501 [2021-07-13 20:06:31,909 INFO L226 Difference]: Without dead ends: 468 [2021-07-13 20:06:31,909 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:06:31,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-07-13 20:06:31,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 314. [2021-07-13 20:06:31,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.121405750798722) internal successors, (664), 313 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:31,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 664 transitions. [2021-07-13 20:06:31,913 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 664 transitions. Word has length 27 [2021-07-13 20:06:31,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:31,913 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 664 transitions. [2021-07-13 20:06:31,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:31,913 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 664 transitions. [2021-07-13 20:06:31,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:06:31,913 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:31,914 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:32,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:32,114 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:32,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:32,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1310861107, now seen corresponding path program 57 times [2021-07-13 20:06:32,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:32,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511818628] [2021-07-13 20:06:32,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:32,263 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:32,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:32,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511818628] [2021-07-13 20:06:32,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511818628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:32,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339940028] [2021-07-13 20:06:32,263 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 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 20:06:32,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:06:32,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:32,301 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 20:06:32,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:32,580 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:32,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339940028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:32,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:32,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-07-13 20:06:32,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883102870] [2021-07-13 20:06:32,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:06:32,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:32,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:06:32,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:06:32,581 INFO L87 Difference]: Start difference. First operand 314 states and 664 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:33,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:33,771 INFO L93 Difference]: Finished difference Result 613 states and 1226 transitions. [2021-07-13 20:06:33,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:06:33,771 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:06:33,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:33,772 INFO L225 Difference]: With dead ends: 613 [2021-07-13 20:06:33,772 INFO L226 Difference]: Without dead ends: 585 [2021-07-13 20:06:33,773 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 1101.9ms TimeCoverageRelationStatistics Valid=632, Invalid=3924, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:06:33,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-07-13 20:06:33,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 333. [2021-07-13 20:06:33,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.1204819277108435) internal successors, (704), 332 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:33,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 704 transitions. [2021-07-13 20:06:33,780 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 704 transitions. Word has length 29 [2021-07-13 20:06:33,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:33,780 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 704 transitions. [2021-07-13 20:06:33,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:33,780 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 704 transitions. [2021-07-13 20:06:33,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:06:33,781 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:33,781 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:33,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:33,981 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:33,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:33,982 INFO L82 PathProgramCache]: Analyzing trace with hash 75290793, now seen corresponding path program 58 times [2021-07-13 20:06:33,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:33,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772291633] [2021-07-13 20:06:33,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:33,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:34,088 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:34,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:34,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772291633] [2021-07-13 20:06:34,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772291633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:34,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161583934] [2021-07-13 20:06:34,088 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 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 20:06:34,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:06:34,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:34,144 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 20:06:34,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:34,451 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:34,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161583934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:34,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:34,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-07-13 20:06:34,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903671692] [2021-07-13 20:06:34,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:06:34,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:34,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:06:34,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:06:34,452 INFO L87 Difference]: Start difference. First operand 333 states and 704 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:36,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:36,223 INFO L93 Difference]: Finished difference Result 809 states and 1602 transitions. [2021-07-13 20:06:36,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:06:36,223 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:06:36,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:36,225 INFO L225 Difference]: With dead ends: 809 [2021-07-13 20:06:36,225 INFO L226 Difference]: Without dead ends: 761 [2021-07-13 20:06:36,225 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2202 ImplicationChecksByTransitivity, 1462.8ms TimeCoverageRelationStatistics Valid=866, Invalid=6106, Unknown=0, NotChecked=0, Total=6972 [2021-07-13 20:06:36,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2021-07-13 20:06:36,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 437. [2021-07-13 20:06:36,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 2.1376146788990824) internal successors, (932), 436 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:36,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 932 transitions. [2021-07-13 20:06:36,231 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 932 transitions. Word has length 29 [2021-07-13 20:06:36,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:36,231 INFO L482 AbstractCegarLoop]: Abstraction has 437 states and 932 transitions. [2021-07-13 20:06:36,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:36,231 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 932 transitions. [2021-07-13 20:06:36,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:06:36,232 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:36,232 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:36,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-07-13 20:06:36,433 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:36,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:36,433 INFO L82 PathProgramCache]: Analyzing trace with hash -937401739, now seen corresponding path program 59 times [2021-07-13 20:06:36,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:36,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706173069] [2021-07-13 20:06:36,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:36,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:36,538 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:36,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:36,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706173069] [2021-07-13 20:06:36,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706173069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:36,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241125745] [2021-07-13 20:06:36,539 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 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 20:06:36,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:06:36,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:36,580 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 20:06:36,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:36,846 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:36,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241125745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:36,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:36,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-07-13 20:06:36,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364193368] [2021-07-13 20:06:36,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:06:36,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:36,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:06:36,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:06:36,847 INFO L87 Difference]: Start difference. First operand 437 states and 932 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:38,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:38,963 INFO L93 Difference]: Finished difference Result 994 states and 1975 transitions. [2021-07-13 20:06:38,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 20:06:38,963 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:06:38,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:38,965 INFO L225 Difference]: With dead ends: 994 [2021-07-13 20:06:38,965 INFO L226 Difference]: Without dead ends: 943 [2021-07-13 20:06:38,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3389 ImplicationChecksByTransitivity, 1831.5ms TimeCoverageRelationStatistics Valid=1250, Invalid=8452, Unknown=0, NotChecked=0, Total=9702 [2021-07-13 20:06:38,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-07-13 20:06:38,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 420. [2021-07-13 20:06:38,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.1408114558472553) internal successors, (897), 419 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:38,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 897 transitions. [2021-07-13 20:06:38,972 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 897 transitions. Word has length 29 [2021-07-13 20:06:38,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:38,972 INFO L482 AbstractCegarLoop]: Abstraction has 420 states and 897 transitions. [2021-07-13 20:06:38,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:38,972 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 897 transitions. [2021-07-13 20:06:38,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:06:38,973 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:38,973 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:39,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:39,190 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:39,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:39,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1615340429, now seen corresponding path program 60 times [2021-07-13 20:06:39,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:39,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705340215] [2021-07-13 20:06:39,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:39,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:39,337 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:39,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:39,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705340215] [2021-07-13 20:06:39,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705340215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:39,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940343514] [2021-07-13 20:06:39,337 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 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 20:06:39,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:06:39,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:39,386 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 20:06:39,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:39,692 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:39,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940343514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:39,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:39,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-07-13 20:06:39,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468579119] [2021-07-13 20:06:39,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:06:39,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:39,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:06:39,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:06:39,694 INFO L87 Difference]: Start difference. First operand 420 states and 897 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:40,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:40,960 INFO L93 Difference]: Finished difference Result 665 states and 1331 transitions. [2021-07-13 20:06:40,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:06:40,961 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:06:40,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:40,962 INFO L225 Difference]: With dead ends: 665 [2021-07-13 20:06:40,962 INFO L226 Difference]: Without dead ends: 618 [2021-07-13 20:06:40,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 1134.9ms TimeCoverageRelationStatistics Valid=543, Invalid=3489, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:06:40,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-07-13 20:06:40,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 459. [2021-07-13 20:06:40,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.1397379912663754) internal successors, (980), 458 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:40,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 980 transitions. [2021-07-13 20:06:40,968 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 980 transitions. Word has length 29 [2021-07-13 20:06:40,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:40,968 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 980 transitions. [2021-07-13 20:06:40,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:40,968 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 980 transitions. [2021-07-13 20:06:40,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:06:40,968 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:40,968 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:41,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-07-13 20:06:41,169 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:41,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:41,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1666934335, now seen corresponding path program 61 times [2021-07-13 20:06:41,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:41,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110567849] [2021-07-13 20:06:41,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:41,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:41,282 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:41,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:41,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110567849] [2021-07-13 20:06:41,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110567849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:41,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209720745] [2021-07-13 20:06:41,283 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 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 20:06:41,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:41,306 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 20:06:41,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:41,617 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:41,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209720745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:41,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:41,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-07-13 20:06:41,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542762605] [2021-07-13 20:06:41,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:06:41,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:41,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:06:41,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:06:41,619 INFO L87 Difference]: Start difference. First operand 459 states and 980 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:43,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:43,369 INFO L93 Difference]: Finished difference Result 740 states and 1463 transitions. [2021-07-13 20:06:43,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:06:43,369 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:06:43,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:43,370 INFO L225 Difference]: With dead ends: 740 [2021-07-13 20:06:43,370 INFO L226 Difference]: Without dead ends: 683 [2021-07-13 20:06:43,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2071 ImplicationChecksByTransitivity, 1452.5ms TimeCoverageRelationStatistics Valid=756, Invalid=5886, Unknown=0, NotChecked=0, Total=6642 [2021-07-13 20:06:43,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-07-13 20:06:43,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 376. [2021-07-13 20:06:43,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.1413333333333333) internal successors, (803), 375 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:43,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 803 transitions. [2021-07-13 20:06:43,375 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 803 transitions. Word has length 29 [2021-07-13 20:06:43,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:43,375 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 803 transitions. [2021-07-13 20:06:43,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:43,376 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 803 transitions. [2021-07-13 20:06:43,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:06:43,376 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:43,376 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:43,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:43,577 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:43,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:43,577 INFO L82 PathProgramCache]: Analyzing trace with hash -303996619, now seen corresponding path program 62 times [2021-07-13 20:06:43,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:43,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590577128] [2021-07-13 20:06:43,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:43,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:43,775 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:43,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:43,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590577128] [2021-07-13 20:06:43,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590577128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:43,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052605377] [2021-07-13 20:06:43,775 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 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 20:06:43,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:06:43,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:43,806 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 20:06:43,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:44,147 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:44,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052605377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:44,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:44,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-07-13 20:06:44,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109898122] [2021-07-13 20:06:44,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:06:44,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:44,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:06:44,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:06:44,149 INFO L87 Difference]: Start difference. First operand 376 states and 803 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:47,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:47,988 INFO L93 Difference]: Finished difference Result 945 states and 1899 transitions. [2021-07-13 20:06:47,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-13 20:06:47,988 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have 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 20:06:47,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:47,989 INFO L225 Difference]: With dead ends: 945 [2021-07-13 20:06:47,990 INFO L226 Difference]: Without dead ends: 901 [2021-07-13 20:06:47,990 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 3573.1ms TimeCoverageRelationStatistics Valid=1530, Invalid=7782, Unknown=0, NotChecked=0, Total=9312 [2021-07-13 20:06:47,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-07-13 20:06:47,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 438. [2021-07-13 20:06:47,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.1556064073226544) internal successors, (942), 437 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:47,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 942 transitions. [2021-07-13 20:06:47,996 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 942 transitions. Word has length 29 [2021-07-13 20:06:47,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:47,997 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 942 transitions. [2021-07-13 20:06:47,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:47,997 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 942 transitions. [2021-07-13 20:06:47,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:06:47,997 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:47,997 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:48,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:48,213 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:48,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:48,213 INFO L82 PathProgramCache]: Analyzing trace with hash 649114413, now seen corresponding path program 63 times [2021-07-13 20:06:48,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:48,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000836006] [2021-07-13 20:06:48,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:48,423 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:48,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:48,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000836006] [2021-07-13 20:06:48,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000836006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:48,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620902058] [2021-07-13 20:06:48,423 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 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 20:06:48,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:06:48,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:48,448 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:06:48,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:48,723 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:48,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620902058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:48,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:48,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2021-07-13 20:06:48,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988324203] [2021-07-13 20:06:48,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:06:48,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:48,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:06:48,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:06:48,725 INFO L87 Difference]: Start difference. First operand 438 states and 942 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:49,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:49,789 INFO L93 Difference]: Finished difference Result 599 states and 1229 transitions. [2021-07-13 20:06:49,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:06:49,789 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:06:49,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:49,790 INFO L225 Difference]: With dead ends: 599 [2021-07-13 20:06:49,790 INFO L226 Difference]: Without dead ends: 567 [2021-07-13 20:06:49,793 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 1057.8ms TimeCoverageRelationStatistics Valid=363, Invalid=2829, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:06:49,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-07-13 20:06:49,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 431. [2021-07-13 20:06:49,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.1372093023255814) internal successors, (919), 430 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:49,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 919 transitions. [2021-07-13 20:06:49,798 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 919 transitions. Word has length 29 [2021-07-13 20:06:49,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:49,798 INFO L482 AbstractCegarLoop]: Abstraction has 431 states and 919 transitions. [2021-07-13 20:06:49,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:49,798 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 919 transitions. [2021-07-13 20:06:49,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:06:49,799 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:49,799 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:49,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:50,000 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:50,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:50,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1614463413, now seen corresponding path program 64 times [2021-07-13 20:06:50,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:50,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537903432] [2021-07-13 20:06:50,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:50,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:50,241 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:50,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:50,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537903432] [2021-07-13 20:06:50,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537903432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:50,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182560926] [2021-07-13 20:06:50,241 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 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 20:06:50,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:06:50,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:50,263 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:06:50,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:50,600 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:50,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182560926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:50,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:50,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-07-13 20:06:50,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577464111] [2021-07-13 20:06:50,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:06:50,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:50,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:06:50,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:06:50,602 INFO L87 Difference]: Start difference. First operand 431 states and 919 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:51,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:51,983 INFO L93 Difference]: Finished difference Result 661 states and 1333 transitions. [2021-07-13 20:06:51,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:06:51,983 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:06:51,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:51,984 INFO L225 Difference]: With dead ends: 661 [2021-07-13 20:06:51,984 INFO L226 Difference]: Without dead ends: 624 [2021-07-13 20:06:51,985 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 1442.7ms TimeCoverageRelationStatistics Valid=535, Invalid=3755, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:06:51,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-07-13 20:06:51,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 362. [2021-07-13 20:06:51,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.155124653739612) internal successors, (778), 361 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:51,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 778 transitions. [2021-07-13 20:06:51,989 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 778 transitions. Word has length 29 [2021-07-13 20:06:51,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:51,989 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 778 transitions. [2021-07-13 20:06:51,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:51,989 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 778 transitions. [2021-07-13 20:06:51,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:06:51,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:51,990 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:52,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:52,202 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:52,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:52,202 INFO L82 PathProgramCache]: Analyzing trace with hash -184540877, now seen corresponding path program 65 times [2021-07-13 20:06:52,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:52,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141629034] [2021-07-13 20:06:52,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:52,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:52,344 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:52,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:52,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141629034] [2021-07-13 20:06:52,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141629034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:52,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871297757] [2021-07-13 20:06:52,345 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:06:52,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:06:52,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:52,369 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 20:06:52,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:52,692 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:52,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871297757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:52,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:52,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-07-13 20:06:52,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596848374] [2021-07-13 20:06:52,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:06:52,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:52,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:06:52,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:06:52,693 INFO L87 Difference]: Start difference. First operand 362 states and 778 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:54,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:54,130 INFO L93 Difference]: Finished difference Result 586 states and 1201 transitions. [2021-07-13 20:06:54,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:06:54,130 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:06:54,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:54,131 INFO L225 Difference]: With dead ends: 586 [2021-07-13 20:06:54,131 INFO L226 Difference]: Without dead ends: 559 [2021-07-13 20:06:54,131 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1754 ImplicationChecksByTransitivity, 1404.3ms TimeCoverageRelationStatistics Valid=767, Invalid=4783, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:06:54,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-07-13 20:06:54,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 194. [2021-07-13 20:06:54,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.051813471502591) internal successors, (396), 193 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:54,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 396 transitions. [2021-07-13 20:06:54,135 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 396 transitions. Word has length 29 [2021-07-13 20:06:54,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:54,135 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 396 transitions. [2021-07-13 20:06:54,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:54,135 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 396 transitions. [2021-07-13 20:06:54,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:06:54,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:54,135 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:54,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-07-13 20:06:54,351 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:54,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:54,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1808436383, now seen corresponding path program 66 times [2021-07-13 20:06:54,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:54,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707062861] [2021-07-13 20:06:54,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:54,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:54,570 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:54,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:54,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707062861] [2021-07-13 20:06:54,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707062861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:54,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709623823] [2021-07-13 20:06:54,571 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 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 20:06:54,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:06:54,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:54,596 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 20:06:54,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:54,985 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:54,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709623823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:54,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:54,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-13 20:06:54,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617325105] [2021-07-13 20:06:54,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:06:54,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:54,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:06:54,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:06:54,986 INFO L87 Difference]: Start difference. First operand 194 states and 396 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 20:06:56,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:56,411 INFO L93 Difference]: Finished difference Result 469 states and 906 transitions. [2021-07-13 20:06:56,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:06:56,411 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 31 [2021-07-13 20:06:56,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:56,412 INFO L225 Difference]: With dead ends: 469 [2021-07-13 20:06:56,412 INFO L226 Difference]: Without dead ends: 414 [2021-07-13 20:06:56,412 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1645 ImplicationChecksByTransitivity, 1548.4ms TimeCoverageRelationStatistics Valid=731, Invalid=4969, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 20:06:56,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-07-13 20:06:56,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 248. [2021-07-13 20:06:56,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.1214574898785425) internal successors, (524), 247 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:56,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 524 transitions. [2021-07-13 20:06:56,416 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 524 transitions. Word has length 31 [2021-07-13 20:06:56,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:56,416 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 524 transitions. [2021-07-13 20:06:56,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 20:06:56,416 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 524 transitions. [2021-07-13 20:06:56,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:06:56,416 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:56,417 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:56,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-13 20:06:56,617 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:56,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:56,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1037382439, now seen corresponding path program 67 times [2021-07-13 20:06:56,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:56,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510205369] [2021-07-13 20:06:56,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:56,818 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:56,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:56,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510205369] [2021-07-13 20:06:56,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510205369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:56,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798788417] [2021-07-13 20:06:56,819 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 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 20:06:56,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:56,840 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:06:56,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:57,133 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:57,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798788417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:57,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:57,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:06:57,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864818267] [2021-07-13 20:06:57,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:06:57,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:57,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:06:57,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:06:57,134 INFO L87 Difference]: Start difference. First operand 248 states and 524 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 20:06:58,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:58,711 INFO L93 Difference]: Finished difference Result 489 states and 939 transitions. [2021-07-13 20:06:58,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 20:06:58,712 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 31 [2021-07-13 20:06:58,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:58,713 INFO L225 Difference]: With dead ends: 489 [2021-07-13 20:06:58,713 INFO L226 Difference]: Without dead ends: 445 [2021-07-13 20:06:58,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1870 ImplicationChecksByTransitivity, 1528.6ms TimeCoverageRelationStatistics Valid=806, Invalid=5514, Unknown=0, NotChecked=0, Total=6320 [2021-07-13 20:06:58,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-07-13 20:06:58,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 250. [2021-07-13 20:06:58,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.1204819277108435) internal successors, (528), 249 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:58,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 528 transitions. [2021-07-13 20:06:58,716 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 528 transitions. Word has length 31 [2021-07-13 20:06:58,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:58,717 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 528 transitions. [2021-07-13 20:06:58,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 20:06:58,717 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 528 transitions. [2021-07-13 20:06:58,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:06:58,717 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:58,717 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:58,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:58,918 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:58,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:58,918 INFO L82 PathProgramCache]: Analyzing trace with hash 2133425259, now seen corresponding path program 68 times [2021-07-13 20:06:58,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:58,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799204327] [2021-07-13 20:06:58,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:58,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:59,113 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:59,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:59,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799204327] [2021-07-13 20:06:59,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799204327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:59,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296896377] [2021-07-13 20:06:59,113 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 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 20:06:59,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:06:59,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:59,136 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:06:59,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:59,446 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:59,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296896377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:59,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:59,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:06:59,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16170761] [2021-07-13 20:06:59,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:06:59,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:59,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:06:59,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:06:59,447 INFO L87 Difference]: Start difference. First operand 250 states and 528 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 20:07:01,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:01,148 INFO L93 Difference]: Finished difference Result 487 states and 937 transitions. [2021-07-13 20:07:01,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:07:01,152 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 31 [2021-07-13 20:07:01,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:01,152 INFO L225 Difference]: With dead ends: 487 [2021-07-13 20:07:01,153 INFO L226 Difference]: Without dead ends: 449 [2021-07-13 20:07:01,153 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 1661.3ms TimeCoverageRelationStatistics Valid=903, Invalid=6237, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:07:01,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-07-13 20:07:01,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 252. [2021-07-13 20:07:01,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.1195219123505975) internal successors, (532), 251 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:01,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 532 transitions. [2021-07-13 20:07:01,156 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 532 transitions. Word has length 31 [2021-07-13 20:07:01,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:01,156 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 532 transitions. [2021-07-13 20:07:01,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 20:07:01,156 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 532 transitions. [2021-07-13 20:07:01,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:07:01,157 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:01,157 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:01,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:01,358 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:01,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:01,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1329117521, now seen corresponding path program 69 times [2021-07-13 20:07:01,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:01,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827033547] [2021-07-13 20:07:01,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:01,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:01,596 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:01,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:01,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827033547] [2021-07-13 20:07:01,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827033547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:01,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134351338] [2021-07-13 20:07:01,596 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 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 20:07:01,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:07:01,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:01,646 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:07:01,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:01,983 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:01,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134351338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:01,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:01,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:07:01,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955458374] [2021-07-13 20:07:01,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:07:01,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:01,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:07:01,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:07:01,984 INFO L87 Difference]: Start difference. First operand 252 states and 532 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 20:07:03,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:03,961 INFO L93 Difference]: Finished difference Result 532 states and 1020 transitions. [2021-07-13 20:07:03,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-13 20:07:03,961 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 31 [2021-07-13 20:07:03,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:03,962 INFO L225 Difference]: With dead ends: 532 [2021-07-13 20:07:03,962 INFO L226 Difference]: Without dead ends: 487 [2021-07-13 20:07:03,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2360 ImplicationChecksByTransitivity, 1937.4ms TimeCoverageRelationStatistics Valid=1015, Invalid=6817, Unknown=0, NotChecked=0, Total=7832 [2021-07-13 20:07:03,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-07-13 20:07:03,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 255. [2021-07-13 20:07:03,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.125984251968504) internal successors, (540), 254 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:03,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 540 transitions. [2021-07-13 20:07:03,966 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 540 transitions. Word has length 31 [2021-07-13 20:07:03,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:03,966 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 540 transitions. [2021-07-13 20:07:03,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 20:07:03,966 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 540 transitions. [2021-07-13 20:07:03,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:07:03,966 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:03,966 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:04,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:04,167 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:04,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:04,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1700921915, now seen corresponding path program 70 times [2021-07-13 20:07:04,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:04,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109356650] [2021-07-13 20:07:04,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:04,404 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:04,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:04,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109356650] [2021-07-13 20:07:04,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109356650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:04,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783959045] [2021-07-13 20:07:04,405 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 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 20:07:04,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:07:04,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:04,426 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:07:04,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:04,757 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:04,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783959045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:04,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:04,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:07:04,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484623289] [2021-07-13 20:07:04,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:07:04,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:04,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:07:04,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:07:04,758 INFO L87 Difference]: Start difference. First operand 255 states and 540 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 20:07:06,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:06,566 INFO L93 Difference]: Finished difference Result 465 states and 897 transitions. [2021-07-13 20:07:06,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:07:06,566 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 31 [2021-07-13 20:07:06,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:06,567 INFO L225 Difference]: With dead ends: 465 [2021-07-13 20:07:06,567 INFO L226 Difference]: Without dead ends: 438 [2021-07-13 20:07:06,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1944 ImplicationChecksByTransitivity, 1725.9ms TimeCoverageRelationStatistics Valid=936, Invalid=5706, Unknown=0, NotChecked=0, Total=6642 [2021-07-13 20:07:06,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-07-13 20:07:06,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 255. [2021-07-13 20:07:06,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.125984251968504) internal successors, (540), 254 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:06,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 540 transitions. [2021-07-13 20:07:06,571 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 540 transitions. Word has length 31 [2021-07-13 20:07:06,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:06,571 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 540 transitions. [2021-07-13 20:07:06,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 20:07:06,571 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 540 transitions. [2021-07-13 20:07:06,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:07:06,571 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:06,571 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:06,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-07-13 20:07:06,772 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:06,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:06,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1287765489, now seen corresponding path program 71 times [2021-07-13 20:07:06,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:06,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728385455] [2021-07-13 20:07:06,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:06,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:06,989 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:06,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:06,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728385455] [2021-07-13 20:07:06,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728385455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:06,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985022355] [2021-07-13 20:07:06,989 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 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 20:07:07,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:07:07,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:07,032 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:07:07,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:07,328 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:07,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985022355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:07,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:07,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:07:07,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698014811] [2021-07-13 20:07:07,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:07:07,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:07,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:07:07,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:07:07,332 INFO L87 Difference]: Start difference. First operand 255 states and 540 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 20:07:08,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:08,926 INFO L93 Difference]: Finished difference Result 465 states and 901 transitions. [2021-07-13 20:07:08,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-13 20:07:08,926 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 31 [2021-07-13 20:07:08,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:08,927 INFO L225 Difference]: With dead ends: 465 [2021-07-13 20:07:08,927 INFO L226 Difference]: Without dead ends: 427 [2021-07-13 20:07:08,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 1531.9ms TimeCoverageRelationStatistics Valid=752, Invalid=5568, Unknown=0, NotChecked=0, Total=6320 [2021-07-13 20:07:08,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-07-13 20:07:08,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 265. [2021-07-13 20:07:08,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.121212121212121) internal successors, (560), 264 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:08,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 560 transitions. [2021-07-13 20:07:08,931 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 560 transitions. Word has length 31 [2021-07-13 20:07:08,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:08,931 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 560 transitions. [2021-07-13 20:07:08,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 20:07:08,931 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 560 transitions. [2021-07-13 20:07:08,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:07:08,931 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:08,931 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:09,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:09,135 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:09,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:09,135 INFO L82 PathProgramCache]: Analyzing trace with hash 2120190005, now seen corresponding path program 72 times [2021-07-13 20:07:09,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:09,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483028239] [2021-07-13 20:07:09,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:09,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:09,395 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:09,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:09,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483028239] [2021-07-13 20:07:09,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483028239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:09,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032432172] [2021-07-13 20:07:09,395 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 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 20:07:09,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:07:09,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:09,420 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:07:09,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:09,714 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:09,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032432172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:09,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:09,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:07:09,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721932139] [2021-07-13 20:07:09,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:07:09,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:09,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:07:09,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:07:09,715 INFO L87 Difference]: Start difference. First operand 265 states and 560 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 20:07:11,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:11,425 INFO L93 Difference]: Finished difference Result 518 states and 999 transitions. [2021-07-13 20:07:11,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:07:11,426 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 31 [2021-07-13 20:07:11,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:11,426 INFO L225 Difference]: With dead ends: 518 [2021-07-13 20:07:11,427 INFO L226 Difference]: Without dead ends: 473 [2021-07-13 20:07:11,427 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2091 ImplicationChecksByTransitivity, 1745.7ms TimeCoverageRelationStatistics Valid=876, Invalid=6096, Unknown=0, NotChecked=0, Total=6972 [2021-07-13 20:07:11,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-07-13 20:07:11,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 267. [2021-07-13 20:07:11,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.1240601503759398) internal successors, (565), 266 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:11,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 565 transitions. [2021-07-13 20:07:11,430 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 565 transitions. Word has length 31 [2021-07-13 20:07:11,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:11,431 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 565 transitions. [2021-07-13 20:07:11,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 20:07:11,431 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 565 transitions. [2021-07-13 20:07:11,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:07:11,431 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:11,431 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:11,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:11,632 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:11,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:11,632 INFO L82 PathProgramCache]: Analyzing trace with hash 855262145, now seen corresponding path program 73 times [2021-07-13 20:07:11,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:11,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297423383] [2021-07-13 20:07:11,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:11,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:11,865 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:11,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:11,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297423383] [2021-07-13 20:07:11,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297423383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:11,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533833793] [2021-07-13 20:07:11,865 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 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 20:07:11,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:11,887 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:07:11,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:12,183 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:12,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533833793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:12,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:12,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:07:12,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580064722] [2021-07-13 20:07:12,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:07:12,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:12,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:07:12,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:07:12,185 INFO L87 Difference]: Start difference. First operand 267 states and 565 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 20:07:13,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:13,737 INFO L93 Difference]: Finished difference Result 448 states and 878 transitions. [2021-07-13 20:07:13,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:07:13,738 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 31 [2021-07-13 20:07:13,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:13,738 INFO L225 Difference]: With dead ends: 448 [2021-07-13 20:07:13,739 INFO L226 Difference]: Without dead ends: 428 [2021-07-13 20:07:13,739 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 1585.7ms TimeCoverageRelationStatistics Valid=808, Invalid=5044, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 20:07:13,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-07-13 20:07:13,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 263. [2021-07-13 20:07:13,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.1068702290076335) internal successors, (552), 262 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:13,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 552 transitions. [2021-07-13 20:07:13,742 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 552 transitions. Word has length 31 [2021-07-13 20:07:13,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:13,742 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 552 transitions. [2021-07-13 20:07:13,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 20:07:13,742 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 552 transitions. [2021-07-13 20:07:13,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:07:13,743 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:13,743 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:13,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:13,960 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:13,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:13,960 INFO L82 PathProgramCache]: Analyzing trace with hash 389420273, now seen corresponding path program 74 times [2021-07-13 20:07:13,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:13,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279762127] [2021-07-13 20:07:13,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:13,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:14,134 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:14,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:14,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279762127] [2021-07-13 20:07:14,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279762127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:14,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120796815] [2021-07-13 20:07:14,135 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 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 20:07:14,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:07:14,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:14,159 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:07:14,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:14,463 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:14,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120796815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:14,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:14,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:07:14,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989312611] [2021-07-13 20:07:14,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:07:14,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:14,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:07:14,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:07:14,464 INFO L87 Difference]: Start difference. First operand 263 states and 552 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 20:07:16,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:16,572 INFO L93 Difference]: Finished difference Result 529 states and 1039 transitions. [2021-07-13 20:07:16,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-13 20:07:16,573 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 31 [2021-07-13 20:07:16,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:16,574 INFO L225 Difference]: With dead ends: 529 [2021-07-13 20:07:16,574 INFO L226 Difference]: Without dead ends: 481 [2021-07-13 20:07:16,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2575 ImplicationChecksByTransitivity, 1942.7ms TimeCoverageRelationStatistics Valid=963, Invalid=7047, Unknown=0, NotChecked=0, Total=8010 [2021-07-13 20:07:16,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-07-13 20:07:16,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 276. [2021-07-13 20:07:16,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.1163636363636362) internal successors, (582), 275 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:16,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 582 transitions. [2021-07-13 20:07:16,577 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 582 transitions. Word has length 31 [2021-07-13 20:07:16,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:16,578 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 582 transitions. [2021-07-13 20:07:16,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 20:07:16,578 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 582 transitions. [2021-07-13 20:07:16,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:07:16,578 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:16,578 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:16,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-07-13 20:07:16,779 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:16,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:16,779 INFO L82 PathProgramCache]: Analyzing trace with hash -875507587, now seen corresponding path program 75 times [2021-07-13 20:07:16,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:16,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000633452] [2021-07-13 20:07:16,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:16,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:16,962 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:16,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:16,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000633452] [2021-07-13 20:07:16,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000633452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:16,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518077645] [2021-07-13 20:07:16,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:07:16,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:07:16,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:16,985 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 20:07:16,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:17,303 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:17,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518077645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:17,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:17,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:07:17,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223568171] [2021-07-13 20:07:17,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:07:17,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:17,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:07:17,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:07:17,304 INFO L87 Difference]: Start difference. First operand 276 states and 582 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 20:07:19,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:19,194 INFO L93 Difference]: Finished difference Result 518 states and 1018 transitions. [2021-07-13 20:07:19,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:07:19,194 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 31 [2021-07-13 20:07:19,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:19,195 INFO L225 Difference]: With dead ends: 518 [2021-07-13 20:07:19,195 INFO L226 Difference]: Without dead ends: 484 [2021-07-13 20:07:19,195 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 1795.4ms TimeCoverageRelationStatistics Valid=909, Invalid=6063, Unknown=0, NotChecked=0, Total=6972 [2021-07-13 20:07:19,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-07-13 20:07:19,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 273. [2021-07-13 20:07:19,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.099264705882353) internal successors, (571), 272 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:19,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 571 transitions. [2021-07-13 20:07:19,199 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 571 transitions. Word has length 31 [2021-07-13 20:07:19,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:19,199 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 571 transitions. [2021-07-13 20:07:19,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 20:07:19,199 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 571 transitions. [2021-07-13 20:07:19,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:07:19,199 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:19,199 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:19,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:19,416 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:19,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:19,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1413332923, now seen corresponding path program 76 times [2021-07-13 20:07:19,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:19,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230676631] [2021-07-13 20:07:19,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:19,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:19,619 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:19,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:19,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230676631] [2021-07-13 20:07:19,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230676631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:19,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424091573] [2021-07-13 20:07:19,620 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 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 20:07:19,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:07:19,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:19,641 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:07:19,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:20,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424091573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:20,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:20,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2021-07-13 20:07:20,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27567401] [2021-07-13 20:07:20,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:07:20,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:20,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:07:20,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:07:20,069 INFO L87 Difference]: Start difference. First operand 273 states and 571 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:22,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:22,203 INFO L93 Difference]: Finished difference Result 473 states and 960 transitions. [2021-07-13 20:07:22,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:07:22,203 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:07:22,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:22,204 INFO L225 Difference]: With dead ends: 473 [2021-07-13 20:07:22,204 INFO L226 Difference]: Without dead ends: 447 [2021-07-13 20:07:22,205 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1547 ImplicationChecksByTransitivity, 2073.4ms TimeCoverageRelationStatistics Valid=655, Invalid=4315, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:07:22,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-07-13 20:07:22,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 303. [2021-07-13 20:07:22,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.096026490066225) internal successors, (633), 302 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:22,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 633 transitions. [2021-07-13 20:07:22,208 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 633 transitions. Word has length 31 [2021-07-13 20:07:22,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:22,208 