/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-22 02:52:54,621 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 02:52:54,624 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 02:52:54,670 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-22 02:52:54,716 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-Separate.epf [2021-05-22 02:52:54,734 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 02:52:54,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 02:52:54,735 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 02:52:54,735 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 02:52:54,736 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 02:52:54,736 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 02:52:54,736 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 02:52:54,736 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 02:52:54,737 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 02:52:54,737 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 02:52:54,737 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 02:52:54,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 02:52:54,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 02:52:54,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 02:52:54,738 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 02:52:54,738 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 02:52:54,738 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 02:52:54,738 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 02:52:54,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 02:52:54,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 02:52:54,739 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 02:52:54,739 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 02:52:54,739 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 02:52:54,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:52:54,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 02:52:54,740 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 02:52:54,740 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 02:52:54,740 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 02:52:54,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 02:52:54,740 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 02:52:54,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 02:52:54,741 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 02:52:54,741 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 02:52:55,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 02:52:55,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 02:52:55,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 02:52:55,041 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 02:52:55,042 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 02:52:55,043 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl [2021-05-22 02:52:55,095 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl' [2021-05-22 02:52:55,365 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 02:52:55,366 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 02:52:55,369 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 02:52:55,369 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 02:52:55,370 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 02:52:55,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:52:55" (1/1) ... [2021-05-22 02:52:55,387 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:52:55" (1/1) ... [2021-05-22 02:52:55,392 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 02:52:55,394 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 02:52:55,394 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 02:52:55,394 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 02:52:55,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:52:55" (1/1) ... [2021-05-22 02:52:55,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:52:55" (1/1) ... [2021-05-22 02:52:55,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:52:55" (1/1) ... [2021-05-22 02:52:55,401 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:52:55" (1/1) ... [2021-05-22 02:52:55,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:52:55" (1/1) ... [2021-05-22 02:52:55,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:52:55" (1/1) ... [2021-05-22 02:52:55,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:52:55" (1/1) ... [2021-05-22 02:52:55,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 02:52:55,411 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 02:52:55,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 02:52:55,411 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 02:52:55,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:52:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:52:55,470 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-22 02:52:55,470 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-22 02:52:55,470 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-22 02:52:55,471 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-22 02:52:55,471 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-22 02:52:55,471 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-22 02:52:55,471 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-22 02:52:55,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 02:52:55,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 02:52:55,472 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-22 02:52:55,618 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 02:52:55,619 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-22 02:52:55,620 INFO L202 PluginConnector]: Adding new model nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:52:55 BoogieIcfgContainer [2021-05-22 02:52:55,621 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 02:52:55,622 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 02:52:55,622 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 02:52:55,625 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 02:52:55,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:52:55" (1/2) ... [2021-05-22 02:52:55,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c69e1a and model type nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 02:52:55, skipping insertion in model container [2021-05-22 02:52:55,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:52:55" (2/2) ... [2021-05-22 02:52:55,631 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-counter-alt2.wvr.bpl [2021-05-22 02:52:55,640 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 02:52:55,641 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 02:52:55,641 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 02:52:55,643 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 02:52:55,679 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-05-22 02:52:55,694 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 02:52:55,710 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:52:55,710 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:52:55,710 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:52:55,710 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:52:55,710 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:52:55,710 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:52:55,711 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:52:55,711 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 02:52:55,718 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-05-22 02:52:55,726 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:55,744 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:55,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:52:55,749 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:55,750 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:55,750 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:55,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:55,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1715863245, now seen corresponding path program 1 times [2021-05-22 02:52:55,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:55,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201382160] [2021-05-22 02:52:55,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:55,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:55,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:55,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:55,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201382160] [2021-05-22 02:52:55,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201382160] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:52:55,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:52:55,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:52:55,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891466947] [2021-05-22 02:52:55,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:52:55,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:55,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:52:55,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:52:55,951 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 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), 4 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) [2021-05-22 02:52:55,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:55,984 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2021-05-22 02:52:55,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:52:55,986 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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 [2021-05-22 02:52:55,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:55,992 INFO L225 Difference]: With dead ends: 43 [2021-05-22 02:52:55,993 INFO L226 Difference]: Without dead ends: 43 [2021-05-22 02:52:55,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:52:56,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-22 02:52:56,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-05-22 02:52:56,028 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) [2021-05-22 02:52:56,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2021-05-22 02:52:56,030 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2021-05-22 02:52:56,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:56,030 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2021-05-22 02:52:56,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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) [2021-05-22 02:52:56,030 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2021-05-22 02:52:56,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:52:56,031 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:56,031 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:56,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-22 02:52:56,031 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:56,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:56,032 INFO L82 PathProgramCache]: Analyzing trace with hash -599854287, now seen corresponding path program 1 times [2021-05-22 02:52:56,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:56,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356269039] [2021-05-22 02:52:56,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:56,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:52:56,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:56,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356269039] [2021-05-22 02:52:56,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356269039] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:52:56,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:52:56,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:52:56,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569665741] [2021-05-22 02:52:56,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:52:56,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:56,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:52:56,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:52:56,104 INFO L87 Difference]: Start difference. First operand 38 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.4) 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) [2021-05-22 02:52:56,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:56,149 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2021-05-22 02:52:56,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:52:56,150 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) 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 [2021-05-22 02:52:56,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:56,152 INFO L225 Difference]: With dead ends: 50 [2021-05-22 02:52:56,152 INFO L226 Difference]: Without dead ends: 50 [2021-05-22 02:52:56,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:52:56,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-22 02:52:56,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-05-22 02:52:56,159 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) [2021-05-22 02:52:56,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2021-05-22 02:52:56,161 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2021-05-22 02:52:56,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:56,161 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2021-05-22 02:52:56,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) 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) [2021-05-22 02:52:56,161 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2021-05-22 02:52:56,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:52:56,162 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:56,162 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:56,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-22 02:52:56,163 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:56,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:56,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1329802641, now seen corresponding path program 1 times [2021-05-22 02:52:56,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:56,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463692181] [2021-05-22 02:52:56,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:56,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:56,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:56,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:56,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463692181] [2021-05-22 02:52:56,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463692181] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:56,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583451770] [2021-05-22 02:52:56,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:56,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:52:56,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:56,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:56,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583451770] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:56,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:56,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-22 02:52:56,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103217972] [2021-05-22 02:52:56,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:52:56,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:56,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:52:56,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:52:56,782 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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) [2021-05-22 02:52:56,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:56,933 INFO L93 Difference]: Finished difference Result 144 states and 274 transitions. [2021-05-22 02:52:56,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:52:56,934 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 19 [2021-05-22 02:52:56,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:56,942 INFO L225 Difference]: With dead ends: 144 [2021-05-22 02:52:56,942 INFO L226 Difference]: Without dead ends: 113 [2021-05-22 02:52:56,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 186.3ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:52:56,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-22 02:52:56,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 55. [2021-05-22 02:52:56,953 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) [2021-05-22 02:52:56,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 103 transitions. [2021-05-22 02:52:56,954 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 103 transitions. Word has length 19 [2021-05-22 02:52:56,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:56,954 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 103 transitions. [2021-05-22 02:52:56,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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) [2021-05-22 02:52:56,955 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 103 transitions. [2021-05-22 02:52:56,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:52:56,955 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:56,956 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:57,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-22 02:52:57,178 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:57,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:57,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1564465709, now seen corresponding path program 2 times [2021-05-22 02:52:57,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:57,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034642160] [2021-05-22 02:52:57,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:57,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:57,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:57,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:57,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034642160] [2021-05-22 02:52:57,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034642160] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:57,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67359259] [2021-05-22 02:52:57,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:57,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:52:57,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:57,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:52:57,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:57,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:57,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67359259] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:57,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:57,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-05-22 02:52:57,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772554500] [2021-05-22 02:52:57,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:52:57,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:57,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:52:57,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:52:57,464 INFO L87 Difference]: Start difference. First operand 55 states and 103 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:57,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:57,812 INFO L93 Difference]: Finished difference Result 167 states and 307 transitions. [2021-05-22 02:52:57,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:52:57,813 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:52:57,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:57,818 INFO L225 Difference]: With dead ends: 167 [2021-05-22 02:52:57,818 INFO L226 Difference]: Without dead ends: 167 [2021-05-22 02:52:57,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 296.8ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:52:57,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-05-22 02:52:57,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 75. [2021-05-22 02:52:57,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 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) [2021-05-22 02:52:57,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 149 transitions. [2021-05-22 02:52:57,828 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 149 transitions. Word has length 21 [2021-05-22 02:52:57,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:57,831 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 149 transitions. [2021-05-22 02:52:57,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:57,832 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 149 transitions. [2021-05-22 02:52:57,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-22 02:52:57,833 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:57,833 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:58,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:58,056 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:58,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:58,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1814278047, now seen corresponding path program 3 times [2021-05-22 02:52:58,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:58,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628249442] [2021-05-22 02:52:58,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:58,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:58,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:58,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:58,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628249442] [2021-05-22 02:52:58,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628249442] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:58,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238053878] [2021-05-22 02:52:58,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:58,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:52:58,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:58,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:52:58,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:58,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:58,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238053878] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:58,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:58,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-05-22 02:52:58,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541676498] [2021-05-22 02:52:58,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-22 02:52:58,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:58,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-22 02:52:58,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:52:58,306 INFO L87 Difference]: Start difference. First operand 75 states and 149 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:58,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:58,584 INFO L93 Difference]: Finished difference Result 141 states and 267 transitions. [2021-05-22 02:52:58,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:52:58,585 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-22 02:52:58,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:58,586 INFO L225 Difference]: With dead ends: 141 [2021-05-22 02:52:58,586 INFO L226 Difference]: Without dead ends: 139 [2021-05-22 02:52:58,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 265.9ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:52:58,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-22 02:52:58,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 77. [2021-05-22 02:52:58,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.986842105263158) internal successors, (151), 76 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:58,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 151 transitions. [2021-05-22 02:52:58,594 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 151 transitions. Word has length 21 [2021-05-22 02:52:58,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:58,594 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 151 transitions. [2021-05-22 02:52:58,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:58,594 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 151 transitions. [2021-05-22 02:52:58,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-22 02:52:58,595 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:58,595 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:52:58,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-22 02:52:58,796 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:52:58,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:52:58,796 INFO L82 PathProgramCache]: Analyzing trace with hash -709724757, now seen corresponding path program 4 times [2021-05-22 02:52:58,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:52:58,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7293713] [2021-05-22 02:52:58,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:52:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:52:58,959 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:58,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:52:58,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7293713] [2021-05-22 02:52:58,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7293713] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:58,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223135323] [2021-05-22 02:52:58,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:52:58,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:52:58,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:52:58,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-22 02:52:58,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:52:59,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:52:59,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223135323] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:52:59,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:52:59,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-05-22 02:52:59,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049941493] [2021-05-22 02:52:59,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:52:59,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:52:59,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:52:59,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:52:59,330 INFO L87 Difference]: Start difference. First operand 77 states and 151 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:59,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:52:59,920 INFO L93 Difference]: Finished difference Result 350 states and 689 transitions. [2021-05-22 02:52:59,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:52:59,921 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-22 02:52:59,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:52:59,923 INFO L225 Difference]: With dead ends: 350 [2021-05-22 02:52:59,923 INFO L226 Difference]: Without dead ends: 293 [2021-05-22 02:52:59,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 600.2ms TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:52:59,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-05-22 02:52:59,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 93. [2021-05-22 02:52:59,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.010869565217391) internal successors, (185), 92 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) [2021-05-22 02:52:59,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 185 transitions. [2021-05-22 02:52:59,933 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 185 transitions. Word has length 23 [2021-05-22 02:52:59,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:52:59,934 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 185 transitions. [2021-05-22 02:52:59,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:52:59,934 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 185 transitions. [2021-05-22 02:52:59,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-22 02:52:59,935 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:52:59,935 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:00,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:00,149 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:00,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:00,149 INFO L82 PathProgramCache]: Analyzing trace with hash -923989763, now seen corresponding path program 5 times [2021-05-22 02:53:00,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:00,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062381443] [2021-05-22 02:53:00,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:00,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:00,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:00,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:00,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062381443] [2021-05-22 02:53:00,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062381443] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:00,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544407947] [2021-05-22 02:53:00,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:00,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:53:00,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:00,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-22 02:53:00,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:00,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:00,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544407947] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:00,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:00,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-05-22 02:53:00,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424604889] [2021-05-22 02:53:00,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:53:00,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:00,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:53:00,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:53:00,699 INFO L87 Difference]: Start difference. First operand 93 states and 185 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:01,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:01,395 INFO L93 Difference]: Finished difference Result 326 states and 652 transitions. [2021-05-22 02:53:01,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:53:01,396 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-22 02:53:01,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:01,397 INFO L225 Difference]: With dead ends: 326 [2021-05-22 02:53:01,397 INFO L226 Difference]: Without dead ends: 286 [2021-05-22 02:53:01,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 691.2ms TimeCoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:53:01,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-05-22 02:53:01,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 120. [2021-05-22 02:53:01,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0672268907563027) internal successors, (246), 119 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:01,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 246 transitions. [2021-05-22 02:53:01,406 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 246 transitions. Word has length 23 [2021-05-22 02:53:01,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:01,406 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 246 transitions. [2021-05-22 02:53:01,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:01,407 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 246 transitions. [2021-05-22 02:53:01,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-22 02:53:01,408 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:01,408 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:01,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-22 02:53:01,629 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:01,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:01,629 INFO L82 PathProgramCache]: Analyzing trace with hash 656818999, now seen corresponding path program 6 times [2021-05-22 02:53:01,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:01,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398787554] [2021-05-22 02:53:01,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:01,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:01,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398787554] [2021-05-22 02:53:01,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398787554] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:01,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561442501] [2021-05-22 02:53:01,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:01,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:53:01,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:01,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-22 02:53:01,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:02,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:02,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561442501] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:02,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:02,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-05-22 02:53:02,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166432639] [2021-05-22 02:53:02,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:53:02,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:02,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:53:02,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:53:02,117 INFO L87 Difference]: Start difference. First operand 120 states and 246 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:03,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:03,180 INFO L93 Difference]: Finished difference Result 387 states and 768 transitions. [2021-05-22 02:53:03,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-22 02:53:03,180 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-22 02:53:03,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:03,182 INFO L225 Difference]: With dead ends: 387 [2021-05-22 02:53:03,182 INFO L226 Difference]: Without dead ends: 341 [2021-05-22 02:53:03,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1072.4ms TimeCoverageRelationStatistics Valid=361, Invalid=1619, Unknown=0, NotChecked=0, Total=1980 [2021-05-22 02:53:03,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-05-22 02:53:03,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 124. [2021-05-22 02:53:03,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.073170731707317) internal successors, (255), 123 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:03,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 255 transitions. [2021-05-22 02:53:03,190 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 255 transitions. Word has length 23 [2021-05-22 02:53:03,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:03,190 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 255 transitions. [2021-05-22 02:53:03,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:03,191 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 255 transitions. [2021-05-22 02:53:03,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-22 02:53:03,191 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:03,191 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:03,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:03,401 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:03,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:03,401 INFO L82 PathProgramCache]: Analyzing trace with hash -73546911, now seen corresponding path program 7 times [2021-05-22 02:53:03,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:03,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537356996] [2021-05-22 02:53:03,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:03,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:03,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:03,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:03,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537356996] [2021-05-22 02:53:03,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537356996] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:03,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024972958] [2021-05-22 02:53:03,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:03,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:03,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-22 02:53:03,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:03,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:53:03,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024972958] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:03,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:03,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-22 02:53:03,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993349964] [2021-05-22 02:53:03,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:53:03,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:03,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:53:03,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:53:03,672 INFO L87 Difference]: Start difference. First operand 124 states and 255 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:04,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:04,157 INFO L93 Difference]: Finished difference Result 302 states and 585 transitions. [2021-05-22 02:53:04,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-22 02:53:04,157 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-22 02:53:04,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:04,159 INFO L225 Difference]: With dead ends: 302 [2021-05-22 02:53:04,159 INFO L226 Difference]: Without dead ends: 294 [2021-05-22 02:53:04,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 427.0ms TimeCoverageRelationStatistics Valid=301, Invalid=1031, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:53:04,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-05-22 02:53:04,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 161. [2021-05-22 02:53:04,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.2) internal successors, (352), 160 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:04,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 352 transitions. [2021-05-22 02:53:04,167 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 352 transitions. Word has length 23 [2021-05-22 02:53:04,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:04,167 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 352 transitions. [2021-05-22 02:53:04,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:04,168 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 352 transitions. [2021-05-22 02:53:04,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:53:04,169 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:04,169 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:04,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-22 02:53:04,385 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:04,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:04,385 INFO L82 PathProgramCache]: Analyzing trace with hash -170955159, now seen corresponding path program 8 times [2021-05-22 02:53:04,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:04,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016683058] [2021-05-22 02:53:04,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:04,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:04,451 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:04,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:04,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016683058] [2021-05-22 02:53:04,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016683058] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:04,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177398369] [2021-05-22 02:53:04,451 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 [2021-05-22 02:53:04,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:53:04,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:04,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:53:04,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:04,648 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:04,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177398369] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:04,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:04,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-05-22 02:53:04,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542678312] [2021-05-22 02:53:04,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:53:04,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:04,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:53:04,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:53:04,651 INFO L87 Difference]: Start difference. First operand 161 states and 352 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:05,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:05,078 INFO L93 Difference]: Finished difference Result 404 states and 806 transitions. [2021-05-22 02:53:05,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-22 02:53:05,078 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:53:05,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:05,080 INFO L225 Difference]: With dead ends: 404 [2021-05-22 02:53:05,080 INFO L226 Difference]: Without dead ends: 404 [2021-05-22 02:53:05,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 382.1ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-05-22 02:53:05,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-05-22 02:53:05,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 175. [2021-05-22 02:53:05,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.2011494252873565) internal successors, (383), 174 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:05,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 383 transitions. [2021-05-22 02:53:05,088 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 383 transitions. Word has length 25 [2021-05-22 02:53:05,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:05,088 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 383 transitions. [2021-05-22 02:53:05,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:05,088 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 383 transitions. [2021-05-22 02:53:05,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:53:05,089 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:05,089 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:05,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-22 02:53:05,290 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:05,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:05,291 INFO L82 PathProgramCache]: Analyzing trace with hash 465222687, now seen corresponding path program 9 times [2021-05-22 02:53:05,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:05,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133462306] [2021-05-22 02:53:05,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:05,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:05,338 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:05,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:05,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133462306] [2021-05-22 02:53:05,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133462306] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:05,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879202196] [2021-05-22 02:53:05,339 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:05,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-22 02:53:05,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:05,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-22 02:53:05,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:05,511 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:05,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879202196] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:05,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:05,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-05-22 02:53:05,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454941969] [2021-05-22 02:53:05,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:53:05,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:05,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:53:05,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:53:05,513 INFO L87 Difference]: Start difference. First operand 175 states and 383 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:06,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:06,031 INFO L93 Difference]: Finished difference Result 308 states and 630 transitions. [2021-05-22 02:53:06,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-22 02:53:06,032 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:53:06,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:06,033 INFO L225 Difference]: With dead ends: 308 [2021-05-22 02:53:06,033 INFO L226 Difference]: Without dead ends: 306 [2021-05-22 02:53:06,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 482.0ms TimeCoverageRelationStatistics Valid=493, Invalid=1399, Unknown=0, NotChecked=0, Total=1892 [2021-05-22 02:53:06,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-05-22 02:53:06,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 175. [2021-05-22 02:53:06,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1954022988505746) internal successors, (382), 174 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:06,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 382 transitions. [2021-05-22 02:53:06,040 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 382 transitions. Word has length 25 [2021-05-22 02:53:06,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:06,040 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 382 transitions. [2021-05-22 02:53:06,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:06,040 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 382 transitions. [2021-05-22 02:53:06,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:53:06,041 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:06,042 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:06,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:06,257 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:06,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:06,257 INFO L82 PathProgramCache]: Analyzing trace with hash -2001868057, now seen corresponding path program 10 times [2021-05-22 02:53:06,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:06,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773010258] [2021-05-22 02:53:06,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:06,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:06,443 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:06,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:06,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773010258] [2021-05-22 02:53:06,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773010258] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:06,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082299126] [2021-05-22 02:53:06,443 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 [2021-05-22 02:53:06,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:53:06,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:06,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-22 02:53:06,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:06,892 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:06,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082299126] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:06,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:06,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-05-22 02:53:06,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420412779] [2021-05-22 02:53:06,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:53:06,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:06,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:53:06,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:53:06,894 INFO L87 Difference]: Start difference. First operand 175 states and 382 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:07,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:07,669 INFO L93 Difference]: Finished difference Result 609 states and 1253 transitions. [2021-05-22 02:53:07,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-22 02:53:07,670 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:53:07,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:07,672 INFO L225 Difference]: With dead ends: 609 [2021-05-22 02:53:07,672 INFO L226 Difference]: Without dead ends: 543 [2021-05-22 02:53:07,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 869.7ms TimeCoverageRelationStatistics Valid=364, Invalid=1892, Unknown=0, NotChecked=0, Total=2256 [2021-05-22 02:53:07,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-05-22 02:53:07,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 229. [2021-05-22 02:53:07,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.219298245614035) internal successors, (506), 228 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:07,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 506 transitions. [2021-05-22 02:53:07,688 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 506 transitions. Word has length 27 [2021-05-22 02:53:07,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:07,688 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 506 transitions. [2021-05-22 02:53:07,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:07,689 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 506 transitions. [2021-05-22 02:53:07,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:53:07,690 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:07,690 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:07,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-22 02:53:07,905 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:07,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:07,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1752108615, now seen corresponding path program 11 times [2021-05-22 02:53:07,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:07,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757077153] [2021-05-22 02:53:07,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:08,125 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:08,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:08,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757077153] [2021-05-22 02:53:08,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757077153] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:08,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093077857] [2021-05-22 02:53:08,126 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 [2021-05-22 02:53:08,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:53:08,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:08,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-22 02:53:08,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:08,537 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:08,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093077857] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:08,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:08,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-05-22 02:53:08,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223270938] [2021-05-22 02:53:08,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:53:08,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:08,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:53:08,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:53:08,539 INFO L87 Difference]: Start difference. First operand 229 states and 506 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:09,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:09,497 INFO L93 Difference]: Finished difference Result 588 states and 1219 transitions. [2021-05-22 02:53:09,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-22 02:53:09,497 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:53:09,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:09,499 INFO L225 Difference]: With dead ends: 588 [2021-05-22 02:53:09,499 INFO L226 Difference]: Without dead ends: 534 [2021-05-22 02:53:09,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 956.5ms TimeCoverageRelationStatistics Valid=348, Invalid=1908, Unknown=0, NotChecked=0, Total=2256 [2021-05-22 02:53:09,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-05-22 02:53:09,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 248. [2021-05-22 02:53:09,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.210526315789474) internal successors, (546), 247 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:09,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 546 transitions. [2021-05-22 02:53:09,508 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 546 transitions. Word has length 27 [2021-05-22 02:53:09,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:09,508 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 546 transitions. [2021-05-22 02:53:09,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:09,508 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 546 transitions. [2021-05-22 02:53:09,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:53:09,509 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:09,509 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:09,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-05-22 02:53:09,731 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:09,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:09,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1644513465, now seen corresponding path program 12 times [2021-05-22 02:53:09,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:09,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977713216] [2021-05-22 02:53:09,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:09,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:09,898 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:09,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:09,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977713216] [2021-05-22 02:53:09,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977713216] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:09,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933895462] [2021-05-22 02:53:09,899 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 [2021-05-22 02:53:09,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:53:09,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:09,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-22 02:53:09,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:10,310 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:10,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933895462] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:10,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:10,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-05-22 02:53:10,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883278087] [2021-05-22 02:53:10,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:53:10,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:10,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:53:10,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:53:10,312 INFO L87 Difference]: Start difference. First operand 248 states and 546 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:11,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:11,293 INFO L93 Difference]: Finished difference Result 592 states and 1236 transitions. [2021-05-22 02:53:11,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-22 02:53:11,294 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:53:11,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:11,296 INFO L225 Difference]: With dead ends: 592 [2021-05-22 02:53:11,296 INFO L226 Difference]: Without dead ends: 559 [2021-05-22 02:53:11,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 961.9ms TimeCoverageRelationStatistics Valid=425, Invalid=2125, Unknown=0, NotChecked=0, Total=2550 [2021-05-22 02:53:11,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-05-22 02:53:11,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 272. [2021-05-22 02:53:11,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.206642066420664) internal successors, (598), 271 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:11,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 598 transitions. [2021-05-22 02:53:11,305 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 598 transitions. Word has length 27 [2021-05-22 02:53:11,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:11,305 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 598 transitions. [2021-05-22 02:53:11,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:11,305 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 598 transitions. [2021-05-22 02:53:11,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:53:11,306 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:11,306 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:11,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:11,507 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:11,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:11,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1281656179, now seen corresponding path program 13 times [2021-05-22 02:53:11,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:11,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130437224] [2021-05-22 02:53:11,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:11,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:11,725 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:11,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:11,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130437224] [2021-05-22 02:53:11,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130437224] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:11,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329833919] [2021-05-22 02:53:11,725 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:11,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:11,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-22 02:53:11,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:12,155 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:12,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329833919] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:12,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:12,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-05-22 02:53:12,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946382811] [2021-05-22 02:53:12,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:53:12,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:12,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:53:12,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:53:12,156 INFO L87 Difference]: Start difference. First operand 272 states and 598 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:13,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:13,510 INFO L93 Difference]: Finished difference Result 679 states and 1420 transitions. [2021-05-22 02:53:13,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-22 02:53:13,511 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:53:13,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:13,513 INFO L225 Difference]: With dead ends: 679 [2021-05-22 02:53:13,513 INFO L226 Difference]: Without dead ends: 616 [2021-05-22 02:53:13,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 1381.5ms TimeCoverageRelationStatistics Valid=435, Invalid=2427, Unknown=0, NotChecked=0, Total=2862 [2021-05-22 02:53:13,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-05-22 02:53:13,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 280. [2021-05-22 02:53:13,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.2007168458781363) internal successors, (614), 279 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:13,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 614 transitions. [2021-05-22 02:53:13,523 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 614 transitions. Word has length 27 [2021-05-22 02:53:13,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:13,523 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 614 transitions. [2021-05-22 02:53:13,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:13,523 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 614 transitions. [2021-05-22 02:53:13,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:53:13,524 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:13,524 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:13,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-05-22 02:53:13,751 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:13,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:13,751 INFO L82 PathProgramCache]: Analyzing trace with hash 383310963, now seen corresponding path program 14 times [2021-05-22 02:53:13,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:13,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251177453] [2021-05-22 02:53:13,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:13,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:13,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:13,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251177453] [2021-05-22 02:53:13,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251177453] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:13,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252969767] [2021-05-22 02:53:13,933 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 [2021-05-22 02:53:13,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:53:13,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:13,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-22 02:53:13,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:14,346 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:14,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252969767] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:14,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:14,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-05-22 02:53:14,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605994830] [2021-05-22 02:53:14,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:53:14,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:14,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:53:14,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:53:14,348 INFO L87 Difference]: Start difference. First operand 280 states and 614 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:16,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:16,018 INFO L93 Difference]: Finished difference Result 744 states and 1546 transitions. [2021-05-22 02:53:16,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-22 02:53:16,018 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:53:16,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:16,021 INFO L225 Difference]: With dead ends: 744 [2021-05-22 02:53:16,021 INFO L226 Difference]: Without dead ends: 704 [2021-05-22 02:53:16,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 1583.1ms TimeCoverageRelationStatistics Valid=710, Invalid=3322, Unknown=0, NotChecked=0, Total=4032 [2021-05-22 02:53:16,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-05-22 02:53:16,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 291. [2021-05-22 02:53:16,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.2103448275862068) internal successors, (641), 290 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:16,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 641 transitions. [2021-05-22 02:53:16,032 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 641 transitions. Word has length 27 [2021-05-22 02:53:16,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:16,032 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 641 transitions. [2021-05-22 02:53:16,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:16,032 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 641 transitions. [2021-05-22 02:53:16,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:53:16,033 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:16,033 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:16,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:16,253 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:16,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:16,253 INFO L82 PathProgramCache]: Analyzing trace with hash 113919671, now seen corresponding path program 15 times [2021-05-22 02:53:16,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:16,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445392447] [2021-05-22 02:53:16,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:16,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:16,386 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:16,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:16,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445392447] [2021-05-22 02:53:16,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445392447] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:16,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45322666] [2021-05-22 02:53:16,387 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 [2021-05-22 02:53:16,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:53:16,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:16,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-22 02:53:16,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:16,686 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:16,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45322666] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:16,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:16,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-05-22 02:53:16,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671826431] [2021-05-22 02:53:16,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:53:16,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:16,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:53:16,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:53:16,688 INFO L87 Difference]: Start difference. First operand 291 states and 641 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:17,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:17,475 INFO L93 Difference]: Finished difference Result 662 states and 1432 transitions. [2021-05-22 02:53:17,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-22 02:53:17,475 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:53:17,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:17,477 INFO L225 Difference]: With dead ends: 662 [2021-05-22 02:53:17,477 INFO L226 Difference]: Without dead ends: 662 [2021-05-22 02:53:17,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 837.8ms TimeCoverageRelationStatistics Valid=438, Invalid=1632, Unknown=0, NotChecked=0, Total=2070 [2021-05-22 02:53:17,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-05-22 02:53:17,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 340. [2021-05-22 02:53:17,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.2359882005899707) internal successors, (758), 339 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:17,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 758 transitions. [2021-05-22 02:53:17,486 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 758 transitions. Word has length 27 [2021-05-22 02:53:17,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:17,486 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 758 transitions. [2021-05-22 02:53:17,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:17,486 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 758 transitions. [2021-05-22 02:53:17,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:53:17,487 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:17,487 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:17,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:17,701 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:17,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:17,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1553365309, now seen corresponding path program 16 times [2021-05-22 02:53:17,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:17,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88097473] [2021-05-22 02:53:17,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:17,895 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:17,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:17,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88097473] [2021-05-22 02:53:17,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88097473] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:17,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519785190] [2021-05-22 02:53:17,896 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 [2021-05-22 02:53:17,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:53:17,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:17,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-22 02:53:17,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:18,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519785190] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:18,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:18,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-05-22 02:53:18,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533036884] [2021-05-22 02:53:18,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:53:18,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:18,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:53:18,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:53:18,340 INFO L87 Difference]: Start difference. First operand 340 states and 758 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:20,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:20,303 INFO L93 Difference]: Finished difference Result 1105 states and 2323 transitions. [2021-05-22 02:53:20,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-22 02:53:20,303 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:53:20,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:20,307 INFO L225 Difference]: With dead ends: 1105 [2021-05-22 02:53:20,307 INFO L226 Difference]: Without dead ends: 1038 [2021-05-22 02:53:20,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1695 ImplicationChecksByTransitivity, 1776.9ms TimeCoverageRelationStatistics Valid=688, Invalid=4424, Unknown=0, NotChecked=0, Total=5112 [2021-05-22 02:53:20,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-05-22 02:53:20,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 406. [2021-05-22 02:53:20,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.3061728395061727) internal successors, (934), 405 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:20,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 934 transitions. [2021-05-22 02:53:20,320 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 934 transitions. Word has length 27 [2021-05-22 02:53:20,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:20,321 