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 633 transitions. [2021-07-13 20:07:22,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:22,208 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 633 transitions. [2021-07-13 20:07:22,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:07:22,209 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:22,209 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:22,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-07-13 20:07:22,425 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:22,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:22,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1311105745, now seen corresponding path program 77 times [2021-07-13 20:07:22,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:22,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028491220] [2021-07-13 20:07:22,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:22,468 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:07:22,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:22,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028491220] [2021-07-13 20:07:22,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028491220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:22,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342775258] [2021-07-13 20:07:22,469 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 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 20:07:22,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:07:22,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:22,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:07:22,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:22,539 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:07:22,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342775258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:22,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:22,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 20:07:22,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468668209] [2021-07-13 20:07:22,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:07:22,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:22,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:07:22,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:07:22,540 INFO L87 Difference]: Start difference. First operand 303 states and 633 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 20:07:22,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:22,609 INFO L93 Difference]: Finished difference Result 483 states and 979 transitions. [2021-07-13 20:07:22,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:07:22,610 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 33 [2021-07-13 20:07:22,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:22,610 INFO L225 Difference]: With dead ends: 483 [2021-07-13 20:07:22,610 INFO L226 Difference]: Without dead ends: 444 [2021-07-13 20:07:22,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:07:22,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-07-13 20:07:22,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 310. [2021-07-13 20:07:22,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.0938511326860842) internal successors, (647), 309 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:22,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 647 transitions. [2021-07-13 20:07:22,614 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 647 transitions. Word has length 33 [2021-07-13 20:07:22,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:22,614 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 647 transitions. [2021-07-13 20:07:22,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 20:07:22,614 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 647 transitions. [2021-07-13 20:07:22,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:07:22,615 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:22,615 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:22,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-13 20:07:22,815 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:22,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:22,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1845552953, now seen corresponding path program 78 times [2021-07-13 20:07:22,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:22,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859856952] [2021-07-13 20:07:22,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:22,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:23,065 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:23,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:23,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859856952] [2021-07-13 20:07:23,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859856952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:23,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160841415] [2021-07-13 20:07:23,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:07:23,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:07:23,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:23,104 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-13 20:07:23,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:23,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160841415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:23,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:23,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-07-13 20:07:23,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423978127] [2021-07-13 20:07:23,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:07:23,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:23,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:07:23,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:07:23,516 INFO L87 Difference]: Start difference. First operand 310 states and 647 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:28,336 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-07-13 20:07:28,596 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-07-13 20:07:30,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:30,566 INFO L93 Difference]: Finished difference Result 1038 states and 2060 transitions. [2021-07-13 20:07:30,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-07-13 20:07:30,566 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:07:30,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:30,568 INFO L225 Difference]: With dead ends: 1038 [2021-07-13 20:07:30,568 INFO L226 Difference]: Without dead ends: 976 [2021-07-13 20:07:30,569 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7650 ImplicationChecksByTransitivity, 6297.3ms TimeCoverageRelationStatistics Valid=2584, Invalid=18008, Unknown=0, NotChecked=0, Total=20592 [2021-07-13 20:07:30,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-07-13 20:07:30,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 386. [2021-07-13 20:07:30,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.109090909090909) internal successors, (812), 385 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:30,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 812 transitions. [2021-07-13 20:07:30,575 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 812 transitions. Word has length 33 [2021-07-13 20:07:30,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:30,575 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 812 transitions. [2021-07-13 20:07:30,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:30,575 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 812 transitions. [2021-07-13 20:07:30,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:07:30,575 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:30,575 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:30,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-13 20:07:30,776 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:30,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:30,776 INFO L82 PathProgramCache]: Analyzing trace with hash -360118039, now seen corresponding path program 79 times [2021-07-13 20:07:30,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:30,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525758159] [2021-07-13 20:07:30,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:30,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:07:30,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:30,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525758159] [2021-07-13 20:07:30,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525758159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:30,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124233938] [2021-07-13 20:07:30,971 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 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 20:07:31,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:31,006 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 20:07:31,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:31,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124233938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:31,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:31,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-13 20:07:31,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154102190] [2021-07-13 20:07:31,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:07:31,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:31,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:07:31,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:07:31,387 INFO L87 Difference]: Start difference. First operand 386 states and 812 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:32,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:32,623 INFO L93 Difference]: Finished difference Result 583 states and 1174 transitions. [2021-07-13 20:07:32,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:07:32,624 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:07:32,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:32,625 INFO L225 Difference]: With dead ends: 583 [2021-07-13 20:07:32,625 INFO L226 Difference]: Without dead ends: 538 [2021-07-13 20:07:32,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 1279.0ms TimeCoverageRelationStatistics Valid=418, Invalid=4004, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:07:32,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-07-13 20:07:32,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 349. [2021-07-13 20:07:32,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.103448275862069) internal successors, (732), 348 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:32,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 732 transitions. [2021-07-13 20:07:32,629 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 732 transitions. Word has length 33 [2021-07-13 20:07:32,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:32,629 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 732 transitions. [2021-07-13 20:07:32,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:32,629 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 732 transitions. [2021-07-13 20:07:32,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:07:32,630 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:32,630 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:32,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:32,831 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:32,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:32,831 INFO L82 PathProgramCache]: Analyzing trace with hash 569511771, now seen corresponding path program 80 times [2021-07-13 20:07:32,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:32,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533270090] [2021-07-13 20:07:32,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:32,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:33,062 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:33,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:33,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533270090] [2021-07-13 20:07:33,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533270090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:33,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876477265] [2021-07-13 20:07:33,063 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 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 20:07:33,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:07:33,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:33,087 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:07:33,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:33,443 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:33,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876477265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:33,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:33,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:07:33,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295369249] [2021-07-13 20:07:33,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:07:33,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:33,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:07:33,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:07:33,444 INFO L87 Difference]: Start difference. First operand 349 states and 732 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 20:07:35,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:35,218 INFO L93 Difference]: Finished difference Result 782 states and 1584 transitions. [2021-07-13 20:07:35,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:07:35,219 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 35 [2021-07-13 20:07:35,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:35,220 INFO L225 Difference]: With dead ends: 782 [2021-07-13 20:07:35,220 INFO L226 Difference]: Without dead ends: 721 [2021-07-13 20:07:35,221 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2050 ImplicationChecksByTransitivity, 1738.4ms TimeCoverageRelationStatistics Valid=913, Invalid=6227, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:07:35,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-07-13 20:07:35,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 461. [2021-07-13 20:07:35,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 2.1869565217391305) internal successors, (1006), 460 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:35,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1006 transitions. [2021-07-13 20:07:35,227 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1006 transitions. Word has length 35 [2021-07-13 20:07:35,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:35,227 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1006 transitions. [2021-07-13 20:07:35,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 20:07:35,227 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1006 transitions. [2021-07-13 20:07:35,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:07:35,227 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:35,227 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:35,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:35,441 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:35,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:35,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1678953501, now seen corresponding path program 81 times [2021-07-13 20:07:35,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:35,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897425658] [2021-07-13 20:07:35,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:35,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:35,690 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:35,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:35,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897425658] [2021-07-13 20:07:35,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897425658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:35,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872534616] [2021-07-13 20:07:35,690 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 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 20:07:35,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:07:35,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:35,716 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:07:35,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:36,074 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:36,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872534616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:36,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:36,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:07:36,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203014290] [2021-07-13 20:07:36,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:07:36,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:36,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:07:36,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:07:36,075 INFO L87 Difference]: Start difference. First operand 461 states and 1006 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 20:07:37,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:37,882 INFO L93 Difference]: Finished difference Result 808 states and 1627 transitions. [2021-07-13 20:07:37,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-13 20:07:37,882 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 35 [2021-07-13 20:07:37,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:37,883 INFO L225 Difference]: With dead ends: 808 [2021-07-13 20:07:37,883 INFO L226 Difference]: Without dead ends: 758 [2021-07-13 20:07:37,884 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2375 ImplicationChecksByTransitivity, 1829.6ms TimeCoverageRelationStatistics Valid=997, Invalid=7013, Unknown=0, NotChecked=0, Total=8010 [2021-07-13 20:07:37,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-07-13 20:07:37,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 463. [2021-07-13 20:07:37,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.186147186147186) internal successors, (1010), 462 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:37,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1010 transitions. [2021-07-13 20:07:37,890 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1010 transitions. Word has length 35 [2021-07-13 20:07:37,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:37,890 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1010 transitions. [2021-07-13 20:07:37,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 20:07:37,890 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1010 transitions. [2021-07-13 20:07:37,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:07:37,890 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:37,890 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:38,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:38,109 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:38,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:38,109 INFO L82 PathProgramCache]: Analyzing trace with hash -648791001, now seen corresponding path program 82 times [2021-07-13 20:07:38,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:38,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728616631] [2021-07-13 20:07:38,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:38,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:38,345 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:38,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:38,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728616631] [2021-07-13 20:07:38,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728616631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:38,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496217657] [2021-07-13 20:07:38,346 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 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 20:07:38,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:07:38,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:38,370 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:07:38,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:38,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496217657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:38,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:38,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:07:38,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36838636] [2021-07-13 20:07:38,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:07:38,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:38,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:07:38,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:07:38,731 INFO L87 Difference]: Start difference. First operand 463 states and 1010 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 20:07:40,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:40,846 INFO L93 Difference]: Finished difference Result 806 states and 1625 transitions. [2021-07-13 20:07:40,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-13 20:07:40,846 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 35 [2021-07-13 20:07:40,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:40,848 INFO L225 Difference]: With dead ends: 806 [2021-07-13 20:07:40,848 INFO L226 Difference]: Without dead ends: 762 [2021-07-13 20:07:40,848 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2695 ImplicationChecksByTransitivity, 1922.0ms TimeCoverageRelationStatistics Valid=1094, Invalid=7836, Unknown=0, NotChecked=0, Total=8930 [2021-07-13 20:07:40,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-07-13 20:07:40,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 465. [2021-07-13 20:07:40,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.185344827586207) internal successors, (1014), 464 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:40,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1014 transitions. [2021-07-13 20:07:40,854 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1014 transitions. Word has length 35 [2021-07-13 20:07:40,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:40,854 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1014 transitions. [2021-07-13 20:07:40,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 20:07:40,854 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1014 transitions. [2021-07-13 20:07:40,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:07:40,855 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:40,855 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:41,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:41,056 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:41,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:41,057 INFO L82 PathProgramCache]: Analyzing trace with hash 447251819, now seen corresponding path program 83 times [2021-07-13 20:07:41,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:41,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225517476] [2021-07-13 20:07:41,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:41,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:41,285 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:41,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:41,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225517476] [2021-07-13 20:07:41,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225517476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:41,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359183736] [2021-07-13 20:07:41,285 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 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 20:07:41,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:07:41,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:41,310 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:07:41,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:41,667 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:41,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359183736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:41,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:41,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:07:41,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100046684] [2021-07-13 20:07:41,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:07:41,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:41,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:07:41,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:07:41,668 INFO L87 Difference]: Start difference. First operand 465 states and 1014 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 20:07:43,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:43,759 INFO L93 Difference]: Finished difference Result 806 states and 1627 transitions. [2021-07-13 20:07:43,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-07-13 20:07:43,759 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 35 [2021-07-13 20:07:43,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:43,760 INFO L225 Difference]: With dead ends: 806 [2021-07-13 20:07:43,760 INFO L226 Difference]: Without dead ends: 768 [2021-07-13 20:07:43,761 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3034 ImplicationChecksByTransitivity, 2055.9ms TimeCoverageRelationStatistics Valid=1216, Invalid=8684, Unknown=0, NotChecked=0, Total=9900 [2021-07-13 20:07:43,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2021-07-13 20:07:43,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 467. [2021-07-13 20:07:43,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 2.184549356223176) internal successors, (1018), 466 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:43,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1018 transitions. [2021-07-13 20:07:43,766 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1018 transitions. Word has length 35 [2021-07-13 20:07:43,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:43,766 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1018 transitions. [2021-07-13 20:07:43,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 20:07:43,767 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1018 transitions. [2021-07-13 20:07:43,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:07:43,767 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:43,767 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:43,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-07-13 20:07:43,984 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:43,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:43,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1279676335, now seen corresponding path program 84 times [2021-07-13 20:07:43,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:43,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137003837] [2021-07-13 20:07:43,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:44,240 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:44,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:44,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137003837] [2021-07-13 20:07:44,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137003837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:44,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269167234] [2021-07-13 20:07:44,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:44,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:07:44,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:44,268 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-13 20:07:44,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:44,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269167234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:44,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:44,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:07:44,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435527570] [2021-07-13 20:07:44,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:07:44,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:44,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:07:44,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:07:44,756 INFO L87 Difference]: Start difference. First operand 467 states and 1018 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 20:07:47,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:47,962 INFO L93 Difference]: Finished difference Result 865 states and 1736 transitions. [2021-07-13 20:07:47,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-07-13 20:07:47,962 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 35 [2021-07-13 20:07:47,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:47,963 INFO L225 Difference]: With dead ends: 865 [2021-07-13 20:07:47,963 INFO L226 Difference]: Without dead ends: 820 [2021-07-13 20:07:47,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3709 ImplicationChecksByTransitivity, 2922.7ms TimeCoverageRelationStatistics Valid=1448, Invalid=10984, Unknown=0, NotChecked=0, Total=12432 [2021-07-13 20:07:47,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-07-13 20:07:47,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 470. [2021-07-13 20:07:47,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.1876332622601278) internal successors, (1026), 469 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:47,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1026 transitions. [2021-07-13 20:07:47,970 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1026 transitions. Word has length 35 [2021-07-13 20:07:47,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:47,970 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1026 transitions. [2021-07-13 20:07:47,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 20:07:47,970 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1026 transitions. [2021-07-13 20:07:47,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:07:47,970 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:47,971 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:48,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-13 20:07:48,171 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:48,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:48,171 INFO L82 PathProgramCache]: Analyzing trace with hash 14748475, now seen corresponding path program 85 times [2021-07-13 20:07:48,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:48,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554815601] [2021-07-13 20:07:48,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:48,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:48,454 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:48,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:48,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554815601] [2021-07-13 20:07:48,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554815601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:48,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966187324] [2021-07-13 20:07:48,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:48,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:48,478 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:07:48,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:48,847 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:48,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966187324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:48,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:48,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:07:48,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789006669] [2021-07-13 20:07:48,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:07:48,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:48,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:07:48,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:07:48,848 INFO L87 Difference]: Start difference. First operand 470 states and 1026 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 20:07:51,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:51,005 INFO L93 Difference]: Finished difference Result 746 states and 1501 transitions. [2021-07-13 20:07:51,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-13 20:07:51,006 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 35 [2021-07-13 20:07:51,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:51,007 INFO L225 Difference]: With dead ends: 746 [2021-07-13 20:07:51,007 INFO L226 Difference]: Without dead ends: 719 [2021-07-13 20:07:51,007 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2714 ImplicationChecksByTransitivity, 2138.9ms TimeCoverageRelationStatistics Valid=1253, Invalid=7867, Unknown=0, NotChecked=0, Total=9120 [2021-07-13 20:07:51,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-07-13 20:07:51,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 470. [2021-07-13 20:07:51,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.1876332622601278) internal successors, (1026), 469 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:51,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1026 transitions. [2021-07-13 20:07:51,013 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1026 transitions. Word has length 35 [2021-07-13 20:07:51,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:51,013 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1026 transitions. [2021-07-13 20:07:51,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 20:07:51,013 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1026 transitions. [2021-07-13 20:07:51,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:07:51,013 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:51,014 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:51,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-13 20:07:51,214 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:51,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:51,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1579011027, now seen corresponding path program 86 times [2021-07-13 20:07:51,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:51,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194258419] [2021-07-13 20:07:51,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:51,454 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:51,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:51,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194258419] [2021-07-13 20:07:51,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194258419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:51,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343141782] [2021-07-13 20:07:51,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:51,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:07:51,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:51,480 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:07:51,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:51,842 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:51,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343141782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:51,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:51,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:07:51,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942515796] [2021-07-13 20:07:51,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:07:51,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:51,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:07:51,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:07:51,843 INFO L87 Difference]: Start difference. First operand 470 states and 1026 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 20:07:53,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:53,649 INFO L93 Difference]: Finished difference Result 776 states and 1568 transitions. [2021-07-13 20:07:53,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:07:53,650 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 35 [2021-07-13 20:07:53,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:53,650 INFO L225 Difference]: With dead ends: 776 [2021-07-13 20:07:53,650 INFO L226 Difference]: Without dead ends: 732 [2021-07-13 20:07:53,651 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2404 ImplicationChecksByTransitivity, 1800.1ms TimeCoverageRelationStatistics Valid=930, Invalid=7080, Unknown=0, NotChecked=0, Total=8010 [2021-07-13 20:07:53,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-07-13 20:07:53,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 476. [2021-07-13 20:07:53,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.185263157894737) internal successors, (1038), 475 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:53,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1038 transitions. [2021-07-13 20:07:53,656 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1038 transitions. Word has length 35 [2021-07-13 20:07:53,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:53,657 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1038 transitions. [2021-07-13 20:07:53,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 20:07:53,657 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1038 transitions. [2021-07-13 20:07:53,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:07:53,657 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:53,657 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:53,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-13 20:07:53,861 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:53,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:53,861 INFO L82 PathProgramCache]: Analyzing trace with hash -482968207, now seen corresponding path program 87 times [2021-07-13 20:07:53,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:53,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321663041] [2021-07-13 20:07:53,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:54,096 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:54,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:54,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321663041] [2021-07-13 20:07:54,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321663041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:54,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245746541] [2021-07-13 20:07:54,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:07:54,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:07:54,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:54,128 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:07:54,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:54,653 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:54,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245746541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:54,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:54,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:07:54,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6908164] [2021-07-13 20:07:54,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:07:54,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:54,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:07:54,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:07:54,654 INFO L87 Difference]: Start difference. First operand 476 states and 1038 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 20:07:57,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:57,194 INFO L93 Difference]: Finished difference Result 777 states and 1580 transitions. [2021-07-13 20:07:57,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-13 20:07:57,195 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 35 [2021-07-13 20:07:57,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:57,195 INFO L225 Difference]: With dead ends: 777 [2021-07-13 20:07:57,195 INFO L226 Difference]: Without dead ends: 739 [2021-07-13 20:07:57,196 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2748 ImplicationChecksByTransitivity, 2450.4ms TimeCoverageRelationStatistics Valid=1089, Invalid=8613, Unknown=0, NotChecked=0, Total=9702 [2021-07-13 20:07:57,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-07-13 20:07:57,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 482. [2021-07-13 20:07:57,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.191268191268191) internal successors, (1054), 481 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:57,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1054 transitions. [2021-07-13 20:07:57,202 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1054 transitions. Word has length 35 [2021-07-13 20:07:57,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:57,202 INFO L482 AbstractCegarLoop]: Abstraction has 482 states and 1054 transitions. [2021-07-13 20:07:57,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 20:07:57,202 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1054 transitions. [2021-07-13 20:07:57,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:07:57,202 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:57,203 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:57,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-07-13 20:07:57,403 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:57,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:57,403 INFO L82 PathProgramCache]: Analyzing trace with hash 349456309, now seen corresponding path program 88 times [2021-07-13 20:07:57,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:57,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216550049] [2021-07-13 20:07:57,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:57,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:57,660 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:57,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:57,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216550049] [2021-07-13 20:07:57,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216550049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:57,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294610535] [2021-07-13 20:07:57,660 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 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 20:07:57,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:07:57,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:57,684 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:07:57,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:58,064 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:58,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294610535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:58,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:58,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:07:58,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977356269] [2021-07-13 20:07:58,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:07:58,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:58,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:07:58,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:07:58,065 INFO L87 Difference]: Start difference. First operand 482 states and 1054 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 20:08:00,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:00,311 INFO L93 Difference]: Finished difference Result 849 states and 1716 transitions. [2021-07-13 20:08:00,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-07-13 20:08:00,311 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 35 [2021-07-13 20:08:00,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:00,312 INFO L225 Difference]: With dead ends: 849 [2021-07-13 20:08:00,312 INFO L226 Difference]: Without dead ends: 804 [2021-07-13 20:08:00,312 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2952 ImplicationChecksByTransitivity, 2184.5ms TimeCoverageRelationStatistics Valid=1198, Invalid=8504, Unknown=0, NotChecked=0, Total=9702 [2021-07-13 20:08:00,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-07-13 20:08:00,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 486. [2021-07-13 20:08:00,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 2.195876288659794) internal successors, (1065), 485 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:00,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1065 transitions. [2021-07-13 20:08:00,318 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1065 transitions. Word has length 35 [2021-07-13 20:08:00,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:00,318 INFO L482 AbstractCegarLoop]: Abstraction has 486 states and 1065 transitions. [2021-07-13 20:08:00,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 20:08:00,318 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1065 transitions. [2021-07-13 20:08:00,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:08:00,319 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:00,319 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:00,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:00,533 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:00,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:00,533 INFO L82 PathProgramCache]: Analyzing trace with hash -915471551, now seen corresponding path program 89 times [2021-07-13 20:08:00,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:00,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226365410] [2021-07-13 20:08:00,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:00,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:00,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:00,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226365410] [2021-07-13 20:08:00,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226365410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:00,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904776895] [2021-07-13 20:08:00,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:00,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:08:00,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:00,816 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:08:00,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:01,182 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:01,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904776895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:01,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:01,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:08:01,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072045071] [2021-07-13 20:08:01,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:08:01,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:01,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:08:01,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:08:01,183 INFO L87 Difference]: Start difference. First operand 486 states and 1065 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 20:08:03,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:03,209 INFO L93 Difference]: Finished difference Result 747 states and 1522 transitions. [2021-07-13 20:08:03,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-13 20:08:03,209 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 35 [2021-07-13 20:08:03,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:03,210 INFO L225 Difference]: With dead ends: 747 [2021-07-13 20:08:03,210 INFO L226 Difference]: Without dead ends: 720 [2021-07-13 20:08:03,211 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2494 ImplicationChecksByTransitivity, 2032.2ms TimeCoverageRelationStatistics Valid=1132, Invalid=7240, Unknown=0, NotChecked=0, Total=8372 [2021-07-13 20:08:03,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-07-13 20:08:03,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 388. [2021-07-13 20:08:03,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.13953488372093) internal successors, (828), 387 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:03,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 828 transitions. [2021-07-13 20:08:03,216 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 828 transitions. Word has length 35 [2021-07-13 20:08:03,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:03,216 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 828 transitions. [2021-07-13 20:08:03,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 20:08:03,216 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 828 transitions. [2021-07-13 20:08:03,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:08:03,216 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:03,216 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:03,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:03,417 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:03,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:03,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1600337107, now seen corresponding path program 90 times [2021-07-13 20:08:03,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:03,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156835497] [2021-07-13 20:08:03,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:03,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:03,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:03,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156835497] [2021-07-13 20:08:03,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156835497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:03,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664819639] [2021-07-13 20:08:03,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:03,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:08:03,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:03,675 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-13 20:08:03,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:04,133 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:04,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664819639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:04,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:04,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:08:04,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076453843] [2021-07-13 20:08:04,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:08:04,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:04,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:08:04,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:08:04,134 INFO L87 Difference]: Start difference. First operand 388 states and 828 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 20:08:06,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:06,445 INFO L93 Difference]: Finished difference Result 635 states and 1250 transitions. [2021-07-13 20:08:06,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:08:06,446 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 35 [2021-07-13 20:08:06,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:06,446 INFO L225 Difference]: With dead ends: 635 [2021-07-13 20:08:06,446 INFO L226 Difference]: Without dead ends: 597 [2021-07-13 20:08:06,447 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2768 ImplicationChecksByTransitivity, 2311.7ms TimeCoverageRelationStatistics Valid=1045, Invalid=8461, Unknown=0, NotChecked=0, Total=9506 [2021-07-13 20:08:06,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-07-13 20:08:06,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 392. [2021-07-13 20:08:06,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.1381074168797953) internal successors, (836), 391 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:06,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 836 transitions. [2021-07-13 20:08:06,451 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 836 transitions. Word has length 35 [2021-07-13 20:08:06,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:06,452 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 836 transitions. [2021-07-13 20:08:06,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 20:08:06,452 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 836 transitions. [2021-07-13 20:08:06,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:08:06,452 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:06,452 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:06,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:06,653 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:06,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:06,653 INFO L82 PathProgramCache]: Analyzing trace with hash -767912591, now seen corresponding path program 91 times [2021-07-13 20:08:06,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:06,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021956953] [2021-07-13 20:08:06,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:06,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:06,933 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:06,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:06,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021956953] [2021-07-13 20:08:06,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021956953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:06,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798807436] [2021-07-13 20:08:06,933 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:06,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:06,956 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:08:06,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:07,315 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:07,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798807436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:07,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:07,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:08:07,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849268164] [2021-07-13 20:08:07,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:08:07,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:07,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:08:07,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:08:07,317 INFO L87 Difference]: Start difference. First operand 392 states and 836 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 20:08:09,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:09,459 INFO L93 Difference]: Finished difference Result 700 states and 1368 transitions. [2021-07-13 20:08:09,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-07-13 20:08:09,459 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 35 [2021-07-13 20:08:09,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:09,460 INFO L225 Difference]: With dead ends: 700 [2021-07-13 20:08:09,460 INFO L226 Difference]: Without dead ends: 655 [2021-07-13 20:08:09,461 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3073 ImplicationChecksByTransitivity, 2190.0ms TimeCoverageRelationStatistics Valid=1195, Invalid=8705, Unknown=0, NotChecked=0, Total=9900 [2021-07-13 20:08:09,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-07-13 20:08:09,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 394. [2021-07-13 20:08:09,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.1399491094147582) internal successors, (841), 393 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:09,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 841 transitions. [2021-07-13 20:08:09,465 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 841 transitions. Word has length 35 [2021-07-13 20:08:09,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:09,465 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 841 transitions. [2021-07-13 20:08:09,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 20:08:09,466 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 841 transitions. [2021-07-13 20:08:09,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:08:09,466 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:09,466 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:09,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-07-13 20:08:09,667 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:09,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:09,667 INFO L82 PathProgramCache]: Analyzing trace with hash -2032840451, now seen corresponding path program 92 times [2021-07-13 20:08:09,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:09,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455597365] [2021-07-13 20:08:09,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:09,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:09,935 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:09,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:09,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455597365] [2021-07-13 20:08:09,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455597365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:09,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518513842] [2021-07-13 20:08:09,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:09,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:09,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:09,961 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:08:09,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:10,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518513842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:10,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:10,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:08:10,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253491433] [2021-07-13 20:08:10,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:08:10,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:10,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:08:10,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:08:10,336 INFO L87 Difference]: Start difference. First operand 394 states and 841 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 20:08:12,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:12,371 INFO L93 Difference]: Finished difference Result 618 states and 1227 transitions. [2021-07-13 20:08:12,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-13 20:08:12,371 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 35 [2021-07-13 20:08:12,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:12,372 INFO L225 Difference]: With dead ends: 618 [2021-07-13 20:08:12,372 INFO L226 Difference]: Without dead ends: 598 [2021-07-13 20:08:12,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2534 ImplicationChecksByTransitivity, 2023.0ms TimeCoverageRelationStatistics Valid=1118, Invalid=7254, Unknown=0, NotChecked=0, Total=8372 [2021-07-13 20:08:12,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-07-13 20:08:12,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 382. [2021-07-13 20:08:12,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 2.120734908136483) internal successors, (808), 381 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:12,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 808 transitions. [2021-07-13 20:08:12,377 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 808 transitions. Word has length 35 [2021-07-13 20:08:12,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:12,377 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 808 transitions. [2021-07-13 20:08:12,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 20:08:12,377 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 808 transitions. [2021-07-13 20:08:12,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:08:12,377 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:12,378 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:12,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-07-13 20:08:12,578 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:12,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:12,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1796284973, now seen corresponding path program 93 times [2021-07-13 20:08:12,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:12,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321344198] [2021-07-13 20:08:12,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:12,771 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:12,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:12,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321344198] [2021-07-13 20:08:12,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321344198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:12,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953198814] [2021-07-13 20:08:12,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:12,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:08:12,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:12,800 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 20:08:12,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:13,175 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:13,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953198814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:13,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:13,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:08:13,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022328289] [2021-07-13 20:08:13,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:08:13,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:13,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:08:13,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:08:13,176 INFO L87 Difference]: Start difference. First operand 382 states and 808 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 20:08:15,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:15,966 INFO L93 Difference]: Finished difference Result 714 states and 1421 transitions. [2021-07-13 20:08:15,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-07-13 20:08:15,967 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 35 [2021-07-13 20:08:15,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:15,967 INFO L225 Difference]: With dead ends: 714 [2021-07-13 20:08:15,967 INFO L226 Difference]: Without dead ends: 666 [2021-07-13 20:08:15,968 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4028 ImplicationChecksByTransitivity, 2681.7ms TimeCoverageRelationStatistics Valid=1422, Invalid=10568, Unknown=0, NotChecked=0, Total=11990 [2021-07-13 20:08:15,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-07-13 20:08:15,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 398. [2021-07-13 20:08:15,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.123425692695214) internal successors, (843), 397 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:15,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 843 transitions. [2021-07-13 20:08:15,973 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 843 transitions. Word has length 35 [2021-07-13 20:08:15,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:15,973 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 843 transitions. [2021-07-13 20:08:15,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 20:08:15,973 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 843 transitions. [2021-07-13 20:08:15,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:08:15,973 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:15,974 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:16,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-07-13 20:08:16,174 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:16,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:16,174 INFO L82 PathProgramCache]: Analyzing trace with hash 531357113, now seen corresponding path program 94 times [2021-07-13 20:08:16,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:16,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489626378] [2021-07-13 20:08:16,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:16,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:16,380 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:16,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:16,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489626378] [2021-07-13 20:08:16,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489626378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:16,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380388666] [2021-07-13 20:08:16,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:16,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:08:16,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:16,405 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:08:16,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:16,767 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:16,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380388666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:16,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:16,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 20:08:16,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179350778] [2021-07-13 20:08:16,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:08:16,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:16,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:08:16,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:08:16,768 INFO L87 Difference]: Start difference. First operand 398 states and 843 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 20:08:19,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:19,229 INFO L93 Difference]: Finished difference Result 728 states and 1445 transitions. [2021-07-13 20:08:19,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-07-13 20:08:19,229 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 35 [2021-07-13 20:08:19,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:19,230 INFO L225 Difference]: With dead ends: 728 [2021-07-13 20:08:19,230 INFO L226 Difference]: Without dead ends: 687 [2021-07-13 20:08:19,231 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3098 ImplicationChecksByTransitivity, 2316.5ms TimeCoverageRelationStatistics Valid=1275, Invalid=8427, Unknown=0, NotChecked=0, Total=9702 [2021-07-13 20:08:19,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-07-13 20:08:19,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 365. [2021-07-13 20:08:19,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 2.0851648351648353) internal successors, (759), 364 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:19,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 759 transitions. [2021-07-13 20:08:19,235 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 759 transitions. Word has length 35 [2021-07-13 20:08:19,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:19,235 INFO L482 AbstractCegarLoop]: Abstraction has 365 states and 759 transitions. [2021-07-13 20:08:19,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 20:08:19,235 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 759 transitions. [2021-07-13 20:08:19,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:08:19,236 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:19,236 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:19,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:19,442 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:19,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:19,442 INFO L82 PathProgramCache]: Analyzing trace with hash 850528961, now seen corresponding path program 95 times [2021-07-13 20:08:19,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:19,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837876245] [2021-07-13 20:08:19,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:19,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:19,691 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:19,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:19,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837876245] [2021-07-13 20:08:19,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837876245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:19,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702536043] [2021-07-13 20:08:19,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:19,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:08:19,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:19,734 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:08:19,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:20,288 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:20,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702536043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:20,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:20,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-07-13 20:08:20,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678088562] [2021-07-13 20:08:20,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:08:20,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:20,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:08:20,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:08:20,289 INFO L87 Difference]: Start difference. First operand 365 states and 759 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 20:08:23,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:23,885 INFO L93 Difference]: Finished difference Result 641 states and 1294 transitions. [2021-07-13 20:08:23,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-07-13 20:08:23,886 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 35 [2021-07-13 20:08:23,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:23,887 INFO L225 Difference]: With dead ends: 641 [2021-07-13 20:08:23,887 INFO L226 Difference]: Without dead ends: 608 [2021-07-13 20:08:23,887 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3257 ImplicationChecksByTransitivity, 3367.9ms TimeCoverageRelationStatistics Valid=1181, Invalid=8325, Unknown=0, NotChecked=0, Total=9506 [2021-07-13 20:08:23,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-07-13 20:08:23,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 381. [2021-07-13 20:08:23,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.081578947368421) internal successors, (791), 380 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:23,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 791 transitions. [2021-07-13 20:08:23,896 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 791 transitions. Word has length 35 [2021-07-13 20:08:23,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:23,896 INFO L482 AbstractCegarLoop]: Abstraction has 381 states and 791 transitions. [2021-07-13 20:08:23,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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 20:08:23,896 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 791 transitions. [2021-07-13 20:08:23,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:08:23,896 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:23,896 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:24,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:24,113 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:24,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:24,113 INFO L82 PathProgramCache]: Analyzing trace with hash 72244865, now seen corresponding path program 96 times [2021-07-13 20:08:24,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:24,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571049834] [2021-07-13 20:08:24,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:24,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:24,412 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2021-07-13 20:08:24,538 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:24,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:24,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571049834] [2021-07-13 20:08:24,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571049834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:24,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059123905] [2021-07-13 20:08:24,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:24,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:08:24,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:24,565 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:08:24,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:24,989 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:24,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059123905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:24,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:24,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-07-13 20:08:24,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832737659] [2021-07-13 20:08:24,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:08:24,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:24,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:08:24,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:08:24,990 INFO L87 Difference]: Start difference. First operand 381 states and 791 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:25,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:25,723 INFO L93 Difference]: Finished difference Result 540 states and 1106 transitions. [2021-07-13 20:08:25,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:08:25,723 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 20:08:25,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:25,724 INFO L225 Difference]: With dead ends: 540 [2021-07-13 20:08:25,724 INFO L226 Difference]: Without dead ends: 533 [2021-07-13 20:08:25,724 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 924.3ms TimeCoverageRelationStatistics Valid=138, Invalid=1194, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:08:25,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-07-13 20:08:25,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 385. [2021-07-13 20:08:25,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.0807291666666665) internal successors, (799), 384 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:25,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 799 transitions. [2021-07-13 20:08:25,728 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 799 transitions. Word has length 35 [2021-07-13 20:08:25,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:25,728 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 799 transitions. [2021-07-13 20:08:25,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:25,729 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 799 transitions. [2021-07-13 20:08:25,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:08:25,729 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:25,729 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:25,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-07-13 20:08:25,930 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:25,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:25,930 INFO L82 PathProgramCache]: Analyzing trace with hash 428848235, now seen corresponding path program 97 times [2021-07-13 20:08:25,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:25,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876023450] [2021-07-13 20:08:25,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:25,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:25,982 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:08:25,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:25,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876023450] [2021-07-13 20:08:25,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876023450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:25,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139286331] [2021-07-13 20:08:25,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:26,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:08:26,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:26,071 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:08:26,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139286331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:26,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:26,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 20:08:26,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127362753] [2021-07-13 20:08:26,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:08:26,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:26,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:08:26,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:08:26,072 INFO L87 Difference]: Start difference. First operand 385 states and 799 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:26,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:26,181 INFO L93 Difference]: Finished difference Result 609 states and 1226 transitions. [2021-07-13 20:08:26,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:08:26,181 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:08:26,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:26,182 INFO L225 Difference]: With dead ends: 609 [2021-07-13 20:08:26,182 INFO L226 Difference]: Without dead ends: 561 [2021-07-13 20:08:26,182 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:08:26,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-07-13 20:08:26,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 422. [2021-07-13 20:08:26,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.0855106888361044) internal successors, (878), 421 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:26,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 878 transitions. [2021-07-13 20:08:26,187 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 878 transitions. Word has length 37 [2021-07-13 20:08:26,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:26,187 INFO L482 AbstractCegarLoop]: Abstraction has 422 states and 878 transitions. [2021-07-13 20:08:26,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:26,187 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 878 transitions. [2021-07-13 20:08:26,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:08:26,187 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:26,187 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:26,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:26,388 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:26,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:26,388 INFO L82 PathProgramCache]: Analyzing trace with hash 807325429, now seen corresponding path program 98 times [2021-07-13 20:08:26,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:26,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029941155] [2021-07-13 20:08:26,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:26,658 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:26,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:26,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029941155] [2021-07-13 20:08:26,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029941155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:26,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148591398] [2021-07-13 20:08:26,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:26,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:26,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:26,684 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 20:08:26,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:27,174 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:27,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148591398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:27,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:27,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2021-07-13 20:08:27,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594066267] [2021-07-13 20:08:27,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:08:27,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:27,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:08:27,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:08:27,175 INFO L87 Difference]: Start difference. First operand 422 states and 878 transitions. Second operand has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:33,294 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-07-13 20:08:34,040 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-07-13 20:08:34,220 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2021-07-13 20:08:34,500 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-07-13 20:08:37,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:37,381 INFO L93 Difference]: Finished difference Result 1608 states and 3197 transitions. [2021-07-13 20:08:37,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2021-07-13 20:08:37,381 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have 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 20:08:37,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:37,383 INFO L225 Difference]: With dead ends: 1608 [2021-07-13 20:08:37,383 INFO L226 Difference]: Without dead ends: 1540 [2021-07-13 20:08:37,385 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15558 ImplicationChecksByTransitivity, 9289.5ms TimeCoverageRelationStatistics Valid=4687, Invalid=33533, Unknown=0, NotChecked=0, Total=38220 [2021-07-13 20:08:37,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2021-07-13 20:08:37,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 585. [2021-07-13 20:08:37,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.1113013698630136) internal successors, (1233), 584 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:37,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1233 transitions. [2021-07-13 20:08:37,394 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1233 transitions. Word has length 37 [2021-07-13 20:08:37,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:37,394 INFO L482 AbstractCegarLoop]: Abstraction has 585 states and 1233 transitions. [2021-07-13 20:08:37,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:37,394 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1233 transitions. [2021-07-13 20:08:37,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:08:37,395 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:37,395 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:37,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:37,609 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:37,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:37,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1398345563, now seen corresponding path program 99 times [2021-07-13 20:08:37,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:37,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228014486] [2021-07-13 20:08:37,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:37,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:37,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:37,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228014486] [2021-07-13 20:08:37,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228014486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:37,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819561205] [2021-07-13 20:08:37,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:37,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:08:37,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:37,890 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 20:08:37,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:38,349 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:38,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819561205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:38,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:38,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-07-13 20:08:38,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194927573] [2021-07-13 20:08:38,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:08:38,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:38,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:08:38,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1131, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:08:38,350 INFO L87 Difference]: Start difference. First operand 585 states and 1233 transitions. Second operand has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 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 20:08:40,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:40,723 INFO L93 Difference]: Finished difference Result 965 states and 1949 transitions. [2021-07-13 20:08:40,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-13 20:08:40,723 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 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 37 [2021-07-13 20:08:40,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:40,724 INFO L225 Difference]: With dead ends: 965 [2021-07-13 20:08:40,724 INFO L226 Difference]: Without dead ends: 923 [2021-07-13 20:08:40,725 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2503 ImplicationChecksByTransitivity, 2180.3ms TimeCoverageRelationStatistics Valid=660, Invalid=7350, Unknown=0, NotChecked=0, Total=8010 [2021-07-13 20:08:40,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-07-13 20:08:40,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 576. [2021-07-13 20:08:40,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 2.1043478260869564) internal successors, (1210), 575 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:40,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1210 transitions. [2021-07-13 20:08:40,731 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1210 transitions. Word has length 37 [2021-07-13 20:08:40,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:40,731 INFO L482 AbstractCegarLoop]: Abstraction has 576 states and 1210 transitions. [2021-07-13 20:08:40,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 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 20:08:40,731 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1210 transitions. [2021-07-13 20:08:40,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:08:40,732 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:40,732 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:40,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-07-13 20:08:40,932 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:40,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:40,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1584538635, now seen corresponding path program 100 times [2021-07-13 20:08:40,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:40,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689863013] [2021-07-13 20:08:40,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:40,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:41,119 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:08:41,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:41,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689863013] [2021-07-13 20:08:41,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689863013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:41,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975132204] [2021-07-13 20:08:41,120 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 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 20:08:41,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:08:41,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:41,144 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 20:08:41,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:41,551 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:41,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975132204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:41,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:41,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2021-07-13 20:08:41,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27703118] [2021-07-13 20:08:41,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:08:41,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:41,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:08:41,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:08:41,552 INFO L87 Difference]: Start difference. First operand 576 states and 1210 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:42,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:42,447 INFO L93 Difference]: Finished difference Result 810 states and 1676 transitions. [2021-07-13 20:08:42,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:08:42,447 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have 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 20:08:42,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:42,448 INFO L225 Difference]: With dead ends: 810 [2021-07-13 20:08:42,448 INFO L226 Difference]: Without dead ends: 790 [2021-07-13 20:08:42,448 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 873.1ms TimeCoverageRelationStatistics Valid=346, Invalid=2516, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:08:42,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-07-13 20:08:42,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 536. [2021-07-13 20:08:42,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 2.1121495327102804) internal successors, (1130), 535 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:42,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 1130 transitions. [2021-07-13 20:08:42,454 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 1130 transitions. Word has length 37 [2021-07-13 20:08:42,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:42,454 INFO L482 AbstractCegarLoop]: Abstraction has 536 states and 1130 transitions. [2021-07-13 20:08:42,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:42,454 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 1130 transitions. [2021-07-13 20:08:42,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:08:42,455 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:42,455 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:42,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-07-13 20:08:42,667 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:42,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:42,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1136264889, now seen corresponding path program 101 times [2021-07-13 20:08:42,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:42,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177377400] [2021-07-13 20:08:42,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:42,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:42,902 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:42,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:42,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177377400] [2021-07-13 20:08:42,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177377400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:42,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540990746] [2021-07-13 20:08:42,903 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 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 20:08:42,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:08:42,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:42,929 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 20:08:42,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:43,387 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:43,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540990746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:43,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:43,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 33 [2021-07-13 20:08:43,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285275241] [2021-07-13 20:08:43,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:08:43,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:43,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:08:43,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:08:43,388 INFO L87 Difference]: Start difference. First operand 536 states and 1130 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:50,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:50,272 INFO L93 Difference]: Finished difference Result 1533 states and 3130 transitions. [2021-07-13 20:08:50,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-07-13 20:08:50,272 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have 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 20:08:50,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:50,274 INFO L225 Difference]: With dead ends: 1533 [2021-07-13 20:08:50,274 INFO L226 Difference]: Without dead ends: 1494 [2021-07-13 20:08:50,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8152 ImplicationChecksByTransitivity, 6232.1ms TimeCoverageRelationStatistics Valid=2594, Invalid=18868, Unknown=0, NotChecked=0, Total=21462 [2021-07-13 20:08:50,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2021-07-13 20:08:50,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 599. [2021-07-13 20:08:50,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 2.100334448160535) internal successors, (1256), 598 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:50,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1256 transitions. [2021-07-13 20:08:50,283 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1256 transitions. Word has length 37 [2021-07-13 20:08:50,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:50,283 INFO L482 AbstractCegarLoop]: Abstraction has 599 states and 1256 transitions. [2021-07-13 20:08:50,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:50,283 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1256 transitions. [2021-07-13 20:08:50,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:08:50,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:50,283 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:50,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-07-13 20:08:50,485 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:50,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:50,485 INFO L82 PathProgramCache]: Analyzing trace with hash -829971433, now seen corresponding path program 102 times [2021-07-13 20:08:50,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:50,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071420663] [2021-07-13 20:08:50,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:50,748 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:50,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:50,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071420663] [2021-07-13 20:08:50,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071420663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:50,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907525525] [2021-07-13 20:08:50,749 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 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 20:08:50,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:08:50,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:50,775 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:08:50,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:51,194 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:51,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907525525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:51,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:51,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-13 20:08:51,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692258790] [2021-07-13 20:08:51,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:08:51,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:51,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:08:51,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:08:51,195 INFO L87 Difference]: Start difference. First operand 599 states and 1256 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:53,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:53,156 INFO L93 Difference]: Finished difference Result 1197 states and 2449 transitions. [2021-07-13 20:08:53,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:08:53,156 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have 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 20:08:53,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:53,157 INFO L225 Difference]: With dead ends: 1197 [2021-07-13 20:08:53,158 INFO L226 Difference]: Without dead ends: 1130 [2021-07-13 20:08:53,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2587 ImplicationChecksByTransitivity, 2053.5ms TimeCoverageRelationStatistics Valid=1130, Invalid=7800, Unknown=0, NotChecked=0, Total=8930 [2021-07-13 20:08:53,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2021-07-13 20:08:53,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 752. [2021-07-13 20:08:53,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 2.1757656458055927) internal successors, (1634), 751 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:53,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1634 transitions. [2021-07-13 20:08:53,166 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1634 transitions. Word has length 39 [2021-07-13 20:08:53,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:53,166 INFO L482 AbstractCegarLoop]: Abstraction has 752 states and 1634 transitions. [2021-07-13 20:08:53,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:53,166 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1634 transitions. [2021-07-13 20:08:53,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:08:53,167 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:53,167 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:53,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:53,367 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:53,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:53,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1236547937, now seen corresponding path program 103 times [2021-07-13 20:08:53,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:53,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046439464] [2021-07-13 20:08:53,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:53,632 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:53,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:53,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046439464] [2021-07-13 20:08:53,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046439464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:53,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84157389] [2021-07-13 20:08:53,632 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 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 20:08:53,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:53,656 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:08:53,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:54,079 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:54,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84157389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:54,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:54,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-13 20:08:54,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223539531] [2021-07-13 20:08:54,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:08:54,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:54,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:08:54,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:08:54,081 INFO L87 Difference]: Start difference. First operand 752 states and 1634 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:56,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:56,253 INFO L93 Difference]: Finished difference Result 1229 states and 2502 transitions. [2021-07-13 20:08:56,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-07-13 20:08:56,253 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have 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 20:08:56,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:56,254 INFO L225 Difference]: With dead ends: 1229 [2021-07-13 20:08:56,254 INFO L226 Difference]: Without dead ends: 1173 [2021-07-13 20:08:56,255 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2946 ImplicationChecksByTransitivity, 2125.6ms TimeCoverageRelationStatistics Valid=1214, Invalid=8686, Unknown=0, NotChecked=0, Total=9900 [2021-07-13 20:08:56,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-07-13 20:08:56,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 754. [2021-07-13 20:08:56,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 2.1752988047808763) internal successors, (1638), 753 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:56,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1638 transitions. [2021-07-13 20:08:56,263 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1638 transitions. Word has length 39 [2021-07-13 20:08:56,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:56,263 INFO L482 AbstractCegarLoop]: Abstraction has 754 states and 1638 transitions. [2021-07-13 20:08:56,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:56,263 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1638 transitions. [2021-07-13 20:08:56,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:08:56,264 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:56,264 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:56,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-07-13 20:08:56,464 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:56,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:56,465 INFO L82 PathProgramCache]: Analyzing trace with hash 907136483, now seen corresponding path program 104 times [2021-07-13 20:08:56,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:56,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638130022] [2021-07-13 20:08:56,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:56,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:56,726 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:56,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:56,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638130022] [2021-07-13 20:08:56,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638130022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:56,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426471888] [2021-07-13 20:08:56,726 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 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 20:08:56,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:56,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:56,750 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:08:56,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:57,175 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:57,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426471888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:57,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:57,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-13 20:08:57,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489963796] [2021-07-13 20:08:57,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:08:57,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:57,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:08:57,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:08:57,176 INFO L87 Difference]: Start difference. First operand 754 states and 1638 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:59,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:59,471 INFO L93 Difference]: Finished difference Result 1227 states and 2500 transitions. [2021-07-13 20:08:59,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 20:08:59,472 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have 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 20:08:59,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:59,473 INFO L225 Difference]: With dead ends: 1227 [2021-07-13 20:08:59,473 INFO L226 Difference]: Without dead ends: 1177 [2021-07-13 20:08:59,474 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3299 ImplicationChecksByTransitivity, 2246.1ms TimeCoverageRelationStatistics Valid=1311, Invalid=9609, Unknown=0, NotChecked=0, Total=10920 [2021-07-13 20:08:59,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-07-13 20:08:59,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 756. [2021-07-13 20:08:59,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.174834437086093) internal successors, (1642), 755 states have internal predecessors, (1642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:59,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1642 transitions. [2021-07-13 20:08:59,482 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1642 transitions. Word has length 39 [2021-07-13 20:08:59,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:59,482 INFO L482 AbstractCegarLoop]: Abstraction has 756 states and 1642 transitions. [2021-07-13 20:08:59,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:59,482 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1642 transitions. [2021-07-13 20:08:59,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:08:59,483 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:59,483 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:59,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-07-13 20:08:59,683 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:59,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:59,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1937298983, now seen corresponding path program 105 times [2021-07-13 20:08:59,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:59,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195365173] [2021-07-13 20:08:59,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:59,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:59,943 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:59,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:59,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195365173] [2021-07-13 20:08:59,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195365173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:59,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550730929] [2021-07-13 20:08:59,944 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 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 20:08:59,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:08:59,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:59,972 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-13 20:08:59,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:00,602 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:00,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550730929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:00,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:00,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-13 20:09:00,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107018748] [2021-07-13 20:09:00,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:09:00,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:00,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:09:00,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:09:00,603 INFO L87 Difference]: Start difference. First operand 756 states and 1642 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:04,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:04,389 INFO L93 Difference]: Finished difference Result 1231 states and 2510 transitions. [2021-07-13 20:09:04,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-07-13 20:09:04,390 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have 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 20:09:04,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:04,391 INFO L225 Difference]: With dead ends: 1231 [2021-07-13 20:09:04,391 INFO L226 Difference]: Without dead ends: 1187 [2021-07-13 20:09:04,392 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4231 ImplicationChecksByTransitivity, 3435.4ms TimeCoverageRelationStatistics Valid=1548, Invalid=13458, Unknown=0, NotChecked=0, Total=15006 [2021-07-13 20:09:04,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2021-07-13 20:09:04,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 758. [2021-07-13 20:09:04,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 2.1743725231175692) internal successors, (1646), 757 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:04,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 1646 transitions. [2021-07-13 20:09:04,400 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 1646 transitions. Word has length 39 [2021-07-13 20:09:04,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:04,400 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 1646 transitions. [2021-07-13 20:09:04,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:04,400 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 1646 transitions. [2021-07-13 20:09:04,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:09:04,401 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:04,401 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:04,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:04,604 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:04,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:04,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1261625493, now seen corresponding path program 106 times [2021-07-13 20:09:04,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:04,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684169958] [2021-07-13 20:09:04,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:04,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:04,867 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:04,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:04,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684169958] [2021-07-13 20:09:04,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684169958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:04,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410348572] [2021-07-13 20:09:04,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:04,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:09:04,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:04,900 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:09:04,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:05,321 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:05,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410348572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:05,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:05,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-13 20:09:05,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413793376] [2021-07-13 20:09:05,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:09:05,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:05,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:09:05,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:09:05,322 INFO L87 Difference]: Start difference. First operand 758 states and 1646 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:08,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:08,023 INFO L93 Difference]: Finished difference Result 1225 states and 2500 transitions. [2021-07-13 20:09:08,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-07-13 20:09:08,023 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have 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 20:09:08,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:08,024 INFO L225 Difference]: With dead ends: 1225 [2021-07-13 20:09:08,024 INFO L226 Difference]: Without dead ends: 1187 [2021-07-13 20:09:08,025 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4061 ImplicationChecksByTransitivity, 2485.1ms TimeCoverageRelationStatistics Valid=1580, Invalid=11530, Unknown=0, NotChecked=0, Total=13110 [2021-07-13 20:09:08,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2021-07-13 20:09:08,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 760. [2021-07-13 20:09:08,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 2.1739130434782608) internal successors, (1650), 759 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:08,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 1650 transitions. [2021-07-13 20:09:08,033 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 1650 transitions. Word has length 39 [2021-07-13 20:09:08,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:08,033 INFO L482 AbstractCegarLoop]: Abstraction has 760 states and 1650 transitions. [2021-07-13 20:09:08,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:08,033 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 1650 transitions. [2021-07-13 20:09:08,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:09:08,034 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:08,034 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:08,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:08,235 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:08,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:08,235 INFO L82 PathProgramCache]: Analyzing trace with hash -429200977, now seen corresponding path program 107 times [2021-07-13 20:09:08,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:08,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150394518] [2021-07-13 20:09:08,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:08,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:08,540 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:08,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:08,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150394518] [2021-07-13 20:09:08,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150394518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:08,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18862174] [2021-07-13 20:09:08,541 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:08,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:09:08,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:08,567 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:09:08,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:08,989 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:08,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18862174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:08,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:08,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-13 20:09:08,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69977444] [2021-07-13 20:09:08,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:09:08,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:08,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:09:08,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:09:08,991 INFO L87 Difference]: Start difference. First operand 760 states and 1650 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:11,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:11,957 INFO L93 Difference]: Finished difference Result 1282 states and 2603 transitions. [2021-07-13 20:09:11,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-07-13 20:09:11,958 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have 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 20:09:11,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:11,959 INFO L225 Difference]: With dead ends: 1282 [2021-07-13 20:09:11,959 INFO L226 Difference]: Without dead ends: 1237 [2021-07-13 20:09:11,960 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4334 ImplicationChecksByTransitivity, 2792.8ms TimeCoverageRelationStatistics Valid=1736, Invalid=12306, Unknown=0, NotChecked=0, Total=14042 [2021-07-13 20:09:11,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-07-13 20:09:11,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 763. [2021-07-13 20:09:11,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 2.1758530183727034) internal successors, (1658), 762 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:11,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 1658 transitions. [2021-07-13 20:09:11,968 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 1658 transitions. Word has length 39 [2021-07-13 20:09:11,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:11,968 INFO L482 AbstractCegarLoop]: Abstraction has 763 states and 1658 transitions. [2021-07-13 20:09:11,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:11,968 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 1658 transitions. [2021-07-13 20:09:11,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:09:11,969 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:11,969 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:12,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-07-13 20:09:12,170 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:12,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:12,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1694128837, now seen corresponding path program 108 times [2021-07-13 20:09:12,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:12,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027325960] [2021-07-13 20:09:12,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:12,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:12,477 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:12,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:12,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027325960] [2021-07-13 20:09:12,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027325960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:12,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798526899] [2021-07-13 20:09:12,478 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 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 20:09:12,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:09:12,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:12,504 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-13 20:09:12,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:13,093 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:13,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798526899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:13,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:13,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-13 20:09:13,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578576231] [2021-07-13 20:09:13,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:09:13,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:13,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:09:13,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1315, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:09:13,095 INFO L87 Difference]: Start difference. First operand 763 states and 1658 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:16,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:16,841 INFO L93 Difference]: Finished difference Result 1163 states and 2364 transitions. [2021-07-13 20:09:16,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-07-13 20:09:16,841 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have 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 20:09:16,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:16,842 INFO L225 Difference]: With dead ends: 1163 [2021-07-13 20:09:16,842 INFO L226 Difference]: Without dead ends: 1136 [2021-07-13 20:09:16,843 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4206 ImplicationChecksByTransitivity, 3371.1ms TimeCoverageRelationStatistics Valid=1767, Invalid=12513, Unknown=0, NotChecked=0, Total=14280 [2021-07-13 20:09:16,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-07-13 20:09:16,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 782. [2021-07-13 20:09:16,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 2.17797695262484) internal successors, (1701), 781 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:16,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1701 transitions. [2021-07-13 20:09:16,851 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1701 transitions. Word has length 39 [2021-07-13 20:09:16,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:16,851 INFO L482 AbstractCegarLoop]: Abstraction has 782 states and 1701 transitions. [2021-07-13 20:09:16,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:16,851 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1701 transitions. [2021-07-13 20:09:16,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:09:16,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:16,852 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:17,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:17,052 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:17,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:17,053 INFO L82 PathProgramCache]: Analyzing trace with hash 318889065, now seen corresponding path program 109 times [2021-07-13 20:09:17,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:17,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775970633] [2021-07-13 20:09:17,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:17,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:17,302 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:17,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:17,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775970633] [2021-07-13 20:09:17,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775970633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:17,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037337030] [2021-07-13 20:09:17,303 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 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 20:09:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:17,327 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:09:17,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:17,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037337030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:17,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:17,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-13 20:09:17,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899222018] [2021-07-13 20:09:17,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:09:17,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:17,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:09:17,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1309, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:09:17,763 INFO L87 Difference]: Start difference. First operand 782 states and 1701 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:19,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:19,907 INFO L93 Difference]: Finished difference Result 1209 states and 2470 transitions. [2021-07-13 20:09:19,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-13 20:09:19,907 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have 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 20:09:19,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:19,908 INFO L225 Difference]: With dead ends: 1209 [2021-07-13 20:09:19,908 INFO L226 Difference]: Without dead ends: 1159 [2021-07-13 20:09:19,909 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2982 ImplicationChecksByTransitivity, 2103.5ms TimeCoverageRelationStatistics Valid=1134, Invalid=8766, Unknown=0, NotChecked=0, Total=9900 [2021-07-13 20:09:19,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-07-13 20:09:19,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 784. [2021-07-13 20:09:19,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 2.177522349936143) internal successors, (1705), 783 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:19,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1705 transitions. [2021-07-13 20:09:19,917 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1705 transitions. Word has length 39 [2021-07-13 20:09:19,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:19,917 INFO L482 AbstractCegarLoop]: Abstraction has 784 states and 1705 transitions. [2021-07-13 20:09:19,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:19,917 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1705 transitions. [2021-07-13 20:09:19,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:09:19,918 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:19,918 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:20,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:20,118 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:20,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:20,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1349051565, now seen corresponding path program 110 times [2021-07-13 20:09:20,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:20,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542499108] [2021-07-13 20:09:20,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:20,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:20,373 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:20,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:20,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542499108] [2021-07-13 20:09:20,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542499108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:20,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391039340] [2021-07-13 20:09:20,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:20,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:09:20,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:20,397 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:09:20,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:20,831 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:20,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391039340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:20,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:20,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-13 20:09:20,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089766447] [2021-07-13 20:09:20,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:09:20,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:20,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:09:20,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1307, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:09:20,832 INFO L87 Difference]: Start difference. First operand 784 states and 1705 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:23,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:23,003 INFO L93 Difference]: Finished difference Result 1212 states and 2490 transitions. [2021-07-13 20:09:23,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-07-13 20:09:23,003 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have 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 20:09:23,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:23,004 INFO L225 Difference]: With dead ends: 1212 [2021-07-13 20:09:23,004 INFO L226 Difference]: Without dead ends: 1168 [2021-07-13 20:09:23,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3335 ImplicationChecksByTransitivity, 2200.8ms TimeCoverageRelationStatistics Valid=1265, Invalid=9655, Unknown=0, NotChecked=0, Total=10920 [2021-07-13 20:09:23,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-07-13 20:09:23,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 794. [2021-07-13 20:09:23,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 793 states have (on average 2.1853720050441363) internal successors, (1733), 793 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:23,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1733 transitions. [2021-07-13 20:09:23,013 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1733 transitions. Word has length 39 [2021-07-13 20:09:23,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:23,013 INFO L482 AbstractCegarLoop]: Abstraction has 794 states and 1733 transitions. [2021-07-13 20:09:23,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:23,013 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1733 transitions. [2021-07-13 20:09:23,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:09:23,014 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:23,014 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:23,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-07-13 20:09:23,214 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:23,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:23,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1849872911, now seen corresponding path program 111 times [2021-07-13 20:09:23,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:23,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290184002] [2021-07-13 20:09:23,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:23,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:23,467 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:23,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:23,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290184002] [2021-07-13 20:09:23,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290184002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:23,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737596424] [2021-07-13 20:09:23,468 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 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 20:09:23,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:09:23,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:23,494 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 20:09:23,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:24,087 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:24,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737596424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:24,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:24,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-13 20:09:24,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624584606] [2021-07-13 20:09:24,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:09:24,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:24,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:09:24,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1328, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:09:24,088 INFO L87 Difference]: Start difference. First operand 794 states and 1733 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:27,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:27,448 INFO L93 Difference]: Finished difference Result 1224 states and 2528 transitions. [2021-07-13 20:09:27,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-07-13 20:09:27,449 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have 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 20:09:27,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:27,450 INFO L225 Difference]: With dead ends: 1224 [2021-07-13 20:09:27,450 INFO L226 Difference]: Without dead ends: 1186 [2021-07-13 20:09:27,451 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3844 ImplicationChecksByTransitivity, 3037.1ms TimeCoverageRelationStatistics Valid=1462, Invalid=11878, Unknown=0, NotChecked=0, Total=13340 [2021-07-13 20:09:27,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-07-13 20:09:27,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 804. [2021-07-13 20:09:27,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 2.1930261519302614) internal successors, (1761), 803 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:27,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 1761 transitions. [2021-07-13 20:09:27,459 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 1761 transitions. Word has length 39 [2021-07-13 20:09:27,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:27,459 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 1761 transitions. [2021-07-13 20:09:27,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:27,459 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 1761 transitions. [2021-07-13 20:09:27,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:09:27,460 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:27,460 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:27,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-07-13 20:09:27,661 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:27,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:27,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1017448395, now seen corresponding path program 112 times [2021-07-13 20:09:27,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:27,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642270190] [2021-07-13 20:09:27,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:27,947 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:27,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:27,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642270190] [2021-07-13 20:09:27,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642270190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:27,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332079385] [2021-07-13 20:09:27,948 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 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 20:09:27,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:09:27,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:27,972 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:09:27,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:28,395 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:28,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332079385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:28,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:28,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-13 20:09:28,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173440662] [2021-07-13 20:09:28,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:09:28,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:28,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:09:28,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:09:28,397 INFO L87 Difference]: Start difference. First operand 804 states and 1761 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:31,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:31,218 INFO L93 Difference]: Finished difference Result 1310 states and 2688 transitions. [2021-07-13 20:09:31,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-07-13 20:09:31,219 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have 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 20:09:31,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:31,220 INFO L225 Difference]: With dead ends: 1310 [2021-07-13 20:09:31,220 INFO L226 Difference]: Without dead ends: 1265 [2021-07-13 20:09:31,221 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3959 ImplicationChecksByTransitivity, 2631.3ms TimeCoverageRelationStatistics Valid=1571, Invalid=11311, Unknown=0, NotChecked=0, Total=12882 [2021-07-13 20:09:31,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2021-07-13 20:09:31,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 808. [2021-07-13 20:09:31,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 2.195786864931846) internal successors, (1772), 807 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:31,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1772 transitions. [2021-07-13 20:09:31,230 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1772 transitions. Word has length 39 [2021-07-13 20:09:31,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:31,230 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 1772 transitions. [2021-07-13 20:09:31,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:31,230 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1772 transitions. [2021-07-13 20:09:31,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:09:31,231 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:31,231 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:31,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:31,432 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:31,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:31,432 INFO L82 PathProgramCache]: Analyzing trace with hash 2012591041, now seen corresponding path program 113 times [2021-07-13 20:09:31,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:31,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900132261] [2021-07-13 20:09:31,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:31,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:31,721 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:31,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:31,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900132261] [2021-07-13 20:09:31,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900132261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:31,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406804041] [2021-07-13 20:09:31,721 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:31,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:09:31,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:31,749 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:09:31,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:32,196 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:32,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406804041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:32,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:32,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-13 20:09:32,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919598546] [2021-07-13 20:09:32,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:09:32,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:32,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:09:32,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1286, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:09:32,197 INFO L87 Difference]: Start difference. First operand 808 states and 1772 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:34,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:34,723 INFO L93 Difference]: Finished difference Result 1169 states and 2413 transitions. [2021-07-13 20:09:34,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-07-13 20:09:34,723 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have 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 20:09:34,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:34,725 INFO L225 Difference]: With dead ends: 1169 [2021-07-13 20:09:34,725 INFO L226 Difference]: Without dead ends: 1142 [2021-07-13 20:09:34,725 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3353 ImplicationChecksByTransitivity, 2458.7ms TimeCoverageRelationStatistics Valid=1492, Invalid=9638, Unknown=0, NotChecked=0, Total=11130 [2021-07-13 20:09:34,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2021-07-13 20:09:34,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 774. [2021-07-13 20:09:34,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 2.179818887451488) internal successors, (1685), 773 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:34,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1685 transitions. [2021-07-13 20:09:34,733 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1685 transitions. Word has length 39 [2021-07-13 20:09:34,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:34,734 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 1685 transitions. [2021-07-13 20:09:34,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:34,734 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1685 transitions. [2021-07-13 20:09:34,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:09:34,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:34,735 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:34,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:34,949 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:34,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:34,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1299362665, now seen corresponding path program 114 times [2021-07-13 20:09:34,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:34,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638013282] [2021-07-13 20:09:34,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:34,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:35,209 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:35,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:35,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638013282] [2021-07-13 20:09:35,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638013282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:35,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743676739] [2021-07-13 20:09:35,209 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:35,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:09:35,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:35,235 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 56 conjunts are in the unsatisfiable core [2021-07-13 20:09:35,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:35,690 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:35,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743676739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:35,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:35,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-13 20:09:35,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489297920] [2021-07-13 20:09:35,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:09:35,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:35,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:09:35,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1307, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:09:35,691 INFO L87 Difference]: Start difference. First operand 774 states and 1685 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:38,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:38,031 INFO L93 Difference]: Finished difference Result 1152 states and 2354 transitions. [2021-07-13 20:09:38,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-07-13 20:09:38,032 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have 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 20:09:38,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:38,033 INFO L225 Difference]: With dead ends: 1152 [2021-07-13 20:09:38,033 INFO L226 Difference]: Without dead ends: 1108 [2021-07-13 20:09:38,034 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3406 ImplicationChecksByTransitivity, 2301.1ms TimeCoverageRelationStatistics Valid=1243, Invalid=9887, Unknown=0, NotChecked=0, Total=11130 [2021-07-13 20:09:38,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-07-13 20:09:38,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 776. [2021-07-13 20:09:38,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 2.1793548387096773) internal successors, (1689), 775 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:38,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1689 transitions. [2021-07-13 20:09:38,041 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1689 transitions. Word has length 39 [2021-07-13 20:09:38,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:38,041 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 1689 transitions. [2021-07-13 20:09:38,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:38,042 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1689 transitions. [2021-07-13 20:09:38,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:09:38,042 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:38,042 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:38,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:38,243 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:38,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:38,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1899561811, now seen corresponding path program 115 times [2021-07-13 20:09:38,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:38,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473390943] [2021-07-13 20:09:38,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:38,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:38,498 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:38,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:38,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473390943] [2021-07-13 20:09:38,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473390943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:38,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097198014] [2021-07-13 20:09:38,498 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:38,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:38,524 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:09:38,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:38,965 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:38,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097198014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:38,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:38,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-13 20:09:38,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342426747] [2021-07-13 20:09:38,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:09:38,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:38,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:09:38,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:09:38,966 INFO L87 Difference]: Start difference. First operand 776 states and 1689 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:41,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:41,374 INFO L93 Difference]: Finished difference Result 1157 states and 2374 transitions. [2021-07-13 20:09:41,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-13 20:09:41,374 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have 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 20:09:41,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:41,375 INFO L225 Difference]: With dead ends: 1157 [2021-07-13 20:09:41,375 INFO L226 Difference]: Without dead ends: 1119 [2021-07-13 20:09:41,376 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3829 ImplicationChecksByTransitivity, 2385.5ms TimeCoverageRelationStatistics Valid=1411, Invalid=10799, Unknown=0, NotChecked=0, Total=12210 [2021-07-13 20:09:41,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-07-13 20:09:41,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 782. [2021-07-13 20:09:41,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 2.183098591549296) internal successors, (1705), 781 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:41,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1705 transitions. [2021-07-13 20:09:41,384 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1705 transitions. Word has length 39 [2021-07-13 20:09:41,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:41,384 INFO L482 AbstractCegarLoop]: Abstraction has 782 states and 1705 transitions. [2021-07-13 20:09:41,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:41,384 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1705 transitions. [2021-07-13 20:09:41,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:09:41,385 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:41,385 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:41,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-07-13 20:09:41,586 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:41,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:41,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1067137295, now seen corresponding path program 116 times [2021-07-13 20:09:41,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:41,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200093053] [2021-07-13 20:09:41,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:41,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:41,881 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:41,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:41,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200093053] [2021-07-13 20:09:41,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200093053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:41,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637183074] [2021-07-13 20:09:41,882 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:41,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:09:41,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:41,909 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:09:41,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:42,344 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:42,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637183074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:42,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:42,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-13 20:09:42,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357005693] [2021-07-13 20:09:42,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:09:42,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:42,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:09:42,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1285, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:09:42,345 INFO L87 Difference]: Start difference. First operand 782 states and 1705 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:45,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:45,099 INFO L93 Difference]: Finished difference Result 1249 states and 2546 transitions. [2021-07-13 20:09:45,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-07-13 20:09:45,100 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have 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 20:09:45,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:45,101 INFO L225 Difference]: With dead ends: 1249 [2021-07-13 20:09:45,101 INFO L226 Difference]: Without dead ends: 1204 [2021-07-13 20:09:45,102 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4088 ImplicationChecksByTransitivity, 2720.7ms TimeCoverageRelationStatistics Valid=1579, Invalid=11531, Unknown=0, NotChecked=0, Total=13110 [2021-07-13 20:09:45,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-07-13 20:09:45,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 786. [2021-07-13 20:09:45,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 2.1859872611464968) internal successors, (1716), 785 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:45,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1716 transitions. [2021-07-13 20:09:45,110 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1716 transitions. Word has length 39 [2021-07-13 20:09:45,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:45,110 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 1716 transitions. [2021-07-13 20:09:45,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:45,110 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1716 