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 934 transitions. [2021-05-22 02:53:20,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:20,321 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 934 transitions. [2021-05-22 02:53:20,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:53:20,322 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:20,322 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:20,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:20,545 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:20,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:20,546 INFO L82 PathProgramCache]: Analyzing trace with hash -525801667, now seen corresponding path program 17 times [2021-05-22 02:53:20,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:20,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161410699] [2021-05-22 02:53:20,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:20,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:20,657 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:20,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:20,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161410699] [2021-05-22 02:53:20,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161410699] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:20,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230062969] [2021-05-22 02:53:20,658 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 [2021-05-22 02:53:20,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:53:20,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:20,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-22 02:53:20,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:20,945 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:20,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230062969] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:20,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:20,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-05-22 02:53:20,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752105517] [2021-05-22 02:53:20,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:53:20,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:20,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:53:20,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:53:20,946 INFO L87 Difference]: Start difference. First operand 406 states and 934 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:21,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:21,929 INFO L93 Difference]: Finished difference Result 820 states and 1742 transitions. [2021-05-22 02:53:21,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-22 02:53:21,929 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:53:21,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:21,932 INFO L225 Difference]: With dead ends: 820 [2021-05-22 02:53:21,932 INFO L226 Difference]: Without dead ends: 793 [2021-05-22 02:53:21,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 936.8ms TimeCoverageRelationStatistics Valid=547, Invalid=2003, Unknown=0, NotChecked=0, Total=2550 [2021-05-22 02:53:21,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-05-22 02:53:21,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 370. [2021-05-22 02:53:21,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.2086720867208673) internal successors, (815), 369 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:21,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 815 transitions. [2021-05-22 02:53:21,942 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 815 transitions. Word has length 27 [2021-05-22 02:53:21,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:21,943 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 815 transitions. [2021-05-22 02:53:21,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:21,943 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 815 transitions. [2021-05-22 02:53:21,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-22 02:53:21,944 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:21,944 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:22,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-05-22 02:53:22,167 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:22,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:22,168 INFO L82 PathProgramCache]: Analyzing trace with hash -879273425, now seen corresponding path program 18 times [2021-05-22 02:53:22,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:22,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089651092] [2021-05-22 02:53:22,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:22,227 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:22,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:22,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089651092] [2021-05-22 02:53:22,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089651092] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:22,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431643599] [2021-05-22 02:53:22,228 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 [2021-05-22 02:53:22,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:53:22,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:22,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-22 02:53:22,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:22,457 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:22,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431643599] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:22,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:22,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2021-05-22 02:53:22,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055733200] [2021-05-22 02:53:22,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-22 02:53:22,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:22,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-22 02:53:22,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:53:22,459 INFO L87 Difference]: Start difference. First operand 370 states and 815 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:23,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:23,061 INFO L93 Difference]: Finished difference Result 790 states and 1683 transitions. [2021-05-22 02:53:23,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-22 02:53:23,061 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-22 02:53:23,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:23,063 INFO L225 Difference]: With dead ends: 790 [2021-05-22 02:53:23,063 INFO L226 Difference]: Without dead ends: 786 [2021-05-22 02:53:23,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 590.8ms TimeCoverageRelationStatistics Valid=534, Invalid=1818, Unknown=0, NotChecked=0, Total=2352 [2021-05-22 02:53:23,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-05-22 02:53:23,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 458. [2021-05-22 02:53:23,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 2.2603938730853392) internal successors, (1033), 457 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:23,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1033 transitions. [2021-05-22 02:53:23,074 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1033 transitions. Word has length 27 [2021-05-22 02:53:23,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:23,074 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1033 transitions. [2021-05-22 02:53:23,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:23,074 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1033 transitions. [2021-05-22 02:53:23,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:53:23,075 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:23,075 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:23,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-05-22 02:53:23,293 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:23,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:23,293 INFO L82 PathProgramCache]: Analyzing trace with hash -335260507, now seen corresponding path program 19 times [2021-05-22 02:53:23,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:23,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548658802] [2021-05-22 02:53:23,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:23,375 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:23,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:23,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548658802] [2021-05-22 02:53:23,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548658802] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:23,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892278995] [2021-05-22 02:53:23,375 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 [2021-05-22 02:53:23,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:23,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:53:23,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:23,686 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:23,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892278995] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:23,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:23,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-22 02:53:23,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332129207] [2021-05-22 02:53:23,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-22 02:53:23,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:23,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-22 02:53:23,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:53:23,690 INFO L87 Difference]: Start difference. First operand 458 states and 1033 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:24,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:24,434 INFO L93 Difference]: Finished difference Result 890 states and 1856 transitions. [2021-05-22 02:53:24,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-22 02:53:24,434 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:53:24,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:24,438 INFO L225 Difference]: With dead ends: 890 [2021-05-22 02:53:24,438 INFO L226 Difference]: Without dead ends: 890 [2021-05-22 02:53:24,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 718.3ms TimeCoverageRelationStatistics Valid=775, Invalid=2417, Unknown=0, NotChecked=0, Total=3192 [2021-05-22 02:53:24,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-05-22 02:53:24,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 490. [2021-05-22 02:53:24,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 2.276073619631902) internal successors, (1113), 489 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:24,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1113 transitions. [2021-05-22 02:53:24,448 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1113 transitions. Word has length 29 [2021-05-22 02:53:24,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:24,449 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1113 transitions. [2021-05-22 02:53:24,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:24,449 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1113 transitions. [2021-05-22 02:53:24,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:53:24,450 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:24,450 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:24,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:24,673 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:24,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:24,673 INFO L82 PathProgramCache]: Analyzing trace with hash -2063984225, now seen corresponding path program 20 times [2021-05-22 02:53:24,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:24,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188747963] [2021-05-22 02:53:24,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:24,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:24,729 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:24,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:24,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188747963] [2021-05-22 02:53:24,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188747963] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:24,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248523689] [2021-05-22 02:53:24,730 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 [2021-05-22 02:53:24,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:53:24,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:24,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-22 02:53:24,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:24,950 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:24,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248523689] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:24,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:24,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2021-05-22 02:53:24,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185376674] [2021-05-22 02:53:24,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:53:24,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:24,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:53:24,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:53:24,952 INFO L87 Difference]: Start difference. First operand 490 states and 1113 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:25,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:25,823 INFO L93 Difference]: Finished difference Result 726 states and 1556 transitions. [2021-05-22 02:53:25,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-22 02:53:25,823 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:53:25,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:25,825 INFO L225 Difference]: With dead ends: 726 [2021-05-22 02:53:25,825 INFO L226 Difference]: Without dead ends: 722 [2021-05-22 02:53:25,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 818.6ms TimeCoverageRelationStatistics Valid=1000, Invalid=3032, Unknown=0, NotChecked=0, Total=4032 [2021-05-22 02:53:25,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-05-22 02:53:25,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 458. [2021-05-22 02:53:25,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 2.25382932166302) internal successors, (1030), 457 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:25,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1030 transitions. [2021-05-22 02:53:25,836 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1030 transitions. Word has length 29 [2021-05-22 02:53:25,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:25,836 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1030 transitions. [2021-05-22 02:53:25,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:25,836 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1030 transitions. [2021-05-22 02:53:25,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:53:25,837 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:25,837 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:26,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-05-22 02:53:26,053 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:26,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:26,053 INFO L82 PathProgramCache]: Analyzing trace with hash 2078249141, now seen corresponding path program 21 times [2021-05-22 02:53:26,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:26,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595879053] [2021-05-22 02:53:26,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:26,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:26,220 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:26,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:26,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595879053] [2021-05-22 02:53:26,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595879053] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:26,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434404599] [2021-05-22 02:53:26,221 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 [2021-05-22 02:53:26,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:53:26,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:26,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-22 02:53:26,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:26,579 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:26,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434404599] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:26,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:26,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-05-22 02:53:26,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898736876] [2021-05-22 02:53:26,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-22 02:53:26,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:26,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-22 02:53:26,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:53:26,580 INFO L87 Difference]: Start difference. First operand 458 states and 1030 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:28,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:28,120 INFO L93 Difference]: Finished difference Result 705 states and 1525 transitions. [2021-05-22 02:53:28,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-22 02:53:28,120 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:53:28,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:28,122 INFO L225 Difference]: With dead ends: 705 [2021-05-22 02:53:28,122 INFO L226 Difference]: Without dead ends: 684 [2021-05-22 02:53:28,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1543.4ms TimeCoverageRelationStatistics Valid=434, Invalid=3598, Unknown=0, NotChecked=0, Total=4032 [2021-05-22 02:53:28,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-05-22 02:53:28,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 473. [2021-05-22 02:53:28,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.264830508474576) internal successors, (1069), 472 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:28,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1069 transitions. [2021-05-22 02:53:28,130 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1069 transitions. Word has length 29 [2021-05-22 02:53:28,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:28,131 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1069 transitions. [2021-05-22 02:53:28,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:28,131 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1069 transitions. [2021-05-22 02:53:28,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:53:28,132 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:28,132 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:28,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:28,349 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:28,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:28,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1384293639, now seen corresponding path program 22 times [2021-05-22 02:53:28,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:28,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722058744] [2021-05-22 02:53:28,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:28,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:28,558 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:28,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:28,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722058744] [2021-05-22 02:53:28,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722058744] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:28,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550030270] [2021-05-22 02:53:28,559 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 [2021-05-22 02:53:28,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:53:28,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:28,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-22 02:53:28,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:29,134 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:29,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550030270] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:29,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:29,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-05-22 02:53:29,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718842029] [2021-05-22 02:53:29,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-22 02:53:29,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:29,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-22 02:53:29,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:53:29,136 INFO L87 Difference]: Start difference. First operand 473 states and 1069 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:30,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:30,838 INFO L93 Difference]: Finished difference Result 761 states and 1640 transitions. [2021-05-22 02:53:30,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-22 02:53:30,839 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-22 02:53:30,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:30,841 INFO L225 Difference]: With dead ends: 761 [2021-05-22 02:53:30,841 INFO L226 Difference]: Without dead ends: 749 [2021-05-22 02:53:30,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1722.6ms TimeCoverageRelationStatistics Valid=354, Invalid=3186, Unknown=0, NotChecked=0, Total=3540 [2021-05-22 02:53:30,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-05-22 02:53:30,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 517. [2021-05-22 02:53:30,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 2.294573643410853) internal successors, (1184), 516 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:30,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1184 transitions. [2021-05-22 02:53:30,851 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1184 transitions. Word has length 29 [2021-05-22 02:53:30,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:30,851 INFO L482 AbstractCegarLoop]: Abstraction has 517 states and 1184 transitions. [2021-05-22 02:53:30,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:30,851 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1184 transitions. [2021-05-22 02:53:30,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:53:30,852 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:30,852 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:31,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:31,069 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:31,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:31,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1179903925, now seen corresponding path program 23 times [2021-05-22 02:53:31,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:31,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801655445] [2021-05-22 02:53:31,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:31,257 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:31,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:31,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801655445] [2021-05-22 02:53:31,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801655445] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:31,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089506187] [2021-05-22 02:53:31,258 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 [2021-05-22 02:53:31,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:53:31,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:31,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-22 02:53:31,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:31,678 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:31,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089506187] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:31,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:31,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-05-22 02:53:31,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817688761] [2021-05-22 02:53:31,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:53:31,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:31,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:53:31,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:53:31,680 INFO L87 Difference]: Start difference. First operand 517 states and 1184 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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) [2021-05-22 02:53:33,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:33,284 INFO L93 Difference]: Finished difference Result 1009 states and 2157 transitions. [2021-05-22 02:53:33,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-22 02:53:33,284 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 29 [2021-05-22 02:53:33,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:33,287 INFO L225 Difference]: With dead ends: 1009 [2021-05-22 02:53:33,288 INFO L226 Difference]: Without dead ends: 975 [2021-05-22 02:53:33,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 1501.0ms TimeCoverageRelationStatistics Valid=640, Invalid=3142, Unknown=0, NotChecked=0, Total=3782 [2021-05-22 02:53:33,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-05-22 02:53:33,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 489. [2021-05-22 02:53:33,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.2684426229508197) internal successors, (1107), 488 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:33,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1107 transitions. [2021-05-22 02:53:33,299 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1107 transitions. Word has length 29 [2021-05-22 02:53:33,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:33,299 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1107 transitions. [2021-05-22 02:53:33,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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) [2021-05-22 02:53:33,299 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1107 transitions. [2021-05-22 02:53:33,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-22 02:53:33,300 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:33,300 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:33,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:33,517 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:33,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:33,517 INFO L82 PathProgramCache]: Analyzing trace with hash -985517533, now seen corresponding path program 24 times [2021-05-22 02:53:33,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:33,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264447665] [2021-05-22 02:53:33,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:33,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:33,712 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:33,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:33,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264447665] [2021-05-22 02:53:33,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264447665] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:33,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9541379] [2021-05-22 02:53:33,713 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:33,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:53:33,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:33,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:53:33,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:34,226 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:34,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9541379] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:34,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:34,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-05-22 02:53:34,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408015591] [2021-05-22 02:53:34,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-22 02:53:34,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:34,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-22 02:53:34,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:53:34,230 INFO L87 Difference]: Start difference. First operand 489 states and 1107 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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) [2021-05-22 02:53:35,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:35,398 INFO L93 Difference]: Finished difference Result 1174 states and 2556 transitions. [2021-05-22 02:53:35,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-22 02:53:35,398 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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) Word has length 31 [2021-05-22 02:53:35,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:35,401 INFO L225 Difference]: With dead ends: 1174 [2021-05-22 02:53:35,401 INFO L226 Difference]: Without dead ends: 1105 [2021-05-22 02:53:35,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 1179.1ms TimeCoverageRelationStatistics Valid=495, Invalid=2811, Unknown=0, NotChecked=0, Total=3306 [2021-05-22 02:53:35,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-05-22 02:53:35,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 560. [2021-05-22 02:53:35,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 559 states have (on average 2.2772808586762077) internal successors, (1273), 559 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:35,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 1273 transitions. [2021-05-22 02:53:35,411 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 1273 transitions. Word has length 31 [2021-05-22 02:53:35,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:35,411 INFO L482 AbstractCegarLoop]: Abstraction has 560 states and 1273 transitions. [2021-05-22 02:53:35,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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) [2021-05-22 02:53:35,412 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 1273 transitions. [2021-05-22 02:53:35,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-22 02:53:35,413 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:35,413 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:35,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:35,629 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:35,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:35,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1484862347, now seen corresponding path program 25 times [2021-05-22 02:53:35,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:35,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323128367] [2021-05-22 02:53:35,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:35,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:35,835 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:35,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:35,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323128367] [2021-05-22 02:53:35,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323128367] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:35,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731493979] [2021-05-22 02:53:35,835 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 [2021-05-22 02:53:35,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:35,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-22 02:53:35,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:36,335 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:36,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731493979] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:36,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:36,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-05-22 02:53:36,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971872486] [2021-05-22 02:53:36,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-22 02:53:36,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:36,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-22 02:53:36,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:53:36,337 INFO L87 Difference]: Start difference. First operand 560 states and 1273 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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) [2021-05-22 02:53:37,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:37,449 INFO L93 Difference]: Finished difference Result 1108 states and 2432 transitions. [2021-05-22 02:53:37,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-22 02:53:37,454 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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) Word has length 31 [2021-05-22 02:53:37,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:37,457 INFO L225 Difference]: With dead ends: 1108 [2021-05-22 02:53:37,457 INFO L226 Difference]: Without dead ends: 1051 [2021-05-22 02:53:37,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1181.4ms TimeCoverageRelationStatistics Valid=432, Invalid=2538, Unknown=0, NotChecked=0, Total=2970 [2021-05-22 02:53:37,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-05-22 02:53:37,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 584. [2021-05-22 02:53:37,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 2.2658662092624358) internal successors, (1321), 583 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:37,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1321 transitions. [2021-05-22 02:53:37,469 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1321 transitions. Word has length 31 [2021-05-22 02:53:37,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:37,469 INFO L482 AbstractCegarLoop]: Abstraction has 584 states and 1321 transitions. [2021-05-22 02:53:37,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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) [2021-05-22 02:53:37,469 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1321 transitions. [2021-05-22 02:53:37,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-22 02:53:37,470 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:37,470 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:37,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-05-22 02:53:37,692 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:37,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:37,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1890433653, now seen corresponding path program 26 times [2021-05-22 02:53:37,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:37,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847773994] [2021-05-22 02:53:37,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:37,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:37,883 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:37,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:37,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847773994] [2021-05-22 02:53:37,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847773994] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:37,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597122949] [2021-05-22 02:53:37,883 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 [2021-05-22 02:53:37,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:53:37,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:37,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-22 02:53:37,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:38,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597122949] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:38,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:38,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-05-22 02:53:38,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087834922] [2021-05-22 02:53:38,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-22 02:53:38,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:38,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-22 02:53:38,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:53:38,449 INFO L87 Difference]: Start difference. First operand 584 states and 1321 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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) [2021-05-22 02:53:39,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:39,901 INFO L93 Difference]: Finished difference Result 1217 states and 2662 transitions. [2021-05-22 02:53:39,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-22 02:53:39,902 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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) Word has length 31 [2021-05-22 02:53:39,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:39,905 INFO L225 Difference]: With dead ends: 1217 [2021-05-22 02:53:39,905 INFO L226 Difference]: Without dead ends: 1175 [2021-05-22 02:53:39,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 1525.9ms TimeCoverageRelationStatistics Valid=672, Invalid=3618, Unknown=0, NotChecked=0, Total=4290 [2021-05-22 02:53:39,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-05-22 02:53:39,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 651. [2021-05-22 02:53:39,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 650 states have (on average 2.272307692307692) internal successors, (1477), 650 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:39,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1477 transitions. [2021-05-22 02:53:39,915 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1477 transitions. Word has length 31 [2021-05-22 02:53:39,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:39,915 INFO L482 AbstractCegarLoop]: Abstraction has 651 states and 1477 transitions. [2021-05-22 02:53:39,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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) [2021-05-22 02:53:39,915 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1477 transitions. [2021-05-22 02:53:39,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-22 02:53:39,917 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:39,917 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:40,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:40,139 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:40,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:40,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1975277999, now seen corresponding path program 27 times [2021-05-22 02:53:40,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:40,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756989326] [2021-05-22 02:53:40,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:40,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:40,368 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:40,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:40,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756989326] [2021-05-22 02:53:40,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756989326] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:40,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937640546] [2021-05-22 02:53:40,369 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) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:40,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:53:40,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:40,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-22 02:53:40,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:40,882 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:40,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937640546] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:40,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:40,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-05-22 02:53:40,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040290767] [2021-05-22 02:53:40,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-22 02:53:40,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:40,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-22 02:53:40,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:53:40,884 INFO L87 Difference]: Start difference. First operand 651 states and 1477 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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) [2021-05-22 02:53:42,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:42,332 INFO L93 Difference]: Finished difference Result 1268 states and 2780 transitions. [2021-05-22 02:53:42,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-22 02:53:42,332 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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) Word has length 31 [2021-05-22 02:53:42,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:42,335 INFO L225 Difference]: With dead ends: 1268 [2021-05-22 02:53:42,335 INFO L226 Difference]: Without dead ends: 1199 [2021-05-22 02:53:42,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 1500.8ms TimeCoverageRelationStatistics Valid=518, Invalid=3022, Unknown=0, NotChecked=0, Total=3540 [2021-05-22 02:53:42,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2021-05-22 02:53:42,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 655. [2021-05-22 02:53:42,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 2.270642201834862) internal successors, (1485), 654 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:42,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1485 transitions. [2021-05-22 02:53:42,346 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1485 transitions. Word has length 31 [2021-05-22 02:53:42,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:42,346 INFO L482 AbstractCegarLoop]: Abstraction has 655 states and 1485 transitions. [2021-05-22 02:53:42,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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) [2021-05-22 02:53:42,347 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1485 transitions. [2021-05-22 02:53:42,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-22 02:53:42,348 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:42,348 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:42,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-05-22 02:53:42,570 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:42,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:42,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1055606703, now seen corresponding path program 28 times [2021-05-22 02:53:42,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:42,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444959409] [2021-05-22 02:53:42,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:42,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:42,733 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:42,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:42,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444959409] [2021-05-22 02:53:42,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444959409] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:42,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818462359] [2021-05-22 02:53:42,734 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 [2021-05-22 02:53:42,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:53:42,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:42,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-22 02:53:42,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:43,226 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:43,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818462359] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:43,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:43,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-05-22 02:53:43,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915461453] [2021-05-22 02:53:43,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-22 02:53:43,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:43,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-22 02:53:43,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:53:43,229 INFO L87 Difference]: Start difference. First operand 655 states and 1485 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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) [2021-05-22 02:53:44,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:44,919 INFO L93 Difference]: Finished difference Result 1427 states and 3120 transitions. [2021-05-22 02:53:44,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-22 02:53:44,919 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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) Word has length 31 [2021-05-22 02:53:44,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:44,923 INFO L225 Difference]: With dead ends: 1427 [2021-05-22 02:53:44,923 INFO L226 Difference]: Without dead ends: 1385 [2021-05-22 02:53:44,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 1737.4ms TimeCoverageRelationStatistics Valid=819, Invalid=4151, Unknown=0, NotChecked=0, Total=4970 [2021-05-22 02:53:44,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2021-05-22 02:53:44,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 664. [2021-05-22 02:53:44,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 2.277526395173454) internal successors, (1510), 663 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:44,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1510 transitions. [2021-05-22 02:53:44,936 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1510 transitions. Word has length 31 [2021-05-22 02:53:44,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:44,936 INFO L482 AbstractCegarLoop]: Abstraction has 664 states and 1510 transitions. [2021-05-22 02:53:44,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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) [2021-05-22 02:53:44,936 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1510 transitions. [2021-05-22 02:53:44,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-22 02:53:44,937 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:44,937 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:45,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:45,153 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:45,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:45,153 INFO L82 PathProgramCache]: Analyzing trace with hash 766958067, now seen corresponding path program 29 times [2021-05-22 02:53:45,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:45,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049062788] [2021-05-22 02:53:45,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:45,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:45,346 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:45,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:45,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049062788] [2021-05-22 02:53:45,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049062788] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:45,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171552933] [2021-05-22 02:53:45,347 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 [2021-05-22 02:53:45,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:53:45,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:45,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-22 02:53:45,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:45,868 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:45,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171552933] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:45,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:45,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-05-22 02:53:45,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736365070] [2021-05-22 02:53:45,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-22 02:53:45,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:45,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-22 02:53:45,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:53:45,870 INFO L87 Difference]: Start difference. First operand 664 states and 1510 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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) [2021-05-22 02:53:48,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:48,457 INFO L93 Difference]: Finished difference Result 1966 states and 4209 transitions. [2021-05-22 02:53:48,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-22 02:53:48,457 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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) Word has length 31 [2021-05-22 02:53:48,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:48,463 INFO L225 Difference]: With dead ends: 1966 [2021-05-22 02:53:48,463 INFO L226 Difference]: Without dead ends: 1908 [2021-05-22 02:53:48,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2733 ImplicationChecksByTransitivity, 2456.1ms TimeCoverageRelationStatistics Valid=1278, Invalid=6912, Unknown=0, NotChecked=0, Total=8190 [2021-05-22 02:53:48,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2021-05-22 02:53:48,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 774. [2021-05-22 02:53:48,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 2.2923673997412677) internal successors, (1772), 773 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) [2021-05-22 02:53:48,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1772 transitions. [2021-05-22 02:53:48,481 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1772 transitions. Word has length 31 [2021-05-22 02:53:48,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:48,481 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 1772 transitions. [2021-05-22 02:53:48,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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) [2021-05-22 02:53:48,481 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1772 transitions. [2021-05-22 02:53:48,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-22 02:53:48,483 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:48,483 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:48,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-05-22 02:53:48,701 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:48,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:48,701 INFO L82 PathProgramCache]: Analyzing trace with hash 497566775, now seen corresponding path program 30 times [2021-05-22 02:53:48,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:48,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031113616] [2021-05-22 02:53:48,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:48,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:48,856 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:48,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:48,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031113616] [2021-05-22 02:53:48,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031113616] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:48,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845268802] [2021-05-22 02:53:48,856 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 [2021-05-22 02:53:48,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 02:53:48,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:48,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-22 02:53:48,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:49,303 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:49,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845268802] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:49,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:49,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-05-22 02:53:49,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358700436] [2021-05-22 02:53:49,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:53:49,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:49,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:53:49,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:53:49,304 INFO L87 Difference]: Start difference. First operand 774 states and 1772 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 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) [2021-05-22 02:53:50,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:50,519 INFO L93 Difference]: Finished difference Result 1633 states and 3659 transitions. [2021-05-22 02:53:50,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-22 02:53:50,519 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 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) Word has length 31 [2021-05-22 02:53:50,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:50,522 INFO L225 Difference]: With dead ends: 1633 [2021-05-22 02:53:50,522 INFO L226 Difference]: Without dead ends: 1633 [2021-05-22 02:53:50,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1268.5ms TimeCoverageRelationStatistics Valid=646, Invalid=2660, Unknown=0, NotChecked=0, Total=3306 [2021-05-22 02:53:50,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2021-05-22 02:53:50,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 814. [2021-05-22 02:53:50,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 2.2976629766297663) internal successors, (1868), 813 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:50,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1868 transitions. [2021-05-22 02:53:50,538 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1868 transitions. Word has length 31 [2021-05-22 02:53:50,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:50,538 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 1868 transitions. [2021-05-22 02:53:50,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 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) [2021-05-22 02:53:50,539 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1868 transitions. [2021-05-22 02:53:50,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-22 02:53:50,540 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:50,540 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:50,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:50,762 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:50,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:50,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1094746873, now seen corresponding path program 31 times [2021-05-22 02:53:50,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:50,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692080189] [2021-05-22 02:53:50,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:50,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:51,009 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:51,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:51,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692080189] [2021-05-22 02:53:51,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692080189] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:51,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569951757] [2021-05-22 02:53:51,012 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) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:51,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:51,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-22 02:53:51,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:51,305 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:51,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569951757] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:51,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:51,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-05-22 02:53:51,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975306327] [2021-05-22 02:53:51,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:53:51,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:51,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:53:51,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:53:51,307 INFO L87 Difference]: Start difference. First operand 814 states and 1868 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:54,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:54,283 INFO L93 Difference]: Finished difference Result 1582 states and 3436 transitions. [2021-05-22 02:53:54,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-22 02:53:54,283 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-22 02:53:54,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:54,285 INFO L225 Difference]: With dead ends: 1582 [2021-05-22 02:53:54,285 INFO L226 Difference]: Without dead ends: 1525 [2021-05-22 02:53:54,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2531 ImplicationChecksByTransitivity, 2642.1ms TimeCoverageRelationStatistics Valid=908, Invalid=7464, Unknown=0, NotChecked=0, Total=8372 [2021-05-22 02:53:54,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2021-05-22 02:53:54,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 860. [2021-05-22 02:53:54,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 2.2980209545983703) internal successors, (1974), 859 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) [2021-05-22 02:53:54,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1974 transitions. [2021-05-22 02:53:54,298 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1974 transitions. Word has length 31 [2021-05-22 02:53:54,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:54,299 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 1974 transitions. [2021-05-22 02:53:54,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:54,299 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1974 transitions. [2021-05-22 02:53:54,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-22 02:53:54,300 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:54,301 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:54,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:53:54,517 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:54,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:54,517 INFO L82 PathProgramCache]: Analyzing trace with hash 175075577, now seen corresponding path program 32 times [2021-05-22 02:53:54,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:54,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658912373] [2021-05-22 02:53:54,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:54,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:54,733 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:54,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:54,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658912373] [2021-05-22 02:53:54,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658912373] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:54,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020327169] [2021-05-22 02:53:54,733 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 [2021-05-22 02:53:54,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:53:54,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:54,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-22 02:53:54,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:55,261 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:55,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020327169] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:55,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:55,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-05-22 02:53:55,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111113860] [2021-05-22 02:53:55,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-22 02:53:55,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:55,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-22 02:53:55,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:53:55,262 INFO L87 Difference]: Start difference. First operand 860 states and 1974 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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) [2021-05-22 02:53:58,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:53:58,382 INFO L93 Difference]: Finished difference Result 1889 states and 4109 transitions. [2021-05-22 02:53:58,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-22 02:53:58,382 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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) Word has length 31 [2021-05-22 02:53:58,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:53:58,386 INFO L225 Difference]: With dead ends: 1889 [2021-05-22 02:53:58,386 INFO L226 Difference]: Without dead ends: 1838 [2021-05-22 02:53:58,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3198 ImplicationChecksByTransitivity, 3022.7ms TimeCoverageRelationStatistics Valid=1421, Invalid=7891, Unknown=0, NotChecked=0, Total=9312 [2021-05-22 02:53:58,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2021-05-22 02:53:58,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 929. [2021-05-22 02:53:58,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 2.3168103448275863) internal successors, (2150), 928 states have internal predecessors, (2150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:53:58,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 2150 transitions. [2021-05-22 02:53:58,405 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 2150 transitions. Word has length 31 [2021-05-22 02:53:58,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:53:58,405 INFO L482 AbstractCegarLoop]: Abstraction has 929 states and 2150 transitions. [2021-05-22 02:53:58,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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) [2021-05-22 02:53:58,405 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 2150 transitions. [2021-05-22 02:53:58,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-22 02:53:58,407 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:53:58,407 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:53:58,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-05-22 02:53:58,630 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:53:58,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:53:58,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1294394819, now seen corresponding path program 33 times [2021-05-22 02:53:58,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:53:58,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650535614] [2021-05-22 02:53:58,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:53:58,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:53:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:58,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:53:58,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650535614] [2021-05-22 02:53:58,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650535614] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:58,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999947471] [2021-05-22 02:53:58,787 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 [2021-05-22 02:53:58,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:53:58,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:53:58,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:53:58,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:53:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:53:59,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999947471] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:53:59,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:53:59,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-22 02:53:59,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119354953] [2021-05-22 02:53:59,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:53:59,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:53:59,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:53:59,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:53:59,184 INFO L87 Difference]: Start difference. First operand 929 states and 2150 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 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) [2021-05-22 02:54:00,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:54:00,401 INFO L93 Difference]: Finished difference Result 1635 states and 3656 transitions. [2021-05-22 02:54:00,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-22 02:54:00,401 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 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) Word has length 31 [2021-05-22 02:54:00,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:54:00,403 INFO L225 Difference]: With dead ends: 1635 [2021-05-22 02:54:00,403 INFO L226 Difference]: Without dead ends: 1635 [2021-05-22 02:54:00,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1249.3ms TimeCoverageRelationStatistics Valid=631, Invalid=2675, Unknown=0, NotChecked=0, Total=3306 [2021-05-22 02:54:00,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-05-22 02:54:00,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 995. [2021-05-22 02:54:00,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 994 states have (on average 2.3158953722334004) internal successors, (2302), 994 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:00,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 2302 transitions. [2021-05-22 02:54:00,415 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 2302 transitions. Word has length 31 [2021-05-22 02:54:00,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:54:00,415 INFO L482 AbstractCegarLoop]: Abstraction has 995 states and 2302 transitions. [2021-05-22 02:54:00,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 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) [2021-05-22 02:54:00,415 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 2302 transitions. [2021-05-22 02:54:00,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-22 02:54:00,417 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:54:00,417 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:54:00,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:00,626 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:54:00,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:54:00,626 INFO L82 PathProgramCache]: Analyzing trace with hash 797857409, now seen corresponding path program 34 times [2021-05-22 02:54:00,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:54:00,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642115857] [2021-05-22 02:54:00,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:54:00,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:00,801 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:00,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:54:00,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642115857] [2021-05-22 02:54:00,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642115857] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:00,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688787968] [2021-05-22 02:54:00,802 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 [2021-05-22 02:54:00,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:54:00,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:54:00,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-22 02:54:00,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:54:01,281 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:01,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688787968] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:01,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:54:01,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-05-22 02:54:01,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665556907] [2021-05-22 02:54:01,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-22 02:54:01,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:54:01,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-22 02:54:01,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:54:01,282 INFO L87 Difference]: Start difference. First operand 995 states and 2302 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 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) [2021-05-22 02:54:04,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:54:04,136 INFO L93 Difference]: Finished difference Result 2696 states and 5900 transitions. [2021-05-22 02:54:04,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-22 02:54:04,136 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 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) Word has length 31 [2021-05-22 02:54:04,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:54:04,141 INFO L225 Difference]: With dead ends: 2696 [2021-05-22 02:54:04,141 INFO L226 Difference]: Without dead ends: 2642 [2021-05-22 02:54:04,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2427 ImplicationChecksByTransitivity, 2580.2ms TimeCoverageRelationStatistics Valid=1212, Invalid=6444, Unknown=0, NotChecked=0, Total=7656 [2021-05-22 02:54:04,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-05-22 02:54:04,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 1189. [2021-05-22 02:54:04,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 2.3526936026936025) internal successors, (2795), 1188 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:04,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 2795 transitions. [2021-05-22 02:54:04,166 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 2795 transitions. Word has length 31 [2021-05-22 02:54:04,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:54:04,166 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 2795 transitions. [2021-05-22 02:54:04,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 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) [2021-05-22 02:54:04,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 2795 transitions. [2021-05-22 02:54:04,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-22 02:54:04,167 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:54:04,167 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:54:04,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-05-22 02:54:04,368 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:54:04,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:54:04,368 INFO L82 PathProgramCache]: Analyzing trace with hash 67491499, now seen corresponding path program 35 times [2021-05-22 02:54:04,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:54:04,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858998694] [2021-05-22 02:54:04,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:54:04,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:04,501 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:04,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:54:04,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858998694] [2021-05-22 02:54:04,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858998694] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:04,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081779332] [2021-05-22 02:54:04,501 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 [2021-05-22 02:54:04,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-22 02:54:04,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:54:04,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-22 02:54:04,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:54:04,706 