transitions. [2021-07-13 20:09:45,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:09:45,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:45,111 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:45,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-07-13 20:09:45,312 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:45,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:45,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1962902141, now seen corresponding path program 117 times [2021-07-13 20:09:45,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:45,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551686422] [2021-07-13 20:09:45,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:45,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:45,623 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:45,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:45,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551686422] [2021-07-13 20:09:45,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551686422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:45,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386825276] [2021-07-13 20:09:45,623 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:45,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:09:45,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:45,652 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-13 20:09:45,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:46,335 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:46,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386825276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:46,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:46,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-13 20:09:46,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59873996] [2021-07-13 20:09:46,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:09:46,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:46,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:09:46,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1353, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:09:46,336 INFO L87 Difference]: Start difference. First operand 786 states and 1716 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:50,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:50,363 INFO L93 Difference]: Finished difference Result 1162 states and 2375 transitions. [2021-07-13 20:09:50,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-07-13 20:09:50,363 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have 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 20:09:50,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:50,364 INFO L225 Difference]: With dead ends: 1162 [2021-07-13 20:09:50,364 INFO L226 Difference]: Without dead ends: 1121 [2021-07-13 20:09:50,365 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4026 ImplicationChecksByTransitivity, 3762.5ms TimeCoverageRelationStatistics Valid=1607, Invalid=12673, Unknown=0, NotChecked=0, Total=14280 [2021-07-13 20:09:50,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-07-13 20:09:50,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 604. [2021-07-13 20:09:50,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 2.1160862354892207) internal successors, (1276), 603 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:50,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 1276 transitions. [2021-07-13 20:09:50,371 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 1276 transitions. Word has length 39 [2021-07-13 20:09:50,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:50,371 INFO L482 AbstractCegarLoop]: Abstraction has 604 states and 1276 transitions. [2021-07-13 20:09:50,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:50,372 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 1276 transitions. [2021-07-13 20:09:50,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:09:50,372 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:50,372 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:50,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:50,573 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:50,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:50,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1278036585, now seen corresponding path program 118 times [2021-07-13 20:09:50,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:50,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394721900] [2021-07-13 20:09:50,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:50,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:50,831 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:50,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:50,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394721900] [2021-07-13 20:09:50,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394721900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:50,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841169289] [2021-07-13 20:09:50,831 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:50,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:09:50,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:50,857 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:09:50,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:51,303 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:51,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841169289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:51,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:51,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-13 20:09:51,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367343367] [2021-07-13 20:09:51,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:09:51,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:51,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:09:51,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:09:51,304 INFO L87 Difference]: Start difference. First operand 604 states and 1276 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:53,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:53,812 INFO L93 Difference]: Finished difference Result 922 states and 1823 transitions. [2021-07-13 20:09:53,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-13 20:09:53,812 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have 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 20:09:53,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:53,813 INFO L225 Difference]: With dead ends: 922 [2021-07-13 20:09:53,813 INFO L226 Difference]: Without dead ends: 884 [2021-07-13 20:09:53,814 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3950 ImplicationChecksByTransitivity, 2441.8ms TimeCoverageRelationStatistics Valid=1385, Invalid=11047, Unknown=0, NotChecked=0, Total=12432 [2021-07-13 20:09:53,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-07-13 20:09:53,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 606. [2021-07-13 20:09:53,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 2.115702479338843) internal successors, (1280), 605 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:53,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1280 transitions. [2021-07-13 20:09:53,820 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1280 transitions. Word has length 39 [2021-07-13 20:09:53,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:53,820 INFO L482 AbstractCegarLoop]: Abstraction has 606 states and 1280 transitions. [2021-07-13 20:09:53,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:53,820 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1280 transitions. [2021-07-13 20:09:53,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:09:53,820 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:53,821 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:54,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable264 [2021-07-13 20:09:54,021 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:54,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:54,022 INFO L82 PathProgramCache]: Analyzing trace with hash 2110461101, now seen corresponding path program 119 times [2021-07-13 20:09:54,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:54,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001859950] [2021-07-13 20:09:54,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:54,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:54,323 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:54,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:54,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001859950] [2021-07-13 20:09:54,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001859950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:54,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122365092] [2021-07-13 20:09:54,324 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:54,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:09:54,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:54,352 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:09:54,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:54,794 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:54,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122365092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:54,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:54,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-13 20:09:54,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347220614] [2021-07-13 20:09:54,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:09:54,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:54,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:09:54,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1283, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:09:54,795 INFO L87 Difference]: Start difference. First operand 606 states and 1280 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:57,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:57,632 INFO L93 Difference]: Finished difference Result 1010 states and 1983 transitions. [2021-07-13 20:09:57,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-07-13 20:09:57,633 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have 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 20:09:57,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:57,634 INFO L225 Difference]: With dead ends: 1010 [2021-07-13 20:09:57,634 INFO L226 Difference]: Without dead ends: 965 [2021-07-13 20:09:57,635 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4228 ImplicationChecksByTransitivity, 2728.6ms TimeCoverageRelationStatistics Valid=1571, Invalid=11769, Unknown=0, NotChecked=0, Total=13340 [2021-07-13 20:09:57,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-07-13 20:09:57,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 608. [2021-07-13 20:09:57,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 2.116968698517298) internal successors, (1285), 607 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:57,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 1285 transitions. [2021-07-13 20:09:57,641 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 1285 transitions. Word has length 39 [2021-07-13 20:09:57,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:57,641 INFO L482 AbstractCegarLoop]: Abstraction has 608 states and 1285 transitions. [2021-07-13 20:09:57,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:57,641 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 1285 transitions. [2021-07-13 20:09:57,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:09:57,642 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:57,642 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:57,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-07-13 20:09:57,845 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:57,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:57,845 INFO L82 PathProgramCache]: Analyzing trace with hash 845533241, now seen corresponding path program 120 times [2021-07-13 20:09:57,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:57,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274509057] [2021-07-13 20:09:57,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:57,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:58,141 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:58,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:58,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274509057] [2021-07-13 20:09:58,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274509057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:58,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432806162] [2021-07-13 20:09:58,141 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:58,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 20:09:58,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:58,168 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 20:09:58,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:58,713 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:58,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432806162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:58,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:58,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-13 20:09:58,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575443802] [2021-07-13 20:09:58,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:09:58,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:58,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:09:58,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1299, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:09:58,714 INFO L87 Difference]: Start difference. First operand 608 states and 1285 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:02,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:02,062 INFO L93 Difference]: Finished difference Result 1026 states and 2029 transitions. [2021-07-13 20:10:02,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-07-13 20:10:02,063 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have 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 20:10:02,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:02,064 INFO L225 Difference]: With dead ends: 1026 [2021-07-13 20:10:02,064 INFO L226 Difference]: Without dead ends: 978 [2021-07-13 20:10:02,065 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4001 ImplicationChecksByTransitivity, 3110.5ms TimeCoverageRelationStatistics Valid=1579, Invalid=11531, Unknown=0, NotChecked=0, Total=13110 [2021-07-13 20:10:02,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2021-07-13 20:10:02,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 595. [2021-07-13 20:10:02,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 2.1026936026936025) internal successors, (1249), 594 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:02,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1249 transitions. [2021-07-13 20:10:02,071 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1249 transitions. Word has length 39 [2021-07-13 20:10:02,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:02,071 INFO L482 AbstractCegarLoop]: Abstraction has 595 states and 1249 transitions. [2021-07-13 20:10:02,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:02,071 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1249 transitions. [2021-07-13 20:10:02,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:10:02,072 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:02,072 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:02,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:02,272 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:02,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:02,273 INFO L82 PathProgramCache]: Analyzing trace with hash 379691369, now seen corresponding path program 121 times [2021-07-13 20:10:02,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:02,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312207719] [2021-07-13 20:10:02,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:02,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:02,529 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:02,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:02,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312207719] [2021-07-13 20:10:02,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312207719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:02,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123812671] [2021-07-13 20:10:02,529 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:02,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:02,555 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:10:02,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:02,983 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:02,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123812671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:02,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:02,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-07-13 20:10:02,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500522999] [2021-07-13 20:10:02,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:10:02,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:02,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:10:02,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1284, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:10:02,984 INFO L87 Difference]: Start difference. First operand 595 states and 1249 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:06,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:06,275 INFO L93 Difference]: Finished difference Result 1028 states and 2059 transitions. [2021-07-13 20:10:06,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-07-13 20:10:06,275 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have 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 20:10:06,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:06,276 INFO L225 Difference]: With dead ends: 1028 [2021-07-13 20:10:06,276 INFO L226 Difference]: Without dead ends: 971 [2021-07-13 20:10:06,277 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5278 ImplicationChecksByTransitivity, 3098.1ms TimeCoverageRelationStatistics Valid=1778, Invalid=13972, Unknown=0, NotChecked=0, Total=15750 [2021-07-13 20:10:06,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-07-13 20:10:06,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 605. [2021-07-13 20:10:06,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 2.1009933774834435) internal successors, (1269), 604 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:06,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1269 transitions. [2021-07-13 20:10:06,283 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1269 transitions. Word has length 39 [2021-07-13 20:10:06,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:06,283 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 1269 transitions. [2021-07-13 20:10:06,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:06,283 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1269 transitions. [2021-07-13 20:10:06,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:10:06,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:06,284 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:06,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-07-13 20:10:06,484 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:06,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:06,485 INFO L82 PathProgramCache]: Analyzing trace with hash -115557073, now seen corresponding path program 122 times [2021-07-13 20:10:06,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:06,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863776854] [2021-07-13 20:10:06,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:06,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 24 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:10:06,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:06,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863776854] [2021-07-13 20:10:06,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863776854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:06,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515917472] [2021-07-13 20:10:06,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:06,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:10:06,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:06,724 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:10:06,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:07,144 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:07,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515917472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:07,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:07,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-07-13 20:10:07,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530374656] [2021-07-13 20:10:07,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:10:07,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:07,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:10:07,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1214, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:10:07,146 INFO L87 Difference]: Start difference. First operand 605 states and 1269 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:10,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:10,223 INFO L93 Difference]: Finished difference Result 1122 states and 2231 transitions. [2021-07-13 20:10:10,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-07-13 20:10:10,223 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have 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 20:10:10,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:10,224 INFO L225 Difference]: With dead ends: 1122 [2021-07-13 20:10:10,224 INFO L226 Difference]: Without dead ends: 1043 [2021-07-13 20:10:10,225 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4443 ImplicationChecksByTransitivity, 2644.0ms TimeCoverageRelationStatistics Valid=1670, Invalid=11902, Unknown=0, NotChecked=0, Total=13572 [2021-07-13 20:10:10,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2021-07-13 20:10:10,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 576. [2021-07-13 20:10:10,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 2.071304347826087) internal successors, (1191), 575 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:10,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1191 transitions. [2021-07-13 20:10:10,231 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1191 transitions. Word has length 39 [2021-07-13 20:10:10,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:10,231 INFO L482 AbstractCegarLoop]: Abstraction has 576 states and 1191 transitions. [2021-07-13 20:10:10,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:10,231 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1191 transitions. [2021-07-13 20:10:10,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:10:10,232 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:10,232 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:10,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:10,433 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:10,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:10,433 INFO L82 PathProgramCache]: Analyzing trace with hash 2015955197, now seen corresponding path program 123 times [2021-07-13 20:10:10,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:10,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939887966] [2021-07-13 20:10:10,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:10,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:10,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939887966] [2021-07-13 20:10:10,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939887966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:10,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083789359] [2021-07-13 20:10:10,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:10,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 20:10:10,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:10,749 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 56 conjunts are in the unsatisfiable core [2021-07-13 20:10:10,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:11,321 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:11,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083789359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:11,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:11,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 33 [2021-07-13 20:10:11,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538393233] [2021-07-13 20:10:11,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:10:11,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:11,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:10:11,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:10:11,322 INFO L87 Difference]: Start difference. First operand 576 states and 1191 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:15,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:15,888 INFO L93 Difference]: Finished difference Result 956 states and 1931 transitions. [2021-07-13 20:10:15,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-07-13 20:10:15,888 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 20:10:15,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:15,889 INFO L225 Difference]: With dead ends: 956 [2021-07-13 20:10:15,889 INFO L226 Difference]: Without dead ends: 917 [2021-07-13 20:10:15,890 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5056 ImplicationChecksByTransitivity, 4334.6ms TimeCoverageRelationStatistics Valid=1504, Invalid=12776, Unknown=0, NotChecked=0, Total=14280 [2021-07-13 20:10:15,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2021-07-13 20:10:15,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 508. [2021-07-13 20:10:15,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 2.078895463510848) internal successors, (1054), 507 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:15,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1054 transitions. [2021-07-13 20:10:15,895 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1054 transitions. Word has length 39 [2021-07-13 20:10:15,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:15,895 INFO L482 AbstractCegarLoop]: Abstraction has 508 states and 1054 transitions. [2021-07-13 20:10:15,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:15,896 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1054 transitions. [2021-07-13 20:10:15,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:10:15,896 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:15,896 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:16,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-07-13 20:10:16,097 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:16,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:16,097 INFO L82 PathProgramCache]: Analyzing trace with hash 963177715, now seen corresponding path program 124 times [2021-07-13 20:10:16,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:16,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568273747] [2021-07-13 20:10:16,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:16,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:16,424 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 1 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:16,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:16,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568273747] [2021-07-13 20:10:16,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568273747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:16,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752214569] [2021-07-13 20:10:16,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:16,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:10:16,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:16,457 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-13 20:10:16,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:17,009 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:17,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752214569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:17,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:17,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2021-07-13 20:10:17,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715668428] [2021-07-13 20:10:17,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:10:17,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:17,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:10:17,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1284, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:10:17,010 INFO L87 Difference]: Start difference. First operand 508 states and 1054 transitions. Second operand has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:18,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:18,403 INFO L93 Difference]: Finished difference Result 1041 states and 2115 transitions. [2021-07-13 20:10:18,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:10:18,404 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 20:10:18,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:18,405 INFO L225 Difference]: With dead ends: 1041 [2021-07-13 20:10:18,405 INFO L226 Difference]: Without dead ends: 1034 [2021-07-13 20:10:18,405 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1267.8ms TimeCoverageRelationStatistics Valid=262, Invalid=3160, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:10:18,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-07-13 20:10:18,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 524. [2021-07-13 20:10:18,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 2.0764818355640537) internal successors, (1086), 523 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:18,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1086 transitions. [2021-07-13 20:10:18,412 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1086 transitions. Word has length 39 [2021-07-13 20:10:18,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:18,412 INFO L482 AbstractCegarLoop]: Abstraction has 524 states and 1086 transitions. [2021-07-13 20:10:18,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:18,412 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1086 transitions. [2021-07-13 20:10:18,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:10:18,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:18,413 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:18,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:18,613 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:18,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:18,614 INFO L82 PathProgramCache]: Analyzing trace with hash -892338777, now seen corresponding path program 125 times [2021-07-13 20:10:18,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:18,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703874691] [2021-07-13 20:10:18,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:18,676 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:10:18,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:18,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703874691] [2021-07-13 20:10:18,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703874691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:18,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810924096] [2021-07-13 20:10:18,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:18,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 20:10:18,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:18,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:10:18,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:18,769 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:10:18,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810924096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:18,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:18,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-13 20:10:18,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583544603] [2021-07-13 20:10:18,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:10:18,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:18,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:10:18,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:10:18,770 INFO L87 Difference]: Start difference. First operand 524 states and 1086 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:18,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:18,898 INFO L93 Difference]: Finished difference Result 816 states and 1639 transitions. [2021-07-13 20:10:18,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:10:18,898 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 20:10:18,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:18,899 INFO L225 Difference]: With dead ends: 816 [2021-07-13 20:10:18,899 INFO L226 Difference]: Without dead ends: 759 [2021-07-13 20:10:18,899 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:10:18,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-07-13 20:10:18,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 557. [2021-07-13 20:10:18,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 2.08273381294964) internal successors, (1158), 556 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:18,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 1158 transitions. [2021-07-13 20:10:18,904 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 1158 transitions. Word has length 41 [2021-07-13 20:10:18,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:18,904 INFO L482 AbstractCegarLoop]: Abstraction has 557 states and 1158 transitions. [2021-07-13 20:10:18,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:18,905 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 1158 transitions. [2021-07-13 20:10:18,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:10:18,905 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:18,905 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:19,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2021-07-13 20:10:19,107 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:19,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:19,107 INFO L82 PathProgramCache]: Analyzing trace with hash 141760501, now seen corresponding path program 126 times [2021-07-13 20:10:19,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:19,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573314982] [2021-07-13 20:10:19,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:19,436 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:19,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:19,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573314982] [2021-07-13 20:10:19,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573314982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:19,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244299247] [2021-07-13 20:10:19,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:19,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 20:10:19,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:19,465 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-13 20:10:19,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:20,052 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:20,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244299247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:20,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:20,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2021-07-13 20:10:20,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390535769] [2021-07-13 20:10:20,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:10:20,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:20,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:10:20,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:10:20,054 INFO L87 Difference]: Start difference. First operand 557 states and 1158 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:27,018 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-07-13 20:10:28,492 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-07-13 20:10:28,652 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2021-07-13 20:10:28,795 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-07-13 20:10:29,888 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2021-07-13 20:10:30,094 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2021-07-13 20:10:30,238 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-07-13 20:10:30,420 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-07-13 20:10:36,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:36,827 INFO L93 Difference]: Finished difference Result 2491 states and 4951 transitions. [2021-07-13 20:10:36,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 263 states. [2021-07-13 20:10:36,828 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 20:10:36,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:36,830 INFO L225 Difference]: With dead ends: 2491 [2021-07-13 20:10:36,830 INFO L226 Difference]: Without dead ends: 2423 [2021-07-13 20:10:36,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32989 ImplicationChecksByTransitivity, 14737.4ms TimeCoverageRelationStatistics Valid=8903, Invalid=67549, Unknown=0, NotChecked=0, Total=76452 [2021-07-13 20:10:36,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-07-13 20:10:36,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 830. [2021-07-13 20:10:36,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 2.1049457177322073) internal successors, (1745), 829 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:36,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1745 transitions. [2021-07-13 20:10:36,845 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1745 transitions. Word has length 41 [2021-07-13 20:10:36,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:36,845 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 1745 transitions. [2021-07-13 20:10:36,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:36,845 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1745 transitions. [2021-07-13 20:10:36,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:10:36,846 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:36,846 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:37,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:37,049 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:37,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:37,049 INFO L82 PathProgramCache]: Analyzing trace with hash -2063910491, now seen corresponding path program 127 times [2021-07-13 20:10:37,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:37,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005782941] [2021-07-13 20:10:37,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:37,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:37,299 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:10:37,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:37,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005782941] [2021-07-13 20:10:37,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005782941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:37,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511348027] [2021-07-13 20:10:37,300 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:37,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:37,330 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:10:37,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:37,858 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:37,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511348027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:37,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:37,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 38 [2021-07-13 20:10:37,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414558090] [2021-07-13 20:10:37,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:10:37,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:37,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:10:37,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:10:37,859 INFO L87 Difference]: Start difference. First operand 830 states and 1745 transitions. Second operand has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:40,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:40,469 INFO L93 Difference]: Finished difference Result 1299 states and 2636 transitions. [2021-07-13 20:10:40,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-13 20:10:40,470 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 20:10:40,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:40,471 INFO L225 Difference]: With dead ends: 1299 [2021-07-13 20:10:40,471 INFO L226 Difference]: Without dead ends: 1267 [2021-07-13 20:10:40,472 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3572 ImplicationChecksByTransitivity, 2415.3ms TimeCoverageRelationStatistics Valid=743, Invalid=9969, Unknown=0, NotChecked=0, Total=10712 [2021-07-13 20:10:40,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-07-13 20:10:40,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 857. [2021-07-13 20:10:40,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 2.100467289719626) internal successors, (1798), 856 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:40,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1798 transitions. [2021-07-13 20:10:40,481 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1798 transitions. Word has length 41 [2021-07-13 20:10:40,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:40,481 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 1798 transitions. [2021-07-13 20:10:40,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:40,481 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1798 transitions. [2021-07-13 20:10:40,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:10:40,482 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:40,482 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:40,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2021-07-13 20:10:40,683 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:40,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:40,683 INFO L82 PathProgramCache]: Analyzing trace with hash -670644875, now seen corresponding path program 128 times [2021-07-13 20:10:40,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:40,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085439487] [2021-07-13 20:10:40,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:40,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:40,912 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:10:40,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:40,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085439487] [2021-07-13 20:10:40,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085439487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:40,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661193054] [2021-07-13 20:10:40,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:40,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:10:40,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:40,944 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:10:40,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:41,463 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:41,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661193054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:41,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:41,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2021-07-13 20:10:41,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459154640] [2021-07-13 20:10:41,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:10:41,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:41,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:10:41,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:10:41,465 INFO L87 Difference]: Start difference. First operand 857 states and 1798 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:43,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:43,714 INFO L93 Difference]: Finished difference Result 1376 states and 2792 transitions. [2021-07-13 20:10:43,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-13 20:10:43,714 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 20:10:43,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:43,716 INFO L225 Difference]: With dead ends: 1376 [2021-07-13 20:10:43,716 INFO L226 Difference]: Without dead ends: 1337 [2021-07-13 20:10:43,716 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2746 ImplicationChecksByTransitivity, 2010.6ms TimeCoverageRelationStatistics Valid=666, Invalid=7890, Unknown=0, NotChecked=0, Total=8556 [2021-07-13 20:10:43,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2021-07-13 20:10:43,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 848. [2021-07-13 20:10:43,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 2.0968122786304604) internal successors, (1776), 847 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:43,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1776 transitions. [2021-07-13 20:10:43,726 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1776 transitions. Word has length 41 [2021-07-13 20:10:43,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:43,726 INFO L482 AbstractCegarLoop]: Abstraction has 848 states and 1776 transitions. [2021-07-13 20:10:43,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:43,727 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1776 transitions. [2021-07-13 20:10:43,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:10:43,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:43,727 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:43,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:43,928 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:43,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:43,928 INFO L82 PathProgramCache]: Analyzing trace with hash 34337835, now seen corresponding path program 129 times [2021-07-13 20:10:43,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:43,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800780945] [2021-07-13 20:10:43,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:44,200 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:10:44,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:44,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800780945] [2021-07-13 20:10:44,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800780945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:44,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106107312] [2021-07-13 20:10:44,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:44,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 20:10:44,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:44,228 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-13 20:10:44,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:44,689 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:44,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106107312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:44,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:44,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-07-13 20:10:44,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421438594] [2021-07-13 20:10:44,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:10:44,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:44,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:10:44,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1288, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:10:44,690 INFO L87 Difference]: Start difference. First operand 848 states and 1776 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:46,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:46,845 INFO L93 Difference]: Finished difference Result 1147 states and 2347 transitions. [2021-07-13 20:10:46,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-13 20:10:46,845 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 20:10:46,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:46,847 INFO L225 Difference]: With dead ends: 1147 [2021-07-13 20:10:46,847 INFO L226 Difference]: Without dead ends: 1089 [2021-07-13 20:10:46,847 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2384 ImplicationChecksByTransitivity, 1948.7ms TimeCoverageRelationStatistics Valid=561, Invalid=7449, Unknown=0, NotChecked=0, Total=8010 [2021-07-13 20:10:46,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-07-13 20:10:46,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 744. [2021-07-13 20:10:46,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 743 states have (on average 2.1049798115746974) internal successors, (1564), 743 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:46,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1564 transitions. [2021-07-13 20:10:46,854 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1564 transitions. Word has length 41 [2021-07-13 20:10:46,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:46,854 INFO L482 AbstractCegarLoop]: Abstraction has 744 states and 1564 transitions. [2021-07-13 20:10:46,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:46,855 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1564 transitions. [2021-07-13 20:10:46,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:10:46,855 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:46,855 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:47,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-07-13 20:10:47,056 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:47,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:47,056 INFO L82 PathProgramCache]: Analyzing trace with hash -749611727, now seen corresponding path program 130 times [2021-07-13 20:10:47,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:47,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852659064] [2021-07-13 20:10:47,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:47,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 28 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:10:47,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:47,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852659064] [2021-07-13 20:10:47,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852659064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:47,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345670409] [2021-07-13 20:10:47,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:47,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:10:47,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:47,310 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-13 20:10:47,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:47,878 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:47,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345670409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:47,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:47,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2021-07-13 20:10:47,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406874951] [2021-07-13 20:10:47,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:10:47,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:47,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:10:47,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1214, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:10:47,879 INFO L87 Difference]: Start difference. First operand 744 states and 1564 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:49,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:49,202 INFO L93 Difference]: Finished difference Result 1254 states and 2587 transitions. [2021-07-13 20:10:49,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:10:49,202 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 20:10:49,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:49,204 INFO L225 Difference]: With dead ends: 1254 [2021-07-13 20:10:49,204 INFO L226 Difference]: Without dead ends: 1240 [2021-07-13 20:10:49,204 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1263.1ms TimeCoverageRelationStatistics Valid=616, Invalid=3416, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:10:49,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-07-13 20:10:49,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 653. [2021-07-13 20:10:49,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 2.1165644171779143) internal successors, (1380), 652 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:49,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1380 transitions. [2021-07-13 20:10:49,212 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1380 transitions. Word has length 41 [2021-07-13 20:10:49,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:49,212 INFO L482 AbstractCegarLoop]: Abstraction has 653 states and 1380 transitions. [2021-07-13 20:10:49,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:49,212 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1380 transitions. [2021-07-13 20:10:49,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:10:49,212 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:49,212 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:49,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:49,413 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:49,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:49,413 INFO L82 PathProgramCache]: Analyzing trace with hash -2073348345, now seen corresponding path program 131 times [2021-07-13 20:10:49,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:49,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813185735] [2021-07-13 20:10:49,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:49,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:49,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:49,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813185735] [2021-07-13 20:10:49,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813185735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:49,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569025694] [2021-07-13 20:10:49,671 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:49,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 20:10:49,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:49,699 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-13 20:10:49,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:50,257 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:50,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569025694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:50,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:50,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 36 [2021-07-13 20:10:50,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034690093] [2021-07-13 20:10:50,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:10:50,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:50,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:10:50,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:10:50,258 INFO L87 Difference]: Start difference. First operand 653 states and 1380 transitions. Second operand has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:00,139 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2021-07-13 20:11:00,772 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2021-07-13 20:11:02,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:02,046 INFO L93 Difference]: Finished difference Result 2177 states and 4455 transitions. [2021-07-13 20:11:02,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2021-07-13 20:11:02,046 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 20:11:02,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:02,049 INFO L225 Difference]: With dead ends: 2177 [2021-07-13 20:11:02,050 INFO L226 Difference]: Without dead ends: 2151 [2021-07-13 20:11:02,052 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17707 ImplicationChecksByTransitivity, 10429.2ms TimeCoverageRelationStatistics Valid=4996, Invalid=38894, Unknown=0, NotChecked=0, Total=43890 [2021-07-13 20:11:02,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2021-07-13 20:11:02,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 701. [2021-07-13 20:11:02,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 2.1085714285714285) internal successors, (1476), 700 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:02,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1476 transitions. [2021-07-13 20:11:02,064 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1476 transitions. Word has length 41 [2021-07-13 20:11:02,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:02,064 INFO L482 AbstractCegarLoop]: Abstraction has 701 states and 1476 transitions. [2021-07-13 20:11:02,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:02,064 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1476 transitions. [2021-07-13 20:11:02,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:11:02,065 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:02,065 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:02,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-07-13 20:11:02,266 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:02,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:02,266 INFO L82 PathProgramCache]: Analyzing trace with hash 905857747, now seen corresponding path program 132 times [2021-07-13 20:11:02,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:02,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606065617] [2021-07-13 20:11:02,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:02,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:02,575 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:02,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:02,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606065617] [2021-07-13 20:11:02,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606065617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:02,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166766222] [2021-07-13 20:11:02,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:02,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 20:11:02,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:02,613 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 60 conjunts are in the unsatisfiable core [2021-07-13 20:11:02,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:03,242 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:03,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166766222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:03,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:03,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-13 20:11:03,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744035741] [2021-07-13 20:11:03,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:11:03,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:03,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:11:03,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1616, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:11:03,243 INFO L87 Difference]: Start difference. First operand 701 states and 1476 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:05,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:05,890 INFO L93 Difference]: Finished difference Result 1425 states and 2940 transitions. [2021-07-13 20:11:05,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-07-13 20:11:05,895 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:11:05,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:05,897 INFO L225 Difference]: With dead ends: 1425 [2021-07-13 20:11:05,897 INFO L226 Difference]: Without dead ends: 1352 [2021-07-13 20:11:05,898 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2973 ImplicationChecksByTransitivity, 2742.3ms TimeCoverageRelationStatistics Valid=1356, Invalid=9564, Unknown=0, NotChecked=0, Total=10920 [2021-07-13 20:11:05,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2021-07-13 20:11:05,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 879. [2021-07-13 20:11:05,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 2.1890660592255125) internal successors, (1922), 878 states have internal predecessors, (1922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:05,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1922 transitions. [2021-07-13 20:11:05,908 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1922 transitions. Word has length 43 [2021-07-13 20:11:05,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:05,908 INFO L482 AbstractCegarLoop]: Abstraction has 879 states and 1922 transitions. [2021-07-13 20:11:05,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:05,908 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1922 transitions. [2021-07-13 20:11:05,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:11:05,909 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:05,909 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:06,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable306 [2021-07-13 20:11:06,125 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:06,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:06,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1027861339, now seen corresponding path program 133 times [2021-07-13 20:11:06,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:06,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560096090] [2021-07-13 20:11:06,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:06,426 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:06,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:06,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560096090] [2021-07-13 20:11:06,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560096090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:06,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471471849] [2021-07-13 20:11:06,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:06,453 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:11:06,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:06,941 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:06,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471471849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:06,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:06,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-13 20:11:06,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000317197] [2021-07-13 20:11:06,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:11:06,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:06,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:11:06,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1607, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:11:06,942 INFO L87 Difference]: Start difference. First operand 879 states and 1922 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:09,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:09,345 INFO L93 Difference]: Finished difference Result 1463 states and 3003 transitions. [2021-07-13 20:11:09,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-13 20:11:09,346 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:11:09,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:09,347 INFO L225 Difference]: With dead ends: 1463 [2021-07-13 20:11:09,347 INFO L226 Difference]: Without dead ends: 1401 [2021-07-13 20:11:09,348 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3582 ImplicationChecksByTransitivity, 2451.9ms TimeCoverageRelationStatistics Valid=1457, Invalid=10533, Unknown=0, NotChecked=0, Total=11990 [2021-07-13 20:11:09,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-07-13 20:11:09,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 881. [2021-07-13 20:11:09,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 880 states have (on average 2.1886363636363635) internal successors, (1926), 880 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:09,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1926 transitions. [2021-07-13 20:11:09,359 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1926 transitions. Word has length 43 [2021-07-13 20:11:09,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:09,359 INFO L482 AbstractCegarLoop]: Abstraction has 881 states and 1926 transitions. [2021-07-13 20:11:09,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:09,359 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1926 transitions. [2021-07-13 20:11:09,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:11:09,360 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:09,360 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:09,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-07-13 20:11:09,560 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:09,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:09,561 INFO L82 PathProgramCache]: Analyzing trace with hash -475713121, now seen corresponding path program 134 times [2021-07-13 20:11:09,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:09,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835089559] [2021-07-13 20:11:09,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:09,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:09,855 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:09,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:09,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835089559] [2021-07-13 20:11:09,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835089559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:09,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026026602] [2021-07-13 20:11:09,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:09,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:11:09,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:09,881 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:11:09,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:10,377 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:10,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026026602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:10,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:10,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-13 20:11:10,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2580932] [2021-07-13 20:11:10,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:11:10,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:10,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:11:10,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:11:10,378 INFO L87 Difference]: Start difference. First operand 881 states and 1926 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:13,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:13,097 INFO L93 Difference]: Finished difference Result 1461 states and 3001 transitions. [2021-07-13 20:11:13,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-07-13 20:11:13,098 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:11:13,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:13,099 INFO L225 Difference]: With dead ends: 1461 [2021-07-13 20:11:13,099 INFO L226 Difference]: Without dead ends: 1405 [2021-07-13 20:11:13,100 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3969 ImplicationChecksByTransitivity, 2569.0ms TimeCoverageRelationStatistics Valid=1554, Invalid=11556, Unknown=0, NotChecked=0, Total=13110 [2021-07-13 20:11:13,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2021-07-13 20:11:13,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 883. [2021-07-13 20:11:13,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 882 states have (on average 2.188208616780045) internal successors, (1930), 882 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:13,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1930 transitions. [2021-07-13 20:11:13,110 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1930 transitions. Word has length 43 [2021-07-13 20:11:13,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:13,110 INFO L482 AbstractCegarLoop]: Abstraction has 883 states and 1930 transitions. [2021-07-13 20:11:13,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:13,110 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1930 transitions. [2021-07-13 20:11:13,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:11:13,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:13,111 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:13,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-07-13 20:11:13,311 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:13,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:13,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1667971299, now seen corresponding path program 135 times [2021-07-13 20:11:13,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:13,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442735343] [2021-07-13 20:11:13,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:13,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:13,607 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:13,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:13,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442735343] [2021-07-13 20:11:13,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442735343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:13,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885906720] [2021-07-13 20:11:13,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:13,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 20:11:13,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:13,636 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:11:13,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:14,142 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:14,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885906720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:14,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:14,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-13 20:11:14,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970469481] [2021-07-13 20:11:14,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:11:14,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:14,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:11:14,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:11:14,143 INFO L87 Difference]: Start difference. First operand 883 states and 1930 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:16,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:16,963 INFO L93 Difference]: Finished difference Result 1459 states and 2999 transitions. [2021-07-13 20:11:16,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-07-13 20:11:16,963 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:11:16,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:16,965 INFO L225 Difference]: With dead ends: 1459 [2021-07-13 20:11:16,965 INFO L226 Difference]: Without dead ends: 1409 [2021-07-13 20:11:16,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4376 ImplicationChecksByTransitivity, 2705.7ms TimeCoverageRelationStatistics Valid=1676, Invalid=12604, Unknown=0, NotChecked=0, Total=14280 [2021-07-13 20:11:16,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2021-07-13 20:11:16,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 885. [2021-07-13 20:11:16,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 2.1877828054298645) internal successors, (1934), 884 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:16,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1934 transitions. [2021-07-13 20:11:16,975 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1934 transitions. Word has length 43 [2021-07-13 20:11:16,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:16,975 INFO L482 AbstractCegarLoop]: Abstraction has 885 states and 1934 transitions. [2021-07-13 20:11:16,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:16,975 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1934 transitions. [2021-07-13 20:11:16,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:11:16,976 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:16,976 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:17,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-07-13 20:11:17,176 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:17,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:17,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1596833497, now seen corresponding path program 136 times [2021-07-13 20:11:17,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:17,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738821698] [2021-07-13 20:11:17,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:17,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:17,466 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:17,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:17,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738821698] [2021-07-13 20:11:17,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738821698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:17,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49021236] [2021-07-13 20:11:17,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:17,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:11:17,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:17,493 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:11:17,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:17,980 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:17,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49021236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:17,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:17,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-13 20:11:17,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931938963] [2021-07-13 20:11:17,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:11:17,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:17,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:11:17,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1607, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:11:17,982 INFO L87 Difference]: Start difference. First operand 885 states and 1934 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:21,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:21,078 INFO L93 Difference]: Finished difference Result 1457 states and 2997 transitions. [2021-07-13 20:11:21,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-07-13 20:11:21,078 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:11:21,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:21,080 INFO L225 Difference]: With dead ends: 1457 [2021-07-13 20:11:21,080 INFO L226 Difference]: Without dead ends: 1413 [2021-07-13 20:11:21,081 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4799 ImplicationChecksByTransitivity, 2818.7ms TimeCoverageRelationStatistics Valid=1823, Invalid=13677, Unknown=0, NotChecked=0, Total=15500 [2021-07-13 20:11:21,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2021-07-13 20:11:21,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 887. [2021-07-13 20:11:21,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 2.1873589164785554) internal successors, (1938), 886 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:21,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1938 transitions. [2021-07-13 20:11:21,091 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1938 transitions. Word has length 43 [2021-07-13 20:11:21,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:21,091 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 1938 transitions. [2021-07-13 20:11:21,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:21,091 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1938 transitions. [2021-07-13 20:11:21,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:11:21,092 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:21,092 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:21,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-07-13 20:11:21,293 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:21,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:21,293 INFO L82 PathProgramCache]: Analyzing trace with hash -500790677, now seen corresponding path program 137 times [2021-07-13 20:11:21,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:21,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182802872] [2021-07-13 20:11:21,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:21,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:21,579 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:21,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:21,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182802872] [2021-07-13 20:11:21,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182802872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:21,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137969551] [2021-07-13 20:11:21,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:21,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:11:21,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:21,608 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:11:21,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:22,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137969551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:22,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:22,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-13 20:11:22,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367492694] [2021-07-13 20:11:22,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:11:22,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:22,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:11:22,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:11:22,104 INFO L87 Difference]: Start difference. First operand 887 states and 1938 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:25,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:25,442 INFO L93 Difference]: Finished difference Result 1457 states and 2999 transitions. [2021-07-13 20:11:25,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-07-13 20:11:25,443 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:11:25,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:25,444 INFO L225 Difference]: With dead ends: 1457 [2021-07-13 20:11:25,444 INFO L226 Difference]: Without dead ends: 1419 [2021-07-13 20:11:25,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5238 ImplicationChecksByTransitivity, 2977.4ms TimeCoverageRelationStatistics Valid=1995, Invalid=14775, Unknown=0, NotChecked=0, Total=16770 [2021-07-13 20:11:25,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2021-07-13 20:11:25,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 889. [2021-07-13 20:11:25,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 2.186936936936937) internal successors, (1942), 888 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:25,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1942 transitions. [2021-07-13 20:11:25,470 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1942 transitions. Word has length 43 [2021-07-13 20:11:25,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:25,470 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 1942 transitions. [2021-07-13 20:11:25,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:25,470 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1942 transitions. [2021-07-13 20:11:25,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:11:25,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:25,471 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:25,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-07-13 20:11:25,685 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:25,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:25,685 INFO L82 PathProgramCache]: Analyzing trace with hash 331633839, now seen corresponding path program 138 times [2021-07-13 20:11:25,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:25,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560116570] [2021-07-13 20:11:25,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:25,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:26,015 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:26,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:26,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560116570] [2021-07-13 20:11:26,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560116570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:26,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490742360] [2021-07-13 20:11:26,015 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:26,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 20:11:26,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:26,044 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:11:26,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:26,570 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:26,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490742360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:26,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:26,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-13 20:11:26,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603318629] [2021-07-13 20:11:26,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:11:26,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:26,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:11:26,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1584, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:11:26,571 INFO L87 Difference]: Start difference. First operand 889 states and 1942 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:30,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:30,290 INFO L93 Difference]: Finished difference Result 1520 states and 3112 transitions. [2021-07-13 20:11:30,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-07-13 20:11:30,291 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:11:30,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:30,292 INFO L225 Difference]: With dead ends: 1520 [2021-07-13 20:11:30,293 INFO L226 Difference]: Without dead ends: 1475 [2021-07-13 20:11:30,293 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5546 ImplicationChecksByTransitivity, 3319.1ms TimeCoverageRelationStatistics Valid=2173, Invalid=15649, Unknown=0, NotChecked=0, Total=17822 [2021-07-13 20:11:30,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2021-07-13 20:11:30,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 892. [2021-07-13 20:11:30,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 2.1885521885521886) internal successors, (1950), 891 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:30,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1950 transitions. [2021-07-13 20:11:30,303 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1950 transitions. Word has length 43 [2021-07-13 20:11:30,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:30,303 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 1950 transitions. [2021-07-13 20:11:30,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:30,304 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1950 transitions. [2021-07-13 20:11:30,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:11:30,304 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:30,305 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:30,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-07-13 20:11:30,505 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:30,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:30,505 INFO L82 PathProgramCache]: Analyzing trace with hash -933294021, now seen corresponding path program 139 times [2021-07-13 20:11:30,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:30,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572395446] [2021-07-13 20:11:30,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:30,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:30,838 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:30,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:30,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572395446] [2021-07-13 20:11:30,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572395446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:30,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65007975] [2021-07-13 20:11:30,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:30,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:30,864 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:11:30,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:31,359 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:31,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65007975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:31,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:31,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-13 20:11:31,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472247017] [2021-07-13 20:11:31,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:11:31,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:31,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:11:31,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1582, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:11:31,361 INFO L87 Difference]: Start difference. First operand 892 states and 1950 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:34,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:34,513 INFO L93 Difference]: Finished difference Result 1310 states and 2689 transitions. [2021-07-13 20:11:34,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-07-13 20:11:34,513 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:11:34,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:34,515 INFO L225 Difference]: With dead ends: 1310 [2021-07-13 20:11:34,515 INFO L226 Difference]: Without dead ends: 1290 [2021-07-13 20:11:34,516 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4570 ImplicationChecksByTransitivity, 3000.3ms TimeCoverageRelationStatistics Valid=1991, Invalid=13015, Unknown=0, NotChecked=0, Total=15006 [2021-07-13 20:11:34,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2021-07-13 20:11:34,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 893. [2021-07-13 20:11:34,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 2.188340807174888) internal successors, (1952), 892 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:34,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1952 transitions. [2021-07-13 20:11:34,525 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1952 transitions. Word has length 43 [2021-07-13 20:11:34,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:34,525 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 1952 transitions. [2021-07-13 20:11:34,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:34,525 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1952 transitions. [2021-07-13 20:11:34,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:11:34,526 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:34,526 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:34,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-07-13 20:11:34,727 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:34,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:34,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1154201253, now seen corresponding path program 140 times [2021-07-13 20:11:34,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:34,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994618094] [2021-07-13 20:11:34,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:34,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:35,013 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:35,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:35,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994618094] [2021-07-13 20:11:35,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994618094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:35,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894191773] [2021-07-13 20:11:35,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:35,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:11:35,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:35,039 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:11:35,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:35,540 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:35,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894191773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:35,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:35,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-13 20:11:35,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985814783] [2021-07-13 20:11:35,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:11:35,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:35,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:11:35,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1600, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:11:35,542 INFO L87 Difference]: Start difference. First operand 893 states and 1952 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:38,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:38,059 INFO L93 Difference]: Finished difference Result 1424 states and 2924 transitions. [2021-07-13 20:11:38,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-13 20:11:38,059 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:11:38,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:38,061 INFO L225 Difference]: With dead ends: 1424 [2021-07-13 20:11:38,061 INFO L226 Difference]: Without dead ends: 1368 [2021-07-13 20:11:38,062 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3626 ImplicationChecksByTransitivity, 2412.1ms TimeCoverageRelationStatistics Valid=1364, Invalid=10626, Unknown=0, NotChecked=0, Total=11990 [2021-07-13 20:11:38,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2021-07-13 20:11:38,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 899. [2021-07-13 20:11:38,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 2.1870824053452114) internal successors, (1964), 898 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:38,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1964 transitions. [2021-07-13 20:11:38,071 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1964 transitions. Word has length 43 [2021-07-13 20:11:38,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:38,071 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 1964 transitions. [2021-07-13 20:11:38,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:38,071 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1964 transitions. [2021-07-13 20:11:38,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:11:38,072 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:38,072 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:38,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:38,273 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:38,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:38,273 INFO L82 PathProgramCache]: Analyzing trace with hash -997081623, now seen corresponding path program 141 times [2021-07-13 20:11:38,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:38,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623403699] [2021-07-13 20:11:38,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:38,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:38,562 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:38,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:38,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623403699] [2021-07-13 20:11:38,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623403699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:38,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246886730] [2021-07-13 20:11:38,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:38,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 20:11:38,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:38,592 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:11:38,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:39,093 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:39,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246886730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:39,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:39,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-13 20:11:39,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311051535] [2021-07-13 20:11:39,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:11:39,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:39,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:11:39,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1600, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:11:39,094 INFO L87 Difference]: Start difference. First operand 899 states and 1964 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:41,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:41,716 INFO L93 Difference]: Finished difference Result 1429 states and 2948 transitions. [2021-07-13 20:11:41,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-07-13 20:11:41,716 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:11:41,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:41,718 INFO L225 Difference]: With dead ends: 1429 [2021-07-13 20:11:41,718 INFO L226 Difference]: Without dead ends: 1379 [2021-07-13 20:11:41,718 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4011 ImplicationChecksByTransitivity, 2555.7ms TimeCoverageRelationStatistics Valid=1495, Invalid=11615, Unknown=0, NotChecked=0, Total=13110 [2021-07-13 20:11:41,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2021-07-13 20:11:41,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 909. [2021-07-13 20:11:41,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 908 states have (on average 2.193832599118943) internal successors, (1992), 908 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:41,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1992 transitions. [2021-07-13 20:11:41,728 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1992 transitions. Word has length 43 [2021-07-13 20:11:41,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:41,728 INFO L482 AbstractCegarLoop]: Abstraction has 909 states and 1992 transitions. [2021-07-13 20:11:41,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:41,728 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1992 transitions. [2021-07-13 20:11:41,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:11:41,729 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:41,729 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:41,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:41,929 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:41,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:41,930 INFO L82 PathProgramCache]: Analyzing trace with hash 33080877, now seen corresponding path program 142 times [2021-07-13 20:11:41,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:41,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499334756] [2021-07-13 20:11:41,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:41,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:42,227 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:42,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:42,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499334756] [2021-07-13 20:11:42,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499334756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:42,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106031220] [2021-07-13 20:11:42,227 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:42,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:11:42,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:42,253 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:11:42,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:42,748 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:42,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106031220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:42,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:42,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-13 20:11:42,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745125093] [2021-07-13 20:11:42,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:11:42,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:42,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:11:42,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1596, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:11:42,749 INFO L87 Difference]: Start difference. First operand 909 states and 1992 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:45,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:45,632 INFO L93 Difference]: Finished difference Result 1441 states and 2986 transitions. [2021-07-13 20:11:45,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-07-13 20:11:45,632 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:11:45,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:45,634 INFO L225 Difference]: With dead ends: 1441 [2021-07-13 20:11:45,634 INFO L226 Difference]: Without dead ends: 1397 [2021-07-13 20:11:45,634 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4409 ImplicationChecksByTransitivity, 2662.5ms TimeCoverageRelationStatistics Valid=1642, Invalid=12638, Unknown=0, NotChecked=0, Total=14280 [2021-07-13 20:11:45,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-07-13 20:11:45,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 919. [2021-07-13 20:11:45,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 2.2004357298474946) internal successors, (2020), 918 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:45,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2020 transitions. [2021-07-13 20:11:45,644 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2020 transitions. Word has length 43 [2021-07-13 20:11:45,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:45,644 INFO L482 AbstractCegarLoop]: Abstraction has 919 states and 2020 transitions. [2021-07-13 20:11:45,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:45,644 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2020 transitions. [2021-07-13 20:11:45,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:11:45,645 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:45,645 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:45,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable329 [2021-07-13 20:11:45,845 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:45,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:45,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1129123697, now seen corresponding path program 143 times [2021-07-13 20:11:45,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:45,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235064257] [2021-07-13 20:11:45,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:45,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:46,132 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:46,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:46,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235064257] [2021-07-13 20:11:46,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235064257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:46,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156921388] [2021-07-13 20:11:46,132 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:46,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:11:46,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:46,160 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:11:46,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:46,653 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:46,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156921388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:46,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:46,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-13 20:11:46,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894654647] [2021-07-13 20:11:46,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:11:46,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:46,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:11:46,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1588, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:11:46,655 INFO L87 Difference]: Start difference. First operand 919 states and 2020 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:49,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:49,652 INFO L93 Difference]: Finished difference Result 1453 states and 3024 transitions. [2021-07-13 20:11:49,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-07-13 20:11:49,652 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:11:49,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:49,654 INFO L225 Difference]: With dead ends: 1453 [2021-07-13 20:11:49,654 INFO L226 Difference]: Without dead ends: 1415 [2021-07-13 20:11:49,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4823 ImplicationChecksByTransitivity, 2792.4ms TimeCoverageRelationStatistics Valid=1814, Invalid=13686, Unknown=0, NotChecked=0, Total=15500 [2021-07-13 20:11:49,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-07-13 20:11:49,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 929. [2021-07-13 20:11:49,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 2.206896551724138) internal successors, (2048), 928 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:49,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 2048 transitions. [2021-07-13 20:11:49,664 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 2048 transitions. Word has length 43 [2021-07-13 20:11:49,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:49,664 INFO L482 AbstractCegarLoop]: Abstraction has 929 states and 2048 transitions. [2021-07-13 20:11:49,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:49,664 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 2048 transitions. [2021-07-13 20:11:49,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:11:49,665 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:49,665 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:49,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:49,866 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:49,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:49,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1961548213, now seen corresponding path program 144 times [2021-07-13 20:11:49,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:49,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296106932] [2021-07-13 20:11:49,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:49,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:50,192 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:50,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:50,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296106932] [2021-07-13 20:11:50,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296106932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:50,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285434461] [2021-07-13 20:11:50,192 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:50,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 20:11:50,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:50,221 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:11:50,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:50,719 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:50,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285434461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:50,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:50,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-13 20:11:50,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278675617] [2021-07-13 20:11:50,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:11:50,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:50,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:11:50,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1573, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:11:50,720 INFO L87 Difference]: Start difference. First operand 929 states and 2048 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:54,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:54,136 INFO L93 Difference]: Finished difference Result 1551 states and 3204 transitions. [2021-07-13 20:11:54,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-07-13 20:11:54,136 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:11:54,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:54,138 INFO L225 Difference]: With dead ends: 1551 [2021-07-13 20:11:54,138 INFO L226 Difference]: Without dead ends: 1506 [2021-07-13 20:11:54,139 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5113 ImplicationChecksByTransitivity, 3132.4ms TimeCoverageRelationStatistics Valid=1995, Invalid=14517, Unknown=0, NotChecked=0, Total=16512 [2021-07-13 20:11:54,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-07-13 20:11:54,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 933. [2021-07-13 20:11:54,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 932 states have (on average 2.209227467811159) internal successors, (2059), 932 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:54,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 2059 transitions. [2021-07-13 20:11:54,149 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 2059 transitions. Word has length 43 [2021-07-13 20:11:54,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:54,149 INFO L482 AbstractCegarLoop]: Abstraction has 933 states and 2059 transitions. [2021-07-13 20:11:54,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:54,149 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 2059 transitions. [2021-07-13 20:11:54,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:11:54,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:54,150 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:54,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-07-13 20:11:54,350 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:54,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:54,351 INFO L82 PathProgramCache]: Analyzing trace with hash 696620353, now seen corresponding path program 145 times [2021-07-13 20:11:54,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:54,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78866819] [2021-07-13 20:11:54,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:54,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:54,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:54,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78866819] [2021-07-13 20:11:54,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78866819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:54,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088462244] [2021-07-13 20:11:54,672 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:54,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:54,697 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:11:54,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:55,198 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:55,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088462244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:55,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:55,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-13 20:11:55,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769412233] [2021-07-13 20:11:55,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:11:55,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:55,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:11:55,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1571, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:11:55,200 INFO L87 Difference]: Start difference. First operand 933 states and 2059 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:58,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:58,290 INFO L93 Difference]: Finished difference Result 1369 states and 2846 transitions. [2021-07-13 20:11:58,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-07-13 20:11:58,290 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:11:58,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:58,292 INFO L225 Difference]: With dead ends: 1369 [2021-07-13 20:11:58,292 INFO L226 Difference]: Without dead ends: 1342 [2021-07-13 20:11:58,293 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4340 ImplicationChecksByTransitivity, 2914.9ms TimeCoverageRelationStatistics Valid=1899, Invalid=12381, Unknown=0, NotChecked=0, Total=14280 [2021-07-13 20:11:58,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-07-13 20:11:58,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 901. [2021-07-13 20:11:58,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 2.1933333333333334) internal successors, (1974), 900 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:58,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1974 transitions. [2021-07-13 20:11:58,302 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1974 transitions. Word has length 43 [2021-07-13 20:11:58,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:58,302 INFO L482 AbstractCegarLoop]: Abstraction has 901 states and 1974 transitions. [2021-07-13 20:11:58,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:58,302 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1974 transitions. [2021-07-13 20:11:58,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:11:58,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:58,303 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:58,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-07-13 20:11:58,504 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:58,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:58,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1503474267, now seen corresponding path program 146 times [2021-07-13 20:11:58,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:58,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426703587] [2021-07-13 20:11:58,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:58,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:58,771 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:58,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:58,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426703587] [2021-07-13 20:11:58,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426703587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:58,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932742279] [2021-07-13 20:11:58,772 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:58,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:11:58,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:58,797 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:11:58,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:59,300 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:59,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932742279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:59,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:59,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-13 20:11:59,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333426493] [2021-07-13 20:11:59,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:11:59,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:59,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:11:59,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1598, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:11:59,301 INFO L87 Difference]: Start difference. First operand 901 states and 1974 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:01,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:01,925 INFO L93 Difference]: Finished difference Result 1397 states and 2882 transitions. [2021-07-13 20:12:01,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-07-13 20:12:01,926 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:12:01,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:01,927 INFO L225 Difference]: With dead ends: 1397 [2021-07-13 20:12:01,927 INFO L226 Difference]: Without dead ends: 1347 [2021-07-13 20:12:01,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4136 ImplicationChecksByTransitivity, 2492.6ms TimeCoverageRelationStatistics Valid=1473, Invalid=11867, Unknown=0, NotChecked=0, Total=13340 [2021-07-13 20:12:01,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2021-07-13 20:12:01,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 905. [2021-07-13 20:12:01,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 2.1924778761061945) internal successors, (1982), 904 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:01,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1982 transitions. [2021-07-13 20:12:01,937 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1982 transitions. Word has length 43 [2021-07-13 20:12:01,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:01,937 INFO L482 AbstractCegarLoop]: Abstraction has 905 states and 1982 transitions. [2021-07-13 20:12:01,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:01,938 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1982 transitions. [2021-07-13 20:12:01,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:12:01,938 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:01,938 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:02,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-07-13 20:12:02,139 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:02,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:02,139 INFO L82 PathProgramCache]: Analyzing trace with hash -473311767, now seen corresponding path program 147 times [2021-07-13 20:12:02,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:02,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278057338] [2021-07-13 20:12:02,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:02,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:02,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:02,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278057338] [2021-07-13 20:12:02,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278057338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:02,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983976834] [2021-07-13 20:12:02,428 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:02,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 20:12:02,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:02,457 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:12:02,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:02,957 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:02,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983976834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:02,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:02,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-13 20:12:02,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888297605] [2021-07-13 20:12:02,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:12:02,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:02,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:12:02,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1592, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:12:02,958 INFO L87 Difference]: Start difference. First operand 905 states and 1982 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:05,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:05,714 INFO L93 Difference]: Finished difference Result 1410 states and 2922 transitions. [2021-07-13 20:12:05,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-07-13 20:12:05,714 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:12:05,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:05,716 INFO L225 Difference]: With dead ends: 1410 [2021-07-13 20:12:05,716 INFO L226 Difference]: Without dead ends: 1366 [2021-07-13 20:12:05,717 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4542 ImplicationChecksByTransitivity, 2690.8ms TimeCoverageRelationStatistics Valid=1643, Invalid=12877, Unknown=0, NotChecked=0, Total=14520 [2021-07-13 20:12:05,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2021-07-13 20:12:05,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 915. [2021-07-13 20:12:05,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 2.199124726477024) internal successors, (2010), 914 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:05,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 2010 transitions. [2021-07-13 20:12:05,727 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 2010 transitions. Word has length 43 [2021-07-13 20:12:05,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:05,727 INFO L482 AbstractCegarLoop]: Abstraction has 915 states and 2010 transitions. [2021-07-13 20:12:05,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:05,727 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 2010 transitions. [2021-07-13 20:12:05,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:12:05,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:05,728 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:05,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-07-13 20:12:05,928 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:05,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:05,929 INFO L82 PathProgramCache]: Analyzing trace with hash 622731053, now seen corresponding path program 148 times [2021-07-13 20:12:05,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:05,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491316245] [2021-07-13 20:12:05,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:05,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:06,218 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:06,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:06,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491316245] [2021-07-13 20:12:06,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491316245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:06,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927026257] [2021-07-13 20:12:06,218 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:06,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:12:06,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:06,245 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:12:06,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:06,750 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:06,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927026257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:06,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:06,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-13 20:12:06,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326816765] [2021-07-13 20:12:06,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:12:06,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:06,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:12:06,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1584, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:12:06,751 INFO L87 Difference]: Start difference. First operand 915 states and 2010 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:09,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:09,795 INFO L93 Difference]: Finished difference Result 1428 states and 2972 transitions. [2021-07-13 20:12:09,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-07-13 20:12:09,796 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:12:09,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:09,798 INFO L225 Difference]: With dead ends: 1428 [2021-07-13 20:12:09,798 INFO L226 Difference]: Without dead ends: 1390 [2021-07-13 20:12:09,798 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4957 ImplicationChecksByTransitivity, 2842.3ms TimeCoverageRelationStatistics Valid=1824, Invalid=13926, Unknown=0, NotChecked=0, Total=15750 [2021-07-13 20:12:09,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-07-13 20:12:09,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 925. [2021-07-13 20:12:09,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 2.205627705627706) internal successors, (2038), 924 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:09,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 2038 transitions. [2021-07-13 20:12:09,808 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 2038 transitions. Word has length 43 [2021-07-13 20:12:09,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:09,809 INFO L482 AbstractCegarLoop]: Abstraction has 925 states and 2038 transitions. [2021-07-13 20:12:09,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:09,809 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 2038 transitions. [2021-07-13 20:12:09,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:12:09,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:09,810 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:10,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-07-13 20:12:10,010 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:10,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:10,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1455155569, now seen corresponding path program 149 times [2021-07-13 20:12:10,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:10,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277710820] [2021-07-13 20:12:10,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:10,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:10,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:10,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277710820] [2021-07-13 20:12:10,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277710820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:10,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627620315] [2021-07-13 20:12:10,336 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:10,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:12:10,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:10,365 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:12:10,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:10,867 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:10,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627620315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:10,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:10,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-13 20:12:10,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969304905] [2021-07-13 20:12:10,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:12:10,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:10,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:12:10,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1569, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:12:10,868 INFO L87 Difference]: Start difference. First operand 925 states and 2038 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:14,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:14,310 INFO L93 Difference]: Finished difference Result 1532 states and 3164 transitions. [2021-07-13 20:12:14,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-07-13 20:12:14,310 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:12:14,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:14,312 INFO L225 Difference]: With dead ends: 1532 [2021-07-13 20:12:14,312 INFO L226 Difference]: Without dead ends: 1487 [2021-07-13 20:12:14,313 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5247 ImplicationChecksByTransitivity, 3229.5ms TimeCoverageRelationStatistics Valid=2014, Invalid=14756, Unknown=0, NotChecked=0, Total=16770 [2021-07-13 20:12:14,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2021-07-13 20:12:14,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 929. [2021-07-13 20:12:14,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 2.2079741379310347) internal successors, (2049), 928 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:14,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 2049 transitions. [2021-07-13 20:12:14,324 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 2049 transitions. Word has length 43 [2021-07-13 20:12:14,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:14,324 INFO L482 AbstractCegarLoop]: Abstraction has 929 states and 2049 transitions. [2021-07-13 20:12:14,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:14,324 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 2049 transitions. [2021-07-13 20:12:14,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:12:14,325 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:14,325 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:14,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2021-07-13 20:12:14,525 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:14,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:14,526 INFO L82 PathProgramCache]: Analyzing trace with hash 190227709, now seen corresponding path program 150 times [2021-07-13 20:12:14,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:14,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686338022] [2021-07-13 20:12:14,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:14,866 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:14,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:14,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686338022] [2021-07-13 20:12:14,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686338022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:14,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499944553] [2021-07-13 20:12:14,866 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:14,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 20:12:14,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:14,896 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 63 conjunts are in the unsatisfiable core [2021-07-13 20:12:14,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:15,464 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:15,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499944553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:15,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:15,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-13 20:12:15,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706499823] [2021-07-13 20:12:15,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:12:15,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:15,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:12:15,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1575, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:12:15,466 INFO L87 Difference]: Start difference. First operand 929 states and 2049 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:18,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:18,681 INFO L93 Difference]: Finished difference Result 1359 states and 2823 transitions. [2021-07-13 20:12:18,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-07-13 20:12:18,681 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:12:18,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:18,683 INFO L225 Difference]: With dead ends: 1359 [2021-07-13 20:12:18,683 INFO L226 Difference]: Without dead ends: 1332 [2021-07-13 20:12:18,683 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4383 ImplicationChecksByTransitivity, 3209.8ms TimeCoverageRelationStatistics Valid=1914, Invalid=12606, Unknown=0, NotChecked=0, Total=14520 [2021-07-13 20:12:18,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2021-07-13 20:12:18,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 881. [2021-07-13 20:12:18,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 880 states have (on average 2.1818181818181817) internal successors, (1920), 880 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:18,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1920 transitions. [2021-07-13 20:12:18,693 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1920 transitions. Word has length 43 [2021-07-13 20:12:18,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:18,693 INFO L482 AbstractCegarLoop]: Abstraction has 881 states and 1920 transitions. [2021-07-13 20:12:18,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:18,693 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1920 transitions. [2021-07-13 20:12:18,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:12:18,694 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:18,694 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:18,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-07-13 20:12:18,894 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:18,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:18,895 INFO L82 PathProgramCache]: Analyzing trace with hash -523000667, now seen corresponding path program 151 times [2021-07-13 20:12:18,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:18,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922108983] [2021-07-13 20:12:18,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:18,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:19,186 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:19,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:19,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922108983] [2021-07-13 20:12:19,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922108983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:19,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002740] [2021-07-13 20:12:19,186 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:19,213 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:12:19,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:19,724 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:19,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:19,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:19,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-13 20:12:19,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201740221] [2021-07-13 20:12:19,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:12:19,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:19,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:12:19,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1589, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:12:19,726 INFO L87 Difference]: Start difference. First operand 881 states and 1920 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:22,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:22,660 INFO L93 Difference]: Finished difference Result 1312 states and 2692 transitions. [2021-07-13 20:12:22,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-07-13 20:12:22,661 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:12:22,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:22,662 INFO L225 Difference]: With dead ends: 1312 [2021-07-13 20:12:22,662 INFO L226 Difference]: Without dead ends: 1268 [2021-07-13 20:12:22,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4670 ImplicationChecksByTransitivity, 2762.1ms TimeCoverageRelationStatistics Valid=1619, Invalid=13143, Unknown=0, NotChecked=0, Total=14762 [2021-07-13 20:12:22,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2021-07-13 20:12:22,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 885. [2021-07-13 20:12:22,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 2.180995475113122) internal successors, (1928), 884 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:22,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1928 transitions. [2021-07-13 20:12:22,672 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1928 transitions. Word has length 43 [2021-07-13 20:12:22,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:22,672 INFO L482 AbstractCegarLoop]: Abstraction has 885 states and 1928 transitions. [2021-07-13 20:12:22,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:22,672 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1928 transitions. [2021-07-13 20:12:22,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:12:22,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:22,673 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:22,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-07-13 20:12:22,873 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:22,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:22,874 INFO L82 PathProgramCache]: Analyzing trace with hash 573042153, now seen corresponding path program 152 times [2021-07-13 20:12:22,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:22,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244439365] [2021-07-13 20:12:22,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:22,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:23,161 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:23,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:23,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244439365] [2021-07-13 20:12:23,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244439365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:23,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160008267] [2021-07-13 20:12:23,161 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:23,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:12:23,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:23,187 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:12:23,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:23,693 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:23,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160008267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:23,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:23,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-13 20:12:23,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486869460] [2021-07-13 20:12:23,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:12:23,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:23,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:12:23,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1581, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:12:23,694 INFO L87 Difference]: Start difference. First operand 885 states and 1928 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:26,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:26,798 INFO L93 Difference]: Finished difference Result 1325 states and 2728 transitions. [2021-07-13 20:12:26,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-07-13 20:12:26,799 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:12:26,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:26,800 INFO L225 Difference]: With dead ends: 1325 [2021-07-13 20:12:26,800 INFO L226 Difference]: Without dead ends: 1287 [2021-07-13 20:12:26,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5105 ImplicationChecksByTransitivity, 2866.3ms TimeCoverageRelationStatistics Valid=1818, Invalid=14184, Unknown=0, NotChecked=0, Total=16002 [2021-07-13 20:12:26,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-07-13 20:12:26,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 891. [2021-07-13 20:12:26,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 2.1842696629213485) internal successors, (1944), 890 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:26,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1944 transitions. [2021-07-13 20:12:26,810 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1944 transitions. Word has length 43 [2021-07-13 20:12:26,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:26,811 INFO L482 AbstractCegarLoop]: Abstraction has 891 states and 1944 transitions. [2021-07-13 20:12:26,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:26,811 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1944 transitions. [2021-07-13 20:12:26,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:12:26,811 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:26,812 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:27,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-07-13 20:12:27,025 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:27,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:27,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1405466669, now seen corresponding path program 153 times [2021-07-13 20:12:27,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:27,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136453156] [2021-07-13 20:12:27,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:27,373 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:27,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:27,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136453156] [2021-07-13 20:12:27,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136453156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:27,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702550985] [2021-07-13 20:12:27,374 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:27,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 20:12:27,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:27,405 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:12:27,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:27,914 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:27,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702550985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:27,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:27,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-13 20:12:27,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230733368] [2021-07-13 20:12:27,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:12:27,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:27,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:12:27,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1566, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:12:27,915 INFO L87 Difference]: Start difference. First operand 891 states and 1944 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:31,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:31,308 INFO L93 Difference]: Finished difference Result 1435 states and 2932 transitions. [2021-07-13 20:12:31,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-07-13 20:12:31,308 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:12:31,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:31,310 INFO L225 Difference]: With dead ends: 1435 [2021-07-13 20:12:31,310 INFO L226 Difference]: Without dead ends: 1390 [2021-07-13 20:12:31,311 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5395 ImplicationChecksByTransitivity, 3215.8ms TimeCoverageRelationStatistics Valid=2017, Invalid=15013, Unknown=0, NotChecked=0, Total=17030 [2021-07-13 20:12:31,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-07-13 20:12:31,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 895. [2021-07-13 20:12:31,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 2.1868008948545863) internal successors, (1955), 894 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:31,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1955 transitions. [2021-07-13 20:12:31,321 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1955 transitions. Word has length 43 [2021-07-13 20:12:31,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:31,321 INFO L482 AbstractCegarLoop]: Abstraction has 895 states and 1955 transitions. [2021-07-13 20:12:31,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:31,321 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1955 transitions. [2021-07-13 20:12:31,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:12:31,322 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:31,322 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:31,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-07-13 20:12:31,523 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:31,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:31,523 INFO L82 PathProgramCache]: Analyzing trace with hash 140538809, now seen corresponding path program 154 times [2021-07-13 20:12:31,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:31,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694611526] [2021-07-13 20:12:31,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:31,850 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:31,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:31,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694611526] [2021-07-13 20:12:31,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694611526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:31,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110412430] [2021-07-13 20:12:31,851 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:31,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:12:31,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:31,879 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:12:31,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:32,380 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:32,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110412430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:32,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:32,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-13 20:12:32,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171536380] [2021-07-13 20:12:32,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:12:32,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:32,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:12:32,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1564, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:12:32,381 INFO L87 Difference]: Start difference. First operand 895 states and 1955 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:35,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:35,507 INFO L93 Difference]: Finished difference Result 1303 states and 2684 transitions. [2021-07-13 20:12:35,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-07-13 20:12:35,508 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:12:35,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:35,509 INFO L225 Difference]: With dead ends: 1303 [2021-07-13 20:12:35,509 INFO L226 Difference]: Without dead ends: 1276 [2021-07-13 20:12:35,510 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4606 ImplicationChecksByTransitivity, 3011.9ms TimeCoverageRelationStatistics Valid=1928, Invalid=12834, Unknown=0, NotChecked=0, Total=14762 [2021-07-13 20:12:35,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-07-13 20:12:35,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 643. [2021-07-13 20:12:35,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 2.115264797507788) internal successors, (1358), 642 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:35,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1358 transitions. [2021-07-13 20:12:35,518 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1358 transitions. Word has length 43 [2021-07-13 20:12:35,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:35,518 INFO L482 AbstractCegarLoop]: Abstraction has 643 states and 1358 transitions. [2021-07-13 20:12:35,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:35,518 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1358 transitions. [2021-07-13 20:12:35,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:12:35,519 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:35,519 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:35,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2021-07-13 20:12:35,719 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:35,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:35,719 INFO L82 PathProgramCache]: Analyzing trace with hash -544326747, now seen corresponding path program 155 times [2021-07-13 20:12:35,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:35,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324520598] [2021-07-13 20:12:35,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:35,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:36,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:36,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324520598] [2021-07-13 20:12:36,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324520598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:36,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909061215] [2021-07-13 20:12:36,011 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:36,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:12:36,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:36,038 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:12:36,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:36,537 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:36,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909061215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:36,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:36,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-13 20:12:36,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986974867] [2021-07-13 20:12:36,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:12:36,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:36,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:12:36,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1579, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:12:36,538 INFO L87 Difference]: Start difference. First operand 643 states and 1358 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:39,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:39,586 INFO L93 Difference]: Finished difference Result 1011 states and 2000 transitions. [2021-07-13 20:12:39,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-07-13 20:12:39,587 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:12:39,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:39,588 INFO L225 Difference]: With dead ends: 1011 [2021-07-13 20:12:39,588 INFO L226 Difference]: Without dead ends: 973 [2021-07-13 20:12:39,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5240 ImplicationChecksByTransitivity, 2904.0ms TimeCoverageRelationStatistics Valid=1787, Invalid=14469, Unknown=0, NotChecked=0, Total=16256 [2021-07-13 20:12:39,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-07-13 20:12:39,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 647. [2021-07-13 20:12:39,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 2.1145510835913313) internal successors, (1366), 646 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:39,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1366 transitions. [2021-07-13 20:12:39,595 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1366 transitions. Word has length 43 [2021-07-13 20:12:39,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:39,595 INFO L482 AbstractCegarLoop]: Abstraction has 647 states and 1366 transitions. [2021-07-13 20:12:39,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:39,595 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1366 transitions. [2021-07-13 20:12:39,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:12:39,595 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:39,595 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:39,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:39,796 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:39,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:39,796 INFO L82 PathProgramCache]: Analyzing trace with hash 288097769, now seen corresponding path program 156 times [2021-07-13 20:12:39,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:39,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302341748] [2021-07-13 20:12:39,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:39,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:40,116 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:40,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:40,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302341748] [2021-07-13 20:12:40,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302341748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:40,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208371441] [2021-07-13 20:12:40,117 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:40,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 20:12:40,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:40,146 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:12:40,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:40,646 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:40,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208371441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:40,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:40,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-13 20:12:40,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767236395] [2021-07-13 20:12:40,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:12:40,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:40,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:12:40,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1564, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:12:40,647 INFO L87 Difference]: Start difference. First operand 647 states and 1366 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:44,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:44,086 INFO L93 Difference]: Finished difference Result 1112 states and 2182 transitions. [2021-07-13 20:12:44,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-07-13 20:12:44,086 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:12:44,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:44,088 INFO L225 Difference]: With dead ends: 1112 [2021-07-13 20:12:44,088 INFO L226 Difference]: Without dead ends: 1067 [2021-07-13 20:12:44,089 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5556 ImplicationChecksByTransitivity, 3221.8ms TimeCoverageRelationStatistics Valid=2004, Invalid=15288, Unknown=0, NotChecked=0, Total=17292 [2021-07-13 20:12:44,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-07-13 20:12:44,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 649. [2021-07-13 20:12:44,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 2.115740740740741) internal successors, (1371), 648 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:44,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1371 transitions. [2021-07-13 20:12:44,095 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1371 