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:54:04,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081779332] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:04,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:54:04,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-05-22 02:54:04,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224950936] [2021-05-22 02:54:04,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:54:04,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:54:04,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:54:04,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:54:04,708 INFO L87 Difference]: Start difference. First operand 1189 states and 2795 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:06,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:54:06,573 INFO L93 Difference]: Finished difference Result 2304 states and 5171 transitions. [2021-05-22 02:54:06,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-22 02:54:06,574 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-22 02:54:06,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:54:06,577 INFO L225 Difference]: With dead ends: 2304 [2021-05-22 02:54:06,577 INFO L226 Difference]: Without dead ends: 2208 [2021-05-22 02:54:06,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2449 ImplicationChecksByTransitivity, 1554.1ms TimeCoverageRelationStatistics Valid=1219, Invalid=6263, Unknown=0, NotChecked=0, Total=7482 [2021-05-22 02:54:06,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-05-22 02:54:06,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 1478. [2021-05-22 02:54:06,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1477 states have (on average 2.360866621530129) internal successors, (3487), 1477 states have internal predecessors, (3487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:06,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 3487 transitions. [2021-05-22 02:54:06,602 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 3487 transitions. Word has length 31 [2021-05-22 02:54:06,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:54:06,602 INFO L482 AbstractCegarLoop]: Abstraction has 1478 states and 3487 transitions. [2021-05-22 02:54:06,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:06,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 3487 transitions. [2021-05-22 02:54:06,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-22 02:54:06,604 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:54:06,604 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:54:06,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:06,826 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:54:06,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:54:06,826 INFO L82 PathProgramCache]: Analyzing trace with hash 735083257, now seen corresponding path program 36 times [2021-05-22 02:54:06,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:54:06,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506366512] [2021-05-22 02:54:06,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:54:06,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:07,015 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:07,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:54:07,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506366512] [2021-05-22 02:54:07,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506366512] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:07,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640790331] [2021-05-22 02:54:07,015 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:07,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 02:54:07,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:54:07,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:54:07,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:54:07,545 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:07,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640790331] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:07,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:54:07,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-05-22 02:54:07,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863427218] [2021-05-22 02:54:07,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-22 02:54:07,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:54:07,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-22 02:54:07,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:54:07,546 INFO L87 Difference]: Start difference. First operand 1478 states and 3487 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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) [2021-05-22 02:54:09,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:54:09,641 INFO L93 Difference]: Finished difference Result 2856 states and 6422 transitions. [2021-05-22 02:54:09,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-22 02:54:09,642 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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) Word has length 31 [2021-05-22 02:54:09,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:54:09,646 INFO L225 Difference]: With dead ends: 2856 [2021-05-22 02:54:09,646 INFO L226 Difference]: Without dead ends: 2771 [2021-05-22 02:54:09,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2134 ImplicationChecksByTransitivity, 2027.3ms TimeCoverageRelationStatistics Valid=852, Invalid=5468, Unknown=0, NotChecked=0, Total=6320 [2021-05-22 02:54:09,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2771 states. [2021-05-22 02:54:09,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2771 to 1636. [2021-05-22 02:54:09,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1635 states have (on average 2.3559633027522935) internal successors, (3852), 1635 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:09,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 3852 transitions. [2021-05-22 02:54:09,675 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 3852 transitions. Word has length 31 [2021-05-22 02:54:09,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:54:09,675 INFO L482 AbstractCegarLoop]: Abstraction has 1636 states and 3852 transitions. [2021-05-22 02:54:09,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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) [2021-05-22 02:54:09,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 3852 transitions. [2021-05-22 02:54:09,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-22 02:54:09,677 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:54:09,677 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:54:09,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-05-22 02:54:09,900 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:54:09,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:54:09,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1903077501, now seen corresponding path program 37 times [2021-05-22 02:54:09,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:54:09,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46286145] [2021-05-22 02:54:09,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:54:09,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:10,104 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:10,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:54:10,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46286145] [2021-05-22 02:54:10,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46286145] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:10,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585269257] [2021-05-22 02:54:10,104 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 [2021-05-22 02:54:10,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:10,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-22 02:54:10,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:54:10,613 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:10,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585269257] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:10,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:54:10,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-05-22 02:54:10,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453006438] [2021-05-22 02:54:10,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-22 02:54:10,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:54:10,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-22 02:54:10,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:54:10,614 INFO L87 Difference]: Start difference. First operand 1636 states and 3852 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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) [2021-05-22 02:54:14,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:54:14,151 INFO L93 Difference]: Finished difference Result 3900 states and 8693 transitions. [2021-05-22 02:54:14,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-22 02:54:14,151 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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) Word has length 31 [2021-05-22 02:54:14,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:54:14,157 INFO L225 Difference]: With dead ends: 3900 [2021-05-22 02:54:14,157 INFO L226 Difference]: Without dead ends: 3784 [2021-05-22 02:54:14,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4357 ImplicationChecksByTransitivity, 3207.0ms TimeCoverageRelationStatistics Valid=1538, Invalid=10452, Unknown=0, NotChecked=0, Total=11990 [2021-05-22 02:54:14,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3784 states. [2021-05-22 02:54:14,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3784 to 1899. [2021-05-22 02:54:14,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1899 states, 1898 states have (on average 2.403582718651212) internal successors, (4562), 1898 states have internal predecessors, (4562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:14,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 4562 transitions. [2021-05-22 02:54:14,192 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 4562 transitions. Word has length 31 [2021-05-22 02:54:14,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:54:14,192 INFO L482 AbstractCegarLoop]: Abstraction has 1899 states and 4562 transitions. [2021-05-22 02:54:14,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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) [2021-05-22 02:54:14,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 4562 transitions. [2021-05-22 02:54:14,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-22 02:54:14,195 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:54:14,195 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:54:14,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable374 [2021-05-22 02:54:14,418 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:54:14,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:54:14,418 INFO L82 PathProgramCache]: Analyzing trace with hash 983406205, now seen corresponding path program 38 times [2021-05-22 02:54:14,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:54:14,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590766185] [2021-05-22 02:54:14,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:54:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:14,627 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:14,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:54:14,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590766185] [2021-05-22 02:54:14,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590766185] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:14,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848103558] [2021-05-22 02:54:14,627 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 [2021-05-22 02:54:14,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:54:14,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:54:14,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-22 02:54:14,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:54:15,235 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:15,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848103558] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:15,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:54:15,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-05-22 02:54:15,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796714269] [2021-05-22 02:54:15,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-22 02:54:15,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:54:15,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-22 02:54:15,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:54:15,237 INFO L87 Difference]: Start difference. First operand 1899 states and 4562 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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) [2021-05-22 02:54:18,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:54:18,328 INFO L93 Difference]: Finished difference Result 3505 states and 7977 transitions. [2021-05-22 02:54:18,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-22 02:54:18,329 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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) Word has length 31 [2021-05-22 02:54:18,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:54:18,332 INFO L225 Difference]: With dead ends: 3505 [2021-05-22 02:54:18,332 INFO L226 Difference]: Without dead ends: 3426 [2021-05-22 02:54:18,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2945 ImplicationChecksByTransitivity, 2964.4ms TimeCoverageRelationStatistics Valid=1212, Invalid=7530, Unknown=0, NotChecked=0, Total=8742 [2021-05-22 02:54:18,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3426 states. [2021-05-22 02:54:18,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3426 to 1879. [2021-05-22 02:54:18,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1879 states, 1878 states have (on average 2.3998935037273696) internal successors, (4507), 1878 states have internal predecessors, (4507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:18,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1879 states to 1879 states and 4507 transitions. [2021-05-22 02:54:18,357 INFO L78 Accepts]: Start accepts. Automaton has 1879 states and 4507 transitions. Word has length 31 [2021-05-22 02:54:18,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:54:18,357 INFO L482 AbstractCegarLoop]: Abstraction has 1879 states and 4507 transitions. [2021-05-22 02:54:18,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 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) [2021-05-22 02:54:18,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1879 states and 4507 transitions. [2021-05-22 02:54:18,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-22 02:54:18,360 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:54:18,360 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:54:18,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-05-22 02:54:18,583 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:54:18,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:54:18,583 INFO L82 PathProgramCache]: Analyzing trace with hash -486064191, now seen corresponding path program 39 times [2021-05-22 02:54:18,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:54:18,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172713324] [2021-05-22 02:54:18,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:54:18,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:18,764 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:54:18,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:54:18,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172713324] [2021-05-22 02:54:18,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172713324] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:18,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654661063] [2021-05-22 02:54:18,764 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 [2021-05-22 02:54:18,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-22 02:54:18,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:54:18,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:54:18,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:54:19,338 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:19,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654661063] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:19,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:54:19,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-22 02:54:19,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265499249] [2021-05-22 02:54:19,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:54:19,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:54:19,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:54:19,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:54:19,339 INFO L87 Difference]: Start difference. First operand 1879 states and 4507 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 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) [2021-05-22 02:54:20,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:54:20,943 INFO L93 Difference]: Finished difference Result 3076 states and 7034 transitions. [2021-05-22 02:54:20,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-22 02:54:20,945 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 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) Word has length 31 [2021-05-22 02:54:20,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:54:20,947 INFO L225 Difference]: With dead ends: 3076 [2021-05-22 02:54:20,947 INFO L226 Difference]: Without dead ends: 3052 [2021-05-22 02:54:20,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 1659.7ms TimeCoverageRelationStatistics Valid=823, Invalid=3337, Unknown=0, NotChecked=0, Total=4160 [2021-05-22 02:54:20,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3052 states. [2021-05-22 02:54:20,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3052 to 1766. [2021-05-22 02:54:20,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1765 states have (on average 2.3507082152974506) internal successors, (4149), 1765 states have internal predecessors, (4149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:20,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 4149 transitions. [2021-05-22 02:54:20,970 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 4149 transitions. Word has length 31 [2021-05-22 02:54:20,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:54:20,970 INFO L482 AbstractCegarLoop]: Abstraction has 1766 states and 4149 transitions. [2021-05-22 02:54:20,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 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) [2021-05-22 02:54:20,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 4149 transitions. [2021-05-22 02:54:20,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-22 02:54:20,972 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:54:20,972 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:54:21,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-05-22 02:54:21,173 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:54:21,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:54:21,173 INFO L82 PathProgramCache]: Analyzing trace with hash 2101275627, now seen corresponding path program 40 times [2021-05-22 02:54:21,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:54:21,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278103169] [2021-05-22 02:54:21,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:54:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:21,242 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:21,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:54:21,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278103169] [2021-05-22 02:54:21,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278103169] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:21,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449472342] [2021-05-22 02:54:21,242 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 [2021-05-22 02:54:21,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:54:21,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:54:21,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-22 02:54:21,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:54:21,525 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:21,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449472342] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:21,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:54:21,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-05-22 02:54:21,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891896442] [2021-05-22 02:54:21,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-22 02:54:21,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:54:21,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-22 02:54:21,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:54:21,526 INFO L87 Difference]: Start difference. First operand 1766 states and 4149 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:22,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:54:22,444 INFO L93 Difference]: Finished difference Result 2592 states and 5918 transitions. [2021-05-22 02:54:22,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-22 02:54:22,445 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-22 02:54:22,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:54:22,447 INFO L225 Difference]: With dead ends: 2592 [2021-05-22 02:54:22,447 INFO L226 Difference]: Without dead ends: 2588 [2021-05-22 02:54:22,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1218 ImplicationChecksByTransitivity, 823.5ms TimeCoverageRelationStatistics Valid=776, Invalid=3256, Unknown=0, NotChecked=0, Total=4032 [2021-05-22 02:54:22,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-05-22 02:54:22,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 1706. [2021-05-22 02:54:22,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1706 states, 1705 states have (on average 2.3530791788856305) internal successors, (4012), 1705 states have internal predecessors, (4012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:22,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 4012 transitions. [2021-05-22 02:54:22,473 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 4012 transitions. Word has length 31 [2021-05-22 02:54:22,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:54:22,474 INFO L482 AbstractCegarLoop]: Abstraction has 1706 states and 4012 transitions. [2021-05-22 02:54:22,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:22,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 4012 transitions. [2021-05-22 02:54:22,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:54:22,476 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:54:22,476 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:54:22,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable420,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:22,689 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:54:22,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:54:22,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1605471457, now seen corresponding path program 41 times [2021-05-22 02:54:22,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:54:22,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826865381] [2021-05-22 02:54:22,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:54:22,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:22,793 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:22,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:54:22,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826865381] [2021-05-22 02:54:22,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826865381] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:22,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441096386] [2021-05-22 02:54:22,794 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 [2021-05-22 02:54:22,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-22 02:54:22,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:54:22,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-22 02:54:22,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:54:23,202 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:23,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441096386] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:23,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:54:23,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-05-22 02:54:23,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380779972] [2021-05-22 02:54:23,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-22 02:54:23,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:54:23,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-22 02:54:23,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:54:23,203 INFO L87 Difference]: Start difference. First operand 1706 states and 4012 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:24,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:54:24,239 INFO L93 Difference]: Finished difference Result 3118 states and 6999 transitions. [2021-05-22 02:54:24,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-22 02:54:24,239 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:54:24,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:54:24,242 INFO L225 Difference]: With dead ends: 3118 [2021-05-22 02:54:24,242 INFO L226 Difference]: Without dead ends: 3109 [2021-05-22 02:54:24,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 1046.2ms TimeCoverageRelationStatistics Valid=1134, Invalid=3836, Unknown=0, NotChecked=0, Total=4970 [2021-05-22 02:54:24,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2021-05-22 02:54:24,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 1341. [2021-05-22 02:54:24,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 2.2753731343283583) internal successors, (3049), 1340 states have internal predecessors, (3049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:24,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 3049 transitions. [2021-05-22 02:54:24,264 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 3049 transitions. Word has length 33 [2021-05-22 02:54:24,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:54:24,264 INFO L482 AbstractCegarLoop]: Abstraction has 1341 states and 3049 transitions. [2021-05-22 02:54:24,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:24,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 3049 transitions. [2021-05-22 02:54:24,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:54:24,266 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:54:24,266 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:54:24,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-05-22 02:54:24,488 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:54:24,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:54:24,488 INFO L82 PathProgramCache]: Analyzing trace with hash -755955681, now seen corresponding path program 42 times [2021-05-22 02:54:24,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:54:24,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942801482] [2021-05-22 02:54:24,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:54:24,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:24,541 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:24,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:54:24,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942801482] [2021-05-22 02:54:24,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942801482] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:24,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084208551] [2021-05-22 02:54:24,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:24,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-22 02:54:24,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:54:24,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-22 02:54:24,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:54:24,856 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:24,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084208551] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:24,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:54:24,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 22 [2021-05-22 02:54:24,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514954683] [2021-05-22 02:54:24,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-22 02:54:24,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:54:24,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-22 02:54:24,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:54:24,857 INFO L87 Difference]: Start difference. First operand 1341 states and 3049 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 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) [2021-05-22 02:54:26,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:54:26,271 INFO L93 Difference]: Finished difference Result 1686 states and 3705 transitions. [2021-05-22 02:54:26,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-22 02:54:26,272 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 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) Word has length 33 [2021-05-22 02:54:26,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:54:26,273 INFO L225 Difference]: With dead ends: 1686 [2021-05-22 02:54:26,274 INFO L226 Difference]: Without dead ends: 1682 [2021-05-22 02:54:26,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2275 ImplicationChecksByTransitivity, 1359.6ms TimeCoverageRelationStatistics Valid=1570, Invalid=5236, Unknown=0, NotChecked=0, Total=6806 [2021-05-22 02:54:26,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2021-05-22 02:54:26,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 953. [2021-05-22 02:54:26,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 2.277310924369748) internal successors, (2168), 952 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:26,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 2168 transitions. [2021-05-22 02:54:26,284 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 2168 transitions. Word has length 33 [2021-05-22 02:54:26,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:54:26,284 INFO L482 AbstractCegarLoop]: Abstraction has 953 states and 2168 transitions. [2021-05-22 02:54:26,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 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) [2021-05-22 02:54:26,284 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 2168 transitions. [2021-05-22 02:54:26,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:54:26,285 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:54:26,285 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:54:26,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:26,486 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:54:26,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:54:26,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1705903345, now seen corresponding path program 43 times [2021-05-22 02:54:26,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:54:26,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452273881] [2021-05-22 02:54:26,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:54:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:26,677 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:26,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:54:26,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452273881] [2021-05-22 02:54:26,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452273881] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:26,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050987956] [2021-05-22 02:54:26,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:26,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:26,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-22 02:54:26,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:54:27,222 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:27,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050987956] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:27,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:54:27,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-05-22 02:54:27,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142990894] [2021-05-22 02:54:27,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:54:27,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:54:27,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:54:27,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=976, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:54:27,223 INFO L87 Difference]: Start difference. First operand 953 states and 2168 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:29,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:54:29,140 INFO L93 Difference]: Finished difference Result 1262 states and 2779 transitions. [2021-05-22 02:54:29,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-22 02:54:29,141 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:54:29,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:54:29,142 INFO L225 Difference]: With dead ends: 1262 [2021-05-22 02:54:29,142 INFO L226 Difference]: Without dead ends: 1211 [2021-05-22 02:54:29,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 1969.8ms TimeCoverageRelationStatistics Valid=429, Invalid=4401, Unknown=0, NotChecked=0, Total=4830 [2021-05-22 02:54:29,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2021-05-22 02:54:29,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 997. [2021-05-22 02:54:29,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 2.2710843373493974) internal successors, (2262), 996 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:29,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 2262 transitions. [2021-05-22 02:54:29,151 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 2262 transitions. Word has length 33 [2021-05-22 02:54:29,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:54:29,151 INFO L482 AbstractCegarLoop]: Abstraction has 997 states and 2262 transitions. [2021-05-22 02:54:29,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:29,152 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 2262 transitions. [2021-05-22 02:54:29,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:54:29,153 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:54:29,153 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:54:29,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:29,363 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:54:29,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:54:29,363 INFO L82 PathProgramCache]: Analyzing trace with hash -660596615, now seen corresponding path program 44 times [2021-05-22 02:54:29,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:54:29,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377724839] [2021-05-22 02:54:29,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:54:29,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:29,572 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:29,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:54:29,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377724839] [2021-05-22 02:54:29,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377724839] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:29,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343068152] [2021-05-22 02:54:29,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:29,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:54:29,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:54:29,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:54:29,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:54:30,112 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:30,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343068152] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:30,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:54:30,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-05-22 02:54:30,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441956963] [2021-05-22 02:54:30,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:54:30,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:54:30,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:54:30,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:54:30,113 INFO L87 Difference]: Start difference. First operand 997 states and 2262 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:32,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:54:32,980 INFO L93 Difference]: Finished difference Result 1563 states and 3372 transitions. [2021-05-22 02:54:32,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-22 02:54:32,981 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:54:32,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:54:32,982 INFO L225 Difference]: With dead ends: 1563 [2021-05-22 02:54:32,982 INFO L226 Difference]: Without dead ends: 1473 [2021-05-22 02:54:32,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2530 ImplicationChecksByTransitivity, 2564.0ms TimeCoverageRelationStatistics Valid=718, Invalid=8024, Unknown=0, NotChecked=0, Total=8742 [2021-05-22 02:54:32,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2021-05-22 02:54:32,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1042. [2021-05-22 02:54:32,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1041 states have (on average 2.2632084534101824) internal successors, (2356), 1041 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:32,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 2356 transitions. [2021-05-22 02:54:32,992 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 2356 transitions. Word has length 33 [2021-05-22 02:54:32,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:54:32,992 INFO L482 AbstractCegarLoop]: Abstraction has 1042 states and 2356 transitions. [2021-05-22 02:54:32,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:32,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 2356 transitions. [2021-05-22 02:54:32,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:54:32,994 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:54:32,994 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:54:33,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-05-22 02:54:33,207 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:54:33,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:54:33,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1395928629, now seen corresponding path program 45 times [2021-05-22 02:54:33,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:54:33,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716751712] [2021-05-22 02:54:33,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:54:33,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:33,409 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:33,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:54:33,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716751712] [2021-05-22 02:54:33,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716751712] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:33,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904404624] [2021-05-22 02:54:33,409 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 [2021-05-22 02:54:33,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-22 02:54:33,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:54:33,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:54:33,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:54:33,952 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:33,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904404624] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:33,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:54:33,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-05-22 02:54:33,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849331006] [2021-05-22 02:54:33,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:54:33,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:54:33,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:54:33,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:54:33,954 INFO L87 Difference]: Start difference. First operand 1042 states and 2356 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:37,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:54:37,006 INFO L93 Difference]: Finished difference Result 1689 states and 3627 transitions. [2021-05-22 02:54:37,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-22 02:54:37,006 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:54:37,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:54:37,008 INFO L225 Difference]: With dead ends: 1689 [2021-05-22 02:54:37,008 INFO L226 Difference]: Without dead ends: 1674 [2021-05-22 02:54:37,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3180 ImplicationChecksByTransitivity, 2720.3ms TimeCoverageRelationStatistics Valid=809, Invalid=9697, Unknown=0, NotChecked=0, Total=10506 [2021-05-22 02:54:37,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2021-05-22 02:54:37,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1087. [2021-05-22 02:54:37,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 2.2808471454880292) internal successors, (2477), 1086 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:37,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 2477 transitions. [2021-05-22 02:54:37,018 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 2477 transitions. Word has length 33 [2021-05-22 02:54:37,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:54:37,018 INFO L482 AbstractCegarLoop]: Abstraction has 1087 states and 2477 transitions. [2021-05-22 02:54:37,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:37,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 2477 transitions. [2021-05-22 02:54:37,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:54:37,020 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:54:37,020 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:54:37,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:37,225 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:54:37,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:54:37,225 INFO L82 PathProgramCache]: Analyzing trace with hash -2066614151, now seen corresponding path program 46 times [2021-05-22 02:54:37,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:54:37,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516950922] [2021-05-22 02:54:37,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:54:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:37,426 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:37,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:54:37,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516950922] [2021-05-22 02:54:37,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516950922] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:37,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954107630] [2021-05-22 02:54:37,427 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 [2021-05-22 02:54:37,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:54:37,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:54:37,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-22 02:54:37,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:54:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:37,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954107630] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:37,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:54:37,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-05-22 02:54:37,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617141110] [2021-05-22 02:54:37,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:54:37,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:54:37,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:54:37,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:54:37,955 INFO L87 Difference]: Start difference. First operand 1087 states and 2477 transitions. Second operand has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:39,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:54:39,938 INFO L93 Difference]: Finished difference Result 1528 states and 3365 transitions. [2021-05-22 02:54:39,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-22 02:54:39,939 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:54:39,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:54:39,940 INFO L225 Difference]: With dead ends: 1528 [2021-05-22 02:54:39,940 INFO L226 Difference]: Without dead ends: 1519 [2021-05-22 02:54:39,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2034 ImplicationChecksByTransitivity, 1804.0ms TimeCoverageRelationStatistics Valid=674, Invalid=5806, Unknown=0, NotChecked=0, Total=6480 [2021-05-22 02:54:39,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2021-05-22 02:54:39,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 1171. [2021-05-22 02:54:39,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 2.288034188034188) internal successors, (2677), 1170 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:39,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 2677 transitions. [2021-05-22 02:54:39,951 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 2677 transitions. Word has length 33 [2021-05-22 02:54:39,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:54:39,952 INFO L482 AbstractCegarLoop]: Abstraction has 1171 states and 2677 transitions. [2021-05-22 02:54:39,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:39,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 2677 transitions. [2021-05-22 02:54:39,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:54:39,953 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:54:39,953 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:54:40,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:40,154 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:54:40,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:54:40,154 INFO L82 PathProgramCache]: Analyzing trace with hash 2099610557, now seen corresponding path program 47 times [2021-05-22 02:54:40,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:54:40,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072085644] [2021-05-22 02:54:40,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:54:40,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:40,373 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:40,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:54:40,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072085644] [2021-05-22 02:54:40,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072085644] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:40,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703277113] [2021-05-22 02:54:40,373 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 [2021-05-22 02:54:40,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-22 02:54:40,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:54:40,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-22 02:54:40,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:54:40,910 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:40,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703277113] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:40,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:54:40,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-05-22 02:54:40,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449360442] [2021-05-22 02:54:40,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:54:40,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:54:40,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:54:40,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:54:40,911 INFO L87 Difference]: Start difference. First operand 1171 states and 2677 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:44,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:54:44,986 INFO L93 Difference]: Finished difference Result 1919 states and 4191 transitions. [2021-05-22 02:54:44,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-22 02:54:44,986 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:54:44,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:54:44,988 INFO L225 Difference]: With dead ends: 1919 [2021-05-22 02:54:44,988 INFO L226 Difference]: Without dead ends: 1913 [2021-05-22 02:54:44,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2979 ImplicationChecksByTransitivity, 3587.8ms TimeCoverageRelationStatistics Valid=1082, Invalid=9630, Unknown=0, NotChecked=0, Total=10712 [2021-05-22 02:54:44,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-05-22 02:54:45,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1267. [2021-05-22 02:54:45,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1266 states have (on average 2.3183254344391786) internal successors, (2935), 1266 states have internal predecessors, (2935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:45,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 2935 transitions. [2021-05-22 02:54:45,004 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 2935 transitions. Word has length 33 [2021-05-22 02:54:45,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:54:45,004 INFO L482 AbstractCegarLoop]: Abstraction has 1267 states and 2935 transitions. [2021-05-22 02:54:45,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:45,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 2935 transitions. [2021-05-22 02:54:45,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:54:45,006 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:54:45,006 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:54:45,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable523,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:45,228 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:54:45,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:54:45,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1545287769, now seen corresponding path program 48 times [2021-05-22 02:54:45,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:54:45,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608363528] [2021-05-22 02:54:45,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:54:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:45,451 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:45,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:54:45,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608363528] [2021-05-22 02:54:45,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608363528] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:45,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052486864] [2021-05-22 02:54:45,452 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 [2021-05-22 02:54:45,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 02:54:45,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:54:45,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-22 02:54:45,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:54:46,060 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:46,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052486864] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:46,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:54:46,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-05-22 02:54:46,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431249812] [2021-05-22 02:54:46,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:54:46,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:54:46,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:54:46,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:54:46,061 INFO L87 Difference]: Start difference. First operand 1267 states and 2935 transitions. Second operand has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 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) [2021-05-22 02:54:48,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:54:48,293 INFO L93 Difference]: Finished difference Result 1626 states and 3636 transitions. [2021-05-22 02:54:48,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-22 02:54:48,294 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 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 33 [2021-05-22 02:54:48,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:54:48,295 INFO L225 Difference]: With dead ends: 1626 [2021-05-22 02:54:48,295 INFO L226 Difference]: Without dead ends: 1611 [2021-05-22 02:54:48,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 2159.1ms TimeCoverageRelationStatistics Valid=560, Invalid=4552, Unknown=0, NotChecked=0, Total=5112 [2021-05-22 02:54:48,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-05-22 02:54:48,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1287. [2021-05-22 02:54:48,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1286 states have (on average 2.3195956454121305) internal successors, (2983), 1286 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:48,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 2983 transitions. [2021-05-22 02:54:48,309 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 2983 transitions. Word has length 33 [2021-05-22 02:54:48,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:54:48,309 INFO L482 AbstractCegarLoop]: Abstraction has 1287 states and 2983 transitions. [2021-05-22 02:54:48,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 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) [2021-05-22 02:54:48,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 2983 transitions. [2021-05-22 02:54:48,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:54:48,311 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:54:48,311 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:54:48,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:48,511 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:54:48,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:54:48,512 INFO L82 PathProgramCache]: Analyzing trace with hash 497583413, now seen corresponding path program 49 times [2021-05-22 02:54:48,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:54:48,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814958156] [2021-05-22 02:54:48,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:54:48,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:48,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:54:48,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814958156] [2021-05-22 02:54:48,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814958156] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:48,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627640271] [2021-05-22 02:54:48,795 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 [2021-05-22 02:54:48,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:48,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:54:48,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:54:49,108 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:49,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627640271] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:49,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:54:49,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 27 [2021-05-22 02:54:49,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168500173] [2021-05-22 02:54:49,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-22 02:54:49,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:54:49,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-22 02:54:49,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:54:49,109 INFO L87 Difference]: Start difference. First operand 1287 states and 2983 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:50,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:54:50,721 INFO L93 Difference]: Finished difference Result 1934 states and 4341 transitions. [2021-05-22 02:54:50,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-22 02:54:50,722 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:54:50,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:54:50,724 INFO L225 Difference]: With dead ends: 1934 [2021-05-22 02:54:50,724 INFO L226 Difference]: Without dead ends: 1918 [2021-05-22 02:54:50,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1535.2ms TimeCoverageRelationStatistics Valid=491, Invalid=3049, Unknown=0, NotChecked=0, Total=3540 [2021-05-22 02:54:50,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-05-22 02:54:50,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1287. [2021-05-22 02:54:50,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1286 states have (on average 2.3149300155520995) internal successors, (2977), 1286 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:50,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 2977 transitions. [2021-05-22 02:54:50,737 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 2977 transitions. Word has length 33 [2021-05-22 02:54:50,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:54:50,737 INFO L482 AbstractCegarLoop]: Abstraction has 1287 states and 2977 transitions. [2021-05-22 02:54:50,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:50,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 2977 transitions. [2021-05-22 02:54:50,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:54:50,739 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:54:50,739 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:54:50,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:50,953 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:54:50,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:54:50,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1527671729, now seen corresponding path program 50 times [2021-05-22 02:54:50,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:54:50,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946011805] [2021-05-22 02:54:50,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:54:50,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:51,197 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:51,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:54:51,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946011805] [2021-05-22 02:54:51,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946011805] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:51,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111868262] [2021-05-22 02:54:51,198 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) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:51,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:54:51,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:54:51,221 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-22 02:54:51,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:54:51,958 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:51,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111868262] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:51,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:54:51,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-05-22 02:54:51,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366562602] [2021-05-22 02:54:51,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-22 02:54:51,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:54:51,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-22 02:54:51,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:54:51,959 INFO L87 Difference]: Start difference. First operand 1287 states and 2977 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:53,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:54:53,940 INFO L93 Difference]: Finished difference Result 1543 states and 3469 transitions. [2021-05-22 02:54:53,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-22 02:54:53,940 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:54:53,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:54:53,941 INFO L225 Difference]: With dead ends: 1543 [2021-05-22 02:54:53,941 INFO L226 Difference]: Without dead ends: 1491 [2021-05-22 02:54:53,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 2098.8ms TimeCoverageRelationStatistics Valid=481, Invalid=4489, Unknown=0, NotChecked=0, Total=4970 [2021-05-22 02:54:53,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2021-05-22 02:54:53,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1288. [2021-05-22 02:54:53,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 2.312354312354312) internal successors, (2976), 1287 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:53,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 2976 transitions. [2021-05-22 02:54:53,953 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 2976 transitions. Word has length 33 [2021-05-22 02:54:53,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:54:53,953 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 2976 transitions. [2021-05-22 02:54:53,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:53,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 2976 transitions. [2021-05-22 02:54:53,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:54:53,955 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:54:53,955 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:54:54,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2021-05-22 02:54:54,158 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:54:54,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:54:54,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1040701503, now seen corresponding path program 51 times [2021-05-22 02:54:54,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:54:54,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357903005] [2021-05-22 02:54:54,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:54:54,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:54,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:54:54,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357903005] [2021-05-22 02:54:54,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357903005] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:54,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225243592] [2021-05-22 02:54:54,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:54,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-22 02:54:54,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:54:54,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:54:54,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:54:55,046 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:55,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225243592] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:55,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:54:55,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-05-22 02:54:55,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496959499] [2021-05-22 02:54:55,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:54:55,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:54:55,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:54:55,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:54:55,047 INFO L87 Difference]: Start difference. First operand 1288 states and 2976 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:58,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:54:58,691 INFO L93 Difference]: Finished difference Result 1720 states and 3833 transitions. [2021-05-22 02:54:58,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-22 02:54:58,691 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:54:58,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:54:58,693 INFO L225 Difference]: With dead ends: 1720 [2021-05-22 02:54:58,693 INFO L226 Difference]: Without dead ends: 1654 [2021-05-22 02:54:58,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2654 ImplicationChecksByTransitivity, 3441.9ms TimeCoverageRelationStatistics Valid=647, Invalid=8665, Unknown=0, NotChecked=0, Total=9312 [2021-05-22 02:54:58,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2021-05-22 02:54:58,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1395. [2021-05-22 02:54:58,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1394 states have (on average 2.317790530846485) internal successors, (3231), 1394 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:58,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 3231 transitions. [2021-05-22 02:54:58,705 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 3231 transitions. Word has length 33 [2021-05-22 02:54:58,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:54:58,705 INFO L482 AbstractCegarLoop]: Abstraction has 1395 states and 3231 transitions. [2021-05-22 02:54:58,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:54:58,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 3231 transitions. [2021-05-22 02:54:58,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:54:58,706 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:54:58,706 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:54:58,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-05-22 02:54:58,907 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:54:58,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:54:58,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1325798457, now seen corresponding path program 52 times [2021-05-22 02:54:58,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:54:58,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096837996] [2021-05-22 02:54:58,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:54:58,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:54:59,148 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:59,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:54:59,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096837996] [2021-05-22 02:54:59,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096837996] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:59,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140247948] [2021-05-22 02:54:59,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:54:59,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:54:59,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:54:59,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:54:59,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:54:59,756 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:54:59,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140247948] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:54:59,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:54:59,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-05-22 02:54:59,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578630659] [2021-05-22 02:54:59,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:54:59,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:54:59,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:54:59,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=973, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:54:59,757 INFO L87 Difference]: Start difference. First operand 1395 states and 3231 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:05,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:55:05,081 INFO L93 Difference]: Finished difference Result 1758 states and 3924 transitions. [2021-05-22 02:55:05,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-22 02:55:05,082 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:55:05,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:55:05,083 INFO L225 Difference]: With dead ends: 1758 [2021-05-22 02:55:05,083 INFO L226 Difference]: Without dead ends: 1734 [2021-05-22 02:55:05,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4515 ImplicationChecksByTransitivity, 4988.8ms TimeCoverageRelationStatistics Valid=947, Invalid=13095, Unknown=0, NotChecked=0, Total=14042 [2021-05-22 02:55:05,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-05-22 02:55:05,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1409. [2021-05-22 02:55:05,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 2.321022727272727) internal successors, (3268), 1408 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:05,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 3268 transitions. [2021-05-22 02:55:05,098 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 3268 transitions. Word has length 33 [2021-05-22 02:55:05,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:55:05,098 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 3268 transitions. [2021-05-22 02:55:05,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:05,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 3268 transitions. [2021-05-22 02:55:05,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:55:05,100 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:55:05,100 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:55:05,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-05-22 02:55:05,317 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:55:05,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:55:05,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1454541045, now seen corresponding path program 53 times [2021-05-22 02:55:05,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:55:05,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365912730] [2021-05-22 02:55:05,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:55:05,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:55:05,576 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:05,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:55:05,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365912730] [2021-05-22 02:55:05,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365912730] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:05,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528216734] [2021-05-22 02:55:05,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:55:05,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-22 02:55:05,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:55:05,615 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-22 02:55:05,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:55:06,235 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:06,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528216734] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:06,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:55:06,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-05-22 02:55:06,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775897744] [2021-05-22 02:55:06,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:55:06,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:55:06,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:55:06,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:55:06,236 INFO L87 Difference]: Start difference. First operand 1409 states and 3268 transitions. Second operand has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:08,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:55:08,792 INFO L93 Difference]: Finished difference