transitions. Word has length 43 [2021-07-13 20:12:44,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:44,095 INFO L482 AbstractCegarLoop]: Abstraction has 649 states and 1371 transitions. [2021-07-13 20:12:44,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:44,096 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1371 transitions. [2021-07-13 20:12:44,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:12:44,096 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:44,096 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:44,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2021-07-13 20:12:44,297 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:44,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:44,297 INFO L82 PathProgramCache]: Analyzing trace with hash -976830091, now seen corresponding path program 157 times [2021-07-13 20:12:44,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:44,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490560739] [2021-07-13 20:12:44,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:44,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:44,623 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:44,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:44,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490560739] [2021-07-13 20:12:44,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490560739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:44,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314805852] [2021-07-13 20:12:44,623 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:44,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:44,650 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:12:44,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:45,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314805852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:45,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:45,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-13 20:12:45,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966894869] [2021-07-13 20:12:45,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:12:45,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:45,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:12:45,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1562, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:12:45,166 INFO L87 Difference]: Start difference. First operand 649 states and 1371 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:48,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:48,292 INFO L93 Difference]: Finished difference Result 1006 states and 2001 transitions. [2021-07-13 20:12:48,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-07-13 20:12:48,292 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:12:48,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:48,293 INFO L225 Difference]: With dead ends: 1006 [2021-07-13 20:12:48,293 INFO L226 Difference]: Without dead ends: 986 [2021-07-13 20:12:48,294 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4654 ImplicationChecksByTransitivity, 3040.7ms TimeCoverageRelationStatistics Valid=1906, Invalid=12856, Unknown=0, NotChecked=0, Total=14762 [2021-07-13 20:12:48,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-07-13 20:12:48,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 637. [2021-07-13 20:12:48,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 2.1037735849056602) internal successors, (1338), 636 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:48,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1338 transitions. [2021-07-13 20:12:48,301 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1338 transitions. Word has length 43 [2021-07-13 20:12:48,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:48,301 INFO L482 AbstractCegarLoop]: Abstraction has 637 states and 1338 transitions. [2021-07-13 20:12:48,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:48,301 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1338 transitions. [2021-07-13 20:12:48,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:12:48,301 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:48,301 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:48,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-07-13 20:12:48,502 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:48,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:48,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1442671963, now seen corresponding path program 158 times [2021-07-13 20:12:48,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:48,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90619313] [2021-07-13 20:12:48,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:48,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:48,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:48,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90619313] [2021-07-13 20:12:48,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90619313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:48,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79382243] [2021-07-13 20:12:48,760 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:48,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:12:48,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:48,787 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:12:48,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:49,286 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:49,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79382243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:49,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:49,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-13 20:12:49,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168141890] [2021-07-13 20:12:49,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:12:49,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:49,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:12:49,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1555, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:12:49,287 INFO L87 Difference]: Start difference. First operand 637 states and 1338 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:53,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:53,086 INFO L93 Difference]: Finished difference Result 1161 states and 2336 transitions. [2021-07-13 20:12:53,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-07-13 20:12:53,086 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:12:53,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:53,088 INFO L225 Difference]: With dead ends: 1161 [2021-07-13 20:12:53,088 INFO L226 Difference]: Without dead ends: 1117 [2021-07-13 20:12:53,088 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6808 ImplicationChecksByTransitivity, 3672.6ms TimeCoverageRelationStatistics Valid=2323, Invalid=17699, Unknown=0, NotChecked=0, Total=20022 [2021-07-13 20:12:53,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2021-07-13 20:12:53,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 653. [2021-07-13 20:12:53,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 2.105828220858896) internal successors, (1373), 652 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:53,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1373 transitions. [2021-07-13 20:12:53,095 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1373 transitions. Word has length 43 [2021-07-13 20:12:53,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:53,095 INFO L482 AbstractCegarLoop]: Abstraction has 653 states and 1373 transitions. [2021-07-13 20:12:53,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:53,095 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1373 transitions. [2021-07-13 20:12:53,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:12:53,096 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:53,096 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:53,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:53,296 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:53,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:53,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1587367473, now seen corresponding path program 159 times [2021-07-13 20:12:53,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:53,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013962525] [2021-07-13 20:12:53,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:53,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:53,558 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:53,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:53,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013962525] [2021-07-13 20:12:53,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013962525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:53,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642257486] [2021-07-13 20:12:53,558 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:53,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 20:12:53,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:53,588 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 63 conjunts are in the unsatisfiable core [2021-07-13 20:12:53,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:54,128 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:54,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642257486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:54,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:54,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-13 20:12:54,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111599298] [2021-07-13 20:12:54,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:12:54,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:54,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:12:54,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1556, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:12:54,129 INFO L87 Difference]: Start difference. First operand 653 states and 1373 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:57,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:57,053 INFO L93 Difference]: Finished difference Result 1143 states and 2277 transitions. [2021-07-13 20:12:57,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-07-13 20:12:57,054 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 20:12:57,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:57,055 INFO L225 Difference]: With dead ends: 1143 [2021-07-13 20:12:57,055 INFO L226 Difference]: Without dead ends: 1077 [2021-07-13 20:12:57,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4300 ImplicationChecksByTransitivity, 2813.9ms TimeCoverageRelationStatistics Valid=1808, Invalid=11998, Unknown=0, NotChecked=0, Total=13806 [2021-07-13 20:12:57,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2021-07-13 20:12:57,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 444. [2021-07-13 20:12:57,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.0654627539503387) internal successors, (915), 443 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:57,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 915 transitions. [2021-07-13 20:12:57,061 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 915 transitions. Word has length 43 [2021-07-13 20:12:57,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:57,061 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 915 transitions. [2021-07-13 20:12:57,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:57,061 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 915 transitions. [2021-07-13 20:12:57,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 20:12:57,062 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:57,062 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:57,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:57,262 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:57,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:57,263 INFO L82 PathProgramCache]: Analyzing trace with hash -976438983, now seen corresponding path program 160 times [2021-07-13 20:12:57,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:57,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152697332] [2021-07-13 20:12:57,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:57,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:57,589 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:57,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:57,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152697332] [2021-07-13 20:12:57,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152697332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:57,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837706099] [2021-07-13 20:12:57,590 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:57,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:12:57,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:57,617 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-13 20:12:57,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:58,212 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:58,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837706099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:58,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:58,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 36 [2021-07-13 20:12:58,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715016640] [2021-07-13 20:12:58,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:12:58,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:58,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:12:58,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:12:58,213 INFO L87 Difference]: Start difference. First operand 444 states and 915 transitions. Second operand has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 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 20:13:04,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:04,212 INFO L93 Difference]: Finished difference Result 790 states and 1593 transitions. [2021-07-13 20:13:04,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-07-13 20:13:04,212 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 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 43 [2021-07-13 20:13:04,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:04,213 INFO L225 Difference]: With dead ends: 790 [2021-07-13 20:13:04,213 INFO L226 Difference]: Without dead ends: 764 [2021-07-13 20:13:04,214 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6302 ImplicationChecksByTransitivity, 5429.3ms TimeCoverageRelationStatistics Valid=1380, Invalid=16442, Unknown=0, NotChecked=0, Total=17822 [2021-07-13 20:13:04,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2021-07-13 20:13:04,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 387. [2021-07-13 20:13:04,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 2.0725388601036268) internal successors, (800), 386 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:04,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 800 transitions. [2021-07-13 20:13:04,218 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 800 transitions. Word has length 43 [2021-07-13 20:13:04,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:04,218 INFO L482 AbstractCegarLoop]: Abstraction has 387 states and 800 transitions. [2021-07-13 20:13:04,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 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 20:13:04,218 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 800 transitions. [2021-07-13 20:13:04,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-13 20:13:04,219 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:04,219 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:04,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-07-13 20:13:04,419 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:04,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:04,420 INFO L82 PathProgramCache]: Analyzing trace with hash 126220515, now seen corresponding path program 161 times [2021-07-13 20:13:04,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:04,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599204952] [2021-07-13 20:13:04,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:04,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:04,493 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:13:04,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:04,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599204952] [2021-07-13 20:13:04,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599204952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:04,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636676419] [2021-07-13 20:13:04,493 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:04,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 20:13:04,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:04,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:13:04,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:13:04,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636676419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:04,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:04,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-13 20:13:04,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866764638] [2021-07-13 20:13:04,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:13:04,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:04,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:13:04,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:13:04,597 INFO L87 Difference]: Start difference. First operand 387 states and 800 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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 20:13:04,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:04,757 INFO L93 Difference]: Finished difference Result 657 states and 1304 transitions. [2021-07-13 20:13:04,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:13:04,757 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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 45 [2021-07-13 20:13:04,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:04,758 INFO L225 Difference]: With dead ends: 657 [2021-07-13 20:13:04,758 INFO L226 Difference]: Without dead ends: 591 [2021-07-13 20:13:04,758 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 112.1ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:13:04,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-07-13 20:13:04,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 418. [2021-07-13 20:13:04,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.0839328537170263) internal successors, (869), 417 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:04,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 869 transitions. [2021-07-13 20:13:04,762 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 869 transitions. Word has length 45 [2021-07-13 20:13:04,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:04,762 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 869 transitions. [2021-07-13 20:13:04,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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 20:13:04,763 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 869 transitions. [2021-07-13 20:13:04,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-13 20:13:04,763 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:04,763 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:04,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-07-13 20:13:04,971 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:04,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:04,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1358919197, now seen corresponding path program 162 times [2021-07-13 20:13:04,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:04,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144626171] [2021-07-13 20:13:04,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:04,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:05,456 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:05,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:05,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144626171] [2021-07-13 20:13:05,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144626171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:05,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115772123] [2021-07-13 20:13:05,457 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:05,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 20:13:05,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:05,489 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:13:05,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:06,189 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:06,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115772123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:06,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:06,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-07-13 20:13:06,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947173524] [2021-07-13 20:13:06,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:13:06,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:06,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:13:06,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:13:06,190 INFO L87 Difference]: Start difference. First operand 418 states and 869 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:07,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:07,612 INFO L93 Difference]: Finished difference Result 559 states and 1149 transitions. [2021-07-13 20:13:07,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:13:07,613 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-07-13 20:13:07,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:07,613 INFO L225 Difference]: With dead ends: 559 [2021-07-13 20:13:07,613 INFO L226 Difference]: Without dead ends: 543 [2021-07-13 20:13:07,614 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1493.6ms TimeCoverageRelationStatistics Valid=223, Invalid=3317, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:13:07,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-07-13 20:13:07,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 435. [2021-07-13 20:13:07,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.0806451612903225) internal successors, (903), 434 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:07,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 903 transitions. [2021-07-13 20:13:07,618 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 903 transitions. Word has length 45 [2021-07-13 20:13:07,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:07,618 INFO L482 AbstractCegarLoop]: Abstraction has 435 states and 903 transitions. [2021-07-13 20:13:07,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:07,618 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 903 transitions. [2021-07-13 20:13:07,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-13 20:13:07,618 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:07,619 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:07,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2021-07-13 20:13:07,819 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:07,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:07,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1371110303, now seen corresponding path program 163 times [2021-07-13 20:13:07,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:07,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470677419] [2021-07-13 20:13:07,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:08,128 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:13:08,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:08,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470677419] [2021-07-13 20:13:08,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470677419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:08,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319642706] [2021-07-13 20:13:08,128 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:08,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:08,155 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:13:08,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:08,792 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:08,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319642706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:08,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:08,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 42 [2021-07-13 20:13:08,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099127504] [2021-07-13 20:13:08,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:13:08,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:08,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:13:08,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1659, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:13:08,793 INFO L87 Difference]: Start difference. First operand 435 states and 903 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:11,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:11,367 INFO L93 Difference]: Finished difference Result 726 states and 1438 transitions. [2021-07-13 20:13:11,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-07-13 20:13:11,367 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-07-13 20:13:11,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:11,368 INFO L225 Difference]: With dead ends: 726 [2021-07-13 20:13:11,368 INFO L226 Difference]: Without dead ends: 655 [2021-07-13 20:13:11,369 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3246 ImplicationChecksByTransitivity, 2286.3ms TimeCoverageRelationStatistics Valid=626, Invalid=9676, Unknown=0, NotChecked=0, Total=10302 [2021-07-13 20:13:11,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-07-13 20:13:11,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 347. [2021-07-13 20:13:11,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.0751445086705202) internal successors, (718), 346 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:11,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 718 transitions. [2021-07-13 20:13:11,372 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 718 transitions. Word has length 45 [2021-07-13 20:13:11,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:11,372 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 718 transitions. [2021-07-13 20:13:11,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:11,373 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 718 transitions. [2021-07-13 20:13:11,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-13 20:13:11,373 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:11,373 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:11,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable362 [2021-07-13 20:13:11,589 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:11,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:11,589 INFO L82 PathProgramCache]: Analyzing trace with hash 705869159, now seen corresponding path program 164 times [2021-07-13 20:13:11,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:11,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899437807] [2021-07-13 20:13:11,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:11,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:12,064 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:12,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:12,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899437807] [2021-07-13 20:13:12,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899437807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:12,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309486661] [2021-07-13 20:13:12,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:12,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:13:12,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:12,092 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:13:12,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:12,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309486661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:12,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:12,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 43 [2021-07-13 20:13:12,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244949967] [2021-07-13 20:13:12,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-07-13 20:13:12,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:12,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-07-13 20:13:12,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1752, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:13:12,826 INFO L87 Difference]: Start difference. First operand 347 states and 718 transitions. Second operand has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:14,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:14,111 INFO L93 Difference]: Finished difference Result 477 states and 976 transitions. [2021-07-13 20:13:14,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:13:14,111 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-07-13 20:13:14,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:14,112 INFO L225 Difference]: With dead ends: 477 [2021-07-13 20:13:14,112 INFO L226 Difference]: Without dead ends: 461 [2021-07-13 20:13:14,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 1433.1ms TimeCoverageRelationStatistics Valid=223, Invalid=3199, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:13:14,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-07-13 20:13:14,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 347. [2021-07-13 20:13:14,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.0751445086705202) internal successors, (718), 346 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:14,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 718 transitions. [2021-07-13 20:13:14,115 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 718 transitions. Word has length 45 [2021-07-13 20:13:14,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:14,115 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 718 transitions. [2021-07-13 20:13:14,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:14,115 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 718 transitions. [2021-07-13 20:13:14,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-13 20:13:14,116 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:14,116 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:14,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-07-13 20:13:14,316 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:14,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:14,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1550510357, now seen corresponding path program 165 times [2021-07-13 20:13:14,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:14,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301037992] [2021-07-13 20:13:14,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:14,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:14,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:14,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301037992] [2021-07-13 20:13:14,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301037992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:14,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803942328] [2021-07-13 20:13:14,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:14,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 20:13:14,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:14,820 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:13:14,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:15,527 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:15,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803942328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:15,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:15,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-07-13 20:13:15,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208485740] [2021-07-13 20:13:15,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:13:15,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:15,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:13:15,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:13:15,528 INFO L87 Difference]: Start difference. First operand 347 states and 718 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:16,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:16,944 INFO L93 Difference]: Finished difference Result 491 states and 1004 transitions. [2021-07-13 20:13:16,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:13:16,944 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-07-13 20:13:16,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:16,945 INFO L225 Difference]: With dead ends: 491 [2021-07-13 20:13:16,945 INFO L226 Difference]: Without dead ends: 475 [2021-07-13 20:13:16,945 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1487.2ms TimeCoverageRelationStatistics Valid=223, Invalid=3317, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:13:16,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-07-13 20:13:16,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 355. [2021-07-13 20:13:16,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.073446327683616) internal successors, (734), 354 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:16,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 734 transitions. [2021-07-13 20:13:16,949 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 734 transitions. Word has length 45 [2021-07-13 20:13:16,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:16,949 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 734 transitions. [2021-07-13 20:13:16,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:16,949 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 734 transitions. [2021-07-13 20:13:16,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-13 20:13:16,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:16,949 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:17,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:17,150 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:17,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:17,150 INFO L82 PathProgramCache]: Analyzing trace with hash -972740753, now seen corresponding path program 166 times [2021-07-13 20:13:17,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:17,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469199088] [2021-07-13 20:13:17,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:17,463 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:13:17,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:17,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469199088] [2021-07-13 20:13:17,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469199088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:17,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790712751] [2021-07-13 20:13:17,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:17,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:13:17,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:17,490 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-13 20:13:17,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:18,100 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:18,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790712751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:18,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:18,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 42 [2021-07-13 20:13:18,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396307632] [2021-07-13 20:13:18,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:13:18,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:18,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:13:18,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1658, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:13:18,101 INFO L87 Difference]: Start difference. First operand 355 states and 734 transitions. Second operand has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:20,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:20,656 INFO L93 Difference]: Finished difference Result 605 states and 1216 transitions. [2021-07-13 20:13:20,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-07-13 20:13:20,656 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-07-13 20:13:20,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:20,657 INFO L225 Difference]: With dead ends: 605 [2021-07-13 20:13:20,657 INFO L226 Difference]: Without dead ends: 573 [2021-07-13 20:13:20,657 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3233 ImplicationChecksByTransitivity, 2292.5ms TimeCoverageRelationStatistics Valid=647, Invalid=9655, Unknown=0, NotChecked=0, Total=10302 [2021-07-13 20:13:20,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-07-13 20:13:20,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 384. [2021-07-13 20:13:20,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.0704960835509136) internal successors, (793), 383 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:20,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 793 transitions. [2021-07-13 20:13:20,661 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 793 transitions. Word has length 45 [2021-07-13 20:13:20,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:20,661 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 793 transitions. [2021-07-13 20:13:20,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:20,661 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 793 transitions. [2021-07-13 20:13:20,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:13:20,662 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:20,662 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:20,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-07-13 20:13:20,862 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:20,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:20,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1749615503, now seen corresponding path program 167 times [2021-07-13 20:13:20,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:20,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314330784] [2021-07-13 20:13:20,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:21,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:21,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314330784] [2021-07-13 20:13:21,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314330784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:21,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123960798] [2021-07-13 20:13:21,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:21,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 20:13:21,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:21,228 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:13:21,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:21,824 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:21,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123960798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:21,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:21,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:13:21,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628714578] [2021-07-13 20:13:21,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:13:21,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:21,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:13:21,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1916, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:13:21,825 INFO L87 Difference]: Start difference. First operand 384 states and 793 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:24,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:24,512 INFO L93 Difference]: Finished difference Result 934 states and 1837 transitions. [2021-07-13 20:13:24,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-07-13 20:13:24,512 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:13:24,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:24,514 INFO L225 Difference]: With dead ends: 934 [2021-07-13 20:13:24,514 INFO L226 Difference]: Without dead ends: 855 [2021-07-13 20:13:24,514 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3856 ImplicationChecksByTransitivity, 2749.1ms TimeCoverageRelationStatistics Valid=1642, Invalid=11468, Unknown=0, NotChecked=0, Total=13110 [2021-07-13 20:13:24,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-07-13 20:13:24,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 477. [2021-07-13 20:13:24,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 2.1512605042016806) internal successors, (1024), 476 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:24,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1024 transitions. [2021-07-13 20:13:24,520 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1024 transitions. Word has length 47 [2021-07-13 20:13:24,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:24,520 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1024 transitions. [2021-07-13 20:13:24,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:24,520 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1024 transitions. [2021-07-13 20:13:24,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:13:24,521 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:24,521 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:24,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:24,736 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:24,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:24,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1264016873, now seen corresponding path program 168 times [2021-07-13 20:13:24,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:24,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32555602] [2021-07-13 20:13:24,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:25,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:25,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32555602] [2021-07-13 20:13:25,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32555602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:25,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259812355] [2021-07-13 20:13:25,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:25,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 20:13:25,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:25,095 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 68 conjunts are in the unsatisfiable core [2021-07-13 20:13:25,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:25,789 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:25,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259812355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:25,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:25,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:13:25,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588877626] [2021-07-13 20:13:25,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:13:25,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:25,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:13:25,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1943, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:13:25,790 INFO L87 Difference]: Start difference. First operand 477 states and 1024 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:29,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:29,001 INFO L93 Difference]: Finished difference Result 978 states and 1910 transitions. [2021-07-13 20:13:29,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-07-13 20:13:29,001 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:13:29,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:29,003 INFO L225 Difference]: With dead ends: 978 [2021-07-13 20:13:29,003 INFO L226 Difference]: Without dead ends: 910 [2021-07-13 20:13:29,004 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4027 ImplicationChecksByTransitivity, 3191.6ms TimeCoverageRelationStatistics Valid=1709, Invalid=12571, Unknown=0, NotChecked=0, Total=14280 [2021-07-13 20:13:29,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2021-07-13 20:13:29,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 479. [2021-07-13 20:13:29,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 2.1506276150627617) internal successors, (1028), 478 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:29,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1028 transitions. [2021-07-13 20:13:29,009 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1028 transitions. Word has length 47 [2021-07-13 20:13:29,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:29,009 INFO L482 AbstractCegarLoop]: Abstraction has 479 states and 1028 transitions. [2021-07-13 20:13:29,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:29,010 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1028 transitions. [2021-07-13 20:13:29,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:13:29,010 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:29,010 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:29,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:29,210 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:29,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:29,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1204905819, now seen corresponding path program 169 times [2021-07-13 20:13:29,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:29,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309424070] [2021-07-13 20:13:29,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:29,546 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:29,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:29,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309424070] [2021-07-13 20:13:29,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309424070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:29,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142647450] [2021-07-13 20:13:29,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:29,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:29,573 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:13:29,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:30,142 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:30,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142647450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:30,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:30,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:13:30,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420627105] [2021-07-13 20:13:30,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:13:30,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:30,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:13:30,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1932, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:13:30,144 INFO L87 Difference]: Start difference. First operand 479 states and 1028 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:33,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:33,184 INFO L93 Difference]: Finished difference Result 976 states and 1908 transitions. [2021-07-13 20:13:33,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-07-13 20:13:33,185 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:13:33,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:33,186 INFO L225 Difference]: With dead ends: 976 [2021-07-13 20:13:33,186 INFO L226 Difference]: Without dead ends: 914 [2021-07-13 20:13:33,186 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4704 ImplicationChecksByTransitivity, 2961.4ms TimeCoverageRelationStatistics Valid=1823, Invalid=13677, Unknown=0, NotChecked=0, Total=15500 [2021-07-13 20:13:33,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2021-07-13 20:13:33,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 481. [2021-07-13 20:13:33,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 2.15) internal successors, (1032), 480 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:33,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1032 transitions. [2021-07-13 20:13:33,192 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1032 transitions. Word has length 47 [2021-07-13 20:13:33,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:33,192 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1032 transitions. [2021-07-13 20:13:33,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:33,192 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1032 transitions. [2021-07-13 20:13:33,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:13:33,193 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:33,193 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:33,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:33,410 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:33,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:33,410 INFO L82 PathProgramCache]: Analyzing trace with hash -298668641, now seen corresponding path program 170 times [2021-07-13 20:13:33,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:33,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442617329] [2021-07-13 20:13:33,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:33,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:33,710 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:33,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:33,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442617329] [2021-07-13 20:13:33,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442617329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:33,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423575046] [2021-07-13 20:13:33,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:33,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:13:33,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:33,740 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:13:33,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:34,305 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:34,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423575046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:34,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:34,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:13:34,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963270745] [2021-07-13 20:13:34,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:13:34,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:34,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:13:34,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1936, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:13:34,307 INFO L87 Difference]: Start difference. First operand 481 states and 1032 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:37,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:37,381 INFO L93 Difference]: Finished difference Result 974 states and 1906 transitions. [2021-07-13 20:13:37,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-07-13 20:13:37,381 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:13:37,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:37,382 INFO L225 Difference]: With dead ends: 974 [2021-07-13 20:13:37,382 INFO L226 Difference]: Without dead ends: 918 [2021-07-13 20:13:37,383 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 2971.8ms TimeCoverageRelationStatistics Valid=1940, Invalid=14830, Unknown=0, NotChecked=0, Total=16770 [2021-07-13 20:13:37,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-07-13 20:13:37,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 483. [2021-07-13 20:13:37,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 2.1493775933609958) internal successors, (1036), 482 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:37,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1036 transitions. [2021-07-13 20:13:37,389 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1036 transitions. Word has length 47 [2021-07-13 20:13:37,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:37,389 INFO L482 AbstractCegarLoop]: Abstraction has 483 states and 1036 transitions. [2021-07-13 20:13:37,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:37,389 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1036 transitions. [2021-07-13 20:13:37,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:13:37,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:37,390 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:37,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-07-13 20:13:37,590 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:37,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:37,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1845015779, now seen corresponding path program 171 times [2021-07-13 20:13:37,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:37,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330916819] [2021-07-13 20:13:37,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:37,917 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:37,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:37,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330916819] [2021-07-13 20:13:37,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330916819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:37,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241099825] [2021-07-13 20:13:37,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:37,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 20:13:37,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:37,950 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:13:37,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:38,534 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:38,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241099825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:38,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:38,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:13:38,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883974054] [2021-07-13 20:13:38,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:13:38,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:38,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:13:38,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1932, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:13:38,535 INFO L87 Difference]: Start difference. First operand 483 states and 1036 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:41,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:41,878 INFO L93 Difference]: Finished difference Result 972 states and 1904 transitions. [2021-07-13 20:13:41,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-07-13 20:13:41,879 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:13:41,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:41,880 INFO L225 Difference]: With dead ends: 972 [2021-07-13 20:13:41,880 INFO L226 Difference]: Without dead ends: 922 [2021-07-13 20:13:41,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5601 ImplicationChecksByTransitivity, 3215.9ms TimeCoverageRelationStatistics Valid=2092, Invalid=15998, Unknown=0, NotChecked=0, Total=18090 [2021-07-13 20:13:41,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2021-07-13 20:13:41,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 485. [2021-07-13 20:13:41,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 2.1487603305785123) internal successors, (1040), 484 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:41,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1040 transitions. [2021-07-13 20:13:41,886 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1040 transitions. Word has length 47 [2021-07-13 20:13:41,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:41,886 INFO L482 AbstractCegarLoop]: Abstraction has 485 states and 1040 transitions. [2021-07-13 20:13:41,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:41,887 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1040 transitions. [2021-07-13 20:13:41,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:13:41,887 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:41,887 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:42,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable398,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:42,088 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:42,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:42,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1419789017, now seen corresponding path program 172 times [2021-07-13 20:13:42,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:42,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397996813] [2021-07-13 20:13:42,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:42,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:42,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:42,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397996813] [2021-07-13 20:13:42,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397996813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:42,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566450464] [2021-07-13 20:13:42,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:42,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:13:42,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:42,454 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:13:42,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:43,031 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:43,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566450464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:43,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:43,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:13:43,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234740328] [2021-07-13 20:13:43,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:13:43,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:43,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:13:43,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1926, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:13:43,032 INFO L87 Difference]: Start difference. First operand 485 states and 1040 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:46,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:46,608 INFO L93 Difference]: Finished difference Result 970 states and 1902 transitions. [2021-07-13 20:13:46,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-07-13 20:13:46,608 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:13:46,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:46,609 INFO L225 Difference]: With dead ends: 970 [2021-07-13 20:13:46,609 INFO L226 Difference]: Without dead ends: 926 [2021-07-13 20:13:46,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6075 ImplicationChecksByTransitivity, 3336.1ms TimeCoverageRelationStatistics Valid=2264, Invalid=17196, Unknown=0, NotChecked=0, Total=19460 [2021-07-13 20:13:46,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-07-13 20:13:46,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 487. [2021-07-13 20:13:46,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.1481481481481484) internal successors, (1044), 486 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:46,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1044 transitions. [2021-07-13 20:13:46,615 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1044 transitions. Word has length 47 [2021-07-13 20:13:46,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:46,616 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1044 transitions. [2021-07-13 20:13:46,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:46,616 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1044 transitions. [2021-07-13 20:13:46,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:13:46,616 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:46,616 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:46,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-07-13 20:13:46,817 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:46,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:46,817 INFO L82 PathProgramCache]: Analyzing trace with hash -323746197, now seen corresponding path program 173 times [2021-07-13 20:13:46,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:46,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271876504] [2021-07-13 20:13:46,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:46,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:47,142 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:47,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:47,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271876504] [2021-07-13 20:13:47,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271876504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:47,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640150459] [2021-07-13 20:13:47,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:47,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 20:13:47,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:47,173 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:13:47,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:47,739 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:47,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640150459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:47,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:47,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:13:47,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897659772] [2021-07-13 20:13:47,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:13:47,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:47,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:13:47,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1916, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:13:47,740 INFO L87 Difference]: Start difference. First operand 487 states and 1044 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:51,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:51,507 INFO L93 Difference]: Finished difference Result 968 states and 1900 transitions. [2021-07-13 20:13:51,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-07-13 20:13:51,508 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:13:51,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:51,509 INFO L225 Difference]: With dead ends: 968 [2021-07-13 20:13:51,509 INFO L226 Difference]: Without dead ends: 930 [2021-07-13 20:13:51,510 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6565 ImplicationChecksByTransitivity, 3471.1ms TimeCoverageRelationStatistics Valid=2461, Invalid=18419, Unknown=0, NotChecked=0, Total=20880 [2021-07-13 20:13:51,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-07-13 20:13:51,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 489. [2021-07-13 20:13:51,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.1475409836065573) internal successors, (1048), 488 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:51,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1048 transitions. [2021-07-13 20:13:51,516 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1048 transitions. Word has length 47 [2021-07-13 20:13:51,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:51,516 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1048 transitions. [2021-07-13 20:13:51,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:51,516 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1048 transitions. [2021-07-13 20:13:51,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:13:51,516 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:51,516 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:51,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-07-13 20:13:51,717 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:51,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:51,717 INFO L82 PathProgramCache]: Analyzing trace with hash 508678319, now seen corresponding path program 174 times [2021-07-13 20:13:51,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:51,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512647112] [2021-07-13 20:13:51,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:51,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:52,084 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:52,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:52,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512647112] [2021-07-13 20:13:52,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512647112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:52,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346006909] [2021-07-13 20:13:52,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:52,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 20:13:52,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:52,115 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:13:52,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:52,678 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:52,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346006909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:52,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:52,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:13:52,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818653016] [2021-07-13 20:13:52,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:13:52,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:52,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:13:52,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1899, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:13:52,680 INFO L87 Difference]: Start difference. First operand 489 states and 1048 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:56,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:56,718 INFO L93 Difference]: Finished difference Result 1037 states and 2023 transitions. [2021-07-13 20:13:56,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-07-13 20:13:56,718 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:13:56,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:56,719 INFO L225 Difference]: With dead ends: 1037 [2021-07-13 20:13:56,719 INFO L226 Difference]: Without dead ends: 992 [2021-07-13 20:13:56,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6908 ImplicationChecksByTransitivity, 3858.9ms TimeCoverageRelationStatistics Valid=2661, Invalid=19391, Unknown=0, NotChecked=0, Total=22052 [2021-07-13 20:13:56,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2021-07-13 20:13:56,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 492. [2021-07-13 20:13:56,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 2.15071283095723) internal successors, (1056), 491 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:56,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1056 transitions. [2021-07-13 20:13:56,726 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1056 transitions. Word has length 47 [2021-07-13 20:13:56,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:56,726 INFO L482 AbstractCegarLoop]: Abstraction has 492 states and 1056 transitions. [2021-07-13 20:13:56,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:56,727 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1056 transitions. [2021-07-13 20:13:56,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:13:56,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:56,727 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:56,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-07-13 20:13:56,928 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:56,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:56,928 INFO L82 PathProgramCache]: Analyzing trace with hash -756249541, now seen corresponding path program 175 times [2021-07-13 20:13:56,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:56,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639173598] [2021-07-13 20:13:56,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:56,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:57,303 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:57,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:57,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639173598] [2021-07-13 20:13:57,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639173598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:57,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64819572] [2021-07-13 20:13:57,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:57,331 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:13:57,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:57,897 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:57,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64819572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:57,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:57,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:13:57,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028496187] [2021-07-13 20:13:57,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:13:57,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:57,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:13:57,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1897, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:13:57,898 INFO L87 Difference]: Start difference. First operand 492 states and 1056 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:01,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:01,639 INFO L93 Difference]: Finished difference Result 887 states and 1742 transitions. [2021-07-13 20:14:01,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-07-13 20:14:01,640 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:14:01,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:01,641 INFO L225 Difference]: With dead ends: 887 [2021-07-13 20:14:01,641 INFO L226 Difference]: Without dead ends: 867 [2021-07-13 20:14:01,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5722 ImplicationChecksByTransitivity, 3504.9ms TimeCoverageRelationStatistics Valid=2444, Invalid=16188, Unknown=0, NotChecked=0, Total=18632 [2021-07-13 20:14:01,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2021-07-13 20:14:01,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 493. [2021-07-13 20:14:01,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 2.1504065040650406) internal successors, (1058), 492 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:01,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1058 transitions. [2021-07-13 20:14:01,647 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1058 transitions. Word has length 47 [2021-07-13 20:14:01,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:01,647 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1058 transitions. [2021-07-13 20:14:01,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:01,647 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1058 transitions. [2021-07-13 20:14:01,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:14:01,648 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:01,648 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:01,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-07-13 20:14:01,848 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:01,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:01,848 INFO L82 PathProgramCache]: Analyzing trace with hash -110443807, now seen corresponding path program 176 times [2021-07-13 20:14:01,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:01,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526668905] [2021-07-13 20:14:01,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:01,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:02,140 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:02,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:02,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526668905] [2021-07-13 20:14:02,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526668905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:02,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073990132] [2021-07-13 20:14:02,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:02,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:14:02,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:02,169 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:14:02,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:02,743 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:02,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073990132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:02,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:02,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:14:02,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076790993] [2021-07-13 20:14:02,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:14:02,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:02,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:14:02,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1921, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:14:02,744 INFO L87 Difference]: Start difference. First operand 493 states and 1058 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:05,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:05,683 INFO L93 Difference]: Finished difference Result 958 states and 1874 transitions. [2021-07-13 20:14:05,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-07-13 20:14:05,683 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:14:05,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:05,685 INFO L225 Difference]: With dead ends: 958 [2021-07-13 20:14:05,685 INFO L226 Difference]: Without dead ends: 896 [2021-07-13 20:14:05,686 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4343 ImplicationChecksByTransitivity, 2684.5ms TimeCoverageRelationStatistics Valid=1615, Invalid=12665, Unknown=0, NotChecked=0, Total=14280 [2021-07-13 20:14:05,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-07-13 20:14:05,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 499. [2021-07-13 20:14:05,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 2.1485943775100402) internal successors, (1070), 498 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:05,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1070 transitions. [2021-07-13 20:14:05,691 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1070 transitions. Word has length 47 [2021-07-13 20:14:05,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:05,691 INFO L482 AbstractCegarLoop]: Abstraction has 499 states and 1070 transitions. [2021-07-13 20:14:05,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:05,691 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1070 transitions. [2021-07-13 20:14:05,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:14:05,692 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:05,692 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:05,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-07-13 20:14:05,892 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:05,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:05,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1614018267, now seen corresponding path program 177 times [2021-07-13 20:14:05,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:05,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339043139] [2021-07-13 20:14:05,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:05,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:06,189 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:06,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:06,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339043139] [2021-07-13 20:14:06,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339043139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:06,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643787314] [2021-07-13 20:14:06,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:06,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 20:14:06,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:06,222 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:14:06,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:06,790 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:06,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643787314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:06,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:06,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:14:06,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084825738] [2021-07-13 20:14:06,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:14:06,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:06,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:14:06,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1923, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:14:06,791 INFO L87 Difference]: Start difference. First operand 499 states and 1070 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:09,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:09,712 INFO L93 Difference]: Finished difference Result 963 states and 1895 transitions. [2021-07-13 20:14:09,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-07-13 20:14:09,713 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:14:09,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:09,714 INFO L225 Difference]: With dead ends: 963 [2021-07-13 20:14:09,714 INFO L226 Difference]: Without dead ends: 907 [2021-07-13 20:14:09,715 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4760 ImplicationChecksByTransitivity, 2800.9ms TimeCoverageRelationStatistics Valid=1746, Invalid=13754, Unknown=0, NotChecked=0, Total=15500 [2021-07-13 20:14:09,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2021-07-13 20:14:09,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 505. [2021-07-13 20:14:09,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.1547619047619047) internal successors, (1086), 504 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:09,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1086 transitions. [2021-07-13 20:14:09,721 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1086 transitions. Word has length 47 [2021-07-13 20:14:09,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:09,721 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1086 transitions. [2021-07-13 20:14:09,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:09,722 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1086 transitions. [2021-07-13 20:14:09,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:14:09,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:09,722 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:09,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-07-13 20:14:09,923 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:09,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:09,923 INFO L82 PathProgramCache]: Analyzing trace with hash 529666153, now seen corresponding path program 178 times [2021-07-13 20:14:09,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:09,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002290075] [2021-07-13 20:14:09,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:10,256 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:10,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:10,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002290075] [2021-07-13 20:14:10,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002290075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:10,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735678207] [2021-07-13 20:14:10,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:10,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:14:10,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:10,286 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:14:10,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:10,864 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:10,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735678207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:10,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:10,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:14:10,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995909725] [2021-07-13 20:14:10,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:14:10,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:10,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:14:10,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1919, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:14:10,865 INFO L87 Difference]: Start difference. First operand 505 states and 1086 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:14,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:14,097 INFO L93 Difference]: Finished difference Result 971 states and 1921 transitions. [2021-07-13 20:14:14,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-07-13 20:14:14,097 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:14:14,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:14,098 INFO L225 Difference]: With dead ends: 971 [2021-07-13 20:14:14,098 INFO L226 Difference]: Without dead ends: 921 [2021-07-13 20:14:14,099 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5184 ImplicationChecksByTransitivity, 3032.8ms TimeCoverageRelationStatistics Valid=1898, Invalid=14872, Unknown=0, NotChecked=0, Total=16770 [2021-07-13 20:14:14,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-07-13 20:14:14,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 511. [2021-07-13 20:14:14,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.16078431372549) internal successors, (1102), 510 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:14,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1102 transitions. [2021-07-13 20:14:14,104 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1102 transitions. Word has length 47 [2021-07-13 20:14:14,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:14,105 INFO L482 AbstractCegarLoop]: Abstraction has 511 states and 1102 transitions. [2021-07-13 20:14:14,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:14,105 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1102 transitions. [2021-07-13 20:14:14,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:14:14,105 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:14,105 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:14,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:14,309 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:14,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:14,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1559828653, now seen corresponding path program 179 times [2021-07-13 20:14:14,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:14,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882383899] [2021-07-13 20:14:14,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:14,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:14,631 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:14,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:14,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882383899] [2021-07-13 20:14:14,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882383899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:14,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225413046] [2021-07-13 20:14:14,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:14,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 20:14:14,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:14,662 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:14:14,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:15,231 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:15,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225413046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:15,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:15,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:14:15,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005255515] [2021-07-13 20:14:15,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:14:15,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:15,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:14:15,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1913, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:14:15,233 INFO L87 Difference]: Start difference. First operand 511 states and 1102 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:18,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:18,639 INFO L93 Difference]: Finished difference Result 979 states and 1947 transitions. [2021-07-13 20:14:18,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-07-13 20:14:18,640 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:14:18,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:18,641 INFO L225 Difference]: With dead ends: 979 [2021-07-13 20:14:18,641 INFO L226 Difference]: Without dead ends: 935 [2021-07-13 20:14:18,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5631 ImplicationChecksByTransitivity, 3131.1ms TimeCoverageRelationStatistics Valid=2070, Invalid=16020, Unknown=0, NotChecked=0, Total=18090 [2021-07-13 20:14:18,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-07-13 20:14:18,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 517. [2021-07-13 20:14:18,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 2.1666666666666665) internal successors, (1118), 516 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:18,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1118 transitions. [2021-07-13 20:14:18,647 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1118 transitions. Word has length 47 [2021-07-13 20:14:18,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:18,647 INFO L482 AbstractCegarLoop]: Abstraction has 517 states and 1118 transitions. [2021-07-13 20:14:18,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:18,648 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1118 transitions. [2021-07-13 20:14:18,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:14:18,648 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:18,648 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:18,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:18,849 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:18,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:18,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1639095823, now seen corresponding path program 180 times [2021-07-13 20:14:18,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:18,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866754603] [2021-07-13 20:14:18,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:18,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:19,174 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:19,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:19,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866754603] [2021-07-13 20:14:19,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866754603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:19,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430166091] [2021-07-13 20:14:19,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:19,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 20:14:19,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:19,206 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:14:19,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:19,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430166091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:19,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:19,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:14:19,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828677854] [2021-07-13 20:14:19,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:14:19,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:19,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:14:19,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1903, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:14:19,801 INFO L87 Difference]: Start difference. First operand 517 states and 1118 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:23,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:23,338 INFO L93 Difference]: Finished difference Result 987 states and 1973 transitions. [2021-07-13 20:14:23,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-07-13 20:14:23,339 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:14:23,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:23,340 INFO L225 Difference]: With dead ends: 987 [2021-07-13 20:14:23,340 INFO L226 Difference]: Without dead ends: 949 [2021-07-13 20:14:23,341 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6092 ImplicationChecksByTransitivity, 3316.3ms TimeCoverageRelationStatistics Valid=2267, Invalid=17193, Unknown=0, NotChecked=0, Total=19460 [2021-07-13 20:14:23,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-07-13 20:14:23,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 523. [2021-07-13 20:14:23,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 2.1724137931034484) internal successors, (1134), 522 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:23,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1134 transitions. [2021-07-13 20:14:23,347 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1134 transitions. Word has length 47 [2021-07-13 20:14:23,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:23,347 INFO L482 AbstractCegarLoop]: Abstraction has 523 states and 1134 transitions. [2021-07-13 20:14:23,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:23,347 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1134 transitions. [2021-07-13 20:14:23,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:14:23,347 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:23,347 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:23,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:23,548 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:23,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:23,548 INFO L82 PathProgramCache]: Analyzing trace with hash -806671307, now seen corresponding path program 181 times [2021-07-13 20:14:23,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:23,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043377061] [2021-07-13 20:14:23,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:23,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:23,909 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:23,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:23,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043377061] [2021-07-13 20:14:23,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043377061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:23,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819804337] [2021-07-13 20:14:23,910 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:23,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:23,937 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:14:23,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:24,511 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:24,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819804337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:24,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:24,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:14:24,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938094444] [2021-07-13 20:14:24,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:14:24,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:24,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:14:24,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1886, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:14:24,512 INFO L87 Difference]: Start difference. First operand 523 states and 1134 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:28,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:28,553 INFO L93 Difference]: Finished difference Result 1095 states and 2169 transitions. [2021-07-13 20:14:28,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-07-13 20:14:28,554 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:14:28,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:28,555 INFO L225 Difference]: With dead ends: 1095 [2021-07-13 20:14:28,555 INFO L226 Difference]: Without dead ends: 1050 [2021-07-13 20:14:28,556 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6417 ImplicationChecksByTransitivity, 3677.5ms TimeCoverageRelationStatistics Valid=2470, Invalid=18122, Unknown=0, NotChecked=0, Total=20592 [2021-07-13 20:14:28,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-07-13 20:14:28,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 527. [2021-07-13 20:14:28,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 2.17680608365019) internal successors, (1145), 526 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:28,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1145 transitions. [2021-07-13 20:14:28,561 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1145 transitions. Word has length 47 [2021-07-13 20:14:28,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:28,561 INFO L482 AbstractCegarLoop]: Abstraction has 527 states and 1145 transitions. [2021-07-13 20:14:28,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:28,561 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1145 transitions. [2021-07-13 20:14:28,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:14:28,562 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:28,562 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:28,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:28,762 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:28,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:28,763 INFO L82 PathProgramCache]: Analyzing trace with hash -2071599167, now seen corresponding path program 182 times [2021-07-13 20:14:28,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:28,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95253845] [2021-07-13 20:14:28,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:28,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:29,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:29,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95253845] [2021-07-13 20:14:29,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95253845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:29,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327959368] [2021-07-13 20:14:29,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:29,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:14:29,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:29,151 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:14:29,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:29,728 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:29,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327959368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:29,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:29,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:14:29,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994948132] [2021-07-13 20:14:29,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:14:29,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:29,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:14:29,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1884, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:14:29,729 INFO L87 Difference]: Start difference. First operand 527 states and 1145 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:33,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:33,284 INFO L93 Difference]: Finished difference Result 945 states and 1898 transitions. [2021-07-13 20:14:33,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-07-13 20:14:33,284 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:14:33,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:33,286 INFO L225 Difference]: With dead ends: 945 [2021-07-13 20:14:33,286 INFO L226 Difference]: Without dead ends: 925 [2021-07-13 20:14:33,287 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5370 ImplicationChecksByTransitivity, 3373.7ms TimeCoverageRelationStatistics Valid=2321, Invalid=15235, Unknown=0, NotChecked=0, Total=17556 [2021-07-13 20:14:33,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2021-07-13 20:14:33,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 505. [2021-07-13 20:14:33,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.1626984126984126) internal successors, (1090), 504 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:33,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1090 transitions. [2021-07-13 20:14:33,292 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1090 transitions. Word has length 47 [2021-07-13 20:14:33,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:33,293 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1090 transitions. [2021-07-13 20:14:33,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:33,293 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1090 transitions. [2021-07-13 20:14:33,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:14:33,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:33,293 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:33,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:33,494 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:33,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:33,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1368922593, now seen corresponding path program 183 times [2021-07-13 20:14:33,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:33,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380843431] [2021-07-13 20:14:33,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:33,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:33,811 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:33,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:33,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380843431] [2021-07-13 20:14:33,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380843431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:33,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232829260] [2021-07-13 20:14:33,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:33,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 20:14:33,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:33,845 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:14:33,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:34,416 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:34,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232829260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:34,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:34,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:14:34,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000688844] [2021-07-13 20:14:34,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:14:34,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:34,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:14:34,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1918, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:14:34,417 INFO L87 Difference]: Start difference. First operand 505 states and 1090 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:37,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:37,369 INFO L93 Difference]: Finished difference Result 947 states and 1867 transitions. [2021-07-13 20:14:37,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-07-13 20:14:37,370 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:14:37,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:37,371 INFO L225 Difference]: With dead ends: 947 [2021-07-13 20:14:37,371 INFO L226 Difference]: Without dead ends: 891 [2021-07-13 20:14:37,372 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4884 ImplicationChecksByTransitivity, 2847.1ms TimeCoverageRelationStatistics Valid=1731, Invalid=14019, Unknown=0, NotChecked=0, Total=15750 [2021-07-13 20:14:37,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-07-13 20:14:37,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 509. [2021-07-13 20:14:37,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 2.161417322834646) internal successors, (1098), 508 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:37,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1098 transitions. [2021-07-13 20:14:37,377 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1098 transitions. Word has length 47 [2021-07-13 20:14:37,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:37,377 INFO L482 AbstractCegarLoop]: Abstraction has 509 states and 1098 transitions. [2021-07-13 20:14:37,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:37,377 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1098 transitions. [2021-07-13 20:14:37,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:14:37,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:37,378 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:37,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-07-13 20:14:37,579 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:37,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:37,579 INFO L82 PathProgramCache]: Analyzing trace with hash -782360283, now seen corresponding path program 184 times [2021-07-13 20:14:37,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:37,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757591674] [2021-07-13 20:14:37,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:37,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:37,903 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:37,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:37,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757591674] [2021-07-13 20:14:37,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757591674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:37,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881442091] [2021-07-13 20:14:37,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:37,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:14:37,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:37,930 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:14:37,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:38,518 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:38,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881442091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:38,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:38,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:14:38,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258736584] [2021-07-13 20:14:38,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:14:38,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:38,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:14:38,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1914, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:14:38,519 INFO L87 Difference]: Start difference. First operand 509 states and 1098 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:41,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:41,858 INFO L93 Difference]: Finished difference Result 954 states and 1892 transitions. [2021-07-13 20:14:41,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-07-13 20:14:41,858 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:14:41,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:41,859 INFO L225 Difference]: With dead ends: 954 [2021-07-13 20:14:41,859 INFO L226 Difference]: Without dead ends: 904 [2021-07-13 20:14:41,860 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5322 ImplicationChecksByTransitivity, 3059.0ms TimeCoverageRelationStatistics Valid=1901, Invalid=15129, Unknown=0, NotChecked=0, Total=17030 [2021-07-13 20:14:41,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-07-13 20:14:41,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 515. [2021-07-13 20:14:41,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.167315175097276) internal successors, (1114), 514 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:41,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1114 transitions. [2021-07-13 20:14:41,865 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1114 transitions. Word has length 47 [2021-07-13 20:14:41,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:41,865 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1114 transitions. [2021-07-13 20:14:41,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:41,866 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1114 transitions. [2021-07-13 20:14:41,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:14:41,866 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:41,866 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:42,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-07-13 20:14:42,067 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:42,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:42,067 INFO L82 PathProgramCache]: Analyzing trace with hash 247802217, now seen corresponding path program 185 times [2021-07-13 20:14:42,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:42,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048736310] [2021-07-13 20:14:42,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:42,397 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:42,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:42,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048736310] [2021-07-13 20:14:42,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048736310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:42,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912603156] [2021-07-13 20:14:42,398 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:42,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 20:14:42,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:42,427 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:14:42,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:43,005 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:43,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912603156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:43,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:43,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:14:43,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220198654] [2021-07-13 20:14:43,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:14:43,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:43,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:14:43,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1908, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:14:43,006 INFO L87 Difference]: Start difference. First operand 515 states and 1114 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:46,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:46,311 INFO L93 Difference]: Finished difference Result 964 states and 1922 transitions. [2021-07-13 20:14:46,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-07-13 20:14:46,312 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:14:46,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:46,313 INFO L225 Difference]: With dead ends: 964 [2021-07-13 20:14:46,313 INFO L226 Difference]: Without dead ends: 920 [2021-07-13 20:14:46,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5770 ImplicationChecksByTransitivity, 3198.3ms TimeCoverageRelationStatistics Valid=2082, Invalid=16278, Unknown=0, NotChecked=0, Total=18360 [2021-07-13 20:14:46,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-07-13 20:14:46,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 521. [2021-07-13 20:14:46,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 2.173076923076923) internal successors, (1130), 520 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:46,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1130 transitions. [2021-07-13 20:14:46,320 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1130 transitions. Word has length 47 [2021-07-13 20:14:46,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:46,320 INFO L482 AbstractCegarLoop]: Abstraction has 521 states and 1130 transitions. [2021-07-13 20:14:46,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:46,320 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1130 transitions. [2021-07-13 20:14:46,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:14:46,320 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:46,320 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:46,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:46,521 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:46,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:46,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1343845037, now seen corresponding path program 186 times [2021-07-13 20:14:46,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:46,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197488569] [2021-07-13 20:14:46,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:46,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:46,849 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:46,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:46,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197488569] [2021-07-13 20:14:46,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197488569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:46,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242193708] [2021-07-13 20:14:46,849 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:46,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 20:14:46,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:46,887 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:14:46,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:47,459 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:47,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242193708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:47,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:47,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:14:47,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549560240] [2021-07-13 20:14:47,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:14:47,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:47,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:14:47,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1898, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:14:47,461 INFO L87 Difference]: Start difference. First operand 521 states and 1130 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:51,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:51,039 INFO L93 Difference]: Finished difference Result 974 states and 1952 transitions. [2021-07-13 20:14:51,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-07-13 20:14:51,039 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:14:51,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:51,040 INFO L225 Difference]: With dead ends: 974 [2021-07-13 20:14:51,041 INFO L226 Difference]: Without dead ends: 936 [2021-07-13 20:14:51,041 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6232 ImplicationChecksByTransitivity, 3347.4ms TimeCoverageRelationStatistics Valid=2288, Invalid=17452, Unknown=0, NotChecked=0, Total=19740 [2021-07-13 20:14:51,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-07-13 20:14:51,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 527. [2021-07-13 20:14:51,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 2.178707224334601) internal successors, (1146), 526 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:51,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1146 transitions. [2021-07-13 20:14:51,047 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1146 transitions. Word has length 47 [2021-07-13 20:14:51,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:51,047 INFO L482 AbstractCegarLoop]: Abstraction has 527 states and 1146 transitions. [2021-07-13 20:14:51,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:51,047 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1146 transitions. [2021-07-13 20:14:51,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:14:51,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:51,048 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:51,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:51,248 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:51,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:51,249 INFO L82 PathProgramCache]: Analyzing trace with hash -2118697743, now seen corresponding path program 187 times [2021-07-13 20:14:51,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:51,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293626981] [2021-07-13 20:14:51,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:51,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:51,617 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:51,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:51,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293626981] [2021-07-13 20:14:51,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293626981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:51,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600614727] [2021-07-13 20:14:51,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:51,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:51,644 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:14:51,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:52,228 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:52,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600614727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:52,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:52,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:14:52,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122405971] [2021-07-13 20:14:52,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:14:52,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:52,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:14:52,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1881, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:14:52,229 INFO L87 Difference]: Start difference. First operand 527 states and 1146 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:56,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:56,214 INFO L93 Difference]: Finished difference Result 1084 states and 2152 transitions. [2021-07-13 20:14:56,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-07-13 20:14:56,215 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:14:56,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:56,216 INFO L225 Difference]: With dead ends: 1084 [2021-07-13 20:14:56,216 INFO L226 Difference]: Without dead ends: 1039 [2021-07-13 20:14:56,217 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6553 ImplicationChecksByTransitivity, 3702.7ms TimeCoverageRelationStatistics Valid=2500, Invalid=18380, Unknown=0, NotChecked=0, Total=20880 [2021-07-13 20:14:56,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-07-13 20:14:56,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 531. [2021-07-13 20:14:56,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 2.1830188679245284) internal successors, (1157), 530 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:56,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1157 transitions. [2021-07-13 20:14:56,223 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1157 transitions. Word has length 47 [2021-07-13 20:14:56,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:56,223 INFO L482 AbstractCegarLoop]: Abstraction has 531 states and 1157 transitions. [2021-07-13 20:14:56,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:56,223 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1157 transitions. [2021-07-13 20:14:56,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:14:56,223 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:56,223 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:56,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-07-13 20:14:56,424 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:56,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:56,424 INFO L82 PathProgramCache]: Analyzing trace with hash 911341693, now seen corresponding path program 188 times [2021-07-13 20:14:56,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:56,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965370805] [2021-07-13 20:14:56,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:56,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:56,793 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:56,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:56,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965370805] [2021-07-13 20:14:56,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965370805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:56,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110261475] [2021-07-13 20:14:56,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:56,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:14:56,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:56,822 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:14:56,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:57,404 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:57,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110261475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:57,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:57,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:14:57,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133245855] [2021-07-13 20:14:57,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:14:57,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:57,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:14:57,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1879, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:14:57,405 INFO L87 Difference]: Start difference. First operand 531 states and 1157 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:01,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:01,179 INFO L93 Difference]: Finished difference Result 937 states and 1886 transitions. [2021-07-13 20:15:01,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-07-13 20:15:01,179 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:15:01,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:01,180 INFO L225 Difference]: With dead ends: 937 [2021-07-13 20:15:01,180 INFO L226 Difference]: Without dead ends: 917 [2021-07-13 20:15:01,181 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5494 ImplicationChecksByTransitivity, 3436.7ms TimeCoverageRelationStatistics Valid=2362, Invalid=15460, Unknown=0, NotChecked=0, Total=17822 [2021-07-13 20:15:01,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2021-07-13 20:15:01,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 503. [2021-07-13 20:15:01,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.1553784860557768) internal successors, (1082), 502 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:01,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1082 transitions. [2021-07-13 20:15:01,186 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1082 transitions. Word has length 47 [2021-07-13 20:15:01,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:01,186 INFO L482 AbstractCegarLoop]: Abstraction has 503 states and 1082 transitions. [2021-07-13 20:15:01,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:01,186 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1082 transitions. [2021-07-13 20:15:01,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:15:01,187 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:01,187 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:01,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:01,391 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:01,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:01,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1288752927, now seen corresponding path program 189 times [2021-07-13 20:15:01,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:01,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896959284] [2021-07-13 20:15:01,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:01,756 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:01,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:01,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896959284] [2021-07-13 20:15:01,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896959284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:01,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894949099] [2021-07-13 20:15:01,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:01,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 20:15:01,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:01,796 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:15:01,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:02,450 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:02,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894949099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:02,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:02,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:15:02,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060261459] [2021-07-13 20:15:02,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:15:02,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:02,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:15:02,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1910, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:15:02,451 INFO L87 Difference]: Start difference. First operand 503 states and 1082 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:05,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:05,729 INFO L93 Difference]: Finished difference Result 924 states and 1824 transitions. [2021-07-13 20:15:05,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-07-13 20:15:05,730 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:15:05,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:05,731 INFO L225 Difference]: With dead ends: 924 [2021-07-13 20:15:05,731 INFO L226 Difference]: Without dead ends: 874 [2021-07-13 20:15:05,732 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5456 ImplicationChecksByTransitivity, 3313.3ms TimeCoverageRelationStatistics Valid=1879, Invalid=15413, Unknown=0, NotChecked=0, Total=17292 [2021-07-13 20:15:05,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-07-13 20:15:05,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 507. [2021-07-13 20:15:05,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 2.1541501976284585) internal successors, (1090), 506 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:05,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1090 transitions. [2021-07-13 20:15:05,737 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1090 transitions. Word has length 47 [2021-07-13 20:15:05,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:05,737 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1090 transitions. [2021-07-13 20:15:05,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:05,737 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1090 transitions. [2021-07-13 20:15:05,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:15:05,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:05,738 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:05,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-07-13 20:15:05,942 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:05,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:05,942 INFO L82 PathProgramCache]: Analyzing trace with hash -258590427, now seen corresponding path program 190 times [2021-07-13 20:15:05,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:05,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155539272] [2021-07-13 20:15:05,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:06,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:06,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155539272] [2021-07-13 20:15:06,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155539272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:06,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700565417] [2021-07-13 20:15:06,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:06,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:15:06,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:06,323 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:15:06,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:06,927 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:06,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700565417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:06,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:06,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:15:06,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536026473] [2021-07-13 20:15:06,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:15:06,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:06,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:15:06,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1904, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:15:06,928 INFO L87 Difference]: Start difference. First operand 507 states and 1090 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:10,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:10,585 INFO L93 Difference]: Finished difference Result 933 states and 1853 transitions. [2021-07-13 20:15:10,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-07-13 20:15:10,586 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:15:10,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:10,587 INFO L225 Difference]: With dead ends: 933 [2021-07-13 20:15:10,587 INFO L226 Difference]: Without dead ends: 889 [2021-07-13 20:15:10,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5922 ImplicationChecksByTransitivity, 3332.8ms TimeCoverageRelationStatistics Valid=2078, Invalid=16554, Unknown=0, NotChecked=0, Total=18632 [2021-07-13 20:15:10,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2021-07-13 20:15:10,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 513. [2021-07-13 20:15:10,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 2.16015625) internal successors, (1106), 512 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:10,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 1106 transitions. [2021-07-13 20:15:10,594 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 1106 transitions. Word has length 47 [2021-07-13 20:15:10,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:10,594 INFO L482 AbstractCegarLoop]: Abstraction has 513 states and 1106 transitions. [2021-07-13 20:15:10,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:10,595 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 1106 transitions. [2021-07-13 20:15:10,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:15:10,595 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:10,595 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:10,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:10,798 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:10,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:10,798 INFO L82 PathProgramCache]: Analyzing trace with hash 837452393, now seen corresponding path program 191 times [2021-07-13 20:15:10,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:10,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892677963] [2021-07-13 20:15:10,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:10,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:11,133 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:11,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:11,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892677963] [2021-07-13 20:15:11,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892677963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:11,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909634912] [2021-07-13 20:15:11,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:11,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 20:15:11,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:11,168 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:15:11,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:11,755 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:11,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909634912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:11,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:11,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:15:11,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528618057] [2021-07-13 20:15:11,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:15:11,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:11,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:15:11,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=1894, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:15:11,756 INFO L87 Difference]: Start difference. First operand 513 states and 1106 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:15,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:15,311 INFO L93 Difference]: Finished difference Result 945 states and 1887 transitions. [2021-07-13 20:15:15,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-07-13 20:15:15,312 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:15:15,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:15,313 INFO L225 Difference]: With dead ends: 945 [2021-07-13 20:15:15,313 INFO L226 Difference]: Without dead ends: 907 [2021-07-13 20:15:15,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6385 ImplicationChecksByTransitivity, 3440.0ms TimeCoverageRelationStatistics Valid=2293, Invalid=17729, Unknown=0, NotChecked=0, Total=20022 [2021-07-13 20:15:15,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2021-07-13 20:15:15,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 519. [2021-07-13 20:15:15,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 2.166023166023166) internal successors, (1122), 518 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:15,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1122 transitions. [2021-07-13 20:15:15,319 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1122 transitions. Word has length 47 [2021-07-13 20:15:15,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:15,319 INFO L482 AbstractCegarLoop]: Abstraction has 519 states and 1122 transitions. [2021-07-13 20:15:15,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:15,319 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1122 transitions. [2021-07-13 20:15:15,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:15:15,320 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:15,320 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:15,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:15,520 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:15,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:15,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1669876909, now seen corresponding path program 192 times [2021-07-13 20:15:15,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:15,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156752438] [2021-07-13 20:15:15,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:15,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:15,884 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:15,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:15,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156752438] [2021-07-13 20:15:15,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156752438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:15,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862185690] [2021-07-13 20:15:15,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:15,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 20:15:15,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:15,923 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:15:15,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:16,527 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:16,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862185690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:16,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:16,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:15:16,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476765980] [2021-07-13 20:15:16,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:15:16,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:16,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:15:16,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1877, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:15:16,528 INFO L87 Difference]: Start difference. First operand 519 states and 1122 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:20,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:20,816 INFO L93 Difference]: Finished difference Result 1057 states and 2091 transitions. [2021-07-13 20:15:20,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-07-13 20:15:20,816 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:15:20,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:20,817 INFO L225 Difference]: With dead ends: 1057 [2021-07-13 20:15:20,817 INFO L226 Difference]: Without dead ends: 1012 [2021-07-13 20:15:20,818 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6706 ImplicationChecksByTransitivity, 3768.2ms TimeCoverageRelationStatistics Valid=2514, Invalid=18656, Unknown=0, NotChecked=0, Total=21170 [2021-07-13 20:15:20,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2021-07-13 20:15:20,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 523. [2021-07-13 20:15:20,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 2.1704980842911876) internal successors, (1133), 522 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:20,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1133 transitions. [2021-07-13 20:15:20,824 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1133 transitions. Word has length 47 [2021-07-13 20:15:20,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:20,824 INFO L482 AbstractCegarLoop]: Abstraction has 523 states and 1133 transitions. [2021-07-13 20:15:20,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:20,824 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1133 transitions. [2021-07-13 20:15:20,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:15:20,825 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:20,825 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:21,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2021-07-13 20:15:21,026 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:21,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:21,026 INFO L82 PathProgramCache]: Analyzing trace with hash 404949049, now seen corresponding path program 193 times [2021-07-13 20:15:21,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:21,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647516277] [2021-07-13 20:15:21,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:21,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:21,390 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:21,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:21,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647516277] [2021-07-13 20:15:21,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647516277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:21,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800589889] [2021-07-13 20:15:21,390 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:21,417 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:15:21,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:22,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800589889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:22,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:22,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:15:22,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611822097] [2021-07-13 20:15:22,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:15:22,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:22,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:15:22,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1875, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:15:22,024 INFO L87 Difference]: Start difference. First operand 523 states and 1133 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:25,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:25,729 INFO L93 Difference]: Finished difference Result 913 states and 1830 transitions. [2021-07-13 20:15:25,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-07-13 20:15:25,730 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:15:25,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:25,731 INFO L225 Difference]: With dead ends: 913 [2021-07-13 20:15:25,731 INFO L226 Difference]: Without dead ends: 893 [2021-07-13 20:15:25,732 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5632 ImplicationChecksByTransitivity, 3578.5ms TimeCoverageRelationStatistics Valid=2386, Invalid=15704, Unknown=0, NotChecked=0, Total=18090 [2021-07-13 20:15:25,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-07-13 20:15:25,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 501. [2021-07-13 20:15:25,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 2.148) internal successors, (1074), 500 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:25,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1074 transitions. [2021-07-13 20:15:25,737 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1074 transitions. Word has length 47 [2021-07-13 20:15:25,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:25,738 INFO L482 AbstractCegarLoop]: Abstraction has 501 states and 1074 transitions. [2021-07-13 20:15:25,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:25,738 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1074 transitions. [2021-07-13 20:15:25,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:15:25,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:25,738 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:25,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-07-13 20:15:25,939 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:25,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:25,939 INFO L82 PathProgramCache]: Analyzing trace with hash -308279327, now seen corresponding path program 194 times [2021-07-13 20:15:25,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:25,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477718094] [2021-07-13 20:15:25,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:25,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:26,269 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:26,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:26,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477718094] [2021-07-13 20:15:26,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477718094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:26,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047407079] [2021-07-13 20:15:26,269 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:26,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:15:26,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:26,296 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:15:26,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:26,893 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:26,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047407079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:26,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:26,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:15:26,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668764250] [2021-07-13 20:15:26,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:15:26,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:26,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:15:26,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1901, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:15:26,894 INFO L87 Difference]: Start difference. First operand 501 states and 1074 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:30,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:30,235 INFO L93 Difference]: Finished difference Result 901 states and 1781 transitions. [2021-07-13 20:15:30,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-07-13 20:15:30,235 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:15:30,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:30,237 INFO L225 Difference]: With dead ends: 901 [2021-07-13 20:15:30,237 INFO L226 Difference]: Without dead ends: 857 [2021-07-13 20:15:30,238 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6064 ImplicationChecksByTransitivity, 3324.8ms TimeCoverageRelationStatistics Valid=2049, Invalid=16857, Unknown=0, NotChecked=0, Total=18906 [2021-07-13 20:15:30,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2021-07-13 20:15:30,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 505. [2021-07-13 20:15:30,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.1468253968253967) internal successors, (1082), 504 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:30,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1082 transitions. [2021-07-13 20:15:30,243 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1082 transitions. Word has length 47 [2021-07-13 20:15:30,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:30,243 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1082 transitions. [2021-07-13 20:15:30,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:30,244 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1082 transitions. [2021-07-13 20:15:30,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:15:30,244 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:30,244 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:30,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-07-13 20:15:30,445 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:30,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:30,445 INFO L82 PathProgramCache]: Analyzing trace with hash 787763493, now seen corresponding path program 195 times [2021-07-13 20:15:30,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:30,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869481990] [2021-07-13 20:15:30,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:30,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:30,770 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:30,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:30,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869481990] [2021-07-13 20:15:30,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869481990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:30,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957952125] [2021-07-13 20:15:30,770 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:30,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 20:15:30,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:30,802 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 74 conjunts are in the unsatisfiable core [2021-07-13 20:15:30,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:31,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957952125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:31,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:31,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2021-07-13 20:15:31,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032835518] [2021-07-13 20:15:31,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-07-13 20:15:31,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:31,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-07-13 20:15:31,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1977, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:15:31,476 INFO L87 Difference]: Start difference. First operand 505 states and 1082 transitions. Second operand has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:35,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:35,020 INFO L93 Difference]: Finished difference Result 907 states and 1805 transitions. [2021-07-13 20:15:35,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-07-13 20:15:35,021 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:15:35,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:35,022 INFO L225 Difference]: With dead ends: 907 [2021-07-13 20:15:35,022 INFO L226 Difference]: Without dead ends: 875 [2021-07-13 20:15:35,023 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6572 ImplicationChecksByTransitivity, 3483.7ms TimeCoverageRelationStatistics Valid=2282, Invalid=18024, Unknown=0, NotChecked=0, Total=20306 [2021-07-13 20:15:35,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-07-13 20:15:35,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 510. [2021-07-13 20:15:35,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 2.1532416502946954) internal successors, (1096), 509 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:35,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1096 transitions. [2021-07-13 20:15:35,028 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1096 transitions. Word has length 47 [2021-07-13 20:15:35,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:35,028 INFO L482 AbstractCegarLoop]: Abstraction has 510 states and 1096 transitions. [2021-07-13 20:15:35,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:35,028 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1096 transitions. [2021-07-13 20:15:35,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:15:35,029 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:35,029 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:35,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-07-13 20:15:35,230 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:35,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:35,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1620188009, now seen corresponding path program 196 times [2021-07-13 20:15:35,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:35,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591166643] [2021-07-13 20:15:35,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:35,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:35,587 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:35,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:35,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591166643] [2021-07-13 20:15:35,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591166643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:35,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507529578] [2021-07-13 20:15:35,587 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:35,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:15:35,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:35,614 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:15:35,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:36,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507529578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:36,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:36,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:15:36,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482791552] [2021-07-13 20:15:36,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:15:36,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:36,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:15:36,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1874, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:15:36,204 INFO L87 Difference]: Start difference. First operand 510 states and 1096 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:40,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:40,418 INFO L93 Difference]: Finished difference Result 1031 states and 2030 transitions. [2021-07-13 20:15:40,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-07-13 20:15:40,418 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:15:40,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:40,419 INFO L225 Difference]: With dead ends: 1031 [2021-07-13 20:15:40,419 INFO L226 Difference]: Without dead ends: 977 [2021-07-13 20:15:40,420 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6988 ImplicationChecksByTransitivity, 3905.6ms TimeCoverageRelationStatistics Valid=2535, Invalid=19221, Unknown=0, NotChecked=0, Total=21756 [2021-07-13 20:15:40,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-07-13 20:15:40,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 515. [2021-07-13 20:15:40,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.157587548638132) internal successors, (1109), 514 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:40,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1109 transitions. [2021-07-13 20:15:40,426 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1109 transitions. Word has length 47 [2021-07-13 20:15:40,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:40,426 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1109 transitions. [2021-07-13 20:15:40,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:40,426 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1109 transitions. [2021-07-13 20:15:40,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:15:40,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:40,427 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:40,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-07-13 20:15:40,627 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:40,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:40,628 INFO L82 PathProgramCache]: Analyzing trace with hash 355260149, now seen corresponding path program 197 times [2021-07-13 20:15:40,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:40,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89512306] [2021-07-13 20:15:40,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:40,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:41,003 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:41,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:41,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89512306] [2021-07-13 