Result 2073 states and 4601 transitions. [2021-05-22 02:55:08,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-22 02:55:08,792 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:55:08,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:55:08,795 INFO L225 Difference]: With dead ends: 2073 [2021-05-22 02:55:08,795 INFO L226 Difference]: Without dead ends: 2070 [2021-05-22 02:55:08,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2117 ImplicationChecksByTransitivity, 2621.9ms TimeCoverageRelationStatistics Valid=756, Invalid=6216, Unknown=0, NotChecked=0, Total=6972 [2021-05-22 02:55:08,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2021-05-22 02:55:08,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 1510. [2021-05-22 02:55:08,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1509 states have (on average 2.3459244532803183) internal successors, (3540), 1509 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:08,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 3540 transitions. [2021-05-22 02:55:08,812 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 3540 transitions. Word has length 33 [2021-05-22 02:55:08,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:55:08,812 INFO L482 AbstractCegarLoop]: Abstraction has 1510 states and 3540 transitions. [2021-05-22 02:55:08,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:08,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 3540 transitions. [2021-05-22 02:55:08,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:55:08,814 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:55:08,815 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:55:09,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-05-22 02:55:09,017 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:55:09,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:55:09,017 INFO L82 PathProgramCache]: Analyzing trace with hash 121030207, now seen corresponding path program 54 times [2021-05-22 02:55:09,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:55:09,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113093595] [2021-05-22 02:55:09,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:55:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:55:09,329 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:09,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:55:09,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113093595] [2021-05-22 02:55:09,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113093595] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:09,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074719845] [2021-05-22 02:55:09,329 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 [2021-05-22 02:55:09,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 02:55:09,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:55:09,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:55:09,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:55:09,915 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:09,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074719845] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:09,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:55:09,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-22 02:55:09,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706919566] [2021-05-22 02:55:09,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-22 02:55:09,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:55:09,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-22 02:55:09,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:55:09,916 INFO L87 Difference]: Start difference. First operand 1510 states and 3540 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:12,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:55:12,303 INFO L93 Difference]: Finished difference Result 2367 states and 5373 transitions. [2021-05-22 02:55:12,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-22 02:55:12,303 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:55:12,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:55:12,305 INFO L225 Difference]: With dead ends: 2367 [2021-05-22 02:55:12,305 INFO L226 Difference]: Without dead ends: 2333 [2021-05-22 02:55:12,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 2417.8ms TimeCoverageRelationStatistics Valid=589, Invalid=3833, Unknown=0, NotChecked=0, Total=4422 [2021-05-22 02:55:12,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2021-05-22 02:55:12,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1622. [2021-05-22 02:55:12,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 2.338679827267119) internal successors, (3791), 1621 states have internal predecessors, (3791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:12,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 3791 transitions. [2021-05-22 02:55:12,321 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 3791 transitions. Word has length 33 [2021-05-22 02:55:12,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:55:12,321 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 3791 transitions. [2021-05-22 02:55:12,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:12,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 3791 transitions. [2021-05-22 02:55:12,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:55:12,323 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:55:12,323 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:55:12,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable652 [2021-05-22 02:55:12,524 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:55:12,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:55:12,524 INFO L82 PathProgramCache]: Analyzing trace with hash -167618429, now seen corresponding path program 55 times [2021-05-22 02:55:12,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:55:12,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139211835] [2021-05-22 02:55:12,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:55:12,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:55:12,805 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:12,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:55:12,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139211835] [2021-05-22 02:55:12,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139211835] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:12,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983844467] [2021-05-22 02:55:12,806 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 [2021-05-22 02:55:12,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:55:12,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:55:12,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:55:13,321 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:13,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983844467] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:13,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:55:13,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-22 02:55:13,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765918948] [2021-05-22 02:55:13,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-22 02:55:13,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:55:13,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-22 02:55:13,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:55:13,322 INFO L87 Difference]: Start difference. First operand 1622 states and 3791 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:16,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:55:16,374 INFO L93 Difference]: Finished difference Result 2788 states and 6296 transitions. [2021-05-22 02:55:16,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-22 02:55:16,374 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:55:16,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:55:16,377 INFO L225 Difference]: With dead ends: 2788 [2021-05-22 02:55:16,377 INFO L226 Difference]: Without dead ends: 2754 [2021-05-22 02:55:16,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 2843.9ms TimeCoverageRelationStatistics Valid=761, Invalid=4939, Unknown=0, NotChecked=0, Total=5700 [2021-05-22 02:55:16,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2754 states. [2021-05-22 02:55:16,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2754 to 1754. [2021-05-22 02:55:16,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1754 states, 1753 states have (on average 2.3462635482030803) internal successors, (4113), 1753 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:16,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 4113 transitions. [2021-05-22 02:55:16,396 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 4113 transitions. Word has length 33 [2021-05-22 02:55:16,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:55:16,396 INFO L482 AbstractCegarLoop]: Abstraction has 1754 states and 4113 transitions. [2021-05-22 02:55:16,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:16,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 4113 transitions. [2021-05-22 02:55:16,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:55:16,398 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:55:16,398 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:55:16,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:55:16,599 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:55:16,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:55:16,599 INFO L82 PathProgramCache]: Analyzing trace with hash 534308859, now seen corresponding path program 56 times [2021-05-22 02:55:16,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:55:16,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372352231] [2021-05-22 02:55:16,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:55:16,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:55:16,845 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:16,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:55:16,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372352231] [2021-05-22 02:55:16,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372352231] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:16,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723573893] [2021-05-22 02:55:16,845 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 [2021-05-22 02:55:16,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:55:16,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:55:16,873 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-22 02:55:16,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:55:17,612 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:17,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723573893] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:17,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:55:17,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-05-22 02:55:17,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849029285] [2021-05-22 02:55:17,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:55:17,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:55:17,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:55:17,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:55:17,613 INFO L87 Difference]: Start difference. First operand 1754 states and 4113 transitions. Second operand has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:19,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:55:19,520 INFO L93 Difference]: Finished difference Result 2147 states and 4872 transitions. [2021-05-22 02:55:19,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-22 02:55:19,521 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:55:19,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:55:19,523 INFO L225 Difference]: With dead ends: 2147 [2021-05-22 02:55:19,523 INFO L226 Difference]: Without dead ends: 2126 [2021-05-22 02:55:19,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 1895.7ms TimeCoverageRelationStatistics Valid=340, Invalid=4082, Unknown=0, NotChecked=0, Total=4422 [2021-05-22 02:55:19,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-05-22 02:55:19,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1806. [2021-05-22 02:55:19,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1805 states have (on average 2.3473684210526318) internal successors, (4237), 1805 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:19,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 4237 transitions. [2021-05-22 02:55:19,540 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 4237 transitions. Word has length 33 [2021-05-22 02:55:19,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:55:19,540 INFO L482 AbstractCegarLoop]: Abstraction has 1806 states and 4237 transitions. [2021-05-22 02:55:19,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:19,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 4237 transitions. [2021-05-22 02:55:19,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:55:19,542 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:55:19,542 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:55:19,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable692,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:55:19,742 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:55:19,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:55:19,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1630351679, now seen corresponding path program 57 times [2021-05-22 02:55:19,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:55:19,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818770028] [2021-05-22 02:55:19,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:55:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:55:20,005 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:20,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:55:20,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818770028] [2021-05-22 02:55:20,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818770028] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:20,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943942398] [2021-05-22 02:55:20,006 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 [2021-05-22 02:55:20,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:55:20,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:55:20,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-22 02:55:20,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:55:20,690 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:20,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943942398] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:20,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:55:20,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-05-22 02:55:20,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96284523] [2021-05-22 02:55:20,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:55:20,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:55:20,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:55:20,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:55:20,691 INFO L87 Difference]: Start difference. First operand 1806 states and 4237 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:22,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:55:22,997 INFO L93 Difference]: Finished difference Result 2353 states and 5326 transitions. [2021-05-22 02:55:22,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-22 02:55:22,997 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:55:22,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:55:23,000 INFO L225 Difference]: With dead ends: 2353 [2021-05-22 02:55:23,000 INFO L226 Difference]: Without dead ends: 2311 [2021-05-22 02:55:23,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1812 ImplicationChecksByTransitivity, 2410.7ms TimeCoverageRelationStatistics Valid=799, Invalid=5521, Unknown=0, NotChecked=0, Total=6320 [2021-05-22 02:55:23,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2311 states. [2021-05-22 02:55:23,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2311 to 1865. [2021-05-22 02:55:23,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1864 states have (on average 2.342811158798283) internal successors, (4367), 1864 states have internal predecessors, (4367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:23,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 4367 transitions. [2021-05-22 02:55:23,027 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 4367 transitions. Word has length 33 [2021-05-22 02:55:23,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:55:23,027 INFO L482 AbstractCegarLoop]: Abstraction has 1865 states and 4367 transitions. [2021-05-22 02:55:23,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:23,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 4367 transitions. [2021-05-22 02:55:23,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:55:23,029 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:55:23,030 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:55:23,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable708,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:55:23,237 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:55:23,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:55:23,237 INFO L82 PathProgramCache]: Analyzing trace with hash -385362437, now seen corresponding path program 58 times [2021-05-22 02:55:23,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:55:23,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754841988] [2021-05-22 02:55:23,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:55:23,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:55:23,576 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:23,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:55:23,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754841988] [2021-05-22 02:55:23,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754841988] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:23,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787898322] [2021-05-22 02:55:23,577 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 [2021-05-22 02:55:23,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:55:23,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:55:23,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:55:23,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:55:24,135 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:24,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787898322] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:24,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:55:24,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-05-22 02:55:24,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701907051] [2021-05-22 02:55:24,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-22 02:55:24,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:55:24,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-22 02:55:24,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:55:24,136 INFO L87 Difference]: Start difference. First operand 1865 states and 4367 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:26,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:55:26,658 INFO L93 Difference]: Finished difference Result 3037 states and 6913 transitions. [2021-05-22 02:55:26,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-22 02:55:26,658 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:55:26,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:55:26,661 INFO L225 Difference]: With dead ends: 3037 [2021-05-22 02:55:26,661 INFO L226 Difference]: Without dead ends: 2970 [2021-05-22 02:55:26,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 2568.4ms TimeCoverageRelationStatistics Valid=826, Invalid=4576, Unknown=0, NotChecked=0, Total=5402 [2021-05-22 02:55:26,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2970 states. [2021-05-22 02:55:26,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2970 to 1932. [2021-05-22 02:55:26,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 2.335059554634904) internal successors, (4509), 1931 states have internal predecessors, (4509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:26,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 4509 transitions. [2021-05-22 02:55:26,685 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 4509 transitions. Word has length 33 [2021-05-22 02:55:26,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:55:26,685 INFO L482 AbstractCegarLoop]: Abstraction has 1932 states and 4509 transitions. [2021-05-22 02:55:26,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:26,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 4509 transitions. [2021-05-22 02:55:26,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:55:26,687 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:55:26,688 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:55:26,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable730 [2021-05-22 02:55:26,888 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:55:26,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:55:26,888 INFO L82 PathProgramCache]: Analyzing trace with hash 237419395, now seen corresponding path program 59 times [2021-05-22 02:55:26,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:55:26,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827071798] [2021-05-22 02:55:26,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:55:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:55:27,097 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:27,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:55:27,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827071798] [2021-05-22 02:55:27,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827071798] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:27,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232727374] [2021-05-22 02:55:27,098 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 [2021-05-22 02:55:27,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-22 02:55:27,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:55:27,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:55:27,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:55:27,677 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:27,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232727374] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:27,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:55:27,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-05-22 02:55:27,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796802321] [2021-05-22 02:55:27,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-22 02:55:27,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:55:27,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-22 02:55:27,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:55:27,679 INFO L87 Difference]: Start difference. First operand 1932 states and 4509 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:30,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:55:30,217 INFO L93 Difference]: Finished difference Result 3720 states and 8375 transitions. [2021-05-22 02:55:30,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-22 02:55:30,217 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:55:30,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:55:30,220 INFO L225 Difference]: With dead ends: 3720 [2021-05-22 02:55:30,220 INFO L226 Difference]: Without dead ends: 3639 [2021-05-22 02:55:30,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 2449.2ms TimeCoverageRelationStatistics Valid=944, Invalid=4908, Unknown=0, NotChecked=0, Total=5852 [2021-05-22 02:55:30,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3639 states. [2021-05-22 02:55:30,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3639 to 2060. [2021-05-22 02:55:30,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2060 states, 2059 states have (on average 2.329286061194755) internal successors, (4796), 2059 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:30,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 4796 transitions. [2021-05-22 02:55:30,247 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 4796 transitions. Word has length 33 [2021-05-22 02:55:30,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:55:30,247 INFO L482 AbstractCegarLoop]: Abstraction has 2060 states and 4796 transitions. [2021-05-22 02:55:30,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:30,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 4796 transitions. [2021-05-22 02:55:30,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-22 02:55:30,249 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:55:30,249 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:55:30,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable748,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:55:30,450 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:55:30,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:55:30,450 INFO L82 PathProgramCache]: Analyzing trace with hash 174645243, now seen corresponding path program 60 times [2021-05-22 02:55:30,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:55:30,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818323075] [2021-05-22 02:55:30,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:55:30,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:55:30,683 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:30,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:55:30,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818323075] [2021-05-22 02:55:30,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818323075] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:30,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143112290] [2021-05-22 02:55:30,683 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 [2021-05-22 02:55:30,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 02:55:30,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:55:30,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-22 02:55:30,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:55:31,213 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:31,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143112290] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:31,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:55:31,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-05-22 02:55:31,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328433754] [2021-05-22 02:55:31,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-22 02:55:31,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:55:31,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-22 02:55:31,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:55:31,214 INFO L87 Difference]: Start difference. First operand 2060 states and 4796 transitions. Second operand has 32 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:34,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:55:34,154 INFO L93 Difference]: Finished difference Result 3836 states and 8664 transitions. [2021-05-22 02:55:34,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-22 02:55:34,155 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:55:34,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:55:34,158 INFO L225 Difference]: With dead ends: 3836 [2021-05-22 02:55:34,158 INFO L226 Difference]: Without dead ends: 3773 [2021-05-22 02:55:34,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2003 ImplicationChecksByTransitivity, 2811.9ms TimeCoverageRelationStatistics Valid=1036, Invalid=6620, Unknown=0, NotChecked=0, Total=7656 [2021-05-22 02:55:34,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3773 states. [2021-05-22 02:55:34,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3773 to 2341. [2021-05-22 02:55:34,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2341 states, 2340 states have (on average 2.345726495726496) internal successors, (5489), 2340 states have internal predecessors, (5489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:34,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2341 states to 2341 states and 5489 transitions. [2021-05-22 02:55:34,185 INFO L78 Accepts]: Start accepts. Automaton has 2341 states and 5489 transitions. Word has length 33 [2021-05-22 02:55:34,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:55:34,185 INFO L482 AbstractCegarLoop]: Abstraction has 2341 states and 5489 transitions. [2021-05-22 02:55:34,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:34,185 INFO L276 IsEmpty]: Start isEmpty. Operand 2341 states and 5489 transitions. [2021-05-22 02:55:34,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:55:34,188 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:55:34,188 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:55:34,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable765 [2021-05-22 02:55:34,388 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:55:34,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:55:34,389 INFO L82 PathProgramCache]: Analyzing trace with hash 42093407, now seen corresponding path program 61 times [2021-05-22 02:55:34,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:55:34,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866395540] [2021-05-22 02:55:34,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:55:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:55:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:34,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:55:34,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866395540] [2021-05-22 02:55:34,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866395540] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:34,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249705750] [2021-05-22 02:55:34,575 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 [2021-05-22 02:55:34,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:55:34,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-22 02:55:34,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:55:35,190 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:35,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249705750] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:35,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:55:35,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-05-22 02:55:35,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201355204] [2021-05-22 02:55:35,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:55:35,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:55:35,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:55:35,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:55:35,191 INFO L87 Difference]: Start difference. First operand 2341 states and 5489 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:36,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:55:36,639 INFO L93 Difference]: Finished difference Result 3299 states and 7593 transitions. [2021-05-22 02:55:36,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-22 02:55:36,639 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:55:36,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:55:36,642 INFO L225 Difference]: With dead ends: 3299 [2021-05-22 02:55:36,643 INFO L226 Difference]: Without dead ends: 3247 [2021-05-22 02:55:36,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 1485.2ms TimeCoverageRelationStatistics Valid=669, Invalid=4023, Unknown=0, NotChecked=0, Total=4692 [2021-05-22 02:55:36,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2021-05-22 02:55:36,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 2377. [2021-05-22 02:55:36,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 2376 states have (on average 2.3434343434343434) internal successors, (5568), 2376 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:36,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 5568 transitions. [2021-05-22 02:55:36,686 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 5568 transitions. Word has length 35 [2021-05-22 02:55:36,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:55:36,686 INFO L482 AbstractCegarLoop]: Abstraction has 2377 states and 5568 transitions. [2021-05-22 02:55:36,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:36,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 5568 transitions. [2021-05-22 02:55:36,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:55:36,689 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:55:36,689 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:55:36,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-05-22 02:55:36,890 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:55:36,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:55:36,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1208064305, now seen corresponding path program 62 times [2021-05-22 02:55:36,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:55:36,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443847170] [2021-05-22 02:55:36,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:55:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:55:37,110 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:37,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:55:37,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443847170] [2021-05-22 02:55:37,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443847170] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:37,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203631567] [2021-05-22 02:55:37,111 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 [2021-05-22 02:55:37,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:55:37,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:55:37,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-22 02:55:37,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:55:37,633 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:37,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203631567] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:37,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:55:37,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-05-22 02:55:37,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416503094] [2021-05-22 02:55:37,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:55:37,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:55:37,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:55:37,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:55:37,634 INFO L87 Difference]: Start difference. First operand 2377 states and 5568 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:39,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:55:39,085 INFO L93 Difference]: Finished difference Result 3241 states and 7484 transitions. [2021-05-22 02:55:39,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-22 02:55:39,085 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:55:39,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:55:39,089 INFO L225 Difference]: With dead ends: 3241 [2021-05-22 02:55:39,089 INFO L226 Difference]: Without dead ends: 3193 [2021-05-22 02:55:39,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 1418.4ms TimeCoverageRelationStatistics Valid=571, Invalid=3589, Unknown=0, NotChecked=0, Total=4160 [2021-05-22 02:55:39,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3193 states. [2021-05-22 02:55:39,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3193 to 2387. [2021-05-22 02:55:39,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2386 states have (on average 2.341994970662196) internal successors, (5588), 2386 states have internal predecessors, (5588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:39,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 5588 transitions. [2021-05-22 02:55:39,114 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 5588 transitions. Word has length 35 [2021-05-22 02:55:39,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:55:39,114 INFO L482 AbstractCegarLoop]: Abstraction has 2387 states and 5588 transitions. [2021-05-22 02:55:39,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:39,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 5588 transitions. [2021-05-22 02:55:39,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:55:39,117 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:55:39,117 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:55:39,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable802,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:55:39,318 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:55:39,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:55:39,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1268866609, now seen corresponding path program 63 times [2021-05-22 02:55:39,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:55:39,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471769326] [2021-05-22 02:55:39,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:55:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:55:39,521 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:39,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:55:39,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471769326] [2021-05-22 02:55:39,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471769326] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:39,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940014460] [2021-05-22 02:55:39,521 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 [2021-05-22 02:55:39,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-22 02:55:39,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:55:39,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-22 02:55:39,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:55:40,081 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:40,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940014460] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:40,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:55:40,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-05-22 02:55:40,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342371501] [2021-05-22 02:55:40,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:55:40,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:55:40,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:55:40,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:55:40,082 INFO L87 Difference]: Start difference. First operand 2387 states and 5588 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:41,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:55:41,969 INFO L93 Difference]: Finished difference Result 3451 states and 7906 transitions. [2021-05-22 02:55:41,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-22 02:55:41,970 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:55:41,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:55:41,973 INFO L225 Difference]: With dead ends: 3451 [2021-05-22 02:55:41,973 INFO L226 Difference]: Without dead ends: 3409 [2021-05-22 02:55:41,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 1936.1ms TimeCoverageRelationStatistics Valid=923, Invalid=5083, Unknown=0, NotChecked=0, Total=6006 [2021-05-22 02:55:41,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3409 states. [2021-05-22 02:55:42,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3409 to 2419. [2021-05-22 02:55:42,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2419 states, 2418 states have (on average 2.339950372208437) internal successors, (5658), 2418 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:42,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2419 states to 2419 states and 5658 transitions. [2021-05-22 02:55:42,019 INFO L78 Accepts]: Start accepts. Automaton has 2419 states and 5658 transitions. Word has length 35 [2021-05-22 02:55:42,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:55:42,019 INFO L482 AbstractCegarLoop]: Abstraction has 2419 states and 5658 transitions. [2021-05-22 02:55:42,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:42,019 INFO L276 IsEmpty]: Start isEmpty. Operand 2419 states and 5658 transitions. [2021-05-22 02:55:42,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:55:42,023 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:55:42,023 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:55:42,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable822,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:55:42,245 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:55:42,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:55:42,245 INFO L82 PathProgramCache]: Analyzing trace with hash 2098249707, now seen corresponding path program 64 times [2021-05-22 02:55:42,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:55:42,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545607221] [2021-05-22 02:55:42,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:55:42,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:55:42,463 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:42,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:55:42,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545607221] [2021-05-22 02:55:42,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545607221] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:42,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908175958] [2021-05-22 02:55:42,463 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:55:42,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:55:42,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:55:42,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-22 02:55:42,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:55:43,014 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:43,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908175958] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:43,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:55:43,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-05-22 02:55:43,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707241595] [2021-05-22 02:55:43,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:55:43,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:55:43,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:55:43,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:55:43,016 INFO L87 Difference]: Start difference. First operand 2419 states and 5658 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:44,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:55:44,714 INFO L93 Difference]: Finished difference Result 3327 states and 7665 transitions. [2021-05-22 02:55:44,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-22 02:55:44,714 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:55:44,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:55:44,718 INFO L225 Difference]: With dead ends: 3327 [2021-05-22 02:55:44,718 INFO L226 Difference]: Without dead ends: 3273 [2021-05-22 02:55:44,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 1771.7ms TimeCoverageRelationStatistics Valid=674, Invalid=4156, Unknown=0, NotChecked=0, Total=4830 [2021-05-22 02:55:44,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2021-05-22 02:55:44,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 2423. [2021-05-22 02:55:44,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2423 states, 2422 states have (on average 2.3393889347646573) internal successors, (5666), 2422 states have internal predecessors, (5666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:44,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 5666 transitions. [2021-05-22 02:55:44,750 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 5666 transitions. Word has length 35 [2021-05-22 02:55:44,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:55:44,750 INFO L482 AbstractCegarLoop]: Abstraction has 2423 states and 5666 transitions. [2021-05-22 02:55:44,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:44,751 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 5666 transitions. [2021-05-22 02:55:44,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:55:44,753 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:55:44,753 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:55:44,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable840 [2021-05-22 02:55:44,954 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:55:44,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:55:44,954 INFO L82 PathProgramCache]: Analyzing trace with hash -2135915285, now seen corresponding path program 65 times [2021-05-22 02:55:44,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:55:44,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964303783] [2021-05-22 02:55:44,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:55:44,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:55:45,168 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:45,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:55:45,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964303783] [2021-05-22 02:55:45,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964303783] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:45,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177385433] [2021-05-22 02:55:45,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:55:45,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-22 02:55:45,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:55:45,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-22 02:55:45,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:55:45,771 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:45,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177385433] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:45,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:55:45,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-05-22 02:55:45,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602731191] [2021-05-22 02:55:45,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:55:45,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:55:45,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:55:45,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:55:45,773 INFO L87 Difference]: Start difference. First operand 2423 states and 5666 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:48,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:55:48,032 INFO L93 Difference]: Finished difference Result 3537 states and 8101 transitions. [2021-05-22 02:55:48,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-22 02:55:48,032 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:55:48,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:55:48,036 INFO L225 Difference]: With dead ends: 3537 [2021-05-22 02:55:48,036 INFO L226 Difference]: Without dead ends: 3495 [2021-05-22 02:55:48,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 2319.0ms TimeCoverageRelationStatistics Valid=1079, Invalid=5563, Unknown=0, NotChecked=0, Total=6642 [2021-05-22 02:55:48,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3495 states. [2021-05-22 02:55:48,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3495 to 2421. [2021-05-22 02:55:48,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2421 states, 2420 states have (on average 2.3396694214876033) internal successors, (5662), 2420 states have internal predecessors, (5662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:48,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2421 states to 2421 states and 5662 transitions. [2021-05-22 02:55:48,060 INFO L78 Accepts]: Start accepts. Automaton has 2421 states and 5662 transitions. Word has length 35 [2021-05-22 02:55:48,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:55:48,060 INFO L482 AbstractCegarLoop]: Abstraction has 2421 states and 5662 transitions. [2021-05-22 02:55:48,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:48,060 INFO L276 IsEmpty]: Start isEmpty. Operand 2421 states and 5662 transitions. [2021-05-22 02:55:48,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:55:48,062 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:55:48,062 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:55:48,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable858 [2021-05-22 02:55:48,262 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:55:48,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:55:48,263 INFO L82 PathProgramCache]: Analyzing trace with hash -354380241, now seen corresponding path program 66 times [2021-05-22 02:55:48,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:55:48,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409339815] [2021-05-22 02:55:48,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:55:48,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:55:48,451 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:48,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:55:48,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409339815] [2021-05-22 02:55:48,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409339815] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:48,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584197884] [2021-05-22 02:55:48,451 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 [2021-05-22 02:55:48,475 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 02:55:48,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:55:48,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-22 02:55:48,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:55:49,052 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:49,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584197884] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:49,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:55:49,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-05-22 02:55:49,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844154894] [2021-05-22 02:55:49,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:55:49,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:55:49,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:55:49,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:55:49,053 INFO L87 Difference]: Start difference. First operand 2421 states and 5662 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:52,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:55:52,060 INFO L93 Difference]: Finished difference Result 3760 states and 8574 transitions. [2021-05-22 02:55:52,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-22 02:55:52,061 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:55:52,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:55:52,065 INFO L225 Difference]: With dead ends: 3760 [2021-05-22 02:55:52,065 INFO L226 Difference]: Without dead ends: 3718 [2021-05-22 02:55:52,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 2845.0ms TimeCoverageRelationStatistics Valid=1483, Invalid=8219, Unknown=0, NotChecked=0, Total=9702 [2021-05-22 02:55:52,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3718 states. [2021-05-22 02:55:52,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3718 to 2453. [2021-05-22 02:55:52,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 2452 states have (on average 2.33931484502447) internal successors, (5736), 2452 states have internal predecessors, (5736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:52,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 5736 transitions. [2021-05-22 02:55:52,105 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 5736 transitions. Word has length 35 [2021-05-22 02:55:52,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:55:52,105 INFO L482 AbstractCegarLoop]: Abstraction has 2453 states and 5736 transitions. [2021-05-22 02:55:52,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:52,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 5736 transitions. [2021-05-22 02:55:52,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:55:52,108 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:55:52,108 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:55:52,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable879,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:55:52,321 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:55:52,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:55:52,321 INFO L82 PathProgramCache]: Analyzing trace with hash -643028877, now seen corresponding path program 67 times [2021-05-22 02:55:52,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:55:52,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812460893] [2021-05-22 02:55:52,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:55:52,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:55:52,514 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:52,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:55:52,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812460893] [2021-05-22 02:55:52,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812460893] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:52,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844860498] [2021-05-22 02:55:52,515 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 [2021-05-22 02:55:52,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:55:52,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-22 02:55:52,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:55:53,140 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:53,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844860498] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:53,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:55:53,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-05-22 02:55:53,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324335600] [2021-05-22 02:55:53,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:55:53,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:55:53,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:55:53,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:55:53,141 INFO L87 Difference]: Start difference. First operand 2453 states and 5736 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:56,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:55:56,676 INFO L93 Difference]: Finished difference Result 4092 states and 9200 transitions. [2021-05-22 02:55:56,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-22 02:55:56,677 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:55:56,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:55:56,681 INFO L225 Difference]: With dead ends: 4092 [2021-05-22 02:55:56,681 INFO L226 Difference]: Without dead ends: 4052 [2021-05-22 02:55:56,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4119 ImplicationChecksByTransitivity, 3335.9ms TimeCoverageRelationStatistics Valid=1844, Invalid=10146, Unknown=0, NotChecked=0, Total=11990 [2021-05-22 02:55:56,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4052 states. [2021-05-22 02:55:56,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4052 to 2489. [2021-05-22 02:55:56,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2489 states, 2488 states have (on average 2.3392282958199355) internal successors, (5820), 2488 states have internal predecessors, (5820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:56,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2489 states to 2489 states and 5820 transitions. [2021-05-22 02:55:56,708 INFO L78 Accepts]: Start accepts. Automaton has 2489 states and 5820 transitions. Word has length 35 [2021-05-22 02:55:56,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:55:56,708 INFO L482 AbstractCegarLoop]: Abstraction has 2489 states and 5820 transitions. [2021-05-22 02:55:56,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:55:56,709 INFO L276 IsEmpty]: Start isEmpty. Operand 2489 states and 5820 transitions. [2021-05-22 02:55:56,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:55:56,712 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:55:56,712 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:55:56,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable898,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:55:56,913 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:55:56,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:55:56,913 INFO L82 PathProgramCache]: Analyzing trace with hash 268401591, now seen corresponding path program 68 times [2021-05-22 02:55:56,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:55:56,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930472573] [2021-05-22 02:55:56,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:55:56,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:55:57,149 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:57,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:55:57,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930472573] [2021-05-22 02:55:57,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930472573] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:57,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871514075] [2021-05-22 02:55:57,150 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 [2021-05-22 02:55:57,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:55:57,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:55:57,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-22 02:55:57,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:55:57,699 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:55:57,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871514075] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:55:57,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:55:57,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-05-22 02:55:57,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797923315] [2021-05-22 02:55:57,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:55:57,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:55:57,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:55:57,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:55:57,700 INFO L87 Difference]: Start difference. First operand 2489 states and 5820 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:01,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:56:01,289 INFO L93 Difference]: Finished difference Result 4809 states and 10645 transitions. [2021-05-22 02:56:01,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-22 02:56:01,290 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:56:01,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:56:01,294 INFO L225 Difference]: With dead ends: 4809 [2021-05-22 02:56:01,294 INFO L226 Difference]: Without dead ends: 4769 [2021-05-22 02:56:01,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3487 ImplicationChecksByTransitivity, 3199.1ms TimeCoverageRelationStatistics Valid=1613, Invalid=9099, Unknown=0, NotChecked=0, Total=10712 [2021-05-22 02:56:01,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4769 states. [2021-05-22 02:56:01,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4769 to 2561. [2021-05-22 02:56:01,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 2560 states have (on average 2.346875) internal successors, (6008), 2560 states have internal predecessors, (6008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:01,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 6008 transitions. [2021-05-22 02:56:01,324 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 6008 transitions. Word has length 35 [2021-05-22 02:56:01,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:56:01,324 INFO L482 AbstractCegarLoop]: Abstraction has 2561 states and 6008 transitions. [2021-05-22 02:56:01,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:01,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 6008 transitions. [2021-05-22 02:56:01,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:56:01,326 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:56:01,326 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:56:01,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable922,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:56:01,527 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:56:01,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:56:01,527 INFO L82 PathProgramCache]: Analyzing trace with hash -461964319, now seen corresponding path program 69 times [2021-05-22 02:56:01,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:56:01,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836247712] [2021-05-22 02:56:01,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:56:01,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:01,683 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:01,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:56:01,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836247712] [2021-05-22 02:56:01,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836247712] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:01,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621613086] [2021-05-22 02:56:01,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:56:01,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-22 02:56:01,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:56:01,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:56:01,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:56:02,069 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:56:02,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621613086] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:02,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:56:02,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-05-22 02:56:02,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762983299] [2021-05-22 02:56:02,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-22 02:56:02,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:56:02,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-22 02:56:02,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:56:02,071 INFO L87 Difference]: Start difference. First operand 2561 states and 6008 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:03,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:56:03,425 INFO L93 Difference]: Finished difference Result 3689 states and 8571 transitions. [2021-05-22 02:56:03,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-22 02:56:03,425 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:56:03,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:56:03,428 INFO L225 Difference]: With dead ends: 3689 [2021-05-22 02:56:03,428 INFO L226 Difference]: Without dead ends: 3687 [2021-05-22 02:56:03,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 1252.7ms TimeCoverageRelationStatistics Valid=607, Invalid=3299, Unknown=0, NotChecked=0, Total=3906 [2021-05-22 02:56:03,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3687 states. [2021-05-22 02:56:03,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3687 to 2760. [2021-05-22 02:56:03,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2760 states, 2759 states have (on average 2.3599130119608556) internal successors, (6511), 2759 states have internal predecessors, (6511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:03,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2760 states to 2760 states and 6511 transitions. [2021-05-22 02:56:03,466 INFO L78 Accepts]: Start accepts. Automaton has 2760 states and 6511 transitions. Word has length 35 [2021-05-22 02:56:03,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:56:03,466 INFO L482 AbstractCegarLoop]: Abstraction has 2760 states and 6511 transitions. [2021-05-22 02:56:03,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:03,467 INFO L276 IsEmpty]: Start isEmpty. Operand 2760 states and 6511 transitions. [2021-05-22 02:56:03,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:56:03,469 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:56:03,469 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:56:03,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable940,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:56:03,670 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:56:03,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:56:03,670 INFO L82 PathProgramCache]: Analyzing trace with hash 2016394933, now seen corresponding path program 70 times [2021-05-22 02:56:03,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:56:03,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763078937] [2021-05-22 02:56:03,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:56:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:04,001 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:04,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:56:04,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763078937] [2021-05-22 02:56:04,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763078937] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:04,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256134555] [2021-05-22 02:56:04,002 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 [2021-05-22 02:56:04,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:56:04,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:56:04,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-22 02:56:04,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:56:04,553 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:04,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256134555] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:04,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:56:04,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-05-22 02:56:04,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920448257] [2021-05-22 02:56:04,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:56:04,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:56:04,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:56:04,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:56:04,554 INFO L87 Difference]: Start difference. First operand 2760 states and 6511 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:07,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:56:07,840 INFO L93 Difference]: Finished difference Result 3976 states and 9161 transitions. [2021-05-22 02:56:07,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-22 02:56:07,840 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:56:07,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:56:07,844 INFO L225 Difference]: With dead ends: 3976 [2021-05-22 02:56:07,844 INFO L226 Difference]: Without dead ends: 3916 [2021-05-22 02:56:07,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3668 ImplicationChecksByTransitivity, 3142.9ms TimeCoverageRelationStatistics Valid=1313, Invalid=9193, Unknown=0, NotChecked=0, Total=10506 [2021-05-22 02:56:07,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3916 states. [2021-05-22 02:56:07,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3916 to 2774. [2021-05-22 02:56:07,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2774 states, 2773 states have (on average 2.3609808871258564) internal successors, (6547), 2773 states have internal predecessors, (6547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:07,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2774 states to 2774 states and 6547 transitions. [2021-05-22 02:56:07,879 INFO L78 Accepts]: Start accepts. Automaton has 2774 states and 6547 transitions. Word has length 35 [2021-05-22 02:56:07,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:56:07,879 INFO L482 AbstractCegarLoop]: Abstraction has 2774 states and 6547 transitions. [2021-05-22 02:56:07,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:07,879 INFO L276 IsEmpty]: Start isEmpty. Operand 2774 states and 6547 transitions. [2021-05-22 02:56:07,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:56:07,881 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:56:07,881 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:56:08,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable956 [2021-05-22 02:56:08,082 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:56:08,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:56:08,082 INFO L82 PathProgramCache]: Analyzing trace with hash 2077197237, now seen corresponding path program 71 times [2021-05-22 02:56:08,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:56:08,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438154781] [2021-05-22 02:56:08,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:56:08,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:08,328 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:08,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:56:08,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438154781] [2021-05-22 02:56:08,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438154781] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:08,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291372877] [2021-05-22 02:56:08,329 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 [2021-05-22 02:56:08,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-22 02:56:08,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:56:08,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-22 02:56:08,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:56:08,906 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:08,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291372877] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:08,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:56:08,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-05-22 02:56:08,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490836381] [2021-05-22 02:56:08,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:56:08,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:56:08,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:56:08,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:56:08,907 INFO L87 Difference]: Start difference. First operand 2774 states and 6547 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:11,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:56:11,991 INFO L93 Difference]: Finished difference Result 4131 states and 9524 transitions. [2021-05-22 02:56:11,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-22 02:56:11,991 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:56:11,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:56:11,995 INFO L225 Difference]: With dead ends: 4131 [2021-05-22 02:56:11,995 INFO L226 Difference]: Without dead ends: 4089 [2021-05-22 02:56:11,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3041 ImplicationChecksByTransitivity, 2956.2ms TimeCoverageRelationStatistics Valid=1423, Invalid=7889, Unknown=0, NotChecked=0, Total=9312 [2021-05-22 02:56:11,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4089 states. [2021-05-22 02:56:12,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4089 to 2805. [2021-05-22 02:56:12,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2805 states, 2804 states have (on average 2.361626248216833) internal successors, (6622), 2804 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:12,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2805 states to 2805 states and 6622 transitions. [2021-05-22 02:56:12,028 INFO L78 Accepts]: Start accepts. Automaton has 2805 states and 6622 transitions. Word has length 35 [2021-05-22 02:56:12,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:56:12,028 INFO L482 AbstractCegarLoop]: Abstraction has 2805 states and 6622 transitions. [2021-05-22 02:56:12,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:12,028 INFO L276 IsEmpty]: Start isEmpty. Operand 2805 states and 6622 transitions. [2021-05-22 02:56:12,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:56:12,031 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:56:12,031 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:56:12,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable977,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:56:12,231 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:56:12,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:56:12,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1617056775, now seen corresponding path program 72 times [2021-05-22 02:56:12,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:56:12,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685519858] [2021-05-22 02:56:12,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:56:12,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:12,402 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:12,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:56:12,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685519858] [2021-05-22 02:56:12,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685519858] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:12,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253249572] [2021-05-22 02:56:12,403 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 [2021-05-22 02:56:12,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 02:56:12,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:56:12,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:56:12,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:56:12,805 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:12,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253249572] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:12,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:56:12,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-05-22 02:56:12,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036052813] [2021-05-22 02:56:12,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-22 02:56:12,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:56:12,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-22 02:56:12,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:56:12,806 INFO L87 Difference]: Start difference. First operand 2805 states and 6622 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:14,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:56:14,422 INFO L93 Difference]: Finished difference Result 3500 states and 8075 transitions. [2021-05-22 02:56:14,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-22 02:56:14,422 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:56:14,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:56:14,425 INFO L225 Difference]: With dead ends: 3500 [2021-05-22 02:56:14,425 INFO L226 Difference]: Without dead ends: 3500 [2021-05-22 02:56:14,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 1597.4ms TimeCoverageRelationStatistics Valid=849, Invalid=3981, Unknown=0, NotChecked=0, Total=4830 [2021-05-22 02:56:14,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3500 states. [2021-05-22 02:56:14,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3500 to 2817. [2021-05-22 02:56:14,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2817 states, 2816 states have (on average 2.3597301136363638) internal successors, (6645), 2816 states have internal predecessors, (6645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:14,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2817 states to 2817 states and 6645 transitions. [2021-05-22 02:56:14,451 INFO L78 Accepts]: Start accepts. Automaton has 2817 states and 6645 transitions. Word has length 35 [2021-05-22 02:56:14,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:56:14,451 INFO L482 AbstractCegarLoop]: Abstraction has 2817 states and 6645 transitions. [2021-05-22 02:56:14,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:14,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2817 states and 6645 transitions. [2021-05-22 02:56:14,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:56:14,453 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:56:14,454 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:56:14,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable998 [2021-05-22 02:56:14,657 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:56:14,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:56:14,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1905705411, now seen corresponding path program 73 times [2021-05-22 02:56:14,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:56:14,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788849057] [2021-05-22 02:56:14,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:56:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:14,821 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:14,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:56:14,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788849057] [2021-05-22 02:56:14,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788849057] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:14,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584046953] [2021-05-22 02:56:14,822 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 [2021-05-22 02:56:14,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:14,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:56:14,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:56:15,250 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:15,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584046953] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:15,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:56:15,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-05-22 02:56:15,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603366375] [2021-05-22 02:56:15,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-22 02:56:15,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:56:15,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-22 02:56:15,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:56:15,251 INFO L87 Difference]: Start difference. First operand 2817 states and 6645 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:17,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:56:17,082 INFO L93 Difference]: Finished difference Result 3661 states and 8422 transitions. [2021-05-22 02:56:17,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-22 02:56:17,083 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:56:17,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:56:17,087 INFO L225 Difference]: With dead ends: 3661 [2021-05-22 02:56:17,087 INFO L226 Difference]: Without dead ends: 3661 [2021-05-22 02:56:17,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 1759.6ms TimeCoverageRelationStatistics Valid=939, Invalid=4463, Unknown=0, NotChecked=0, Total=5402 [2021-05-22 02:56:17,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3661 states. [2021-05-22 02:56:17,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3661 to 2821. [2021-05-22 02:56:17,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2821 states, 2820 states have (on average 2.3613475177304966) internal successors, (6659), 2820 states have internal predecessors, (6659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:17,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2821 states to 2821 states and 6659 transitions. [2021-05-22 02:56:17,119 INFO L78 Accepts]: Start accepts. Automaton has 2821 states and 6659 transitions. Word has length 35 [2021-05-22 02:56:17,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:56:17,119 INFO L482 AbstractCegarLoop]: Abstraction has 2821 states and 6659 transitions. [2021-05-22 02:56:17,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:17,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2821 states and 6659 transitions. [2021-05-22 02:56:17,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:56:17,122 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:56:17,122 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:56:17,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1014,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:56:17,322 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:56:17,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:56:17,323 INFO L82 PathProgramCache]: Analyzing trace with hash -994274943, now seen corresponding path program 74 times [2021-05-22 02:56:17,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:56:17,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658528599] [2021-05-22 02:56:17,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:56:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:17,486 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:17,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:56:17,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658528599] [2021-05-22 02:56:17,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658528599] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:17,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422235047] [2021-05-22 02:56:17,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:56:17,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:56:17,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:56:17,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:56:17,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:56:17,878 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:17,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422235047] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:17,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:56:17,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-05-22 02:56:17,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011836563] [2021-05-22 02:56:17,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-22 02:56:17,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:56:17,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-22 02:56:17,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:56:17,879 INFO L87 Difference]: Start difference. First operand 2821 states and 6659 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:19,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:56:19,589 INFO L93 Difference]: Finished difference Result 4400 states and 10185 transitions. [2021-05-22 02:56:19,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-22 02:56:19,590 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:56:19,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:56:19,594 INFO L225 Difference]: With dead ends: 4400 [2021-05-22 02:56:19,594 INFO L226 Difference]: Without dead ends: 4400 [2021-05-22 02:56:19,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 1646.5ms TimeCoverageRelationStatistics Valid=887, Invalid=4225, Unknown=0, NotChecked=0, Total=5112 [2021-05-22 02:56:19,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4400 states. [2021-05-22 02:56:19,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4400 to 2832. [2021-05-22 02:56:19,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2832 states, 2831 states have (on average 2.362062875309078) internal successors, (6687), 2831 states have internal predecessors, (6687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:19,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 6687 transitions. [2021-05-22 02:56:19,623 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 6687 transitions. Word has length 35 [2021-05-22 02:56:19,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:56:19,623 INFO L482 AbstractCegarLoop]: Abstraction has 2832 states and 6687 transitions. [2021-05-22 02:56:19,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:19,623 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 6687 transitions. [2021-05-22 02:56:19,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:56:19,625 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:56:19,625 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:56:19,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1033 [2021-05-22 02:56:19,826 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:56:19,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:56:19,826 INFO L82 PathProgramCache]: Analyzing trace with hash -22956363, now seen corresponding path program 75 times [2021-05-22 02:56:19,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:56:19,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251884341] [2021-05-22 02:56:19,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:56:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:20,042 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:20,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:56:20,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251884341] [2021-05-22 02:56:20,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251884341] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:20,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054085663] [2021-05-22 02:56:20,043 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 [2021-05-22 02:56:20,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-22 02:56:20,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:56:20,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-22 02:56:20,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:56:20,590 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:20,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054085663] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:20,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:56:20,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-05-22 02:56:20,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143201927] [2021-05-22 02:56:20,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-22 02:56:20,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:56:20,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-22 02:56:20,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:56:20,591 INFO L87 Difference]: Start difference. First operand 2832 states and 6687 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:23,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:56:23,375 INFO L93 Difference]: Finished difference Result 4002 states and 9232 transitions. [2021-05-22 02:56:23,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-22 02:56:23,375 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:56:23,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:56:23,378 INFO L225 Difference]: With dead ends: 4002 [2021-05-22 02:56:23,378 INFO L226 Difference]: Without dead ends: 3948 [2021-05-22 02:56:23,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2853 ImplicationChecksByTransitivity, 2626.7ms TimeCoverageRelationStatistics Valid=1083, Invalid=7473, Unknown=0, NotChecked=0, Total=8556 [2021-05-22 02:56:23,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2021-05-22 02:56:23,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 2856. [2021-05-22 02:56:23,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2856 states, 2855 states have (on average 2.360420315236427) internal successors, (6739), 2855 states have internal predecessors, (6739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:23,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2856 states to 2856 states and 6739 transitions. [2021-05-22 02:56:23,405 INFO L78 Accepts]: Start accepts. Automaton has 2856 states and 6739 transitions. Word has length 35 [2021-05-22 02:56:23,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:56:23,405 INFO L482 AbstractCegarLoop]: Abstraction has 2856 states and 6739 transitions. [2021-05-22 02:56:23,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:23,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2856 states and 6739 transitions. [2021-05-22 02:56:23,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:56:23,407 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:56:23,407 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:56:23,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1052,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:56:23,608 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:56:23,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:56:23,608 INFO L82 PathProgramCache]: Analyzing trace with hash -44282443, now seen corresponding path program 76 times [2021-05-22 02:56:23,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:56:23,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083782055] [2021-05-22 02:56:23,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:56:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:23,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:56:23,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083782055] [2021-05-22 02:56:23,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083782055] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:23,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384940293] [2021-05-22 02:56:23,825 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 [2021-05-22 02:56:23,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:56:23,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:56:23,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-22 02:56:23,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:56:24,342 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:24,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384940293] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:24,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:56:24,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-05-22 02:56:24,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264530702] [2021-05-22 02:56:24,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-22 02:56:24,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:56:24,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-22 02:56:24,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:56:24,344 INFO L87 Difference]: Start difference. First operand 2856 states and 6739 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:26,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:56:26,779 INFO L93 Difference]: Finished difference Result 3842 states and 8918 transitions. [2021-05-22 02:56:26,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-22 02:56:26,779 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:56:26,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:56:26,783 INFO L225 Difference]: With dead ends: 3842 [2021-05-22 02:56:26,783 INFO L226 Difference]: Without dead ends: 3770 [2021-05-22 02:56:26,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1845 ImplicationChecksByTransitivity, 2406.0ms TimeCoverageRelationStatistics Valid=887, Invalid=5119, Unknown=0, NotChecked=0, Total=6006 [2021-05-22 02:56:26,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3770 states. [2021-05-22 02:56:26,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3770 to 2860. [2021-05-22 02:56:26,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2860 states, 2859 states have (on average 2.3585169639734174) internal successors, (6743), 2859 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:26,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2860 states to 2860 states and 6743 transitions. [2021-05-22 02:56:26,817 INFO L78 Accepts]: Start accepts. Automaton has 2860 states and 6743 transitions. Word has length 35 [2021-05-22 02:56:26,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:56:26,817 INFO L482 AbstractCegarLoop]: Abstraction has 2860 states and 6743 transitions. [2021-05-22 02:56:26,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:26,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2860 states and 6743 transitions. [2021-05-22 02:56:26,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:56:26,820 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:56:26,820 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:56:27,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1071,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:56:27,020 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:56:27,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:56:27,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1833180341, now seen corresponding path program 77 times [2021-05-22 02:56:27,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:56:27,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256254577] [2021-05-22 02:56:27,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:56:27,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:27,171 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:27,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:56:27,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256254577] [2021-05-22 02:56:27,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256254577] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:27,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653385658] [2021-05-22 02:56:27,171 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 [2021-05-22 02:56:27,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-22 02:56:27,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:56:27,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:56:27,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:56:27,582 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:27,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653385658] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:27,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:56:27,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-05-22 02:56:27,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764018078] [2021-05-22 02:56:27,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-22 02:56:27,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:56:27,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-22 02:56:27,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:56:27,583 INFO L87 Difference]: Start difference. First operand 2860 states and 6743 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:29,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:56:29,205 INFO L93 Difference]: Finished difference Result 5084 states and 11781 transitions. [2021-05-22 02:56:29,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-22 02:56:29,205 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:56:29,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:56:29,210 INFO L225 Difference]: With dead ends: 5084 [2021-05-22 02:56:29,210 INFO L226 Difference]: Without dead ends: 5084 [2021-05-22 02:56:29,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 1512.8ms TimeCoverageRelationStatistics Valid=771, Invalid=3651, Unknown=0, NotChecked=0, Total=4422 [2021-05-22 02:56:29,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5084 states. [2021-05-22 02:56:29,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5084 to 3004. [2021-05-22 02:56:29,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3004 states, 3003 states have (on average 2.3533133533133532) internal successors, (7067), 3003 states have internal predecessors, (7067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:29,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3004 states to 3004 states and 7067 transitions. [2021-05-22 02:56:29,244 INFO L78 Accepts]: Start accepts. Automaton has 3004 states and 7067 transitions. Word has length 35 [2021-05-22 02:56:29,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:56:29,245 INFO L482 AbstractCegarLoop]: Abstraction has 3004 states and 7067 transitions. [2021-05-22 02:56:29,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:29,245 INFO L276 IsEmpty]: Start isEmpty. Operand 3004 states and 7067 transitions. [2021-05-22 02:56:29,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:56:29,247 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:56:29,247 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:56:29,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1093 [2021-05-22 02:56:29,448 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:56:29,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:56:29,448 INFO L82 PathProgramCache]: Analyzing trace with hash 846119997, now seen corresponding path program 78 times [2021-05-22 02:56:29,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:56:29,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998082349] [2021-05-22 02:56:29,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:56:29,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:29,583 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:56:29,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:56:29,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998082349] [2021-05-22 02:56:29,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998082349] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:29,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827591818] [2021-05-22 02:56:29,584 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 [2021-05-22 02:56:29,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-22 02:56:29,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:56:29,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-22 02:56:29,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:56:29,763 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:56:29,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827591818] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:29,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:56:29,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-05-22 02:56:29,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065475514] [2021-05-22 02:56:29,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:56:29,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:56:29,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:56:29,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:56:29,764 INFO L87 Difference]: Start difference. First operand 3004 states and 7067 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:30,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:56:30,731 INFO L93 Difference]: Finished difference Result 4189 states and 9617 transitions. [2021-05-22 02:56:30,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-22 02:56:30,731 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:56:30,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:56:30,735 INFO L225 Difference]: With dead ends: 4189 [2021-05-22 02:56:30,735 INFO L226 Difference]: Without dead ends: 4153 [2021-05-22 02:56:30,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 820.2ms TimeCoverageRelationStatistics Valid=521, Invalid=2341, Unknown=0, NotChecked=0, Total=2862 [2021-05-22 02:56:30,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4153 states. [2021-05-22 02:56:30,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4153 to 2873. [2021-05-22 02:56:30,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2873 states, 2872 states have (on average 2.3467966573816157) internal successors, (6740), 2872 states have internal predecessors, (6740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:30,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2873 states to 2873 states and 6740 transitions. [2021-05-22 02:56:30,768 INFO L78 Accepts]: Start accepts. Automaton has 2873 states and 6740 transitions. Word has length 35 [2021-05-22 02:56:30,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:56:30,768 INFO L482 AbstractCegarLoop]: Abstraction has 2873 states and 6740 transitions. [2021-05-22 02:56:30,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:30,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2873 states and 6740 transitions. [2021-05-22 02:56:30,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:56:30,771 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:56:30,771 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:56:30,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-05-22 02:56:30,989 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:56:30,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:56:30,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1809722061, now seen corresponding path program 79 times [2021-05-22 02:56:30,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:56:30,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394032208] [2021-05-22 02:56:30,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:56:30,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:31,181 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:31,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:56:31,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394032208] [2021-05-22 02:56:31,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394032208] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:31,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713525762] [2021-05-22 02:56:31,181 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 [2021-05-22 02:56:31,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:31,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-22 02:56:31,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:56:31,793 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:31,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713525762] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:31,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:56:31,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-05-22 02:56:31,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646635304] [2021-05-22 02:56:31,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-22 02:56:31,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:56:31,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-22 02:56:31,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:56:31,795 INFO L87 Difference]: Start difference. First operand 2873 states and 6740 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:35,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:56:35,115 INFO L93 Difference]: Finished difference Result 4270 states and 9783 transitions. [2021-05-22 02:56:35,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-22 02:56:35,116 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:56:35,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:56:35,120 INFO L225 Difference]: With dead ends: 4270 [2021-05-22 02:56:35,120 INFO L226 Difference]: Without dead ends: 4222 [2021-05-22 02:56:35,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3551 ImplicationChecksByTransitivity, 3232.7ms TimeCoverageRelationStatistics Valid=1575, Invalid=8727, Unknown=0, NotChecked=0, Total=10302 [2021-05-22 02:56:35,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4222 states. [2021-05-22 02:56:35,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4222 to 2879. [2021-05-22 02:56:35,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 2.3467685892981236) internal successors, (6754), 2878 states have internal predecessors, (6754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:35,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 6754 transitions. [2021-05-22 02:56:35,161 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 6754 transitions. Word has length 35 [2021-05-22 02:56:35,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:56:35,161 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 6754 transitions. [2021-05-22 02:56:35,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:35,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 6754 transitions. [2021-05-22 02:56:35,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:56:35,164 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:56:35,164 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:56:35,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1116,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:56:35,381 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:56:35,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:56:35,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1249714381, now seen corresponding path program 80 times [2021-05-22 02:56:35,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:56:35,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268394229] [2021-05-22 02:56:35,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:56:35,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:35,583 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:56:35,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:56:35,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268394229] [2021-05-22 02:56:35,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268394229] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:35,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026913279] [2021-05-22 02:56:35,583 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 [2021-05-22 02:56:35,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:56:35,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:56:35,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-22 02:56:35,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:56:36,107 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:36,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026913279] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:36,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:56:36,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-05-22 02:56:36,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88391460] [2021-05-22 02:56:36,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-22 02:56:36,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:56:36,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-22 02:56:36,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:56:36,108 INFO L87 Difference]: Start difference. First operand 2879 states and 6754 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:38,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:56:38,787 INFO L93 Difference]: Finished difference Result 5077 states and 11546 transitions. [2021-05-22 02:56:38,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-22 02:56:38,787 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:56:38,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:56:38,792 INFO L225 Difference]: With dead ends: 5077 [2021-05-22 02:56:38,792 INFO L226 Difference]: Without dead ends: 4993 [2021-05-22 02:56:38,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2361 ImplicationChecksByTransitivity, 2607.8ms TimeCoverageRelationStatistics Valid=1052, Invalid=6258, Unknown=0, NotChecked=0, Total=7310 [2021-05-22 02:56:38,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4993 states. [2021-05-22 02:56:38,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4993 to 3061. [2021-05-22 02:56:38,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3061 states, 3060 states have (on average 2.3532679738562092) internal successors, (7201), 3060 states have internal predecessors, (7201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:38,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3061 states to 3061 states and 7201 transitions. [2021-05-22 02:56:38,829 INFO L78 Accepts]: Start accepts. Automaton has 3061 states and 7201 transitions. Word has length 35 [2021-05-22 02:56:38,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:56:38,829 INFO L482 AbstractCegarLoop]: Abstraction has 3061 states and 7201 transitions. [2021-05-22 02:56:38,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:38,830 INFO L276 IsEmpty]: Start isEmpty. Operand 3061 states and 7201 transitions. [2021-05-22 02:56:38,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:56:38,832 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:56:38,832 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:56:39,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1136 [2021-05-22 02:56:39,032 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:56:39,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:56:39,033 INFO L82 PathProgramCache]: Analyzing trace with hash -366524553, now seen corresponding path program 81 times [2021-05-22 02:56:39,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:56:39,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796298914] [2021-05-22 02:56:39,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:56:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:39,216 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:39,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:56:39,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796298914] [2021-05-22 02:56:39,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796298914] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:39,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15995988] [2021-05-22 02:56:39,217 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 [2021-05-22 02:56:39,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-22 02:56:39,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:56:39,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-22 02:56:39,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:56:39,795 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:39,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15995988] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:39,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:56:39,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-05-22 02:56:39,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354996180] [2021-05-22 02:56:39,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-22 02:56:39,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:56:39,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-22 02:56:39,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:56:39,796 INFO L87 Difference]: Start difference. First operand 3061 states and 7201 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:42,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:56:42,975 INFO L93 Difference]: Finished difference Result 5205 states and 11840 transitions. [2021-05-22 02:56:42,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-22 02:56:42,975 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:56:42,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:56:42,981 INFO L225 Difference]: With dead ends: 5205 [2021-05-22 02:56:42,981 INFO L226 Difference]: Without dead ends: 5157 [2021-05-22 02:56:42,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2893 ImplicationChecksByTransitivity, 3002.3ms TimeCoverageRelationStatistics Valid=1325, Invalid=7417, Unknown=0, NotChecked=0, Total=8742 [2021-05-22 02:56:42,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5157 states. [2021-05-22 02:56:43,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5157 to 3104. [2021-05-22 02:56:43,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3104 states, 3103 states have (on average 2.350306155333548) internal successors, (7293), 3103 states have internal predecessors, (7293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:43,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 7293 transitions. [2021-05-22 02:56:43,038 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 7293 transitions. Word has length 35 [2021-05-22 02:56:43,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:56:43,038 INFO L482 AbstractCegarLoop]: Abstraction has 3104 states and 7293 transitions. [2021-05-22 02:56:43,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:43,038 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 7293 transitions. [2021-05-22 02:56:43,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:56:43,042 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:56:43,042 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:56:43,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1154 [2021-05-22 02:56:43,265 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:56:43,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:56:43,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1433047865, now seen corresponding path program 82 times [2021-05-22 02:56:43,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:56:43,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779059157] [2021-05-22 02:56:43,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:56:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:43,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:56:43,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779059157] [2021-05-22 02:56:43,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779059157] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:43,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672868404] [2021-05-22 02:56:43,534 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 [2021-05-22 02:56:43,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:56:43,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:56:43,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-22 02:56:43,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:56:44,115 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:44,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672868404] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:44,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:56:44,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-05-22 02:56:44,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850560425] [2021-05-22 02:56:44,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:56:44,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:56:44,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:56:44,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:56:44,116 INFO L87 Difference]: Start difference. First operand 3104 states and 7293 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:48,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:56:48,367 INFO L93 Difference]: Finished difference Result 4625 states and 10559 transitions. [2021-05-22 02:56:48,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-22 02:56:48,368 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:56:48,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:56:48,371 INFO L225 Difference]: With dead ends: 4625 [2021-05-22 02:56:48,371 INFO L226 Difference]: Without dead ends: 4559 [2021-05-22 02:56:48,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5744 ImplicationChecksByTransitivity, 4058.5ms TimeCoverageRelationStatistics Valid=2007, Invalid=13493, Unknown=0, NotChecked=0, Total=15500 [2021-05-22 02:56:48,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4559 states. [2021-05-22 02:56:48,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4559 to 3124. [2021-05-22 02:56:48,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3124 states, 3123 states have (on average 2.3519052193403778) internal successors, (7345), 3123 states have internal predecessors, (7345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:48,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3124 states to 3124 states and 7345 transitions. [2021-05-22 02:56:48,403 INFO L78 Accepts]: Start accepts. Automaton has 3124 states and 7345 transitions. Word has length 35 [2021-05-22 02:56:48,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:56:48,403 INFO L482 AbstractCegarLoop]: Abstraction has 3124 states and 7345 transitions. [2021-05-22 02:56:48,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:48,404 INFO L276 IsEmpty]: Start isEmpty. Operand 3124 states and 7345 transitions. [2021-05-22 02:56:48,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:56:48,406 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:56:48,406 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:56:48,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1174,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:56:48,607 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:56:48,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:56:48,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1902771911, now seen corresponding path program 83 times [2021-05-22 02:56:48,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:56:48,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276653061] [2021-05-22 02:56:48,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:56:48,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:48,870 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:48,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:56:48,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276653061] [2021-05-22 02:56:48,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276653061] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:48,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903889122] [2021-05-22 02:56:48,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:56:48,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-22 02:56:48,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:56:48,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-22 02:56:48,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:56:49,433 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:49,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903889122] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:49,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:56:49,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-05-22 02:56:49,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331380518] [2021-05-22 02:56:49,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:56:49,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:56:49,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:56:49,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:56:49,434 INFO L87 Difference]: Start difference. First operand 3124 states and 7345 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:53,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:56:53,035 INFO L93 Difference]: Finished difference Result 4367 states and 10055 transitions. [2021-05-22 02:56:53,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-22 02:56:53,036 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:56:53,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:56:53,040 INFO L225 Difference]: With dead ends: 4367 [2021-05-22 02:56:53,040 INFO L226 Difference]: Without dead ends: 4331 [2021-05-22 02:56:53,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3566 ImplicationChecksByTransitivity, 3481.5ms TimeCoverageRelationStatistics Valid=1380, Invalid=9126, Unknown=0, NotChecked=0, Total=10506 [2021-05-22 02:56:53,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4331 states. [2021-05-22 02:56:53,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4331 to 3128. [2021-05-22 02:56:53,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3128 states, 3127 states have (on average 2.351455068755996) internal successors, (7353), 3127 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:53,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 7353 transitions. [2021-05-22 02:56:53,074 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 7353 transitions. Word has length 35 [2021-05-22 02:56:53,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:56:53,074 INFO L482 AbstractCegarLoop]: Abstraction has 3128 states and 7353 transitions. [2021-05-22 02:56:53,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:53,075 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 7353 transitions. [2021-05-22 02:56:53,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:56:53,077 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:56:53,077 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:56:53,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1195,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:56:53,278 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:56:53,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:56:53,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1493850169, now seen corresponding path program 84 times [2021-05-22 02:56:53,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:56:53,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022214725] [2021-05-22 02:56:53,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:56:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:53,516 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:53,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:56:53,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022214725] [2021-05-22 02:56:53,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022214725] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:53,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236031250] [2021-05-22 02:56:53,517 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 [2021-05-22 02:56:53,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 02:56:53,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:56:53,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-22 02:56:53,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:56:54,107 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:54,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236031250] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:54,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:56:54,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-05-22 02:56:54,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783046455] [2021-05-22 02:56:54,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:56:54,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:56:54,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:56:54,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:56:54,109 INFO L87 Difference]: Start difference. First operand 3128 states and 7353 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:59,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:56:59,021 INFO L93 Difference]: Finished difference Result 4790 states and 10902 transitions. [2021-05-22 02:56:59,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-05-22 02:56:59,022 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:56:59,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:56:59,026 INFO L225 Difference]: With dead ends: 4790 [2021-05-22 02:56:59,026 INFO L226 Difference]: Without dead ends: 4748 [2021-05-22 02:56:59,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6035 ImplicationChecksByTransitivity, 4673.8ms TimeCoverageRelationStatistics Valid=2422, Invalid=14090, Unknown=0, NotChecked=0, Total=16512 [2021-05-22 02:56:59,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4748 states. [2021-05-22 02:56:59,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4748 to 3140. [2021-05-22 02:56:59,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3140 states, 3139 states have (on average 2.352341510035043) internal successors, (7384), 3139 states have internal predecessors, (7384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:59,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 7384 transitions. [2021-05-22 02:56:59,060 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 7384 transitions. Word has length 35 [2021-05-22 02:56:59,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:56:59,061 INFO L482 AbstractCegarLoop]: Abstraction has 3140 states and 7384 transitions. [2021-05-22 02:56:59,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:56:59,061 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 7384 transitions. [2021-05-22 02:56:59,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:56:59,064 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:56:59,064 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:56:59,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1217 [2021-05-22 02:56:59,265 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:56:59,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:56:59,265 INFO L82 PathProgramCache]: Analyzing trace with hash 2094563453, now seen corresponding path program 85 times [2021-05-22 02:56:59,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:56:59,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625087168] [2021-05-22 02:56:59,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:56:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:59,447 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:56:59,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:56:59,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625087168] [2021-05-22 02:56:59,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625087168] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:59,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627767229] [2021-05-22 02:56:59,447 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 [2021-05-22 02:56:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:56:59,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:56:59,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:56:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:56:59,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627767229] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:56:59,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:56:59,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-05-22 02:56:59,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076982072] [2021-05-22 02:56:59,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-22 02:56:59,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:56:59,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-22 02:56:59,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:56:59,862 INFO L87 Difference]: Start difference. First operand 3140 states and 7384 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:01,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:01,743 INFO L93 Difference]: Finished difference Result 3894 states and 8946 transitions. [2021-05-22 02:57:01,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-22 02:57:01,743 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:57:01,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:01,747 INFO L225 Difference]: With dead ends: 3894 [2021-05-22 02:57:01,747 INFO L226 Difference]: Without dead ends: 3894 [2021-05-22 02:57:01,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1440 ImplicationChecksByTransitivity, 1756.1ms TimeCoverageRelationStatistics Valid=1006, Invalid=4396, Unknown=0, NotChecked=0, Total=5402 [2021-05-22 02:57:01,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3894 states. [2021-05-22 02:57:01,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3894 to 3148. [2021-05-22 02:57:01,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3148 states, 3147 states have (on average 2.3511280584683827) internal successors, (7399), 3147 states have internal predecessors, (7399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:01,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3148 states to 3148 states and 7399 transitions. [2021-05-22 02:57:01,778 INFO L78 Accepts]: Start accepts. Automaton has 3148 states and 7399 transitions. Word has length 35 [2021-05-22 02:57:01,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:01,778 INFO L482 AbstractCegarLoop]: Abstraction has 3148 states and 7399 transitions. [2021-05-22 02:57:01,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:01,778 INFO L276 IsEmpty]: Start isEmpty. Operand 3148 states and 7399 transitions. [2021-05-22 02:57:01,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:57:01,780 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:01,781 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:01,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1235 [2021-05-22 02:57:01,981 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:01,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:01,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1577622011, now seen corresponding path program 86 times [2021-05-22 02:57:01,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:01,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267226420] [2021-05-22 02:57:01,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:01,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:02,135 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:02,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:02,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267226420] [2021-05-22 02:57:02,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267226420] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:02,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131423310] [2021-05-22 02:57:02,136 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 [2021-05-22 02:57:02,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:57:02,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:57:02,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:57:02,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:02,534 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:02,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131423310] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:02,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:02,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-05-22 02:57:02,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103315754] [2021-05-22 02:57:02,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-22 02:57:02,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:02,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-22 02:57:02,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:57:02,535 INFO L87 Difference]: Start difference. First operand 3148 states and 7399 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:04,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:04,334 INFO L93 Difference]: Finished difference Result 4657 states and 10723 transitions. [2021-05-22 02:57:04,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-22 02:57:04,335 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:57:04,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:04,339 INFO L225 Difference]: With dead ends: 4657 [2021-05-22 02:57:04,339 INFO L226 Difference]: Without dead ends: 4654 [2021-05-22 02:57:04,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 1653.0ms TimeCoverageRelationStatistics Valid=896, Invalid=4216, Unknown=0, NotChecked=0, Total=5112 [2021-05-22 02:57:04,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4654 states. [2021-05-22 02:57:04,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4654 to 3187. [2021-05-22 02:57:04,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3187 states, 3186 states have (on average 2.349968612680477) internal successors, (7487), 3186 states have internal predecessors, (7487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:04,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3187 states to 3187 states and 7487 transitions. [2021-05-22 02:57:04,371 INFO L78 Accepts]: Start accepts. Automaton has 3187 states and 7487 transitions. Word has length 35 [2021-05-22 02:57:04,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:04,371 INFO L482 AbstractCegarLoop]: Abstraction has 3187 states and 7487 transitions. [2021-05-22 02:57:04,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:04,371 INFO L276 IsEmpty]: Start isEmpty. Operand 3187 states and 7487 transitions. [2021-05-22 02:57:04,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:57:04,373 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:04,374 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:04,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1257 [2021-05-22 02:57:04,577 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:04,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:04,577 INFO L82 PathProgramCache]: Analyzing trace with hash -2070250695, now seen corresponding path program 87 times [2021-05-22 02:57:04,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:04,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988372561] [2021-05-22 02:57:04,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:04,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:04,707 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:04,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:04,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988372561] [2021-05-22 02:57:04,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988372561] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:04,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724857196] [2021-05-22 02:57:04,708 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 [2021-05-22 02:57:04,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-22 02:57:04,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:57:04,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:57:04,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:05,139 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:05,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724857196] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:05,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:05,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-05-22 02:57:05,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295365636] [2021-05-22 02:57:05,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-22 02:57:05,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:05,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-22 02:57:05,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:57:05,140 INFO L87 Difference]: Start difference. First operand 3187 states and 7487 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:06,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:06,665 INFO L93 Difference]: Finished difference Result 5710 states and 13179 transitions. [2021-05-22 02:57:06,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-22 02:57:06,665 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:57:06,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:06,671 INFO L225 Difference]: With dead ends: 5710 [2021-05-22 02:57:06,671 INFO L226 Difference]: Without dead ends: 5686 [2021-05-22 02:57:06,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 1367.5ms TimeCoverageRelationStatistics Valid=857, Invalid=3835, Unknown=0, NotChecked=0, Total=4692 [2021-05-22 02:57:06,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2021-05-22 02:57:06,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 4202. [2021-05-22 02:57:06,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4202 states, 4201 states have (on average 2.379909545346346) internal successors, (9998), 4201 states have internal predecessors, (9998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:06,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4202 states to 4202 states and 9998 transitions. [2021-05-22 02:57:06,719 INFO L78 Accepts]: Start accepts. Automaton has 4202 states and 9998 transitions. Word has length 35 [2021-05-22 02:57:06,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:06,719 INFO L482 AbstractCegarLoop]: Abstraction has 4202 states and 9998 transitions. [2021-05-22 02:57:06,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:06,719 INFO L276 IsEmpty]: Start isEmpty. Operand 4202 states and 9998 transitions. [2021-05-22 02:57:06,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:57:06,723 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:06,723 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:06,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1276 [2021-05-22 02:57:06,924 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:06,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:06,924 INFO L82 PathProgramCache]: Analyzing trace with hash 739863609, now seen corresponding path program 88 times [2021-05-22 02:57:06,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:06,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578069886] [2021-05-22 02:57:06,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:06,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:07,144 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:07,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:07,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578069886] [2021-05-22 02:57:07,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578069886] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:07,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017469788] [2021-05-22 02:57:07,145 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 [2021-05-22 02:57:07,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:57:07,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:57:07,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-22 02:57:07,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:07,706 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:07,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017469788] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:07,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:07,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-05-22 02:57:07,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105729519] [2021-05-22 02:57:07,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-22 02:57:07,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:07,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-22 02:57:07,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:57:07,707 INFO L87 Difference]: Start difference. First operand 4202 states and 9998 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:11,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:11,424 INFO L93 Difference]: Finished difference Result 7108 states and 16347 transitions. [2021-05-22 02:57:11,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-22 02:57:11,424 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:57:11,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:11,431 INFO L225 Difference]: With dead ends: 7108 [2021-05-22 02:57:11,431 INFO L226 Difference]: Without dead ends: 7017 [2021-05-22 02:57:11,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4316 ImplicationChecksByTransitivity, 3308.4ms TimeCoverageRelationStatistics Valid=1552, Invalid=10658, Unknown=0, NotChecked=0, Total=12210 [2021-05-22 02:57:11,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7017 states. [2021-05-22 02:57:11,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7017 to 4409. [2021-05-22 02:57:11,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 4408 states have (on average 2.3940562613430125) internal successors, (10553), 4408 states have internal predecessors, (10553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:11,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 10553 transitions. [2021-05-22 02:57:11,483 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 10553 transitions. Word has length 35 [2021-05-22 02:57:11,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:11,483 INFO L482 AbstractCegarLoop]: Abstraction has 4409 states and 10553 transitions. [2021-05-22 02:57:11,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:11,483 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 10553 transitions. [2021-05-22 02:57:11,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:57:11,486 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:11,487 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:11,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1293,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:57:11,687 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:11,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:11,687 INFO L82 PathProgramCache]: Analyzing trace with hash -179807687, now seen corresponding path program 89 times [2021-05-22 02:57:11,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:11,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100254725] [2021-05-22 02:57:11,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:11,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:11,951 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:11,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:11,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100254725] [2021-05-22 02:57:11,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100254725] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:11,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743211856] [2021-05-22 02:57:11,952 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 [2021-05-22 02:57:11,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-22 02:57:11,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:57:11,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-22 02:57:11,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:12,371 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:12,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743211856] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:12,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:12,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2021-05-22 02:57:12,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867860590] [2021-05-22 02:57:12,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-22 02:57:12,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:12,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-22 02:57:12,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:57:12,372 INFO L87 Difference]: Start difference. First operand 4409 states and 10553 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 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) [2021-05-22 02:57:16,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:16,371 INFO L93 Difference]: Finished difference Result 6487 states and 15070 transitions. [2021-05-22 02:57:16,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-22 02:57:16,371 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 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 35 [2021-05-22 02:57:16,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:16,377 INFO L225 Difference]: With dead ends: 6487 [2021-05-22 02:57:16,377 INFO L226 Difference]: Without dead ends: 6433 [2021-05-22 02:57:16,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3538 ImplicationChecksByTransitivity, 3543.4ms TimeCoverageRelationStatistics Valid=1209, Invalid=10347, Unknown=0, NotChecked=0, Total=11556 [2021-05-22 02:57:16,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6433 states. [2021-05-22 02:57:16,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6433 to 4475. [2021-05-22 02:57:16,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4475 states, 4474 states have (on average 2.388913723737148) internal successors, (10688), 4474 states have internal predecessors, (10688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:16,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4475 states to 4475 states and 10688 transitions. [2021-05-22 02:57:16,427 INFO L78 Accepts]: Start accepts. Automaton has 4475 states and 10688 transitions. Word has length 35 [2021-05-22 02:57:16,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:16,427 INFO L482 AbstractCegarLoop]: Abstraction has 4475 states and 10688 transitions. [2021-05-22 02:57:16,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 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) [2021-05-22 02:57:16,427 INFO L276 IsEmpty]: Start isEmpty. Operand 4475 states and 10688 transitions. [2021-05-22 02:57:16,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:57:16,431 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:16,431 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:16,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1316,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:57:16,631 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:16,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:16,632 INFO L82 PathProgramCache]: Analyzing trace with hash -724083655, now seen corresponding path program 90 times [2021-05-22 02:57:16,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:16,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818964140] [2021-05-22 02:57:16,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:16,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:16,757 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:57:16,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:16,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818964140] [2021-05-22 02:57:16,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818964140] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:16,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935454049] [2021-05-22 02:57:16,758 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 [2021-05-22 02:57:16,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-22 02:57:16,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:57:16,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-22 02:57:16,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:17,159 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:17,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935454049] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:17,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:17,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-05-22 02:57:17,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003984697] [2021-05-22 02:57:17,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-22 02:57:17,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:17,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-22 02:57:17,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:57:17,160 INFO L87 Difference]: Start difference. First operand 4475 states and 10688 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-05-22 02:57:18,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:18,425 INFO L93 Difference]: Finished difference Result 6393 states and 14863 transitions. [2021-05-22 02:57:18,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-22 02:57:18,425 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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 35 [2021-05-22 02:57:18,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:18,433 INFO L225 Difference]: With dead ends: 6393 [2021-05-22 02:57:18,433 INFO L226 Difference]: Without dead ends: 6357 [2021-05-22 02:57:18,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 1191.1ms TimeCoverageRelationStatistics Valid=825, Invalid=3465, Unknown=0, NotChecked=0, Total=4290 [2021-05-22 02:57:18,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6357 states. [2021-05-22 02:57:18,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6357 to 4465. [2021-05-22 02:57:18,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4465 states, 4464 states have (on average 2.3875448028673834) internal successors, (10658), 4464 states have internal predecessors, (10658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:18,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4465 states to 4465 states and 10658 transitions. [2021-05-22 02:57:18,507 INFO L78 Accepts]: Start accepts. Automaton has 4465 states and 10658 transitions. Word has length 35 [2021-05-22 02:57:18,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:18,507 INFO L482 AbstractCegarLoop]: Abstraction has 4465 states and 10658 transitions. [2021-05-22 02:57:18,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-05-22 02:57:18,507 INFO L276 IsEmpty]: Start isEmpty. Operand 4465 states and 10658 transitions. [2021-05-22 02:57:18,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:57:18,512 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:18,512 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:18,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1325 [2021-05-22 02:57:18,729 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:18,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:18,729 INFO L82 PathProgramCache]: Analyzing trace with hash 756997177, now seen corresponding path program 91 times [2021-05-22 02:57:18,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:18,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709100599] [2021-05-22 02:57:18,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:18,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:18,847 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:18,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:18,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709100599] [2021-05-22 02:57:18,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709100599] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:18,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998113616] [2021-05-22 02:57:18,848 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 [2021-05-22 02:57:18,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:18,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-22 02:57:18,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:19,290 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:19,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998113616] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:19,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:19,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-05-22 02:57:19,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797384536] [2021-05-22 02:57:19,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-22 02:57:19,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:19,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-22 02:57:19,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:57:19,291 INFO L87 Difference]: Start difference. First operand 4465 states and 10658 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:20,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:20,508 INFO L93 Difference]: Finished difference Result 5425 states and 12731 transitions. [2021-05-22 02:57:20,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-22 02:57:20,509 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:57:20,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:20,514 INFO L225 Difference]: With dead ends: 5425 [2021-05-22 02:57:20,514 INFO L226 Difference]: Without dead ends: 5407 [2021-05-22 02:57:20,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 1213.9ms TimeCoverageRelationStatistics Valid=797, Invalid=3363, Unknown=0, NotChecked=0, Total=4160 [2021-05-22 02:57:20,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5407 states. [2021-05-22 02:57:20,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5407 to 4211. [2021-05-22 02:57:20,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4211 states, 4210 states have (on average 2.3767220902612824) internal successors, (10006), 4210 states have internal predecessors, (10006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:20,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4211 states to 4211 states and 10006 transitions. [2021-05-22 02:57:20,557 INFO L78 Accepts]: Start accepts. Automaton has 4211 states and 10006 transitions. Word has length 35 [2021-05-22 02:57:20,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:20,557 INFO L482 AbstractCegarLoop]: Abstraction has 4211 states and 10006 transitions. [2021-05-22 02:57:20,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:20,557 INFO L276 IsEmpty]: Start isEmpty. Operand 4211 states and 10006 transitions. [2021-05-22 02:57:20,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:57:20,560 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:20,560 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:20,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1340,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:57:20,761 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:20,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:20,761 INFO L82 PathProgramCache]: Analyzing trace with hash 938061735, now seen corresponding path program 92 times [2021-05-22 02:57:20,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:20,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243310932] [2021-05-22 02:57:20,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:20,881 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:20,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:20,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243310932] [2021-05-22 02:57:20,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243310932] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:20,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996069135] [2021-05-22 02:57:20,882 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 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 [2021-05-22 02:57:20,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:57:20,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:57:20,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-22 02:57:20,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:21,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996069135] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:21,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:21,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-05-22 02:57:21,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095412140] [2021-05-22 02:57:21,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-22 02:57:21,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:21,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-22 02:57:21,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:57:21,268 INFO L87 Difference]: Start difference. First operand 4211 states and 10006 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:22,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:22,168 INFO L93 Difference]: Finished difference Result 4658 states and 10935 transitions. [2021-05-22 02:57:22,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-22 02:57:22,169 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:57:22,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:22,173 INFO L225 Difference]: With dead ends: 4658 [2021-05-22 02:57:22,173 INFO L226 Difference]: Without dead ends: 4654 [2021-05-22 02:57:22,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 917.5ms TimeCoverageRelationStatistics Valid=548, Invalid=2644, Unknown=0, NotChecked=0, Total=3192 [2021-05-22 02:57:22,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4654 states. [2021-05-22 02:57:22,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4654 to 4228. [2021-05-22 02:57:22,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.3763898746155667) internal successors, (10045), 4227 states have internal predecessors, (10045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:22,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 10045 transitions. [2021-05-22 02:57:22,224 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 10045 transitions. Word has length 35 [2021-05-22 02:57:22,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:22,224 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 10045 transitions. [2021-05-22 02:57:22,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:22,224 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 10045 transitions. [2021-05-22 02:57:22,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:57:22,227 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:22,227 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:22,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1363 [2021-05-22 02:57:22,428 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:22,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:22,428 INFO L82 PathProgramCache]: Analyzing trace with hash -817736003, now seen corresponding path program 93 times [2021-05-22 02:57:22,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:22,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461516790] [2021-05-22 02:57:22,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:22,699 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:22,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:22,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461516790] [2021-05-22 02:57:22,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461516790] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:22,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164667639] [2021-05-22 02:57:22,699 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 [2021-05-22 02:57:22,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-22 02:57:22,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:57:22,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-22 02:57:22,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:23,336 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:23,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164667639] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:23,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:23,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-05-22 02:57:23,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101087775] [2021-05-22 02:57:23,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:57:23,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:23,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:57:23,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:57:23,338 INFO L87 Difference]: Start difference. First operand 4228 states and 10045 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:28,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:28,814 INFO L93 Difference]: Finished difference Result 7630 states and 17556 transitions. [2021-05-22 02:57:28,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-05-22 02:57:28,814 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:57:28,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:28,821 INFO L225 Difference]: With dead ends: 7630 [2021-05-22 02:57:28,821 INFO L226 Difference]: Without dead ends: 7551 [2021-05-22 02:57:28,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7268 ImplicationChecksByTransitivity, 4923.7ms TimeCoverageRelationStatistics Valid=2403, Invalid=16779, Unknown=0, NotChecked=0, Total=19182 [2021-05-22 02:57:28,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7551 states. [2021-05-22 02:57:28,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7551 to 4786. [2021-05-22 02:57:28,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4786 states, 4785 states have (on average 2.400208986415883) internal successors, (11485), 4785 states have internal predecessors, (11485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:28,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4786 states to 4786 states and 11485 transitions. [2021-05-22 02:57:28,878 INFO L78 Accepts]: Start accepts. Automaton has 4786 states and 11485 transitions. Word has length 35 [2021-05-22 02:57:28,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:28,878 INFO L482 AbstractCegarLoop]: Abstraction has 4786 states and 11485 transitions. [2021-05-22 02:57:28,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:28,878 INFO L276 IsEmpty]: Start isEmpty. Operand 4786 states and 11485 transitions. [2021-05-22 02:57:28,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:57:28,882 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:28,882 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:29,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1383,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:57:29,082 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:29,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:29,082 INFO L82 PathProgramCache]: Analyzing trace with hash -756933699, now seen corresponding path program 94 times [2021-05-22 02:57:29,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:29,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740656976] [2021-05-22 02:57:29,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:29,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:29,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:29,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740656976] [2021-05-22 02:57:29,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740656976] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:29,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18967957] [2021-05-22 02:57:29,330 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 [2021-05-22 02:57:29,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:57:29,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:57:29,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-22 02:57:29,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:29,970 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:29,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18967957] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:29,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:29,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-05-22 02:57:29,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579288835] [2021-05-22 02:57:29,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:57:29,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:29,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:57:29,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:57:29,971 INFO L87 Difference]: Start difference. First operand 4786 states and 11485 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:34,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:34,578 INFO L93 Difference]: Finished difference Result 7197 states and 16708 transitions. [2021-05-22 02:57:34,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-22 02:57:34,578 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:57:34,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:34,586 INFO L225 Difference]: With dead ends: 7197 [2021-05-22 02:57:34,586 INFO L226 Difference]: Without dead ends: 7141 [2021-05-22 02:57:34,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4854 ImplicationChecksByTransitivity, 4256.9ms TimeCoverageRelationStatistics Valid=1899, Invalid=12143, Unknown=0, NotChecked=0, Total=14042 [2021-05-22 02:57:34,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7141 states. [2021-05-22 02:57:34,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7141 to 4905. [2021-05-22 02:57:34,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4905 states, 4904 states have (on average 2.4074225122349104) internal successors, (11806), 4904 states have internal predecessors, (11806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:34,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4905 states to 4905 states and 11806 transitions. [2021-05-22 02:57:34,665 INFO L78 Accepts]: Start accepts. Automaton has 4905 states and 11806 transitions. Word has length 35 [2021-05-22 02:57:34,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:34,665 INFO L482 AbstractCegarLoop]: Abstraction has 4905 states and 11806 transitions. [2021-05-22 02:57:34,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:34,665 INFO L276 IsEmpty]: Start isEmpty. Operand 4905 states and 11806 transitions. [2021-05-22 02:57:34,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:57:34,668 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:34,669 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:34,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1405,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:57:34,869 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:34,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:34,870 INFO L82 PathProgramCache]: Analyzing trace with hash -156220415, now seen corresponding path program 95 times [2021-05-22 02:57:34,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:34,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665745424] [2021-05-22 02:57:34,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:34,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:57:35,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:35,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665745424] [2021-05-22 02:57:35,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665745424] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:35,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750009507] [2021-05-22 02:57:35,084 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 [2021-05-22 02:57:35,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-22 02:57:35,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:57:35,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:57:35,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:35,543 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:35,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750009507] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:35,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:35,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-05-22 02:57:35,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444923220] [2021-05-22 02:57:35,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-22 02:57:35,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:35,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-22 02:57:35,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:57:35,544 INFO L87 Difference]: Start difference. First operand 4905 states and 11806 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:37,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:37,595 INFO L93 Difference]: Finished difference Result 6702 states and 15725 transitions. [2021-05-22 02:57:37,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-22 02:57:37,595 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:57:37,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:37,602 INFO L225 Difference]: With dead ends: 6702 [2021-05-22 02:57:37,602 INFO L226 Difference]: Without dead ends: 6678 [2021-05-22 02:57:37,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 2032.2ms TimeCoverageRelationStatistics Valid=1165, Invalid=4997, Unknown=0, NotChecked=0, Total=6162 [2021-05-22 02:57:37,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6678 states. [2021-05-22 02:57:37,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6678 to 3663. [2021-05-22 02:57:37,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3663 states, 3662 states have (on average 2.367012561441835) internal successors, (8668), 3662 states have internal predecessors, (8668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:37,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3663 states to 3663 states and 8668 transitions. [2021-05-22 02:57:37,650 INFO L78 Accepts]: Start accepts. Automaton has 3663 states and 8668 transitions. Word has length 35 [2021-05-22 02:57:37,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:37,650 INFO L482 AbstractCegarLoop]: Abstraction has 3663 states and 8668 transitions. [2021-05-22 02:57:37,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:37,650 INFO L276 IsEmpty]: Start isEmpty. Operand 3663 states and 8668 transitions. [2021-05-22 02:57:37,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:57:37,653 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:37,653 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:37,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1425,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:57:37,853 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:37,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:37,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1416553917, now seen corresponding path program 96 times [2021-05-22 02:57:37,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:37,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069380104] [2021-05-22 02:57:37,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:37,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:38,055 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:57:38,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:38,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069380104] [2021-05-22 02:57:38,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069380104] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:38,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286129724] [2021-05-22 02:57:38,056 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 [2021-05-22 02:57:38,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 02:57:38,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:57:38,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-22 02:57:38,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:38,628 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:38,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286129724] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:38,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:38,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-05-22 02:57:38,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354690938] [2021-05-22 02:57:38,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-22 02:57:38,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:38,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-22 02:57:38,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:57:38,629 INFO L87 Difference]: Start difference. First operand 3663 states and 8668 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 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) [2021-05-22 02:57:41,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:41,523 INFO L93 Difference]: Finished difference Result 5512 states and 12685 transitions. [2021-05-22 02:57:41,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-22 02:57:41,524 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 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 35 [2021-05-22 02:57:41,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:41,529 INFO L225 Difference]: With dead ends: 5512 [2021-05-22 02:57:41,529 INFO L226 Difference]: Without dead ends: 5461 [2021-05-22 02:57:41,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2673 ImplicationChecksByTransitivity, 2888.2ms TimeCoverageRelationStatistics Valid=1101, Invalid=7089, Unknown=0, NotChecked=0, Total=8190 [2021-05-22 02:57:41,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5461 states. [2021-05-22 02:57:41,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5461 to 3678. [2021-05-22 02:57:41,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3678 states, 3677 states have (on average 2.361435953222736) internal successors, (8683), 3677 states have internal predecessors, (8683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:41,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3678 states to 3678 states and 8683 transitions. [2021-05-22 02:57:41,567 INFO L78 Accepts]: Start accepts. Automaton has 3678 states and 8683 transitions. Word has length 35 [2021-05-22 02:57:41,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:41,567 INFO L482 AbstractCegarLoop]: Abstraction has 3678 states and 8683 transitions. [2021-05-22 02:57:41,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 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) [2021-05-22 02:57:41,567 INFO L276 IsEmpty]: Start isEmpty. Operand 3678 states and 8683 transitions. [2021-05-22 02:57:41,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-22 02:57:41,570 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:41,570 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:41,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1439 [2021-05-22 02:57:41,770 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:41,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:41,770 INFO L82 PathProgramCache]: Analyzing trace with hash -756433177, now seen corresponding path program 97 times [2021-05-22 02:57:41,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:41,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118142592] [2021-05-22 02:57:41,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:41,889 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:41,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:41,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118142592] [2021-05-22 02:57:41,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118142592] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:41,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927790498] [2021-05-22 02:57:41,890 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 [2021-05-22 02:57:41,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:41,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-22 02:57:41,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:42,314 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:42,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927790498] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:42,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:42,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-05-22 02:57:42,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942602591] [2021-05-22 02:57:42,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-22 02:57:42,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:42,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-22 02:57:42,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:57:42,315 INFO L87 Difference]: Start difference. First operand 3678 states and 8683 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:43,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:43,670 INFO L93 Difference]: Finished difference Result 4687 states and 10833 transitions. [2021-05-22 02:57:43,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-22 02:57:43,671 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:57:43,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:43,674 INFO L225 Difference]: With dead ends: 4687 [2021-05-22 02:57:43,674 INFO L226 Difference]: Without dead ends: 4675 [2021-05-22 02:57:43,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 1230.6ms TimeCoverageRelationStatistics Valid=697, Invalid=3335, Unknown=0, NotChecked=0, Total=4032 [2021-05-22 02:57:43,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4675 states. [2021-05-22 02:57:43,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4675 to 3716. [2021-05-22 02:57:43,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 3715 states have (on average 2.364199192462988) internal successors, (8783), 3715 states have internal predecessors, (8783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:43,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 8783 transitions. [2021-05-22 02:57:43,708 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 8783 transitions. Word has length 35 [2021-05-22 02:57:43,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:43,708 INFO L482 AbstractCegarLoop]: Abstraction has 3716 states and 8783 transitions. [2021-05-22 02:57:43,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:43,708 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 8783 transitions. [2021-05-22 02:57:43,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:57:43,711 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:43,711 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:43,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1458 [2021-05-22 02:57:43,911 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:43,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:43,912 INFO L82 PathProgramCache]: Analyzing trace with hash -869656803, now seen corresponding path program 98 times [2021-05-22 02:57:43,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:43,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855570145] [2021-05-22 02:57:43,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:43,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:44,013 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:44,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:44,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855570145] [2021-05-22 02:57:44,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855570145] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:44,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371447783] [2021-05-22 02:57:44,013 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 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 [2021-05-22 02:57:44,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:57:44,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:57:44,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-22 02:57:44,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:44,267 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:44,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371447783] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:44,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:44,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-05-22 02:57:44,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707856501] [2021-05-22 02:57:44,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-22 02:57:44,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:44,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-22 02:57:44,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:57:44,268 INFO L87 Difference]: Start difference. First operand 3716 states and 8783 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:45,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:45,571 INFO L93 Difference]: Finished difference Result 5434 states and 12387 transitions. [2021-05-22 02:57:45,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-22 02:57:45,572 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:57:45,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:45,576 INFO L225 Difference]: With dead ends: 5434 [2021-05-22 02:57:45,576 INFO L226 Difference]: Without dead ends: 5434 [2021-05-22 02:57:45,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2268 ImplicationChecksByTransitivity, 1161.9ms TimeCoverageRelationStatistics Valid=2085, Invalid=5925, Unknown=0, NotChecked=0, Total=8010 [2021-05-22 02:57:45,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5434 states. [2021-05-22 02:57:45,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5434 to 4658. [2021-05-22 02:57:45,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4658 states, 4657 states have (on average 2.3474339703671894) internal successors, (10932), 4657 states have internal predecessors, (10932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:45,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4658 states to 4658 states and 10932 transitions. [2021-05-22 02:57:45,621 INFO L78 Accepts]: Start accepts. Automaton has 4658 states and 10932 transitions. Word has length 37 [2021-05-22 02:57:45,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:45,621 INFO L482 AbstractCegarLoop]: Abstraction has 4658 states and 10932 transitions. [2021-05-22 02:57:45,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:45,621 INFO L276 IsEmpty]: Start isEmpty. Operand 4658 states and 10932 transitions. [2021-05-22 02:57:45,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:57:45,625 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:45,625 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:45,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1473,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:57:45,825 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:45,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:45,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1373714529, now seen corresponding path program 99 times [2021-05-22 02:57:45,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:45,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844480698] [2021-05-22 02:57:45,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:45,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:45,881 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:45,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:45,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844480698] [2021-05-22 02:57:45,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844480698] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:45,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072632775] [2021-05-22 02:57:45,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:57:45,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-22 02:57:45,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:57:45,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-22 02:57:45,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:46,158 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:46,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072632775] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:46,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:46,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 24 [2021-05-22 02:57:46,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646810903] [2021-05-22 02:57:46,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:57:46,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:46,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:57:46,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:57:46,159 INFO L87 Difference]: Start difference. First operand 4658 states and 10932 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:48,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:48,188 INFO L93 Difference]: Finished difference Result 5175 states and 11919 transitions. [2021-05-22 02:57:48,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-05-22 02:57:48,188 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:57:48,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:48,193 INFO L225 Difference]: With dead ends: 5175 [2021-05-22 02:57:48,193 INFO L226 Difference]: Without dead ends: 5171 [2021-05-22 02:57:48,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4929 ImplicationChecksByTransitivity, 1877.9ms TimeCoverageRelationStatistics Valid=3112, Invalid=10228, Unknown=0, NotChecked=0, Total=13340 [2021-05-22 02:57:48,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5171 states. [2021-05-22 02:57:48,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5171 to 4602. [2021-05-22 02:57:48,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4602 states, 4601 states have (on average 2.344925016300804) internal successors, (10789), 4601 states have internal predecessors, (10789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:48,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4602 states to 4602 states and 10789 transitions. [2021-05-22 02:57:48,237 INFO L78 Accepts]: Start accepts. Automaton has 4602 states and 10789 transitions. Word has length 37 [2021-05-22 02:57:48,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:48,237 INFO L482 AbstractCegarLoop]: Abstraction has 4602 states and 10789 transitions. [2021-05-22 02:57:48,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:48,237 INFO L276 IsEmpty]: Start isEmpty. Operand 4602 states and 10789 transitions. [2021-05-22 02:57:48,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:57:48,240 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:48,240 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:48,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1482,100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:57:48,441 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:48,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:48,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1156107053, now seen corresponding path program 100 times [2021-05-22 02:57:48,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:48,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133035659] [2021-05-22 02:57:48,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:48,847 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:48,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:48,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133035659] [2021-05-22 02:57:48,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133035659] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:48,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573387487] [2021-05-22 02:57:48,848 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 [2021-05-22 02:57:48,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:57:48,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:57:48,873 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-22 02:57:48,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:49,621 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:49,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573387487] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:49,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:49,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2021-05-22 02:57:49,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98861013] [2021-05-22 02:57:49,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:57:49,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:49,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:57:49,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1131, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:57:49,622 INFO L87 Difference]: Start difference. First operand 4602 states and 10789 transitions. Second operand has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 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) [2021-05-22 02:57:51,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:51,053 INFO L93 Difference]: Finished difference Result 5204 states and 12036 transitions. [2021-05-22 02:57:51,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-22 02:57:51,053 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 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 37 [2021-05-22 02:57:51,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:51,058 INFO L225 Difference]: With dead ends: 5204 [2021-05-22 02:57:51,058 INFO L226 Difference]: Without dead ends: 5150 [2021-05-22 02:57:51,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1796.3ms TimeCoverageRelationStatistics Valid=371, Invalid=3051, Unknown=0, NotChecked=0, Total=3422 [2021-05-22 02:57:51,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5150 states. [2021-05-22 02:57:51,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5150 to 4618. [2021-05-22 02:57:51,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4618 states, 4617 states have (on average 2.342863331167425) internal successors, (10817), 4617 states have internal predecessors, (10817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:51,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4618 states to 4618 states and 10817 transitions. [2021-05-22 02:57:51,105 INFO L78 Accepts]: Start accepts. Automaton has 4618 states and 10817 transitions. Word has length 37 [2021-05-22 02:57:51,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:51,105 INFO L482 AbstractCegarLoop]: Abstraction has 4618 states and 10817 transitions. [2021-05-22 02:57:51,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 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) [2021-05-22 02:57:51,105 INFO L276 IsEmpty]: Start isEmpty. Operand 4618 states and 10817 transitions. [2021-05-22 02:57:51,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:57:51,109 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:51,109 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:51,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1490,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:57:51,310 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:51,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:51,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1012654923, now seen corresponding path program 101 times [2021-05-22 02:57:51,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:51,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664101209] [2021-05-22 02:57:51,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:51,567 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:51,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:51,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664101209] [2021-05-22 02:57:51,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664101209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:51,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073709832] [2021-05-22 02:57:51,568 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 [2021-05-22 02:57:51,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-22 02:57:51,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:57:51,592 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-22 02:57:51,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:52,184 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:52,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073709832] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:52,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:52,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2021-05-22 02:57:52,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317993353] [2021-05-22 02:57:52,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-22 02:57:52,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:52,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-22 02:57:52,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1268, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:57:52,186 INFO L87 Difference]: Start difference. First operand 4618 states and 10817 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:54,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:54,920 INFO L93 Difference]: Finished difference Result 5242 states and 12110 transitions. [2021-05-22 02:57:54,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-22 02:57:54,920 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 02:57:54,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:54,924 INFO L225 Difference]: With dead ends: 5242 [2021-05-22 02:57:54,925 INFO L226 Difference]: Without dead ends: 5242 [2021-05-22 02:57:54,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2412 ImplicationChecksByTransitivity, 2570.4ms TimeCoverageRelationStatistics Valid=966, Invalid=7406, Unknown=0, NotChecked=0, Total=8372 [2021-05-22 02:57:54,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5242 states. [2021-05-22 02:57:54,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5242 to 4659. [2021-05-22 02:57:54,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 4658 states have (on average 2.343924431086303) internal successors, (10918), 4658 states have internal predecessors, (10918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:54,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 10918 transitions. [2021-05-22 02:57:54,969 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 10918 transitions. Word has length 37 [2021-05-22 02:57:54,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:54,969 INFO L482 AbstractCegarLoop]: Abstraction has 4659 states and 10918 transitions. [2021-05-22 02:57:54,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:54,970 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 10918 transitions. [2021-05-22 02:57:54,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:57:54,973 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:54,973 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:55,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1513 [2021-05-22 02:57:55,174 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:55,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:55,174 INFO L82 PathProgramCache]: Analyzing trace with hash -376851599, now seen corresponding path program 102 times [2021-05-22 02:57:55,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:55,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022019328] [2021-05-22 02:57:55,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:55,419 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:55,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:55,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022019328] [2021-05-22 02:57:55,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022019328] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:55,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959587844] [2021-05-22 02:57:55,420 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 [2021-05-22 02:57:55,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 02:57:55,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:57:55,452 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-22 02:57:55,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:56,157 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:56,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959587844] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:56,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:56,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-22 02:57:56,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232461999] [2021-05-22 02:57:56,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:57:56,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:56,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:57:56,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1214, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:57:56,158 INFO L87 Difference]: Start difference. First operand 4659 states and 10918 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:58,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:57:58,648 INFO L93 Difference]: Finished difference Result 5461 states and 12630 transitions. [2021-05-22 02:57:58,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-22 02:57:58,649 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:57:58,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:57:58,654 INFO L225 Difference]: With dead ends: 5461 [2021-05-22 02:57:58,654 INFO L226 Difference]: Without dead ends: 5461 [2021-05-22 02:57:58,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1750 ImplicationChecksByTransitivity, 2475.3ms TimeCoverageRelationStatistics Valid=635, Invalid=5845, Unknown=0, NotChecked=0, Total=6480 [2021-05-22 02:57:58,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5461 states. [2021-05-22 02:57:58,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5461 to 4679. [2021-05-22 02:57:58,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4679 states, 4678 states have (on average 2.344164172723386) internal successors, (10966), 4678 states have internal predecessors, (10966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:58,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4679 states to 4679 states and 10966 transitions. [2021-05-22 02:57:58,702 INFO L78 Accepts]: Start accepts. Automaton has 4679 states and 10966 transitions. Word has length 37 [2021-05-22 02:57:58,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:57:58,703 INFO L482 AbstractCegarLoop]: Abstraction has 4679 states and 10966 transitions. [2021-05-22 02:57:58,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:57:58,703 INFO L276 IsEmpty]: Start isEmpty. Operand 4679 states and 10966 transitions. [2021-05-22 02:57:58,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:57:58,706 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:57:58,706 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:57:58,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1532,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:57:58,907 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:57:58,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:57:58,907 INFO L82 PathProgramCache]: Analyzing trace with hash 719191221, now seen corresponding path program 103 times [2021-05-22 02:57:58,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:57:58,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715389988] [2021-05-22 02:57:58,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:57:58,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:59,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:57:59,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715389988] [2021-05-22 02:57:59,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715389988] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:59,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729432673] [2021-05-22 02:57:59,144 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 [2021-05-22 02:57:59,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:57:59,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-22 02:57:59,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:57:59,794 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:57:59,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729432673] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:57:59,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:57:59,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-22 02:57:59,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978991190] [2021-05-22 02:57:59,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:57:59,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:57:59,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:57:59,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1207, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:57:59,795 INFO L87 Difference]: Start difference. First operand 4679 states and 10966 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:02,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:58:02,485 INFO L93 Difference]: Finished difference Result 5286 states and 12264 transitions. [2021-05-22 02:58:02,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-22 02:58:02,486 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:58:02,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:58:02,491 INFO L225 Difference]: With dead ends: 5286 [2021-05-22 02:58:02,491 INFO L226 Difference]: Without dead ends: 5286 [2021-05-22 02:58:02,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 2467.8ms TimeCoverageRelationStatistics Valid=699, Invalid=6273, Unknown=0, NotChecked=0, Total=6972 [2021-05-22 02:58:02,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5286 states. [2021-05-22 02:58:02,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5286 to 4683. [2021-05-22 02:58:02,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4683 states, 4682 states have (on average 2.344724476719351) internal successors, (10978), 4682 states have internal predecessors, (10978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:02,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4683 states to 4683 states and 10978 transitions. [2021-05-22 02:58:02,536 INFO L78 Accepts]: Start accepts. Automaton has 4683 states and 10978 transitions. Word has length 37 [2021-05-22 02:58:02,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:58:02,536 INFO L482 AbstractCegarLoop]: Abstraction has 4683 states and 10978 transitions. [2021-05-22 02:58:02,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:02,537 INFO L276 IsEmpty]: Start isEmpty. Operand 4683 states and 10978 transitions. [2021-05-22 02:58:02,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:58:02,540 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:58:02,540 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:58:02,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1551 [2021-05-22 02:58:02,741 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:58:02,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:58:02,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1551615737, now seen corresponding path program 104 times [2021-05-22 02:58:02,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:58:02,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850576569] [2021-05-22 02:58:02,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:58:02,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:58:03,048 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:03,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:58:03,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850576569] [2021-05-22 02:58:03,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850576569] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:03,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137507139] [2021-05-22 02:58:03,049 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 [2021-05-22 02:58:03,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:58:03,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:58:03,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:58:03,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:58:03,529 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:03,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137507139] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:03,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:58:03,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 35 [2021-05-22 02:58:03,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332079557] [2021-05-22 02:58:03,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:58:03,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:58:03,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:58:03,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:58:03,530 INFO L87 Difference]: Start difference. First operand 4683 states and 10978 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:09,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:58:09,271 INFO L93 Difference]: Finished difference Result 6084 states and 13860 transitions. [2021-05-22 02:58:09,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-05-22 02:58:09,272 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 02:58:09,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:58:09,277 INFO L225 Difference]: With dead ends: 6084 [2021-05-22 02:58:09,278 INFO L226 Difference]: Without dead ends: 6042 [2021-05-22 02:58:09,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7850 ImplicationChecksByTransitivity, 5055.9ms TimeCoverageRelationStatistics Valid=1871, Invalid=21081, Unknown=0, NotChecked=0, Total=22952 [2021-05-22 02:58:09,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6042 states. [2021-05-22 02:58:09,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6042 to 4770. [2021-05-22 02:58:09,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4770 states, 4769 states have (on average 2.3514363598238623) internal successors, (11214), 4769 states have internal predecessors, (11214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:09,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4770 states to 4770 states and 11214 transitions. [2021-05-22 02:58:09,333 INFO L78 Accepts]: Start accepts. Automaton has 4770 states and 11214 transitions. Word has length 37 [2021-05-22 02:58:09,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:58:09,333 INFO L482 AbstractCegarLoop]: Abstraction has 4770 states and 11214 transitions. [2021-05-22 02:58:09,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:09,334 INFO L276 IsEmpty]: Start isEmpty. Operand 4770 states and 11214 transitions. [2021-05-22 02:58:09,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:58:09,337 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:58:09,337 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:58:09,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1568 [2021-05-22 02:58:09,538 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:58:09,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:58:09,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1422873149, now seen corresponding path program 105 times [2021-05-22 02:58:09,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:58:09,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986090075] [2021-05-22 02:58:09,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:58:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:58:09,845 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:09,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:58:09,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986090075] [2021-05-22 02:58:09,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986090075] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:09,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964275685] [2021-05-22 02:58:09,845 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 [2021-05-22 02:58:09,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-22 02:58:09,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:58:09,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-22 02:58:09,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:58:10,350 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:10,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964275685] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:10,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:58:10,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-05-22 02:58:10,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852259191] [2021-05-22 02:58:10,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:58:10,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:58:10,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:58:10,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1143, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:58:10,351 INFO L87 Difference]: Start difference. First operand 4770 states and 11214 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:14,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:58:14,504 INFO L93 Difference]: Finished difference Result 6513 states and 14860 transitions. [2021-05-22 02:58:14,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-22 02:58:14,504 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 02:58:14,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:58:14,511 INFO L225 Difference]: With dead ends: 6513 [2021-05-22 02:58:14,511 INFO L226 Difference]: Without dead ends: 6447 [2021-05-22 02:58:14,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4973 ImplicationChecksByTransitivity, 3754.4ms TimeCoverageRelationStatistics Valid=1486, Invalid=12794, Unknown=0, NotChecked=0, Total=14280 [2021-05-22 02:58:14,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6447 states. [2021-05-22 02:58:14,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6447 to 4842. [2021-05-22 02:58:14,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4842 states, 4841 states have (on average 2.3462094608551953) internal successors, (11358), 4841 states have internal predecessors, (11358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:14,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4842 states to 4842 states and 11358 transitions. [2021-05-22 02:58:14,575 INFO L78 Accepts]: Start accepts. Automaton has 4842 states and 11358 transitions. Word has length 37 [2021-05-22 02:58:14,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:58:14,575 INFO L482 AbstractCegarLoop]: Abstraction has 4842 states and 11358 transitions. [2021-05-22 02:58:14,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:14,575 INFO L276 IsEmpty]: Start isEmpty. Operand 4842 states and 11358 transitions. [2021-05-22 02:58:14,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:58:14,580 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:58:14,580 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:58:14,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1588 [2021-05-22 02:58:14,781 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:58:14,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:58:14,781 INFO L82 PathProgramCache]: Analyzing trace with hash -196919433, now seen corresponding path program 106 times [2021-05-22 02:58:14,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:58:14,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234521885] [2021-05-22 02:58:14,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:58:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:58:15,091 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:15,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:58:15,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234521885] [2021-05-22 02:58:15,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234521885] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:15,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824661752] [2021-05-22 02:58:15,092 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 [2021-05-22 02:58:15,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:58:15,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:58:15,115 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-22 02:58:15,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:58:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:15,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824661752] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:15,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:58:15,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-05-22 02:58:15,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429374209] [2021-05-22 02:58:15,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-22 02:58:15,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:58:15,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-22 02:58:15,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:58:15,723 INFO L87 Difference]: Start difference. First operand 4842 states and 11358 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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) [2021-05-22 02:58:17,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:58:17,551 INFO L93 Difference]: Finished difference Result 5247 states and 12151 transitions. [2021-05-22 02:58:17,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-22 02:58:17,551 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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 37 [2021-05-22 02:58:17,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:58:17,556 INFO L225 Difference]: With dead ends: 5247 [2021-05-22 02:58:17,556 INFO L226 Difference]: Without dead ends: 5247 [2021-05-22 02:58:17,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 1898.6ms TimeCoverageRelationStatistics Valid=444, Invalid=3588, Unknown=0, NotChecked=0, Total=4032 [2021-05-22 02:58:17,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5247 states. [2021-05-22 02:58:17,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5247 to 4860. [2021-05-22 02:58:17,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4860 states, 4859 states have (on average 2.3461617616793577) internal successors, (11400), 4859 states have internal predecessors, (11400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:17,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4860 states to 4860 states and 11400 transitions. [2021-05-22 02:58:17,602 INFO L78 Accepts]: Start accepts. Automaton has 4860 states and 11400 transitions. Word has length 37 [2021-05-22 02:58:17,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:58:17,602 INFO L482 AbstractCegarLoop]: Abstraction has 4860 states and 11400 transitions. [2021-05-22 02:58:17,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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) [2021-05-22 02:58:17,603 INFO L276 IsEmpty]: Start isEmpty. Operand 4860 states and 11400 transitions. [2021-05-22 02:58:17,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:58:17,606 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:58:17,606 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:58:17,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1608,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:58:17,807 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:58:17,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:58:17,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1929285887, now seen corresponding path program 107 times [2021-05-22 02:58:17,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:58:17,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186005513] [2021-05-22 02:58:17,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:58:17,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:58:18,080 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:18,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:58:18,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186005513] [2021-05-22 02:58:18,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186005513] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:18,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780564704] [2021-05-22 02:58:18,080 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 [2021-05-22 02:58:18,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-22 02:58:18,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:58:18,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:58:18,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:58:18,789 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:18,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780564704] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:18,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:58:18,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-05-22 02:58:18,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974198694] [2021-05-22 02:58:18,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-22 02:58:18,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:58:18,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-22 02:58:18,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:58:18,790 INFO L87 Difference]: Start difference. First operand 4860 states and 11400 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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) [2021-05-22 02:58:21,214 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-05-22 02:58:21,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:58:21,729 INFO L93 Difference]: Finished difference Result 5227 states and 12121 transitions. [2021-05-22 02:58:21,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-22 02:58:21,729 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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 37 [2021-05-22 02:58:21,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:58:21,734 INFO L225 Difference]: With dead ends: 5227 [2021-05-22 02:58:21,734 INFO L226 Difference]: Without dead ends: 5227 [2021-05-22 02:58:21,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 2854.6ms TimeCoverageRelationStatistics Valid=669, Invalid=5183, Unknown=0, NotChecked=0, Total=5852 [2021-05-22 02:58:21,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5227 states. [2021-05-22 02:58:21,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5227 to 4864. [2021-05-22 02:58:21,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4864 states, 4863 states have (on average 2.346699568167798) internal successors, (11412), 4863 states have internal predecessors, (11412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:21,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4864 states to 4864 states and 11412 transitions. [2021-05-22 02:58:21,783 INFO L78 Accepts]: Start accepts. Automaton has 4864 states and 11412 transitions. Word has length 37 [2021-05-22 02:58:21,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:58:21,783 INFO L482 AbstractCegarLoop]: Abstraction has 4864 states and 11412 transitions. [2021-05-22 02:58:21,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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) [2021-05-22 02:58:21,783 INFO L276 IsEmpty]: Start isEmpty. Operand 4864 states and 11412 transitions. [2021-05-22 02:58:21,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:58:21,786 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:58:21,786 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:58:21,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1629,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:58:21,987 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:58:21,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:58:21,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1533256893, now seen corresponding path program 108 times [2021-05-22 02:58:21,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:58:21,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885571506] [2021-05-22 02:58:21,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:58:21,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:58:22,262 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:22,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:58:22,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885571506] [2021-05-22 02:58:22,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885571506] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:22,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726637618] [2021-05-22 02:58:22,262 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 [2021-05-22 02:58:22,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 02:58:22,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:58:22,286 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-22 02:58:22,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:58:22,993 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:22,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726637618] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:22,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:58:22,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-05-22 02:58:22,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888261899] [2021-05-22 02:58:22,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-22 02:58:22,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:58:22,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-22 02:58:22,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:58:22,994 INFO L87 Difference]: Start difference. First operand 4864 states and 11412 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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) [2021-05-22 02:58:25,680 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2021-05-22 02:58:25,851 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2021-05-22 02:58:26,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:58:26,012 INFO L93 Difference]: Finished difference Result 5273 states and 12215 transitions. [2021-05-22 02:58:26,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-22 02:58:26,023 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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 37 [2021-05-22 02:58:26,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:58:26,029 INFO L225 Difference]: With dead ends: 5273 [2021-05-22 02:58:26,029 INFO L226 Difference]: Without dead ends: 5273 [2021-05-22 02:58:26,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1911 ImplicationChecksByTransitivity, 2928.7ms TimeCoverageRelationStatistics Valid=786, Invalid=5856, Unknown=0, NotChecked=0, Total=6642 [2021-05-22 02:58:26,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5273 states. [2021-05-22 02:58:26,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5273 to 4870. [2021-05-22 02:58:26,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4870 states, 4869 states have (on average 2.347915383035531) internal successors, (11432), 4869 states have internal predecessors, (11432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:26,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4870 states to 4870 states and 11432 transitions. [2021-05-22 02:58:26,092 INFO L78 Accepts]: Start accepts. Automaton has 4870 states and 11432 transitions. Word has length 37 [2021-05-22 02:58:26,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:58:26,092 INFO L482 AbstractCegarLoop]: Abstraction has 4870 states and 11432 transitions. [2021-05-22 02:58:26,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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) [2021-05-22 02:58:26,092 INFO L276 IsEmpty]: Start isEmpty. Operand 4870 states and 11432 transitions. [2021-05-22 02:58:26,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:58:26,096 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:58:26,096 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:58:26,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1650 [2021-05-22 02:58:26,297 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:58:26,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:58:26,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1661999481, now seen corresponding path program 109 times [2021-05-22 02:58:26,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:58:26,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967788752] [2021-05-22 02:58:26,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:58:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:58:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:26,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:58:26,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967788752] [2021-05-22 02:58:26,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967788752] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:26,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847309495] [2021-05-22 02:58:26,573 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 [2021-05-22 02:58:26,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:58:26,596 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-22 02:58:26,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:58:27,322 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:27,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847309495] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:27,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:58:27,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-05-22 02:58:27,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839155824] [2021-05-22 02:58:27,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-22 02:58:27,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:58:27,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-22 02:58:27,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:58:27,323 INFO L87 Difference]: Start difference. First operand 4870 states and 11432 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:30,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:58:30,515 INFO L93 Difference]: Finished difference Result 5834 states and 13420 transitions. [2021-05-22 02:58:30,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-22 02:58:30,516 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 02:58:30,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:58:30,521 INFO L225 Difference]: With dead ends: 5834 [2021-05-22 02:58:30,521 INFO L226 Difference]: Without dead ends: 5834 [2021-05-22 02:58:30,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2240 ImplicationChecksByTransitivity, 3140.9ms TimeCoverageRelationStatistics Valid=930, Invalid=6552, Unknown=0, NotChecked=0, Total=7482 [2021-05-22 02:58:30,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5834 states. [2021-05-22 02:58:30,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5834 to 4915. [2021-05-22 02:58:30,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4915 states, 4914 states have (on average 2.349409849409849) internal successors, (11545), 4914 states have internal predecessors, (11545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:30,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4915 states to 4915 states and 11545 transitions. [2021-05-22 02:58:30,571 INFO L78 Accepts]: Start accepts. Automaton has 4915 states and 11545 transitions. Word has length 37 [2021-05-22 02:58:30,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:58:30,572 INFO L482 AbstractCegarLoop]: Abstraction has 4915 states and 11545 transitions. [2021-05-22 02:58:30,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:30,572 INFO L276 IsEmpty]: Start isEmpty. Operand 4915 states and 11545 transitions. [2021-05-22 02:58:30,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:58:30,576 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:58:30,576 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:58:30,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1670,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:58:30,777 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:58:30,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:58:30,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1011930511, now seen corresponding path program 110 times [2021-05-22 02:58:30,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:58:30,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184634235] [2021-05-22 02:58:30,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:58:30,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:58:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:31,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:58:31,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184634235] [2021-05-22 02:58:31,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184634235] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:31,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584435807] [2021-05-22 02:58:31,119 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 [2021-05-22 02:58:31,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:58:31,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:58:31,148 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-22 02:58:31,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:58:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:31,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584435807] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:31,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:58:31,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2021-05-22 02:58:31,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064579113] [2021-05-22 02:58:31,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-22 02:58:31,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:58:31,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-22 02:58:31,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:58:31,761 INFO L87 Difference]: Start difference. First operand 4915 states and 11545 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:34,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:58:34,737 INFO L93 Difference]: Finished difference Result 5198 states and 12074 transitions. [2021-05-22 02:58:34,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-22 02:58:34,738 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 02:58:34,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:58:34,743 INFO L225 Difference]: With dead ends: 5198 [2021-05-22 02:58:34,743 INFO L226 Difference]: Without dead ends: 5194 [2021-05-22 02:58:34,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1577 ImplicationChecksByTransitivity, 2830.0ms TimeCoverageRelationStatistics Valid=695, Invalid=5467, Unknown=0, NotChecked=0, Total=6162 [2021-05-22 02:58:34,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5194 states. [2021-05-22 02:58:34,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5194 to 4902. [2021-05-22 02:58:34,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4902 states, 4901 states have (on average 2.3472760661089573) internal successors, (11504), 4901 states have internal predecessors, (11504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:34,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4902 states to 4902 states and 11504 transitions. [2021-05-22 02:58:34,800 INFO L78 Accepts]: Start accepts. Automaton has 4902 states and 11504 transitions. Word has length 37 [2021-05-22 02:58:34,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:58:34,800 INFO L482 AbstractCegarLoop]: Abstraction has 4902 states and 11504 transitions. [2021-05-22 02:58:34,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:34,801 INFO L276 IsEmpty]: Start isEmpty. Operand 4902 states and 11504 transitions. [2021-05-22 02:58:34,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:58:34,806 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:58:34,806 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:58:35,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1695 [2021-05-22 02:58:35,006 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:58:35,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:58:35,007 INFO L82 PathProgramCache]: Analyzing trace with hash 783554167, now seen corresponding path program 111 times [2021-05-22 02:58:35,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:58:35,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606820452] [2021-05-22 02:58:35,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:58:35,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:58:35,256 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:35,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:58:35,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606820452] [2021-05-22 02:58:35,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606820452] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:35,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136717683] [2021-05-22 02:58:35,256 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 [2021-05-22 02:58:35,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-22 02:58:35,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:58:35,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-22 02:58:35,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:58:35,637 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:35,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136717683] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:35,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:58:35,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 32 [2021-05-22 02:58:35,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262646876] [2021-05-22 02:58:35,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-22 02:58:35,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:58:35,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-22 02:58:35,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:58:35,639 INFO L87 Difference]: Start difference. First operand 4902 states and 11504 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:38,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:58:38,441 INFO L93 Difference]: Finished difference Result 6564 states and 15090 transitions. [2021-05-22 02:58:38,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-22 02:58:38,441 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:58:38,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:58:38,447 INFO L225 Difference]: With dead ends: 6564 [2021-05-22 02:58:38,447 INFO L226 Difference]: Without dead ends: 6360 [2021-05-22 02:58:38,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2172 ImplicationChecksByTransitivity, 2357.2ms TimeCoverageRelationStatistics Valid=758, Invalid=7432, Unknown=0, NotChecked=0, Total=8190 [2021-05-22 02:58:38,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6360 states. [2021-05-22 02:58:38,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6360 to 5277. [2021-05-22 02:58:38,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5277 states, 5276 states have (on average 2.3421152388172857) internal successors, (12357), 5276 states have internal predecessors, (12357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:38,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5277 states to 5277 states and 12357 transitions. [2021-05-22 02:58:38,506 INFO L78 Accepts]: Start accepts. Automaton has 5277 states and 12357 transitions. Word has length 37 [2021-05-22 02:58:38,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:58:38,506 INFO L482 AbstractCegarLoop]: Abstraction has 5277 states and 12357 transitions. [2021-05-22 02:58:38,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:38,506 INFO L276 IsEmpty]: Start isEmpty. Operand 5277 states and 12357 transitions. [2021-05-22 02:58:38,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:58:38,510 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:58:38,510 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:58:38,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1715 [2021-05-22 02:58:38,711 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:58:38,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:58:38,711 INFO L82 PathProgramCache]: Analyzing trace with hash -136117129, now seen corresponding path program 112 times [2021-05-22 02:58:38,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:58:38,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679336153] [2021-05-22 02:58:38,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:58:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:58:39,017 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:39,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:58:39,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679336153] [2021-05-22 02:58:39,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679336153] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:39,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005256259] [2021-05-22 02:58:39,018 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 [2021-05-22 02:58:39,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:58:39,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:58:39,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:58:39,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:58:39,703 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:39,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005256259] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:39,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:58:39,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 31 [2021-05-22 02:58:39,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727595389] [2021-05-22 02:58:39,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-22 02:58:39,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:58:39,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-22 02:58:39,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:58:39,704 INFO L87 Difference]: Start difference. First operand 5277 states and 12357 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 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) [2021-05-22 02:58:42,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:58:42,574 INFO L93 Difference]: Finished difference Result 7190 states and 16637 transitions. [2021-05-22 02:58:42,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-22 02:58:42,574 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 02:58:42,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:58:42,581 INFO L225 Difference]: With dead ends: 7190 [2021-05-22 02:58:42,581 INFO L226 Difference]: Without dead ends: 7127 [2021-05-22 02:58:42,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 2680.7ms TimeCoverageRelationStatistics Valid=766, Invalid=4784, Unknown=0, NotChecked=0, Total=5550 [2021-05-22 02:58:42,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7127 states. [2021-05-22 02:58:42,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7127 to 5386. [2021-05-22 02:58:42,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5386 states, 5385 states have (on average 2.337418755803157) internal successors, (12587), 5385 states have internal predecessors, (12587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:42,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5386 states to 5386 states and 12587 transitions. [2021-05-22 02:58:42,641 INFO L78 Accepts]: Start accepts. Automaton has 5386 states and 12587 transitions. Word has length 37 [2021-05-22 02:58:42,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:58:42,642 INFO L482 AbstractCegarLoop]: Abstraction has 5386 states and 12587 transitions. [2021-05-22 02:58:42,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 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) [2021-05-22 02:58:42,642 INFO L276 IsEmpty]: Start isEmpty. Operand 5386 states and 12587 transitions. [2021-05-22 02:58:42,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:58:42,646 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:58:42,646 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:58:42,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1730 [2021-05-22 02:58:42,847 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:58:42,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:58:42,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1645417915, now seen corresponding path program 113 times [2021-05-22 02:58:42,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:58:42,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326923489] [2021-05-22 02:58:42,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:58:42,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:58:43,366 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:43,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:58:43,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326923489] [2021-05-22 02:58:43,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326923489] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:43,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088976837] [2021-05-22 02:58:43,367 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 [2021-05-22 02:58:43,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-22 02:58:43,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:58:43,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:58:43,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:58:44,507 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:44,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088976837] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:44,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:58:44,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 31 [2021-05-22 02:58:44,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493002204] [2021-05-22 02:58:44,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-22 02:58:44,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:58:44,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-22 02:58:44,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:58:44,508 INFO L87 Difference]: Start difference. First operand 5386 states and 12587 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 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) [2021-05-22 02:58:48,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:58:48,334 INFO L93 Difference]: Finished difference Result 7812 states and 17955 transitions. [2021-05-22 02:58:48,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-22 02:58:48,334 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 02:58:48,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:58:48,344 INFO L225 Difference]: With dead ends: 7812 [2021-05-22 02:58:48,344 INFO L226 Difference]: Without dead ends: 7773 [2021-05-22 02:58:48,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2156 ImplicationChecksByTransitivity, 4059.9ms TimeCoverageRelationStatistics Valid=993, Invalid=6147, Unknown=0, NotChecked=0, Total=7140 [2021-05-22 02:58:48,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7773 states. [2021-05-22 02:58:48,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7773 to 5464. [2021-05-22 02:58:48,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5464 states, 5463 states have (on average 2.33479773018488) internal successors, (12755), 5463 states have internal predecessors, (12755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:48,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5464 states to 5464 states and 12755 transitions. [2021-05-22 02:58:48,447 INFO L78 Accepts]: Start accepts. Automaton has 5464 states and 12755 transitions. Word has length 37 [2021-05-22 02:58:48,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:58:48,447 INFO L482 AbstractCegarLoop]: Abstraction has 5464 states and 12755 transitions. [2021-05-22 02:58:48,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 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) [2021-05-22 02:58:48,448 INFO L276 IsEmpty]: Start isEmpty. Operand 5464 states and 12755 transitions. [2021-05-22 02:58:48,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:58:48,454 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:58:48,454 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:58:48,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1754 [2021-05-22 02:58:48,677 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:58:48,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:58:48,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1356769279, now seen corresponding path program 114 times [2021-05-22 02:58:48,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:58:48,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461763493] [2021-05-22 02:58:48,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:58:48,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:58:49,011 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:49,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:58:49,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461763493] [2021-05-22 02:58:49,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461763493] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:49,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862262429] [2021-05-22 02:58:49,011 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 [2021-05-22 02:58:49,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 02:58:49,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:58:49,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:58:49,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:58:49,705 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:49,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862262429] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:49,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:58:49,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 32 [2021-05-22 02:58:49,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96796143] [2021-05-22 02:58:49,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:58:49,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:58:49,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:58:49,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:58:49,707 INFO L87 Difference]: Start difference. First operand 5464 states and 12755 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 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) [2021-05-22 02:58:53,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:58:53,748 INFO L93 Difference]: Finished difference Result 7788 states and 17905 transitions. [2021-05-22 02:58:53,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-22 02:58:53,749 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 02:58:53,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:58:53,756 INFO L225 Difference]: With dead ends: 7788 [2021-05-22 02:58:53,756 INFO L226 Difference]: Without dead ends: 7746 [2021-05-22 02:58:53,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2989 ImplicationChecksByTransitivity, 3845.5ms TimeCoverageRelationStatistics Valid=1316, Invalid=7614, Unknown=0, NotChecked=0, Total=8930 [2021-05-22 02:58:53,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7746 states. [2021-05-22 02:58:53,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7746 to 5484. [2021-05-22 02:58:53,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5484 states, 5483 states have (on average 2.335400328287434) internal successors, (12805), 5483 states have internal predecessors, (12805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:53,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5484 states to 5484 states and 12805 transitions. [2021-05-22 02:58:53,823 INFO L78 Accepts]: Start accepts. Automaton has 5484 states and 12805 transitions. Word has length 37 [2021-05-22 02:58:53,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:58:53,823 INFO L482 AbstractCegarLoop]: Abstraction has 5484 states and 12805 transitions. [2021-05-22 02:58:53,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 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) [2021-05-22 02:58:53,823 INFO L276 IsEmpty]: Start isEmpty. Operand 5484 states and 12805 transitions. [2021-05-22 02:58:53,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:58:53,827 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:58:53,827 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:58:54,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1774,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:58:54,028 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:58:54,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:58:54,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1945861701, now seen corresponding path program 115 times [2021-05-22 02:58:54,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:58:54,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044246189] [2021-05-22 02:58:54,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:58:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:58:54,233 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:54,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:58:54,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044246189] [2021-05-22 02:58:54,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044246189] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:54,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71867723] [2021-05-22 02:58:54,233 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 [2021-05-22 02:58:54,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:58:54,256 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-22 02:58:54,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:58:54,829 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:54,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71867723] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:54,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:58:54,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-05-22 02:58:54,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500293907] [2021-05-22 02:58:54,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:58:54,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:58:54,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:58:54,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:58:54,830 INFO L87 Difference]: Start difference. First operand 5484 states and 12805 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:57,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:58:57,287 INFO L93 Difference]: Finished difference Result 5965 states and 13762 transitions. [2021-05-22 02:58:57,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-22 02:58:57,287 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:58:57,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:58:57,293 INFO L225 Difference]: With dead ends: 5965 [2021-05-22 02:58:57,293 INFO L226 Difference]: Without dead ends: 5935 [2021-05-22 02:58:57,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2182.0ms TimeCoverageRelationStatistics Valid=658, Invalid=6148, Unknown=0, NotChecked=0, Total=6806 [2021-05-22 02:58:57,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5935 states. [2021-05-22 02:58:57,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5935 to 5492. [2021-05-22 02:58:57,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5492 states, 5491 states have (on average 2.3352759060280457) internal successors, (12823), 5491 states have internal predecessors, (12823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:57,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5492 states to 5492 states and 12823 transitions. [2021-05-22 02:58:57,360 INFO L78 Accepts]: Start accepts. Automaton has 5492 states and 12823 transitions. Word has length 37 [2021-05-22 02:58:57,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:58:57,360 INFO L482 AbstractCegarLoop]: Abstraction has 5492 states and 12823 transitions. [2021-05-22 02:58:57,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:58:57,361 INFO L276 IsEmpty]: Start isEmpty. Operand 5492 states and 12823 transitions. [2021-05-22 02:58:57,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:58:57,365 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:58:57,365 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:58:57,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1794 [2021-05-22 02:58:57,566 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:58:57,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:58:57,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1113437185, now seen corresponding path program 116 times [2021-05-22 02:58:57,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:58:57,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207582991] [2021-05-22 02:58:57,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:58:57,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:58:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:57,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:58:57,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207582991] [2021-05-22 02:58:57,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207582991] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:57,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099672314] [2021-05-22 02:58:57,770 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 [2021-05-22 02:58:57,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:58:57,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:58:57,795 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-22 02:58:57,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:58:58,405 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:58:58,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099672314] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:58:58,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:58:58,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-05-22 02:58:58,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225610833] [2021-05-22 02:58:58,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:58:58,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:58:58,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:58:58,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1143, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:58:58,407 INFO L87 Difference]: Start difference. First operand 5492 states and 12823 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:01,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:59:01,280 INFO L93 Difference]: Finished difference Result 5816 states and 13464 transitions. [2021-05-22 02:59:01,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-22 02:59:01,281 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:59:01,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:59:01,287 INFO L225 Difference]: With dead ends: 5816 [2021-05-22 02:59:01,287 INFO L226 Difference]: Without dead ends: 5798 [2021-05-22 02:59:01,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2285 ImplicationChecksByTransitivity, 2602.4ms TimeCoverageRelationStatistics Valid=700, Invalid=7132, Unknown=0, NotChecked=0, Total=7832 [2021-05-22 02:59:01,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5798 states. [2021-05-22 02:59:01,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5798 to 5502. [2021-05-22 02:59:01,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5502 states, 5501 states have (on average 2.335393564806399) internal successors, (12847), 5501 states have internal predecessors, (12847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:01,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5502 states to 5502 states and 12847 transitions. [2021-05-22 02:59:01,351 INFO L78 Accepts]: Start accepts. Automaton has 5502 states and 12847 transitions. Word has length 37 [2021-05-22 02:59:01,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:59:01,352 INFO L482 AbstractCegarLoop]: Abstraction has 5502 states and 12847 transitions. [2021-05-22 02:59:01,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:01,352 INFO L276 IsEmpty]: Start isEmpty. Operand 5502 states and 12847 transitions. [2021-05-22 02:59:01,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:59:01,357 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:59:01,357 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:59:01,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1808 [2021-05-22 02:59:01,559 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:59:01,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:59:01,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1242179773, now seen corresponding path program 117 times [2021-05-22 02:59:01,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:59:01,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746809961] [2021-05-22 02:59:01,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:59:01,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:59:01,806 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:01,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:59:01,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746809961] [2021-05-22 02:59:01,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746809961] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:01,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193242951] [2021-05-22 02:59:01,806 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 [2021-05-22 02:59:01,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-22 02:59:01,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:59:01,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:59:01,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:59:02,333 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:02,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193242951] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:02,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:59:02,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-05-22 02:59:02,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629748024] [2021-05-22 02:59:02,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 02:59:02,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:59:02,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 02:59:02,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1096, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:59:02,334 INFO L87 Difference]: Start difference. First operand 5502 states and 12847 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:13,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:59:13,698 INFO L93 Difference]: Finished difference Result 7773 states and 17514 transitions. [2021-05-22 02:59:13,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 221 states. [2021-05-22 02:59:13,698 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 02:59:13,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:59:13,705 INFO L225 Difference]: With dead ends: 7773 [2021-05-22 02:59:13,705 INFO L226 Difference]: Without dead ends: 7761 [2021-05-22 02:59:13,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22159 ImplicationChecksByTransitivity, 9928.3ms TimeCoverageRelationStatistics Valid=4256, Invalid=51676, Unknown=0, NotChecked=0, Total=55932 [2021-05-22 02:59:13,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7761 states. [2021-05-22 02:59:13,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7761 to 5514. [2021-05-22 02:59:13,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5514 states, 5513 states have (on average 2.3359332486849267) internal successors, (12878), 5513 states have internal predecessors, (12878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:13,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5514 states to 5514 states and 12878 transitions. [2021-05-22 02:59:13,770 INFO L78 Accepts]: Start accepts. Automaton has 5514 states and 12878 transitions. Word has length 37 [2021-05-22 02:59:13,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:59:13,771 INFO L482 AbstractCegarLoop]: Abstraction has 5514 states and 12878 transitions. [2021-05-22 02:59:13,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:13,771 INFO L276 IsEmpty]: Start isEmpty. Operand 5514 states and 12878 transitions. [2021-05-22 02:59:13,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:59:13,775 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:59:13,775 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:59:13,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1823,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:59:13,976 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:59:13,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:59:13,976 INFO L82 PathProgramCache]: Analyzing trace with hash -592110803, now seen corresponding path program 118 times [2021-05-22 02:59:13,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:59:13,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89749211] [2021-05-22 02:59:13,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:59:13,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:59:14,182 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:14,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:59:14,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89749211] [2021-05-22 02:59:14,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89749211] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:14,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061374864] [2021-05-22 02:59:14,183 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 [2021-05-22 02:59:14,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:59:14,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:59:14,218 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-22 02:59:14,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:59:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:14,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061374864] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:14,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:59:14,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-05-22 02:59:14,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43006840] [2021-05-22 02:59:14,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:59:14,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:59:14,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:59:14,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1138, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:59:14,836 INFO L87 Difference]: Start difference. First operand 5514 states and 12878 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 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) [2021-05-22 02:59:17,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:59:17,342 INFO L93 Difference]: Finished difference Result 5766 states and 13384 transitions. [2021-05-22 02:59:17,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-22 02:59:17,343 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 02:59:17,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:59:17,348 INFO L225 Difference]: With dead ends: 5766 [2021-05-22 02:59:17,348 INFO L226 Difference]: Without dead ends: 5766 [2021-05-22 02:59:17,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 2421.8ms TimeCoverageRelationStatistics Valid=572, Invalid=4978, Unknown=0, NotChecked=0, Total=5550 [2021-05-22 02:59:17,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5766 states. [2021-05-22 02:59:17,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5766 to 5511. [2021-05-22 02:59:17,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5511 states, 5510 states have (on average 2.3364791288566242) internal successors, (12874), 5510 states have internal predecessors, (12874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:17,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5511 states to 5511 states and 12874 transitions. [2021-05-22 02:59:17,403 INFO L78 Accepts]: Start accepts. Automaton has 5511 states and 12874 transitions. Word has length 37 [2021-05-22 02:59:17,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:59:17,403 INFO L482 AbstractCegarLoop]: Abstraction has 5511 states and 12874 transitions. [2021-05-22 02:59:17,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 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) [2021-05-22 02:59:17,403 INFO L276 IsEmpty]: Start isEmpty. Operand 5511 states and 12874 transitions. [2021-05-22 02:59:17,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:59:17,407 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:59:17,407 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:59:17,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1847 [2021-05-22 02:59:17,607 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:59:17,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:59:17,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1231736695, now seen corresponding path program 119 times [2021-05-22 02:59:17,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:59:17,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282856209] [2021-05-22 02:59:17,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:59:17,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:59:17,825 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:17,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:59:17,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282856209] [2021-05-22 02:59:17,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282856209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:17,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931729371] [2021-05-22 02:59:17,825 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 [2021-05-22 02:59:17,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-22 02:59:17,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:59:17,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:59:17,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:59:18,563 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:18,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931729371] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:18,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:59:18,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-05-22 02:59:18,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019550946] [2021-05-22 02:59:18,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:59:18,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:59:18,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:59:18,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1241, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:59:18,564 INFO L87 Difference]: Start difference. First operand 5511 states and 12874 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:22,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:59:22,676 INFO L93 Difference]: Finished difference Result 6342 states and 14521 transitions. [2021-05-22 02:59:22,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-22 02:59:22,676 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 02:59:22,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:59:22,681 INFO L225 Difference]: With dead ends: 6342 [2021-05-22 02:59:22,681 INFO L226 Difference]: Without dead ends: 6285 [2021-05-22 02:59:22,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3248 ImplicationChecksByTransitivity, 3667.4ms TimeCoverageRelationStatistics Valid=895, Invalid=10877, Unknown=0, NotChecked=0, Total=11772 [2021-05-22 02:59:22,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6285 states. [2021-05-22 02:59:22,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6285 to 5541. [2021-05-22 02:59:22,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5541 states, 5540 states have (on average 2.334657039711191) internal successors, (12934), 5540 states have internal predecessors, (12934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:22,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5541 states to 5541 states and 12934 transitions. [2021-05-22 02:59:22,734 INFO L78 Accepts]: Start accepts. Automaton has 5541 states and 12934 transitions. Word has length 37 [2021-05-22 02:59:22,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:59:22,734 INFO L482 AbstractCegarLoop]: Abstraction has 5541 states and 12934 transitions. [2021-05-22 02:59:22,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:22,734 INFO L276 IsEmpty]: Start isEmpty. Operand 5541 states and 12934 transitions. [2021-05-22 02:59:22,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:59:22,739 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:59:22,739 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:59:22,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1861 [2021-05-22 02:59:22,940 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:59:22,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:59:22,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1935418623, now seen corresponding path program 120 times [2021-05-22 02:59:22,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:59:22,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901902294] [2021-05-22 02:59:22,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:59:22,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:59:23,158 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:23,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:59:23,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901902294] [2021-05-22 02:59:23,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901902294] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:23,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922473850] [2021-05-22 02:59:23,159 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 [2021-05-22 02:59:23,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 02:59:23,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:59:23,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-22 02:59:23,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:59:23,666 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:23,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922473850] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:23,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:59:23,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 35 [2021-05-22 02:59:23,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781902223] [2021-05-22 02:59:23,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:59:23,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:59:23,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:59:23,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1160, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:59:23,667 INFO L87 Difference]: Start difference. First operand 5541 states and 12934 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:37,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:59:37,533 INFO L93 Difference]: Finished difference Result 8099 states and 18208 transitions. [2021-05-22 02:59:37,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 286 states. [2021-05-22 02:59:37,533 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 02:59:37,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:59:37,540 INFO L225 Difference]: With dead ends: 8099 [2021-05-22 02:59:37,540 INFO L226 Difference]: Without dead ends: 8087 [2021-05-22 02:59:37,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37586 ImplicationChecksByTransitivity, 12242.9ms TimeCoverageRelationStatistics Valid=6402, Invalid=84500, Unknown=0, NotChecked=0, Total=90902 [2021-05-22 02:59:37,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8087 states. [2021-05-22 02:59:37,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8087 to 5547. [2021-05-22 02:59:37,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5547 states, 5546 states have (on average 2.3348359177785794) internal successors, (12949), 5546 states have internal predecessors, (12949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:37,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5547 states to 5547 states and 12949 transitions. [2021-05-22 02:59:37,607 INFO L78 Accepts]: Start accepts. Automaton has 5547 states and 12949 transitions. Word has length 37 [2021-05-22 02:59:37,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:59:37,607 INFO L482 AbstractCegarLoop]: Abstraction has 5547 states and 12949 transitions. [2021-05-22 02:59:37,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:37,607 INFO L276 IsEmpty]: Start isEmpty. Operand 5547 states and 12949 transitions. [2021-05-22 02:59:37,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:59:37,612 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:59:37,612 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:59:37,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1881 [2021-05-22 02:59:37,814 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:59:37,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:59:37,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1709479703, now seen corresponding path program 121 times [2021-05-22 02:59:37,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:59:37,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701156287] [2021-05-22 02:59:37,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:59:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:59:38,031 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:38,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:59:38,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701156287] [2021-05-22 02:59:38,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701156287] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:38,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479879827] [2021-05-22 02:59:38,031 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 [2021-05-22 02:59:38,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:59:38,054 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-22 02:59:38,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:59:38,717 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:38,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479879827] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:38,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:59:38,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-22 02:59:38,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706133821] [2021-05-22 02:59:38,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 02:59:38,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:59:38,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 02:59:38,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1143, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:59:38,718 INFO L87 Difference]: Start difference. First operand 5547 states and 12949 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 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) [2021-05-22 02:59:42,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:59:42,014 INFO L93 Difference]: Finished difference Result 6293 states and 14448 transitions. [2021-05-22 02:59:42,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-22 02:59:42,014 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 02:59:42,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:59:42,020 INFO L225 Difference]: With dead ends: 6293 [2021-05-22 02:59:42,020 INFO L226 Difference]: Without dead ends: 6284 [2021-05-22 02:59:42,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2326 ImplicationChecksByTransitivity, 2859.2ms TimeCoverageRelationStatistics Valid=749, Invalid=7623, Unknown=0, NotChecked=0, Total=8372 [2021-05-22 02:59:42,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6284 states. [2021-05-22 02:59:42,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6284 to 5583. [2021-05-22 02:59:42,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5583 states, 5582 states have (on average 2.3350053744177712) internal successors, (13034), 5582 states have internal predecessors, (13034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:42,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5583 states to 5583 states and 13034 transitions. [2021-05-22 02:59:42,086 INFO L78 Accepts]: Start accepts. Automaton has 5583 states and 13034 transitions. Word has length 37 [2021-05-22 02:59:42,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:59:42,086 INFO L482 AbstractCegarLoop]: Abstraction has 5583 states and 13034 transitions. [2021-05-22 02:59:42,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 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) [2021-05-22 02:59:42,086 INFO L276 IsEmpty]: Start isEmpty. Operand 5583 states and 13034 transitions. [2021-05-22 02:59:42,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:59:42,091 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:59:42,091 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:59:42,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1910 [2021-05-22 02:59:42,292 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:59:42,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:59:42,292 INFO L82 PathProgramCache]: Analyzing trace with hash 956173311, now seen corresponding path program 122 times [2021-05-22 02:59:42,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:59:42,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135752447] [2021-05-22 02:59:42,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:59:42,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:59:42,506 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:42,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:59:42,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135752447] [2021-05-22 02:59:42,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135752447] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:42,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669255963] [2021-05-22 02:59:42,507 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 [2021-05-22 02:59:42,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:59:42,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:59:42,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:59:42,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:59:43,072 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:43,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669255963] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:43,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:59:43,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 31 [2021-05-22 02:59:43,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923562626] [2021-05-22 02:59:43,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-22 02:59:43,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:59:43,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-22 02:59:43,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:59:43,073 INFO L87 Difference]: Start difference. First operand 5583 states and 13034 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 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) [2021-05-22 02:59:46,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:59:46,528 INFO L93 Difference]: Finished difference Result 7671 states and 17703 transitions. [2021-05-22 02:59:46,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-22 02:59:46,528 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 02:59:46,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:59:46,535 INFO L225 Difference]: With dead ends: 7671 [2021-05-22 02:59:46,535 INFO L226 Difference]: Without dead ends: 7636 [2021-05-22 02:59:46,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2881 ImplicationChecksByTransitivity, 3244.4ms TimeCoverageRelationStatistics Valid=1319, Invalid=6871, Unknown=0, NotChecked=0, Total=8190 [2021-05-22 02:59:46,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7636 states. [2021-05-22 02:59:46,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7636 to 5598. [2021-05-22 02:59:46,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5598 states, 5597 states have (on average 2.3353582276219402) internal successors, (13071), 5597 states have internal predecessors, (13071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:46,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5598 states to 5598 states and 13071 transitions. [2021-05-22 02:59:46,598 INFO L78 Accepts]: Start accepts. Automaton has 5598 states and 13071 transitions. Word has length 37 [2021-05-22 02:59:46,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:59:46,598 INFO L482 AbstractCegarLoop]: Abstraction has 5598 states and 13071 transitions. [2021-05-22 02:59:46,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 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) [2021-05-22 02:59:46,598 INFO L276 IsEmpty]: Start isEmpty. Operand 5598 states and 13071 transitions. [2021-05-22 02:59:46,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:59:46,602 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:59:46,602 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:59:46,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1928,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:59:46,803 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:59:46,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:59:46,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1447643043, now seen corresponding path program 123 times [2021-05-22 02:59:46,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:59:46,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244016721] [2021-05-22 02:59:46,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:59:46,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:59:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:46,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:59:46,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244016721] [2021-05-22 02:59:46,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244016721] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:46,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039335897] [2021-05-22 02:59:46,973 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 [2021-05-22 02:59:46,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-22 02:59:46,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:59:46,999 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-22 02:59:47,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:59:47,388 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:59:47,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039335897] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:47,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:59:47,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2021-05-22 02:59:47,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539344227] [2021-05-22 02:59:47,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-22 02:59:47,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:59:47,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-22 02:59:47,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:59:47,389 INFO L87 Difference]: Start difference. First operand 5598 states and 13071 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-05-22 02:59:47,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:59:47,985 INFO L93 Difference]: Finished difference Result 6845 states and 15895 transitions. [2021-05-22 02:59:47,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-22 02:59:47,986 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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 37 [2021-05-22 02:59:47,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:59:47,993 INFO L225 Difference]: With dead ends: 6845 [2021-05-22 02:59:47,993 INFO L226 Difference]: Without dead ends: 6841 [2021-05-22 02:59:47,993 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 731.2ms TimeCoverageRelationStatistics Valid=406, Invalid=1664, Unknown=0, NotChecked=0, Total=2070 [2021-05-22 02:59:47,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6841 states. [2021-05-22 02:59:48,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6841 to 5631. [2021-05-22 02:59:48,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5631 states, 5630 states have (on average 2.3408525754884546) internal successors, (13179), 5630 states have internal predecessors, (13179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:48,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5631 states to 5631 states and 13179 transitions. [2021-05-22 02:59:48,062 INFO L78 Accepts]: Start accepts. Automaton has 5631 states and 13179 transitions. Word has length 37 [2021-05-22 02:59:48,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:59:48,062 INFO L482 AbstractCegarLoop]: Abstraction has 5631 states and 13179 transitions. [2021-05-22 02:59:48,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-05-22 02:59:48,063 INFO L276 IsEmpty]: Start isEmpty. Operand 5631 states and 13179 transitions. [2021-05-22 02:59:48,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:59:48,068 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:59:48,068 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:59:48,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1950 [2021-05-22 02:59:48,270 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:59:48,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:59:48,270 INFO L82 PathProgramCache]: Analyzing trace with hash 2142478777, now seen corresponding path program 124 times [2021-05-22 02:59:48,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:59:48,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850190337] [2021-05-22 02:59:48,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:59:48,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:59:48,517 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:48,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:59:48,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850190337] [2021-05-22 02:59:48,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850190337] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:48,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736958280] [2021-05-22 02:59:48,517 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 [2021-05-22 02:59:48,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:59:48,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:59:48,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:59:48,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:59:49,049 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:49,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736958280] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:49,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:59:49,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 32 [2021-05-22 02:59:49,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023168329] [2021-05-22 02:59:49,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 02:59:49,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:59:49,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 02:59:49,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:59:49,050 INFO L87 Difference]: Start difference. First operand 5631 states and 13179 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 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) [2021-05-22 02:59:52,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:59:52,454 INFO L93 Difference]: Finished difference Result 8549 states and 19665 transitions. [2021-05-22 02:59:52,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-22 02:59:52,454 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 02:59:52,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:59:52,462 INFO L225 Difference]: With dead ends: 8549 [2021-05-22 02:59:52,463 INFO L226 Difference]: Without dead ends: 8498 [2021-05-22 02:59:52,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 3173.4ms TimeCoverageRelationStatistics Valid=959, Invalid=5683, Unknown=0, NotChecked=0, Total=6642 [2021-05-22 02:59:52,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8498 states. [2021-05-22 02:59:52,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8498 to 5868. [2021-05-22 02:59:52,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5868 states, 5867 states have (on average 2.3441281745355376) internal successors, (13753), 5867 states have internal predecessors, (13753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:52,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5868 states to 5868 states and 13753 transitions. [2021-05-22 02:59:52,538 INFO L78 Accepts]: Start accepts. Automaton has 5868 states and 13753 transitions. Word has length 37 [2021-05-22 02:59:52,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:59:52,538 INFO L482 AbstractCegarLoop]: Abstraction has 5868 states and 13753 transitions. [2021-05-22 02:59:52,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 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) [2021-05-22 02:59:52,538 INFO L276 IsEmpty]: Start isEmpty. Operand 5868 states and 13753 transitions. [2021-05-22 02:59:52,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:59:52,542 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:59:52,542 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:59:52,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1967,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:59:52,743 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:59:52,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:59:52,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1847263995, now seen corresponding path program 125 times [2021-05-22 02:59:52,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:59:52,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056280178] [2021-05-22 02:59:52,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:59:52,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:59:53,031 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:53,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:59:53,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056280178] [2021-05-22 02:59:53,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056280178] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:53,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270787021] [2021-05-22 02:59:53,032 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 [2021-05-22 02:59:53,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-22 02:59:53,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:59:53,056 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:59:53,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:59:53,770 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:53,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270787021] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:53,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:59:53,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-22 02:59:53,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992072729] [2021-05-22 02:59:53,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:59:53,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:59:53,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:59:53,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1211, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:59:53,772 INFO L87 Difference]: Start difference. First operand 5868 states and 13753 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:55,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:59:55,725 INFO L93 Difference]: Finished difference Result 6341 states and 14705 transitions. [2021-05-22 02:59:55,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-22 02:59:55,725 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2021-05-22 02:59:55,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:59:55,731 INFO L225 Difference]: With dead ends: 6341 [2021-05-22 02:59:55,731 INFO L226 Difference]: Without dead ends: 6287 [2021-05-22 02:59:55,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 2199.3ms TimeCoverageRelationStatistics Valid=431, Invalid=4971, Unknown=0, NotChecked=0, Total=5402 [2021-05-22 02:59:55,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6287 states. [2021-05-22 02:59:55,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6287 to 6016. [2021-05-22 02:59:55,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6016 states, 6015 states have (on average 2.342975893599335) internal successors, (14093), 6015 states have internal predecessors, (14093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:55,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6016 states to 6016 states and 14093 transitions. [2021-05-22 02:59:55,789 INFO L78 Accepts]: Start accepts. Automaton has 6016 states and 14093 transitions. Word has length 37 [2021-05-22 02:59:55,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:59:55,790 INFO L482 AbstractCegarLoop]: Abstraction has 6016 states and 14093 transitions. [2021-05-22 02:59:55,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:59:55,790 INFO L276 IsEmpty]: Start isEmpty. Operand 6016 states and 14093 transitions. [2021-05-22 02:59:55,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 02:59:55,795 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:59:55,795 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:59:55,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1989 [2021-05-22 02:59:55,997 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:59:55,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:59:55,997 INFO L82 PathProgramCache]: Analyzing trace with hash -321497981, now seen corresponding path program 126 times [2021-05-22 02:59:55,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:59:55,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631148278] [2021-05-22 02:59:55,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:59:56,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:59:56,288 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:56,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:59:56,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631148278] [2021-05-22 02:59:56,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631148278] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:56,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455854257] [2021-05-22 02:59:56,289 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 [2021-05-22 02:59:56,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 02:59:56,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:59:56,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-22 02:59:56,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:59:57,036 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:59:57,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455854257] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:59:57,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:59:57,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-05-22 02:59:57,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372754496] [2021-05-22 02:59:57,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 02:59:57,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:59:57,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 02:59:57,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1244, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:59:57,037 INFO L87 Difference]: Start difference. First operand 6016 states and 14093 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:01,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:00:01,201 INFO L93 Difference]: Finished difference Result 6444 states and 14954 transitions. [2021-05-22 03:00:01,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-22 03:00:01,202 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 03:00:01,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:00:01,207 INFO L225 Difference]: With dead ends: 6444 [2021-05-22 03:00:01,207 INFO L226 Difference]: Without dead ends: 6408 [2021-05-22 03:00:01,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2669 ImplicationChecksByTransitivity, 4062.4ms TimeCoverageRelationStatistics Valid=738, Invalid=9564, Unknown=0, NotChecked=0, Total=10302 [2021-05-22 03:00:01,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6408 states. [2021-05-22 03:00:01,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6408 to 6108. [2021-05-22 03:00:01,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6108 states, 6107 states have (on average 2.3430489602095954) internal successors, (14309), 6107 states have internal predecessors, (14309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:01,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6108 states to 6108 states and 14309 transitions. [2021-05-22 03:00:01,269 INFO L78 Accepts]: Start accepts. Automaton has 6108 states and 14309 transitions. Word has length 37 [2021-05-22 03:00:01,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:00:01,269 INFO L482 AbstractCegarLoop]: Abstraction has 6108 states and 14309 transitions. [2021-05-22 03:00:01,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:01,270 INFO L276 IsEmpty]: Start isEmpty. Operand 6108 states and 14309 transitions. [2021-05-22 03:00:01,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 03:00:01,275 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:00:01,275 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:00:01,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2002 [2021-05-22 03:00:01,477 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:00:01,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:00:01,477 INFO L82 PathProgramCache]: Analyzing trace with hash 510926535, now seen corresponding path program 127 times [2021-05-22 03:00:01,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:00:01,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794838215] [2021-05-22 03:00:01,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:00:01,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:00:01,767 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:01,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:00:01,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794838215] [2021-05-22 03:00:01,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794838215] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:01,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643100026] [2021-05-22 03:00:01,768 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 [2021-05-22 03:00:01,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:00:01,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-22 03:00:01,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:00:02,468 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:02,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643100026] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:02,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:00:02,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-05-22 03:00:02,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794615994] [2021-05-22 03:00:02,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 03:00:02,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:00:02,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 03:00:02,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1242, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 03:00:02,470 INFO L87 Difference]: Start difference. First operand 6108 states and 14309 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:07,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:00:07,002 INFO L93 Difference]: Finished difference Result 6490 states and 15036 transitions. [2021-05-22 03:00:07,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-22 03:00:07,003 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 03:00:07,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:00:07,009 INFO L225 Difference]: With dead ends: 6490 [2021-05-22 03:00:07,009 INFO L226 Difference]: Without dead ends: 6421 [2021-05-22 03:00:07,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3060 ImplicationChecksByTransitivity, 4296.1ms TimeCoverageRelationStatistics Valid=882, Invalid=10460, Unknown=0, NotChecked=0, Total=11342 [2021-05-22 03:00:07,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6421 states. [2021-05-22 03:00:07,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6421 to 6086. [2021-05-22 03:00:07,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6086 states, 6085 states have (on average 2.341988496302383) internal successors, (14251), 6085 states have internal predecessors, (14251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:07,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6086 states to 6086 states and 14251 transitions. [2021-05-22 03:00:07,083 INFO L78 Accepts]: Start accepts. Automaton has 6086 states and 14251 transitions. Word has length 37 [2021-05-22 03:00:07,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:00:07,083 INFO L482 AbstractCegarLoop]: Abstraction has 6086 states and 14251 transitions. [2021-05-22 03:00:07,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:07,083 INFO L276 IsEmpty]: Start isEmpty. Operand 6086 states and 14251 transitions. [2021-05-22 03:00:07,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 03:00:07,089 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:00:07,089 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:00:07,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2021,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:00:07,290 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:00:07,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:00:07,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1467229701, now seen corresponding path program 128 times [2021-05-22 03:00:07,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:00:07,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486944726] [2021-05-22 03:00:07,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:00:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:00:07,568 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:07,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:00:07,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486944726] [2021-05-22 03:00:07,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486944726] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:07,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822906648] [2021-05-22 03:00:07,569 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 [2021-05-22 03:00:07,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 03:00:07,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:00:07,598 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 03:00:07,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:00:08,369 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:08,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822906648] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:08,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:00:08,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-22 03:00:08,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623635841] [2021-05-22 03:00:08,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 03:00:08,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:00:08,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 03:00:08,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1213, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 03:00:08,371 INFO L87 Difference]: Start difference. First operand 6086 states and 14251 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:11,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:00:11,529 INFO L93 Difference]: Finished difference Result 6707 states and 15582 transitions. [2021-05-22 03:00:11,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-22 03:00:11,529 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2021-05-22 03:00:11,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:00:11,537 INFO L225 Difference]: With dead ends: 6707 [2021-05-22 03:00:11,537 INFO L226 Difference]: Without dead ends: 6707 [2021-05-22 03:00:11,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2481 ImplicationChecksByTransitivity, 3012.1ms TimeCoverageRelationStatistics Valid=745, Invalid=7627, Unknown=0, NotChecked=0, Total=8372 [2021-05-22 03:00:11,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6707 states. [2021-05-22 03:00:11,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6707 to 6194. [2021-05-22 03:00:11,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6194 states, 6193 states have (on average 2.3437752300984984) internal successors, (14515), 6193 states have internal predecessors, (14515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:11,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6194 states to 6194 states and 14515 transitions. [2021-05-22 03:00:11,619 INFO L78 Accepts]: Start accepts. Automaton has 6194 states and 14515 transitions. Word has length 37 [2021-05-22 03:00:11,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:00:11,619 INFO L482 AbstractCegarLoop]: Abstraction has 6194 states and 14515 transitions. [2021-05-22 03:00:11,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:11,619 INFO L276 IsEmpty]: Start isEmpty. Operand 6194 states and 14515 transitions. [2021-05-22 03:00:11,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 03:00:11,626 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:00:11,626 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:00:11,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2048 [2021-05-22 03:00:11,835 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:00:11,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:00:11,836 INFO L82 PathProgramCache]: Analyzing trace with hash -371186881, now seen corresponding path program 129 times [2021-05-22 03:00:11,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:00:11,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187141789] [2021-05-22 03:00:11,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:00:11,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:00:12,109 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:12,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:00:12,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187141789] [2021-05-22 03:00:12,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187141789] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:12,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176049706] [2021-05-22 03:00:12,109 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 [2021-05-22 03:00:12,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-22 03:00:12,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:00:12,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-22 03:00:12,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:00:12,791 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:12,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176049706] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:12,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:00:12,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-05-22 03:00:12,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587681827] [2021-05-22 03:00:12,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 03:00:12,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:00:12,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 03:00:12,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 03:00:12,792 INFO L87 Difference]: Start difference. First operand 6194 states and 14515 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:16,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:00:16,705 INFO L93 Difference]: Finished difference Result 6899 states and 15927 transitions. [2021-05-22 03:00:16,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-22 03:00:16,706 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 03:00:16,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:00:16,713 INFO L225 Difference]: With dead ends: 6899 [2021-05-22 03:00:16,713 INFO L226 Difference]: Without dead ends: 6848 [2021-05-22 03:00:16,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2881 ImplicationChecksByTransitivity, 3638.8ms TimeCoverageRelationStatistics Valid=676, Invalid=9626, Unknown=0, NotChecked=0, Total=10302 [2021-05-22 03:00:16,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6848 states. [2021-05-22 03:00:16,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6848 to 6222. [2021-05-22 03:00:16,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6222 states, 6221 states have (on average 2.344639125542517) internal successors, (14586), 6221 states have internal predecessors, (14586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:16,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6222 states to 6222 states and 14586 transitions. [2021-05-22 03:00:16,796 INFO L78 Accepts]: Start accepts. Automaton has 6222 states and 14586 transitions. Word has length 37 [2021-05-22 03:00:16,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:00:16,796 INFO L482 AbstractCegarLoop]: Abstraction has 6222 states and 14586 transitions. [2021-05-22 03:00:16,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:16,796 INFO L276 IsEmpty]: Start isEmpty. Operand 6222 states and 14586 transitions. [2021-05-22 03:00:16,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 03:00:16,802 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:00:16,802 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:00:17,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2070 [2021-05-22 03:00:17,002 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:00:17,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:00:17,003 INFO L82 PathProgramCache]: Analyzing trace with hash 461237635, now seen corresponding path program 130 times [2021-05-22 03:00:17,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:00:17,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891915784] [2021-05-22 03:00:17,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:00:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:00:17,309 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:17,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:00:17,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891915784] [2021-05-22 03:00:17,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891915784] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:17,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346149948] [2021-05-22 03:00:17,309 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 [2021-05-22 03:00:17,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 03:00:17,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:00:17,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-22 03:00:17,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:00:18,007 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:18,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346149948] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:18,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:00:18,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-05-22 03:00:18,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428232007] [2021-05-22 03:00:18,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 03:00:18,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:00:18,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 03:00:18,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1241, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 03:00:18,009 INFO L87 Difference]: Start difference. First operand 6222 states and 14586 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:23,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:00:23,463 INFO L93 Difference]: Finished difference Result 6675 states and 15477 transitions. [2021-05-22 03:00:23,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-05-22 03:00:23,464 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 03:00:23,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:00:23,470 INFO L225 Difference]: With dead ends: 6675 [2021-05-22 03:00:23,470 INFO L226 Difference]: Without dead ends: 6603 [2021-05-22 03:00:23,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4586 ImplicationChecksByTransitivity, 5111.0ms TimeCoverageRelationStatistics Valid=1103, Invalid=14397, Unknown=0, NotChecked=0, Total=15500 [2021-05-22 03:00:23,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6603 states. [2021-05-22 03:00:23,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6603 to 6260. [2021-05-22 03:00:23,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6260 states, 6259 states have (on average 2.3447835117430897) internal successors, (14676), 6259 states have internal predecessors, (14676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:23,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6260 states to 6260 states and 14676 transitions. [2021-05-22 03:00:23,541 INFO L78 Accepts]: Start accepts. Automaton has 6260 states and 14676 transitions. Word has length 37 [2021-05-22 03:00:23,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:00:23,541 INFO L482 AbstractCegarLoop]: Abstraction has 6260 states and 14676 transitions. [2021-05-22 03:00:23,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:23,541 INFO L276 IsEmpty]: Start isEmpty. Operand 6260 states and 14676 transitions. [2021-05-22 03:00:23,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 03:00:23,546 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:00:23,546 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:00:23,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2096,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:00:23,748 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:00:23,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:00:23,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1488555781, now seen corresponding path program 131 times [2021-05-22 03:00:23,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:00:23,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829477172] [2021-05-22 03:00:23,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:00:23,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:00:24,023 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:24,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:00:24,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829477172] [2021-05-22 03:00:24,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829477172] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:24,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110781620] [2021-05-22 03:00:24,023 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 [2021-05-22 03:00:24,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-22 03:00:24,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:00:24,052 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 03:00:24,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:00:24,814 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:24,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110781620] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:24,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:00:24,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-05-22 03:00:24,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705521734] [2021-05-22 03:00:24,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-22 03:00:24,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:00:24,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-22 03:00:24,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 03:00:24,815 INFO L87 Difference]: Start difference. First operand 6260 states and 14676 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:27,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:00:27,198 INFO L93 Difference]: Finished difference Result 6797 states and 15791 transitions. [2021-05-22 03:00:27,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-22 03:00:27,199 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2021-05-22 03:00:27,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:00:27,205 INFO L225 Difference]: With dead ends: 6797 [2021-05-22 03:00:27,205 INFO L226 Difference]: Without dead ends: 6755 [2021-05-22 03:00:27,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2041 ImplicationChecksByTransitivity, 2470.7ms TimeCoverageRelationStatistics Valid=725, Invalid=6415, Unknown=0, NotChecked=0, Total=7140 [2021-05-22 03:00:27,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6755 states. [2021-05-22 03:00:27,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6755 to 6340. [2021-05-22 03:00:27,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6340 states, 6339 states have (on average 2.3420097807225115) internal successors, (14846), 6339 states have internal predecessors, (14846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:27,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6340 states to 6340 states and 14846 transitions. [2021-05-22 03:00:27,278 INFO L78 Accepts]: Start accepts. Automaton has 6340 states and 14846 transitions. Word has length 37 [2021-05-22 03:00:27,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:00:27,278 INFO L482 AbstractCegarLoop]: Abstraction has 6340 states and 14846 transitions. [2021-05-22 03:00:27,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:27,278 INFO L276 IsEmpty]: Start isEmpty. Operand 6340 states and 14846 transitions. [2021-05-22 03:00:27,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 03:00:27,284 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:00:27,284 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:00:27,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2116 [2021-05-22 03:00:27,485 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:00:27,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:00:27,485 INFO L82 PathProgramCache]: Analyzing trace with hash -784873853, now seen corresponding path program 132 times [2021-05-22 03:00:27,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:00:27,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688393695] [2021-05-22 03:00:27,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:00:27,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:00:27,757 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:27,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:00:27,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688393695] [2021-05-22 03:00:27,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688393695] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:27,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598595582] [2021-05-22 03:00:27,757 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 [2021-05-22 03:00:27,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 03:00:27,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:00:27,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-22 03:00:27,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:00:28,390 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:28,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598595582] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:28,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:00:28,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-05-22 03:00:28,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646861473] [2021-05-22 03:00:28,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 03:00:28,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:00:28,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 03:00:28,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 03:00:28,391 INFO L87 Difference]: Start difference. First operand 6340 states and 14846 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:43,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:00:43,010 INFO L93 Difference]: Finished difference Result 8496 states and 19273 transitions. [2021-05-22 03:00:43,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 250 states. [2021-05-22 03:00:43,010 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 03:00:43,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:00:43,018 INFO L225 Difference]: With dead ends: 8496 [2021-05-22 03:00:43,018 INFO L226 Difference]: Without dead ends: 8484 [2021-05-22 03:00:43,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28541 ImplicationChecksByTransitivity, 13362.6ms TimeCoverageRelationStatistics Valid=5449, Invalid=67181, Unknown=0, NotChecked=0, Total=72630 [2021-05-22 03:00:43,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8484 states. [2021-05-22 03:00:43,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8484 to 6370. [2021-05-22 03:00:43,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6370 states, 6369 states have (on average 2.342282932956508) internal successors, (14918), 6369 states have internal predecessors, (14918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:43,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6370 states to 6370 states and 14918 transitions. [2021-05-22 03:00:43,098 INFO L78 Accepts]: Start accepts. Automaton has 6370 states and 14918 transitions. Word has length 37 [2021-05-22 03:00:43,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:00:43,098 INFO L482 AbstractCegarLoop]: Abstraction has 6370 states and 14918 transitions. [2021-05-22 03:00:43,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:43,098 INFO L276 IsEmpty]: Start isEmpty. Operand 6370 states and 14918 transitions. [2021-05-22 03:00:43,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 03:00:43,104 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:00:43,104 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:00:43,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2132,133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:00:43,305 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:00:43,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:00:43,305 INFO L82 PathProgramCache]: Analyzing trace with hash -134804883, now seen corresponding path program 133 times [2021-05-22 03:00:43,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:00:43,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621807306] [2021-05-22 03:00:43,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:00:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:00:43,612 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:43,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:00:43,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621807306] [2021-05-22 03:00:43,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621807306] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:43,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312637335] [2021-05-22 03:00:43,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 03:00:43,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:00:43,636 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-22 03:00:43,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:00:44,351 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:44,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312637335] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:44,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:00:44,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-05-22 03:00:44,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186607453] [2021-05-22 03:00:44,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 03:00:44,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:00:44,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 03:00:44,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1134, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 03:00:44,352 INFO L87 Difference]: Start difference. First operand 6370 states and 14918 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 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) [2021-05-22 03:00:46,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:00:46,768 INFO L93 Difference]: Finished difference Result 6909 states and 15987 transitions. [2021-05-22 03:00:46,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-22 03:00:46,768 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 03:00:46,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:00:46,776 INFO L225 Difference]: With dead ends: 6909 [2021-05-22 03:00:46,776 INFO L226 Difference]: Without dead ends: 6891 [2021-05-22 03:00:46,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 2277.1ms TimeCoverageRelationStatistics Valid=553, Invalid=5299, Unknown=0, NotChecked=0, Total=5852 [2021-05-22 03:00:46,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6891 states. [2021-05-22 03:00:46,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6891 to 6452. [2021-05-22 03:00:46,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6452 states, 6451 states have (on average 2.3432026042474035) internal successors, (15116), 6451 states have internal predecessors, (15116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:46,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6452 states to 6452 states and 15116 transitions. [2021-05-22 03:00:46,861 INFO L78 Accepts]: Start accepts. Automaton has 6452 states and 15116 transitions. Word has length 37 [2021-05-22 03:00:46,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:00:46,861 INFO L482 AbstractCegarLoop]: Abstraction has 6452 states and 15116 transitions. [2021-05-22 03:00:46,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 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) [2021-05-22 03:00:46,861 INFO L276 IsEmpty]: Start isEmpty. Operand 6452 states and 15116 transitions. [2021-05-22 03:00:46,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 03:00:46,868 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:00:46,868 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:00:47,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2167 [2021-05-22 03:00:47,068 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:00:47,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:00:47,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1908066299, now seen corresponding path program 134 times [2021-05-22 03:00:47,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:00:47,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031364947] [2021-05-22 03:00:47,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:00:47,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:00:47,381 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:47,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:00:47,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031364947] [2021-05-22 03:00:47,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031364947] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:47,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371770320] [2021-05-22 03:00:47,381 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 [2021-05-22 03:00:47,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 03:00:47,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:00:47,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 03:00:47,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:00:48,110 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:48,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371770320] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:48,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:00:48,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2021-05-22 03:00:48,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694934751] [2021-05-22 03:00:48,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-22 03:00:48,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:00:48,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-22 03:00:48,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 03:00:48,111 INFO L87 Difference]: Start difference. First operand 6452 states and 15116 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:52,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:00:52,189 INFO L93 Difference]: Finished difference Result 8689 states and 20145 transitions. [2021-05-22 03:00:52,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-22 03:00:52,190 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2021-05-22 03:00:52,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:00:52,198 INFO L225 Difference]: With dead ends: 8689 [2021-05-22 03:00:52,199 INFO L226 Difference]: Without dead ends: 8655 [2021-05-22 03:00:52,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3911 ImplicationChecksByTransitivity, 3812.8ms TimeCoverageRelationStatistics Valid=1429, Invalid=10781, Unknown=0, NotChecked=0, Total=12210 [2021-05-22 03:00:52,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8655 states. [2021-05-22 03:00:52,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8655 to 6530. [2021-05-22 03:00:52,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6530 states, 6529 states have (on average 2.342165722162659) internal successors, (15292), 6529 states have internal predecessors, (15292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:52,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6530 states to 6530 states and 15292 transitions. [2021-05-22 03:00:52,292 INFO L78 Accepts]: Start accepts. Automaton has 6530 states and 15292 transitions. Word has length 37 [2021-05-22 03:00:52,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:00:52,292 INFO L482 AbstractCegarLoop]: Abstraction has 6530 states and 15292 transitions. [2021-05-22 03:00:52,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:52,292 INFO L276 IsEmpty]: Start isEmpty. Operand 6530 states and 15292 transitions. [2021-05-22 03:00:52,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 03:00:52,300 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:00:52,300 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:00:52,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2185,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:00:52,500 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:00:52,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:00:52,501 INFO L82 PathProgramCache]: Analyzing trace with hash -605365953, now seen corresponding path program 135 times [2021-05-22 03:00:52,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:00:52,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670552095] [2021-05-22 03:00:52,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:00:52,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:00:52,762 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:52,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:00:52,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670552095] [2021-05-22 03:00:52,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670552095] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:52,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817336358] [2021-05-22 03:00:52,763 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 [2021-05-22 03:00:52,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-22 03:00:52,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:00:52,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-22 03:00:52,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:00:53,160 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:53,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817336358] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:53,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:00:53,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 31 [2021-05-22 03:00:53,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666404732] [2021-05-22 03:00:53,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-22 03:00:53,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:00:53,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-22 03:00:53,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2021-05-22 03:00:53,161 INFO L87 Difference]: Start difference. First operand 6530 states and 15292 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:57,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:00:57,103 INFO L93 Difference]: Finished difference Result 8866 states and 20480 transitions. [2021-05-22 03:00:57,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-22 03:00:57,103 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 03:00:57,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:00:57,113 INFO L225 Difference]: With dead ends: 8866 [2021-05-22 03:00:57,114 INFO L226 Difference]: Without dead ends: 8800 [2021-05-22 03:00:57,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3379 ImplicationChecksByTransitivity, 3209.9ms TimeCoverageRelationStatistics Valid=1022, Invalid=10534, Unknown=0, NotChecked=0, Total=11556 [2021-05-22 03:00:57,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8800 states. [2021-05-22 03:00:57,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8800 to 6612. [2021-05-22 03:00:57,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6612 states, 6611 states have (on average 2.341249432763576) internal successors, (15478), 6611 states have internal predecessors, (15478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:57,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6612 states to 6612 states and 15478 transitions. [2021-05-22 03:00:57,211 INFO L78 Accepts]: Start accepts. Automaton has 6612 states and 15478 transitions. Word has length 37 [2021-05-22 03:00:57,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:00:57,211 INFO L482 AbstractCegarLoop]: Abstraction has 6612 states and 15478 transitions. [2021-05-22 03:00:57,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:00:57,211 INFO L276 IsEmpty]: Start isEmpty. Operand 6612 states and 15478 transitions. [2021-05-22 03:00:57,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 03:00:57,218 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:00:57,219 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:00:57,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2209 [2021-05-22 03:00:57,419 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:00:57,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:00:57,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1064850861, now seen corresponding path program 136 times [2021-05-22 03:00:57,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:00:57,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785418525] [2021-05-22 03:00:57,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:00:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:00:57,708 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:00:57,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:00:57,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785418525] [2021-05-22 03:00:57,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785418525] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:57,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387306667] [2021-05-22 03:00:57,709 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 [2021-05-22 03:00:57,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 03:00:57,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:00:57,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-22 03:00:57,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:00:58,110 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 03:00:58,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387306667] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:00:58,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:00:58,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 31 [2021-05-22 03:00:58,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611641989] [2021-05-22 03:00:58,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-22 03:00:58,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:00:58,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-22 03:00:58,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2021-05-22 03:00:58,111 INFO L87 Difference]: Start difference. First operand 6612 states and 15478 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:02,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:01:02,929 INFO L93 Difference]: Finished difference Result 10348 states and 23647 transitions. [2021-05-22 03:01:02,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-22 03:01:02,930 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 03:01:02,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:01:02,941 INFO L225 Difference]: With dead ends: 10348 [2021-05-22 03:01:02,941 INFO L226 Difference]: Without dead ends: 10305 [2021-05-22 03:01:02,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4756 ImplicationChecksByTransitivity, 4027.0ms TimeCoverageRelationStatistics Valid=1422, Invalid=13830, Unknown=0, NotChecked=0, Total=15252 [2021-05-22 03:01:02,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10305 states. [2021-05-22 03:01:03,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10305 to 6781. [2021-05-22 03:01:03,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6781 states, 6780 states have (on average 2.344395280235988) internal successors, (15895), 6780 states have internal predecessors, (15895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:03,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6781 states to 6781 states and 15895 transitions. [2021-05-22 03:01:03,061 INFO L78 Accepts]: Start accepts. Automaton has 6781 states and 15895 transitions. Word has length 37 [2021-05-22 03:01:03,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:01:03,061 INFO L482 AbstractCegarLoop]: Abstraction has 6781 states and 15895 transitions. [2021-05-22 03:01:03,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:03,061 INFO L276 IsEmpty]: Start isEmpty. Operand 6781 states and 15895 transitions. [2021-05-22 03:01:03,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 03:01:03,068 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:01:03,068 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:01:03,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2218,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:01:03,269 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:01:03,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:01:03,270 INFO L82 PathProgramCache]: Analyzing trace with hash 535237559, now seen corresponding path program 137 times [2021-05-22 03:01:03,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:01:03,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174503857] [2021-05-22 03:01:03,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:01:03,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:01:03,532 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:03,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:01:03,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174503857] [2021-05-22 03:01:03,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174503857] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:03,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607441132] [2021-05-22 03:01:03,533 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 [2021-05-22 03:01:03,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-22 03:01:03,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:01:03,560 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 03:01:03,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:01:04,227 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:04,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607441132] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:04,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:01:04,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2021-05-22 03:01:04,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786991416] [2021-05-22 03:01:04,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-22 03:01:04,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:01:04,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-22 03:01:04,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1254, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 03:01:04,228 INFO L87 Difference]: Start difference. First operand 6781 states and 15895 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:06,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:01:06,579 INFO L93 Difference]: Finished difference Result 7588 states and 17601 transitions. [2021-05-22 03:01:06,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-22 03:01:06,579 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 03:01:06,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:01:06,586 INFO L225 Difference]: With dead ends: 7588 [2021-05-22 03:01:06,587 INFO L226 Difference]: Without dead ends: 7588 [2021-05-22 03:01:06,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2433 ImplicationChecksByTransitivity, 2284.3ms TimeCoverageRelationStatistics Valid=839, Invalid=7171, Unknown=0, NotChecked=0, Total=8010 [2021-05-22 03:01:06,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7588 states. [2021-05-22 03:01:06,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7588 to 6907. [2021-05-22 03:01:06,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6907 states, 6906 states have (on average 2.347958297132928) internal successors, (16215), 6906 states have internal predecessors, (16215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:06,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6907 states to 6907 states and 16215 transitions. [2021-05-22 03:01:06,668 INFO L78 Accepts]: Start accepts. Automaton has 6907 states and 16215 transitions. Word has length 37 [2021-05-22 03:01:06,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:01:06,668 INFO L482 AbstractCegarLoop]: Abstraction has 6907 states and 16215 transitions. [2021-05-22 03:01:06,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:06,668 INFO L276 IsEmpty]: Start isEmpty. Operand 6907 states and 16215 transitions. [2021-05-22 03:01:06,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 03:01:06,675 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:01:06,675 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:01:06,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2228 [2021-05-22 03:01:06,875 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:01:06,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:01:06,875 INFO L82 PathProgramCache]: Analyzing trace with hash 596039863, now seen corresponding path program 138 times [2021-05-22 03:01:06,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:01:06,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495834778] [2021-05-22 03:01:06,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:01:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:01:07,137 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:07,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:01:07,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495834778] [2021-05-22 03:01:07,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495834778] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:07,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792219453] [2021-05-22 03:01:07,137 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 [2021-05-22 03:01:07,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-22 03:01:07,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:01:07,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 03:01:07,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:01:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:07,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792219453] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:07,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:01:07,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2021-05-22 03:01:07,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501539552] [2021-05-22 03:01:07,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-22 03:01:07,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:01:07,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-22 03:01:07,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 03:01:07,779 INFO L87 Difference]: Start difference. First operand 6907 states and 16215 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:12,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:01:12,620 INFO L93 Difference]: Finished difference Result 9465 states and 21940 transitions. [2021-05-22 03:01:12,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-22 03:01:12,620 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2021-05-22 03:01:12,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:01:12,630 INFO L225 Difference]: With dead ends: 9465 [2021-05-22 03:01:12,630 INFO L226 Difference]: Without dead ends: 9404 [2021-05-22 03:01:12,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4905 ImplicationChecksByTransitivity, 4489.7ms TimeCoverageRelationStatistics Valid=1741, Invalid=13021, Unknown=0, NotChecked=0, Total=14762 [2021-05-22 03:01:12,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9404 states. [2021-05-22 03:01:12,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9404 to 7012. [2021-05-22 03:01:12,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7012 states, 7011 states have (on average 2.3451718727713593) internal successors, (16442), 7011 states have internal predecessors, (16442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:12,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7012 states to 7012 states and 16442 transitions. [2021-05-22 03:01:12,723 INFO L78 Accepts]: Start accepts. Automaton has 7012 states and 16442 transitions. Word has length 37 [2021-05-22 03:01:12,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:01:12,723 INFO L482 AbstractCegarLoop]: Abstraction has 7012 states and 16442 transitions. [2021-05-22 03:01:12,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:12,724 INFO L276 IsEmpty]: Start isEmpty. Operand 7012 states and 16442 transitions. [2021-05-22 03:01:12,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 03:01:12,730 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:01:12,730 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:01:12,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2247 [2021-05-22 03:01:12,931 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:01:12,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:01:12,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1294610557, now seen corresponding path program 139 times [2021-05-22 03:01:12,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:01:12,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196171662] [2021-05-22 03:01:12,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:01:12,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:01:13,178 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:13,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:01:13,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196171662] [2021-05-22 03:01:13,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196171662] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:13,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319195138] [2021-05-22 03:01:13,178 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 [2021-05-22 03:01:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:01:13,201 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-22 03:01:13,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:01:13,875 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:13,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319195138] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:13,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:01:13,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-22 03:01:13,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307033438] [2021-05-22 03:01:13,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-22 03:01:13,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:01:13,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-22 03:01:13,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 03:01:13,877 INFO L87 Difference]: Start difference. First operand 7012 states and 16442 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:18,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:01:18,084 INFO L93 Difference]: Finished difference Result 12834 states and 29277 transitions. [2021-05-22 03:01:18,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-05-22 03:01:18,084 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 03:01:18,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:01:18,100 INFO L225 Difference]: With dead ends: 12834 [2021-05-22 03:01:18,100 INFO L226 Difference]: Without dead ends: 12677 [2021-05-22 03:01:18,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6069 ImplicationChecksByTransitivity, 3958.1ms TimeCoverageRelationStatistics Valid=2193, Invalid=14319, Unknown=0, NotChecked=0, Total=16512 [2021-05-22 03:01:18,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12677 states. [2021-05-22 03:01:18,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12677 to 7393. [2021-05-22 03:01:18,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7393 states, 7392 states have (on average 2.354707792207792) internal successors, (17406), 7392 states have internal predecessors, (17406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:18,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7393 states to 7393 states and 17406 transitions. [2021-05-22 03:01:18,234 INFO L78 Accepts]: Start accepts. Automaton has 7393 states and 17406 transitions. Word has length 37 [2021-05-22 03:01:18,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:01:18,234 INFO L482 AbstractCegarLoop]: Abstraction has 7393 states and 17406 transitions. [2021-05-22 03:01:18,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:18,234 INFO L276 IsEmpty]: Start isEmpty. Operand 7393 states and 17406 transitions. [2021-05-22 03:01:18,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 03:01:18,242 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:01:18,242 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:01:18,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2268 [2021-05-22 03:01:18,443 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:01:18,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:01:18,443 INFO L82 PathProgramCache]: Analyzing trace with hash 889571579, now seen corresponding path program 140 times [2021-05-22 03:01:18,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:01:18,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905970392] [2021-05-22 03:01:18,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:01:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:01:18,720 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 03:01:18,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:01:18,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905970392] [2021-05-22 03:01:18,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905970392] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:18,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937831582] [2021-05-22 03:01:18,721 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 [2021-05-22 03:01:18,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 03:01:18,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:01:18,751 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 03:01:18,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:01:19,603 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:19,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937831582] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:19,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:01:19,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-05-22 03:01:19,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457359712] [2021-05-22 03:01:19,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-22 03:01:19,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:01:19,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-22 03:01:19,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 03:01:19,604 INFO L87 Difference]: Start difference. First operand 7393 states and 17406 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:23,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:01:23,144 INFO L93 Difference]: Finished difference Result 10016 states and 23322 transitions. [2021-05-22 03:01:23,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-22 03:01:23,144 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 03:01:23,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:01:23,156 INFO L225 Difference]: With dead ends: 10016 [2021-05-22 03:01:23,156 INFO L226 Difference]: Without dead ends: 9961 [2021-05-22 03:01:23,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 3645.1ms TimeCoverageRelationStatistics Valid=960, Invalid=7050, Unknown=0, NotChecked=0, Total=8010 [2021-05-22 03:01:23,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9961 states. [2021-05-22 03:01:23,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9961 to 7444. [2021-05-22 03:01:23,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7444 states, 7443 states have (on average 2.3526803708182187) internal successors, (17511), 7443 states have internal predecessors, (17511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:23,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7444 states to 7444 states and 17511 transitions. [2021-05-22 03:01:23,254 INFO L78 Accepts]: Start accepts. Automaton has 7444 states and 17511 transitions. Word has length 37 [2021-05-22 03:01:23,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:01:23,254 INFO L482 AbstractCegarLoop]: Abstraction has 7444 states and 17511 transitions. [2021-05-22 03:01:23,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:23,254 INFO L276 IsEmpty]: Start isEmpty. Operand 7444 states and 17511 transitions. [2021-05-22 03:01:23,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 03:01:23,261 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:01:23,261 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:01:23,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2285,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:01:23,463 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:01:23,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:01:23,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1449579259, now seen corresponding path program 141 times [2021-05-22 03:01:23,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:01:23,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930842] [2021-05-22 03:01:23,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:01:23,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:01:23,776 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:23,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:01:23,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930842] [2021-05-22 03:01:23,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930842] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:23,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451500947] [2021-05-22 03:01:23,777 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 [2021-05-22 03:01:23,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-22 03:01:23,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:01:23,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-22 03:01:23,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:01:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:24,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451500947] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:24,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:01:24,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 32 [2021-05-22 03:01:24,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079977517] [2021-05-22 03:01:24,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-22 03:01:24,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:01:24,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-22 03:01:24,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-05-22 03:01:24,144 INFO L87 Difference]: Start difference. First operand 7444 states and 17511 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:27,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:01:27,071 INFO L93 Difference]: Finished difference Result 10247 states and 23785 transitions. [2021-05-22 03:01:27,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-22 03:01:27,071 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 03:01:27,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:01:27,082 INFO L225 Difference]: With dead ends: 10247 [2021-05-22 03:01:27,082 INFO L226 Difference]: Without dead ends: 10170 [2021-05-22 03:01:27,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 2648.3ms TimeCoverageRelationStatistics Valid=893, Invalid=6589, Unknown=0, NotChecked=0, Total=7482 [2021-05-22 03:01:27,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10170 states. [2021-05-22 03:01:27,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10170 to 7464. [2021-05-22 03:01:27,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7464 states, 7463 states have (on average 2.352405198981643) internal successors, (17556), 7463 states have internal predecessors, (17556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:27,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7464 states to 7464 states and 17556 transitions. [2021-05-22 03:01:27,195 INFO L78 Accepts]: Start accepts. Automaton has 7464 states and 17556 transitions. Word has length 37 [2021-05-22 03:01:27,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:01:27,195 INFO L482 AbstractCegarLoop]: Abstraction has 7464 states and 17556 transitions. [2021-05-22 03:01:27,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:27,195 INFO L276 IsEmpty]: Start isEmpty. Operand 7464 states and 17556 transitions. [2021-05-22 03:01:27,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 03:01:27,236 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:01:27,236 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:01:27,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2307 [2021-05-22 03:01:27,437 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:01:27,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:01:27,437 INFO L82 PathProgramCache]: Analyzing trace with hash 380397771, now seen corresponding path program 142 times [2021-05-22 03:01:27,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:01:27,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806352706] [2021-05-22 03:01:27,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:01:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:01:27,724 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:27,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:01:27,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806352706] [2021-05-22 03:01:27,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806352706] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:27,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487342198] [2021-05-22 03:01:27,724 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 [2021-05-22 03:01:27,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 03:01:27,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:01:27,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 03:01:27,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:01:28,283 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:28,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487342198] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:28,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:01:28,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 31 [2021-05-22 03:01:28,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822268910] [2021-05-22 03:01:28,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-22 03:01:28,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:01:28,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-22 03:01:28,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-05-22 03:01:28,285 INFO L87 Difference]: Start difference. First operand 7464 states and 17556 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 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) [2021-05-22 03:01:31,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:01:31,050 INFO L93 Difference]: Finished difference Result 11331 states and 26458 transitions. [2021-05-22 03:01:31,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-22 03:01:31,051 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 03:01:31,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:01:31,063 INFO L225 Difference]: With dead ends: 11331 [2021-05-22 03:01:31,064 INFO L226 Difference]: Without dead ends: 11256 [2021-05-22 03:01:31,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2151 ImplicationChecksByTransitivity, 2705.6ms TimeCoverageRelationStatistics Valid=1062, Invalid=6078, Unknown=0, NotChecked=0, Total=7140 [2021-05-22 03:01:31,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11256 states. [2021-05-22 03:01:31,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11256 to 8172. [2021-05-22 03:01:31,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8172 states, 8171 states have (on average 2.3583404724023986) internal successors, (19270), 8171 states have internal predecessors, (19270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:31,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8172 states to 8172 states and 19270 transitions. [2021-05-22 03:01:31,187 INFO L78 Accepts]: Start accepts. Automaton has 8172 states and 19270 transitions. Word has length 37 [2021-05-22 03:01