20:15:41,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89512306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:41,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565501846] [2021-07-13 20:15:41,004 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:41,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 20:15:41,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:41,036 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:15:41,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:41,643 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:41,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565501846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:41,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:41,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:15:41,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926380687] [2021-07-13 20:15:41,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:15:41,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:41,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:15:41,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1872, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:15:41,644 INFO L87 Difference]: Start difference. First operand 515 states and 1109 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:45,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:45,341 INFO L93 Difference]: Finished difference Result 881 states and 1758 transitions. [2021-07-13 20:15:45,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-07-13 20:15:45,341 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:15:45,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:45,342 INFO L225 Difference]: With dead ends: 881 [2021-07-13 20:15:45,342 INFO L226 Difference]: Without dead ends: 861 [2021-07-13 20:15:45,344 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5783 ImplicationChecksByTransitivity, 3680.7ms TimeCoverageRelationStatistics Valid=2393, Invalid=15967, Unknown=0, NotChecked=0, Total=18360 [2021-07-13 20:15:45,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-07-13 20:15:45,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 499. [2021-07-13 20:15:45,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 2.140562248995984) internal successors, (1066), 498 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:45,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1066 transitions. [2021-07-13 20:15:45,349 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1066 transitions. Word has length 47 [2021-07-13 20:15:45,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:45,349 INFO L482 AbstractCegarLoop]: Abstraction has 499 states and 1066 transitions. [2021-07-13 20:15:45,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:45,349 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1066 transitions. [2021-07-13 20:15:45,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:15:45,350 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:45,350 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:45,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-07-13 20:15:45,551 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:45,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:45,551 INFO L82 PathProgramCache]: Analyzing trace with hash -329605407, now seen corresponding path program 198 times [2021-07-13 20:15:45,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:45,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312541156] [2021-07-13 20:15:45,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:45,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:45,887 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:45,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:45,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312541156] [2021-07-13 20:15:45,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312541156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:45,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550805203] [2021-07-13 20:15:45,887 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:45,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 20:15:45,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:45,919 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:15:45,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:46,525 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:46,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550805203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:46,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:46,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:15:46,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956348924] [2021-07-13 20:15:46,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:15:46,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:46,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:15:46,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1889, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:15:46,526 INFO L87 Difference]: Start difference. First operand 499 states and 1066 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:50,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:50,304 INFO L93 Difference]: Finished difference Result 858 states and 1689 transitions. [2021-07-13 20:15:50,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-07-13 20:15:50,305 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:15:50,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:50,306 INFO L225 Difference]: With dead ends: 858 [2021-07-13 20:15:50,306 INFO L226 Difference]: Without dead ends: 820 [2021-07-13 20:15:50,307 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6703 ImplicationChecksByTransitivity, 3578.0ms TimeCoverageRelationStatistics Valid=2246, Invalid=18346, Unknown=0, NotChecked=0, Total=20592 [2021-07-13 20:15:50,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-07-13 20:15:50,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 503. [2021-07-13 20:15:50,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.139442231075697) internal successors, (1074), 502 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:50,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1074 transitions. [2021-07-13 20:15:50,313 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1074 transitions. Word has length 47 [2021-07-13 20:15:50,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:50,313 INFO L482 AbstractCegarLoop]: Abstraction has 503 states and 1074 transitions. [2021-07-13 20:15:50,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:50,313 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1074 transitions. [2021-07-13 20:15:50,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:15:50,313 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:50,313 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:50,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:50,514 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:50,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:50,514 INFO L82 PathProgramCache]: Analyzing trace with hash 502819109, now seen corresponding path program 199 times [2021-07-13 20:15:50,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:50,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968203218] [2021-07-13 20:15:50,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:50,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:50,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968203218] [2021-07-13 20:15:50,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968203218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:50,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924451937] [2021-07-13 20:15:50,894 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:50,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:50,923 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:15:50,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:51,535 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:51,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924451937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:51,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:51,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:15:51,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733730877] [2021-07-13 20:15:51,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:15:51,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:51,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:15:51,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1872, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:15:51,537 INFO L87 Difference]: Start difference. First operand 503 states and 1074 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:55,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:55,510 INFO L93 Difference]: Finished difference Result 963 states and 1875 transitions. [2021-07-13 20:15:55,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-07-13 20:15:55,511 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:15:55,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:55,512 INFO L225 Difference]: With dead ends: 963 [2021-07-13 20:15:55,512 INFO L226 Difference]: Without dead ends: 918 [2021-07-13 20:15:55,513 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7057 ImplicationChecksByTransitivity, 3877.2ms TimeCoverageRelationStatistics Valid=2494, Invalid=19262, Unknown=0, NotChecked=0, Total=21756 [2021-07-13 20:15:55,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-07-13 20:15:55,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 505. [2021-07-13 20:15:55,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.140873015873016) internal successors, (1079), 504 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:55,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1079 transitions. [2021-07-13 20:15:55,518 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1079 transitions. Word has length 47 [2021-07-13 20:15:55,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:55,519 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1079 transitions. [2021-07-13 20:15:55,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:55,519 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1079 transitions. [2021-07-13 20:15:55,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:15:55,519 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:55,519 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:55,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-07-13 20:15:55,720 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:55,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:55,720 INFO L82 PathProgramCache]: Analyzing trace with hash -762108751, now seen corresponding path program 200 times [2021-07-13 20:15:55,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:55,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979897887] [2021-07-13 20:15:55,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:56,083 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:56,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:56,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979897887] [2021-07-13 20:15:56,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979897887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:56,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231004931] [2021-07-13 20:15:56,083 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:56,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:15:56,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:56,110 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:15:56,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:56,718 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:56,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231004931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:56,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:56,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:15:56,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345995211] [2021-07-13 20:15:56,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:15:56,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:56,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:15:56,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1870, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:15:56,719 INFO L87 Difference]: Start difference. First operand 505 states and 1079 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:00,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:00,430 INFO L93 Difference]: Finished difference Result 845 states and 1674 transitions. [2021-07-13 20:16:00,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-07-13 20:16:00,430 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:16:00,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:00,431 INFO L225 Difference]: With dead ends: 845 [2021-07-13 20:16:00,431 INFO L226 Difference]: Without dead ends: 825 [2021-07-13 20:16:00,432 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5942 ImplicationChecksByTransitivity, 3630.0ms TimeCoverageRelationStatistics Valid=2384, Invalid=16248, Unknown=0, NotChecked=0, Total=18632 [2021-07-13 20:16:00,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-07-13 20:16:00,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 493. [2021-07-13 20:16:00,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 2.1260162601626016) internal successors, (1046), 492 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:00,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1046 transitions. [2021-07-13 20:16:00,437 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1046 transitions. Word has length 47 [2021-07-13 20:16:00,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:00,437 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1046 transitions. [2021-07-13 20:16:00,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:00,437 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1046 transitions. [2021-07-13 20:16:00,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:16:00,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:00,438 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:00,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:00,639 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:00,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:00,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1227950623, now seen corresponding path program 201 times [2021-07-13 20:16:00,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:00,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718038207] [2021-07-13 20:16:00,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:00,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:00,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:00,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718038207] [2021-07-13 20:16:00,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718038207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:00,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711885818] [2021-07-13 20:16:00,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:00,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 20:16:00,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:00,978 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:16:00,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:01,579 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:01,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711885818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:01,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:01,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:16:01,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975592440] [2021-07-13 20:16:01,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:16:01,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:01,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:16:01,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1873, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:16:01,580 INFO L87 Difference]: Start difference. First operand 493 states and 1046 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:06,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:06,227 INFO L93 Difference]: Finished difference Result 986 states and 1986 transitions. [2021-07-13 20:16:06,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-07-13 20:16:06,227 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:16:06,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:06,229 INFO L225 Difference]: With dead ends: 986 [2021-07-13 20:16:06,229 INFO L226 Difference]: Without dead ends: 938 [2021-07-13 20:16:06,230 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8617 ImplicationChecksByTransitivity, 4394.7ms TimeCoverageRelationStatistics Valid=2834, Invalid=22606, Unknown=0, NotChecked=0, Total=25440 [2021-07-13 20:16:06,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-07-13 20:16:06,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 509. [2021-07-13 20:16:06,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 2.127952755905512) internal successors, (1081), 508 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:06,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1081 transitions. [2021-07-13 20:16:06,236 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1081 transitions. Word has length 47 [2021-07-13 20:16:06,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:06,236 INFO L482 AbstractCegarLoop]: Abstraction has 509 states and 1081 transitions. [2021-07-13 20:16:06,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:06,236 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1081 transitions. [2021-07-13 20:16:06,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:16:06,237 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:06,237 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:06,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:06,437 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:06,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:06,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1802088813, now seen corresponding path program 202 times [2021-07-13 20:16:06,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:06,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317632591] [2021-07-13 20:16:06,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:06,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:06,739 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:06,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:06,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317632591] [2021-07-13 20:16:06,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317632591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:06,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910403550] [2021-07-13 20:16:06,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:06,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:16:06,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:06,769 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:16:06,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:07,354 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:07,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910403550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:07,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:07,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-07-13 20:16:07,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276858770] [2021-07-13 20:16:07,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-13 20:16:07,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:07,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-13 20:16:07,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1857, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:16:07,355 INFO L87 Difference]: Start difference. First operand 509 states and 1081 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:11,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:11,233 INFO L93 Difference]: Finished difference Result 1017 states and 2034 transitions. [2021-07-13 20:16:11,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-07-13 20:16:11,233 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:16:11,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:11,234 INFO L225 Difference]: With dead ends: 1017 [2021-07-13 20:16:11,234 INFO L226 Difference]: Without dead ends: 969 [2021-07-13 20:16:11,235 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6758 ImplicationChecksByTransitivity, 3653.1ms TimeCoverageRelationStatistics Valid=2550, Invalid=18330, Unknown=0, NotChecked=0, Total=20880 [2021-07-13 20:16:11,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-07-13 20:16:11,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 506. [2021-07-13 20:16:11,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.120792079207921) internal successors, (1071), 505 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:11,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1071 transitions. [2021-07-13 20:16:11,241 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1071 transitions. Word has length 47 [2021-07-13 20:16:11,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:11,241 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1071 transitions. [2021-07-13 20:16:11,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:11,241 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1071 transitions. [2021-07-13 20:16:11,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:16:11,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:11,241 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:11,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:11,442 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:11,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:11,442 INFO L82 PathProgramCache]: Analyzing trace with hash 635930283, now seen corresponding path program 203 times [2021-07-13 20:16:11,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:11,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622963059] [2021-07-13 20:16:11,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:11,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:11,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622963059] [2021-07-13 20:16:11,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622963059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:11,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464482969] [2021-07-13 20:16:11,834 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:11,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-13 20:16:11,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:11,865 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-13 20:16:11,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:12,513 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:12,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464482969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:12,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:12,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 39 [2021-07-13 20:16:12,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135624175] [2021-07-13 20:16:12,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:16:12,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:12,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:16:12,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1432, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:16:12,514 INFO L87 Difference]: Start difference. First operand 506 states and 1071 transitions. Second operand has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:20,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:20,316 INFO L93 Difference]: Finished difference Result 1005 states and 2058 transitions. [2021-07-13 20:16:20,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-07-13 20:16:20,317 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:16:20,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:20,318 INFO L225 Difference]: With dead ends: 1005 [2021-07-13 20:16:20,318 INFO L226 Difference]: Without dead ends: 979 [2021-07-13 20:16:20,319 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8517 ImplicationChecksByTransitivity, 6588.5ms TimeCoverageRelationStatistics Valid=1668, Invalid=22202, Unknown=0, NotChecked=0, Total=23870 [2021-07-13 20:16:20,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2021-07-13 20:16:20,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 479. [2021-07-13 20:16:20,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 2.1297071129707112) internal successors, (1018), 478 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:20,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1018 transitions. [2021-07-13 20:16:20,325 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1018 transitions. Word has length 47 [2021-07-13 20:16:20,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:20,325 INFO L482 AbstractCegarLoop]: Abstraction has 479 states and 1018 transitions. [2021-07-13 20:16:20,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:20,325 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1018 transitions. [2021-07-13 20:16:20,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-07-13 20:16:20,325 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:20,325 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:20,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-07-13 20:16:20,526 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:20,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:20,526 INFO L82 PathProgramCache]: Analyzing trace with hash -820206049, now seen corresponding path program 204 times [2021-07-13 20:16:20,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:20,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244534338] [2021-07-13 20:16:20,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:20,608 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:16:20,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:20,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244534338] [2021-07-13 20:16:20,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244534338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:20,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934171119] [2021-07-13 20:16:20,609 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:20,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 20:16:20,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:20,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 20:16:20,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:16:20,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934171119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:20,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:20,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-13 20:16:20,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588474750] [2021-07-13 20:16:20,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:16:20,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:20,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:16:20,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:16:20,720 INFO L87 Difference]: Start difference. First operand 479 states and 1018 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:20,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:20,918 INFO L93 Difference]: Finished difference Result 794 states and 1629 transitions. [2021-07-13 20:16:20,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:16:20,918 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-07-13 20:16:20,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:20,919 INFO L225 Difference]: With dead ends: 794 [2021-07-13 20:16:20,919 INFO L226 Difference]: Without dead ends: 719 [2021-07-13 20:16:20,919 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 133.2ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:16:20,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-07-13 20:16:20,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 539. [2021-07-13 20:16:20,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 2.1282527881040894) internal successors, (1145), 538 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:20,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1145 transitions. [2021-07-13 20:16:20,925 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1145 transitions. Word has length 49 [2021-07-13 20:16:20,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:20,925 INFO L482 AbstractCegarLoop]: Abstraction has 539 states and 1145 transitions. [2021-07-13 20:16:20,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:20,925 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1145 transitions. [2021-07-13 20:16:20,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-07-13 20:16:20,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:20,925 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:21,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:21,126 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:21,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:21,126 INFO L82 PathProgramCache]: Analyzing trace with hash -300420567, now seen corresponding path program 205 times [2021-07-13 20:16:21,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:21,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543114971] [2021-07-13 20:16:21,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:21,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:21,563 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:21,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:21,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543114971] [2021-07-13 20:16:21,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543114971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:21,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856093802] [2021-07-13 20:16:21,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:21,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:21,592 WARN L261 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 77 conjunts are in the unsatisfiable core [2021-07-13 20:16:21,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:22,376 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:22,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856093802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:22,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:22,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 47 [2021-07-13 20:16:22,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315002660] [2021-07-13 20:16:22,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-07-13 20:16:22,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:22,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-07-13 20:16:22,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2027, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:16:22,377 INFO L87 Difference]: Start difference. First operand 539 states and 1145 transitions. Second operand has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:29,671 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-07-13 20:16:29,854 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2021-07-13 20:16:31,148 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2021-07-13 20:16:34,956 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-07-13 20:16:35,113 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-07-13 20:16:35,473 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2021-07-13 20:16:37,362 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2021-07-13 20:16:37,544 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2021-07-13 20:16:37,753 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 90 [2021-07-13 20:16:37,935 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 84 [2021-07-13 20:16:39,940 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 90 [2021-07-13 20:16:40,206 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 81 [2021-07-13 20:16:40,391 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 84 [2021-07-13 20:16:40,623 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 82 [2021-07-13 20:16:41,317 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 79 [2021-07-13 20:16:44,237 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-07-13 20:16:47,942 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-07-13 20:16:58,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:58,531 INFO L93 Difference]: Finished difference Result 4196 states and 8343 transitions. [2021-07-13 20:16:58,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 467 states. [2021-07-13 20:16:58,531 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-07-13 20:16:58,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:58,536 INFO L225 Difference]: With dead ends: 4196 [2021-07-13 20:16:58,536 INFO L226 Difference]: Without dead ends: 4128 [2021-07-13 20:16:58,543 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 481 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107198 ImplicationChecksByTransitivity, 31296.6ms TimeCoverageRelationStatistics Valid=25835, Invalid=206971, Unknown=0, NotChecked=0, Total=232806 [2021-07-13 20:16:58,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4128 states. [2021-07-13 20:16:58,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4128 to 953. [2021-07-13 20:16:58,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 2.1449579831932772) internal successors, (2042), 952 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:58,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 2042 transitions. [2021-07-13 20:16:58,563 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 2042 transitions. Word has length 49 [2021-07-13 20:16:58,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:58,563 INFO L482 AbstractCegarLoop]: Abstraction has 953 states and 2042 transitions. [2021-07-13 20:16:58,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:58,563 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 2042 transitions. [2021-07-13 20:16:58,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-07-13 20:16:58,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:58,564 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:58,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-07-13 20:16:58,765 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:58,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:58,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1788875737, now seen corresponding path program 206 times [2021-07-13 20:16:58,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:58,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199098523] [2021-07-13 20:16:58,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:58,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:59,139 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:16:59,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:59,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199098523] [2021-07-13 20:16:59,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199098523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:59,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908851901] [2021-07-13 20:16:59,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:59,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:16:59,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:59,167 WARN L261 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 74 conjunts are in the unsatisfiable core [2021-07-13 20:16:59,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:59,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908851901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:59,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:59,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2021-07-13 20:16:59,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409789986] [2021-07-13 20:16:59,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-07-13 20:16:59,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:59,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-07-13 20:16:59,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2098, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:16:59,946 INFO L87 Difference]: Start difference. First operand 953 states and 2042 transitions. Second operand has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:04,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:04,399 INFO L93 Difference]: Finished difference Result 1583 states and 3270 transitions. [2021-07-13 20:17:04,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-07-13 20:17:04,399 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-07-13 20:17:04,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:04,401 INFO L225 Difference]: With dead ends: 1583 [2021-07-13 20:17:04,401 INFO L226 Difference]: Without dead ends: 1535 [2021-07-13 20:17:04,402 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5681 ImplicationChecksByTransitivity, 3774.3ms TimeCoverageRelationStatistics Valid=965, Invalid=16591, Unknown=0, NotChecked=0, Total=17556 [2021-07-13 20:17:04,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2021-07-13 20:17:04,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 875. [2021-07-13 20:17:04,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 2.151029748283753) internal successors, (1880), 874 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:04,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1880 transitions. [2021-07-13 20:17:04,411 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1880 transitions. Word has length 49 [2021-07-13 20:17:04,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:04,412 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 1880 transitions. [2021-07-13 20:17:04,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:04,412 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1880 transitions. [2021-07-13 20:17:04,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-13 20:17:04,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:04,413 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:04,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-07-13 20:17:04,613 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:04,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:04,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1059402165, now seen corresponding path program 207 times [2021-07-13 20:17:04,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:04,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123047858] [2021-07-13 20:17:04,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:04,988 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:04,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:04,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123047858] [2021-07-13 20:17:04,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123047858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:04,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469201150] [2021-07-13 20:17:04,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:05,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 20:17:05,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:05,022 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 81 conjunts are in the unsatisfiable core [2021-07-13 20:17:05,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:05,669 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:05,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469201150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:05,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:05,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-07-13 20:17:05,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422359981] [2021-07-13 20:17:05,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-13 20:17:05,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:05,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-13 20:17:05,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=2263, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:17:05,670 INFO L87 Difference]: Start difference. First operand 875 states and 1880 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:08,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:08,651 INFO L93 Difference]: Finished difference Result 1900 states and 4012 transitions. [2021-07-13 20:17:08,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-07-13 20:17:08,652 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-07-13 20:17:08,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:08,654 INFO L225 Difference]: With dead ends: 1900 [2021-07-13 20:17:08,654 INFO L226 Difference]: Without dead ends: 1815 [2021-07-13 20:17:08,655 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4593 ImplicationChecksByTransitivity, 3018.1ms TimeCoverageRelationStatistics Valid=1932, Invalid=13568, Unknown=0, NotChecked=0, Total=15500 [2021-07-13 20:17:08,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2021-07-13 20:17:08,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1155. [2021-07-13 20:17:08,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 1154 states have (on average 2.2435008665511265) internal successors, (2589), 1154 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:08,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 2589 transitions. [2021-07-13 20:17:08,667 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 2589 transitions. Word has length 51 [2021-07-13 20:17:08,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:08,667 INFO L482 AbstractCegarLoop]: Abstraction has 1155 states and 2589 transitions. [2021-07-13 20:17:08,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:08,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 2589 transitions. [2021-07-13 20:17:08,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-13 20:17:08,668 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:08,668 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:08,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-07-13 20:17:08,869 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:08,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:08,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1942809299, now seen corresponding path program 208 times [2021-07-13 20:17:08,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:08,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903807483] [2021-07-13 20:17:08,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:09,205 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:09,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:09,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903807483] [2021-07-13 20:17:09,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903807483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:09,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092333840] [2021-07-13 20:17:09,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:09,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:17:09,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:09,234 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 81 conjunts are in the unsatisfiable core [2021-07-13 20:17:09,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:09,880 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:09,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092333840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:09,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:09,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-07-13 20:17:09,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403177931] [2021-07-13 20:17:09,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-13 20:17:09,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:09,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-13 20:17:09,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=2275, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:17:09,881 INFO L87 Difference]: Start difference. First operand 1155 states and 2589 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:13,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:13,007 INFO L93 Difference]: Finished difference Result 1950 states and 4095 transitions. [2021-07-13 20:17:13,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-07-13 20:17:13,007 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-07-13 20:17:13,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:13,010 INFO L225 Difference]: With dead ends: 1950 [2021-07-13 20:17:13,010 INFO L226 Difference]: Without dead ends: 1876 [2021-07-13 20:17:13,011 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5054 ImplicationChecksByTransitivity, 3148.3ms TimeCoverageRelationStatistics Valid=2016, Invalid=14754, Unknown=0, NotChecked=0, Total=16770 [2021-07-13 20:17:13,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1876 states. [2021-07-13 20:17:13,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1876 to 1157. [2021-07-13 20:17:13,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.2430795847750864) internal successors, (2593), 1156 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:13,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 2593 transitions. [2021-07-13 20:17:13,026 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 2593 transitions. Word has length 51 [2021-07-13 20:17:13,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:13,026 INFO L482 AbstractCegarLoop]: Abstraction has 1157 states and 2593 transitions. [2021-07-13 20:17:13,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:13,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 2593 transitions. [2021-07-13 20:17:13,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-13 20:17:13,027 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:13,027 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:13,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable438 [2021-07-13 20:17:13,228 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:13,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:13,228 INFO L82 PathProgramCache]: Analyzing trace with hash -539398377, now seen corresponding path program 209 times [2021-07-13 20:17:13,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:13,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728521848] [2021-07-13 20:17:13,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:13,580 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:13,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:13,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728521848] [2021-07-13 20:17:13,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728521848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:13,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734515913] [2021-07-13 20:17:13,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:13,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 20:17:13,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:13,614 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 81 conjunts are in the unsatisfiable core [2021-07-13 20:17:13,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:14,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734515913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:14,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:14,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-07-13 20:17:14,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167120873] [2021-07-13 20:17:14,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-13 20:17:14,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:14,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-13 20:17:14,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2283, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:17:14,294 INFO L87 Difference]: Start difference. First operand 1157 states and 2593 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:17,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:17,574 INFO L93 Difference]: Finished difference Result 1948 states and 4093 transitions. [2021-07-13 20:17:17,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-07-13 20:17:17,575 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-07-13 20:17:17,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:17,577 INFO L225 Difference]: With dead ends: 1948 [2021-07-13 20:17:17,577 INFO L226 Difference]: Without dead ends: 1880 [2021-07-13 20:17:17,578 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5509 ImplicationChecksByTransitivity, 3279.4ms TimeCoverageRelationStatistics Valid=2113, Invalid=15977, Unknown=0, NotChecked=0, Total=18090 [2021-07-13 20:17:17,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2021-07-13 20:17:17,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1159. [2021-07-13 20:17:17,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 1158 states have (on average 2.2426597582037995) internal successors, (2597), 1158 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:17,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 2597 transitions. [2021-07-13 20:17:17,591 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 2597 transitions. Word has length 51 [2021-07-13 20:17:17,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:17,591 INFO L482 AbstractCegarLoop]: Abstraction has 1159 states and 2597 transitions. [2021-07-13 20:17:17,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:17,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 2597 transitions. [2021-07-13 20:17:17,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-13 20:17:17,592 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:17,592 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:17,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:17,793 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:17,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:17,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1929524315, now seen corresponding path program 210 times [2021-07-13 20:17:17,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:17,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325478740] [2021-07-13 20:17:17,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:17,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:18,156 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:18,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:18,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325478740] [2021-07-13 20:17:18,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325478740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:18,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599831097] [2021-07-13 20:17:18,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:18,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-13 20:17:18,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:18,189 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 79 conjunts are in the unsatisfiable core [2021-07-13 20:17:18,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:18,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599831097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:18,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:18,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-07-13 20:17:18,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129230322] [2021-07-13 20:17:18,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-13 20:17:18,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:18,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-13 20:17:18,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=2290, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:17:18,885 INFO L87 Difference]: Start difference. First operand 1159 states and 2597 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:22,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:22,728 INFO L93 Difference]: Finished difference Result 1946 states and 4091 transitions. [2021-07-13 20:17:22,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-07-13 20:17:22,728 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-07-13 20:17:22,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:22,730 INFO L225 Difference]: With dead ends: 1946 [2021-07-13 20:17:22,730 INFO L226 Difference]: Without dead ends: 1884 [2021-07-13 20:17:22,732 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5869 ImplicationChecksByTransitivity, 3584.0ms TimeCoverageRelationStatistics Valid=2235, Invalid=17225, Unknown=0, NotChecked=0, Total=19460 [2021-07-13 20:17:22,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2021-07-13 20:17:22,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1161. [2021-07-13 20:17:22,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 1160 states have (on average 2.242241379310345) internal successors, (2601), 1160 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:22,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 2601 transitions. [2021-07-13 20:17:22,745 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 2601 transitions. Word has length 51 [2021-07-13 20:17:22,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:22,745 INFO L482 AbstractCegarLoop]: Abstraction has 1161 states and 2601 transitions. [2021-07-13 20:17:22,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:22,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 2601 transitions. [2021-07-13 20:17:22,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-13 20:17:22,746 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:22,746 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:22,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:22,947 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:22,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:22,947 INFO L82 PathProgramCache]: Analyzing trace with hash 425949855, now seen corresponding path program 211 times [2021-07-13 20:17:22,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:22,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763428231] [2021-07-13 20:17:22,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:22,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:23,341 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:23,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:23,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763428231] [2021-07-13 20:17:23,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763428231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:23,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023732192] [2021-07-13 20:17:23,341 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:23,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:23,370 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 81 conjunts are in the unsatisfiable core [2021-07-13 20:17:23,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:24,023 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:24,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023732192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:24,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:24,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-07-13 20:17:24,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090673018] [2021-07-13 20:17:24,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-13 20:17:24,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:24,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-13 20:17:24,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=2285, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:17:24,025 INFO L87 Difference]: Start difference. First operand 1161 states and 2601 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:27,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:27,949 INFO L93 Difference]: Finished difference Result 1944 states and 4089 transitions. [2021-07-13 20:17:27,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-07-13 20:17:27,950 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-07-13 20:17:27,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:27,952 INFO L225 Difference]: With dead ends: 1944 [2021-07-13 20:17:27,952 INFO L226 Difference]: Without dead ends: 1888 [2021-07-13 20:17:27,953 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6469 ImplicationChecksByTransitivity, 3593.5ms TimeCoverageRelationStatistics Valid=2387, Invalid=18493, Unknown=0, NotChecked=0, Total=20880 [2021-07-13 20:17:27,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2021-07-13 20:17:27,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1163. [2021-07-13 20:17:27,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 1162 states have (on average 2.2418244406196215) internal successors, (2605), 1162 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:27,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 2605 transitions. [2021-07-13 20:17:27,966 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 2605 transitions. Word has length 51 [2021-07-13 20:17:27,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:27,966 INFO L482 AbstractCegarLoop]: Abstraction has 1163 states and 2605 transitions. [2021-07-13 20:17:27,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:27,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 2605 transitions. [2021-07-13 20:17:27,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-13 20:17:27,967 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:27,967 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:28,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-07-13 20:17:28,168 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:28,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:28,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1725333021, now seen corresponding path program 212 times [2021-07-13 20:17:28,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:28,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356903121] [2021-07-13 20:17:28,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:28,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:28,529 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:28,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:28,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356903121] [2021-07-13 20:17:28,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356903121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:28,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024541638] [2021-07-13 20:17:28,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:28,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:17:28,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:28,559 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 81 conjunts are in the unsatisfiable core [2021-07-13 20:17:28,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:29,218 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:29,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024541638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:29,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:29,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-07-13 20:17:29,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847842243] [2021-07-13 20:17:29,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-13 20:17:29,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:29,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-13 20:17:29,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=2281, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:17:29,219 INFO L87 Difference]: Start difference. First operand 1163 states and 2605 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:33,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:33,098 INFO L93 Difference]: Finished difference Result 1942 states and 4087 transitions. [2021-07-13 20:17:33,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-07-13 20:17:33,099 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-07-13 20:17:33,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:33,101 INFO L225 Difference]: With dead ends: 1942 [2021-07-13 20:17:33,101 INFO L226 Difference]: Without dead ends: 1892 [2021-07-13 20:17:33,102 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6976 ImplicationChecksByTransitivity, 3734.5ms TimeCoverageRelationStatistics Valid=2559, Invalid=19791, Unknown=0, NotChecked=0, Total=22350 [2021-07-13 20:17:33,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2021-07-13 20:17:33,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 1165. [2021-07-13 20:17:33,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 2.241408934707904) internal successors, (2609), 1164 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:33,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 2609 transitions. [2021-07-13 20:17:33,115 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 2609 transitions. Word has length 51 [2021-07-13 20:17:33,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:33,115 INFO L482 AbstractCegarLoop]: Abstraction has 1165 states and 2609 transitions. [2021-07-13 20:17:33,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:33,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 2609 transitions. [2021-07-13 20:17:33,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-13 20:17:33,116 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:33,116 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:33,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:33,317 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:33,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:33,317 INFO L82 PathProgramCache]: Analyzing trace with hash -695170521, now seen corresponding path program 213 times [2021-07-13 20:17:33,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:33,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883269903] [2021-07-13 20:17:33,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:33,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:33,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:33,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883269903] [2021-07-13 20:17:33,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883269903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:33,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855344642] [2021-07-13 20:17:33,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:33,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 20:17:33,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:33,719 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 81 conjunts are in the unsatisfiable core [2021-07-13 20:17:33,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:34,379 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:34,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855344642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:34,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:34,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-07-13 20:17:34,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185421919] [2021-07-13 20:17:34,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-13 20:17:34,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:34,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-13 20:17:34,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=2273, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:17:34,380 INFO L87 Difference]: Start difference. First operand 1165 states and 2609 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:38,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:38,615 INFO L93 Difference]: Finished difference Result 1940 states and 4085 transitions. [2021-07-13 20:17:38,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-07-13 20:17:38,616 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-07-13 20:17:38,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:38,618 INFO L225 Difference]: With dead ends: 1940 [2021-07-13 20:17:38,618 INFO L226 Difference]: Without dead ends: 1896 [2021-07-13 20:17:38,619 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7501 ImplicationChecksByTransitivity, 3850.2ms TimeCoverageRelationStatistics Valid=2756, Invalid=21114, Unknown=0, NotChecked=0, Total=23870 [2021-07-13 20:17:38,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2021-07-13 20:17:38,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1167. [2021-07-13 20:17:38,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1166 states have (on average 2.2409948542024014) internal successors, (2613), 1166 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:38,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 2613 transitions. [2021-07-13 20:17:38,632 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 2613 transitions. Word has length 51 [2021-07-13 20:17:38,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:38,632 INFO L482 AbstractCegarLoop]: Abstraction has 1167 states and 2613 transitions. [2021-07-13 20:17:38,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:38,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 2613 transitions. [2021-07-13 20:17:38,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-13 20:17:38,633 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:38,633 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:38,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-07-13 20:17:38,834 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:38,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:38,834 INFO L82 PathProgramCache]: Analyzing trace with hash 400872299, now seen corresponding path program 214 times [2021-07-13 20:17:38,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:38,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182905608] [2021-07-13 20:17:38,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:38,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:39,201 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:39,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:39,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182905608] [2021-07-13 20:17:39,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182905608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:39,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057432033] [2021-07-13 20:17:39,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:39,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:17:39,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:39,230 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 81 conjunts are in the unsatisfiable core [2021-07-13 20:17:39,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:39,878 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:39,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057432033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:39,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:39,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-07-13 20:17:39,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743955508] [2021-07-13 20:17:39,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-13 20:17:39,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:39,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-13 20:17:39,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2261, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:17:39,879 INFO L87 Difference]: Start difference. First operand 1167 states and 2613 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:44,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:44,314 INFO L93 Difference]: Finished difference Result 1940 states and 4087 transitions. [2021-07-13 20:17:44,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-07-13 20:17:44,314 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-07-13 20:17:44,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:44,316 INFO L225 Difference]: With dead ends: 1940 [2021-07-13 20:17:44,316 INFO L226 Difference]: Without dead ends: 1902 [2021-07-13 20:17:44,318 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8042 ImplicationChecksByTransitivity, 4004.2ms TimeCoverageRelationStatistics Valid=2978, Invalid=22462, Unknown=0, NotChecked=0, Total=25440 [2021-07-13 20:17:44,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1902 states. [2021-07-13 20:17:44,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1902 to 1169. [2021-07-13 20:17:44,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1169 states, 1168 states have (on average 2.2405821917808217) internal successors, (2617), 1168 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:44,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 2617 transitions. [2021-07-13 20:17:44,330 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 2617 transitions. Word has length 51 [2021-07-13 20:17:44,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:44,330 INFO L482 AbstractCegarLoop]: Abstraction has 1169 states and 2617 transitions. [2021-07-13 20:17:44,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:44,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 2617 transitions. [2021-07-13 20:17:44,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-13 20:17:44,331 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:44,331 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:44,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:44,532 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:44,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:44,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1233296815, now seen corresponding path program 215 times [2021-07-13 20:17:44,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:44,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383003270] [2021-07-13 20:17:44,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:44,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:44,931 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:44,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:44,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383003270] [2021-07-13 20:17:44,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383003270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:44,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708858533] [2021-07-13 20:17:44,931 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:44,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 20:17:44,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:44,962 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 81 conjunts are in the unsatisfiable core [2021-07-13 20:17:44,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:45,607 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:45,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708858533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:45,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:45,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-07-13 20:17:45,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50024849] [2021-07-13 20:17:45,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-13 20:17:45,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:45,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-13 20:17:45,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=2242, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:17:45,608 INFO L87 Difference]: Start difference. First operand 1169 states and 2617 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-07-13 20:17:46,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:17:46,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:46,636 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 20:17:46,638 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 20:17:46,639 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 20:17:46,639 INFO L202 PluginConnector]: Adding new model nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 08:17:46 BasicIcfg [2021-07-13 20:17:46,639 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 20:17:46,639 INFO L168 Benchmark]: Toolchain (without parser) took 766835.28 ms. Allocated memory was 182.5 MB in the beginning and 791.7 MB in the end (delta: 609.2 MB). Free memory was 162.1 MB in the beginning and 417.7 MB in the end (delta: -255.7 MB). Peak memory consumption was 354.8 MB. Max. memory is 8.0 GB. [2021-07-13 20:17:46,640 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 182.5 MB. Free memory is still 163.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:17:46,640 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.90 ms. Allocated memory is still 182.5 MB. Free memory was 161.8 MB in the beginning and 160.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:17:46,640 INFO L168 Benchmark]: Boogie Preprocessor took 11.38 ms. Allocated memory is still 182.5 MB. Free memory was 160.4 MB in the beginning and 159.6 MB in the end (delta: 840.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:17:46,640 INFO L168 Benchmark]: RCFGBuilder took 291.64 ms. Allocated memory is still 182.5 MB. Free memory was 159.4 MB in the beginning and 148.4 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-07-13 20:17:46,640 INFO L168 Benchmark]: TraceAbstraction took 766509.57 ms. Allocated memory was 182.5 MB in the beginning and 791.7 MB in the end (delta: 609.2 MB). Free memory was 147.9 MB in the beginning and 417.7 MB in the end (delta: -269.8 MB). Peak memory consumption was 340.1 MB. Max. memory is 8.0 GB. [2021-07-13 20:17:46,640 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 182.5 MB. Free memory is still 163.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 18.90 ms. Allocated memory is still 182.5 MB. Free memory was 161.8 MB in the beginning and 160.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 11.38 ms. Allocated memory is still 182.5 MB. Free memory was 160.4 MB in the beginning and 159.6 MB in the end (delta: 840.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 291.64 ms. Allocated memory is still 182.5 MB. Free memory was 159.4 MB in the beginning and 148.4 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 766509.57 ms. Allocated memory was 182.5 MB in the beginning and 791.7 MB in the end (delta: 609.2 MB). Free memory was 147.9 MB in the beginning and 417.7 MB in the end (delta: -269.8 MB). Peak memory consumption was 340.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1169states) and FLOYD_HOARE automaton (currently 41 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 77 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 766374.8ms, OverallIterations: 217, TraceHistogramMax: 9, EmptinessCheckTime: 136.0ms, AutomataDifference: 569601.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 29.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 10039 SDtfs, 59982 SDslu, 158623 SDs, 0 SdLazy, 369083 SolverSat, 17520 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 119329.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25266 GetRequests, 4249 SyntacticMatches, 260 SemanticMatches, 20756 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847733 ImplicationChecksByTransitivity, 534960.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1169occurred in iteration=216, InterpolantAutomatonStates: 16774, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1390.0ms AutomataMinimizationTime, 216 MinimizatonAttempts, 75596 StatesRemovedByMinimization, 216 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 588.8ms SsaConstructionTime, 2802.2ms SatisfiabilityAnalysisTime, 143641.2ms InterpolantComputationTime, 15786 NumberOfCodeBlocks, 15786 NumberOfCodeBlocksAsserted, 1089 NumberOfCheckSat, 15354 ConstructedInterpolants, 0 QuantifiedInterpolants, 229088 SizeOfPredicates, 1045 NumberOfNonLiveVariables, 17650 ConjunctsInSsa, 10916 ConjunctsInUnsatCore, 432 InterpolantComputations, 2 PerfectInterpolantSequences, 4415/29861 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown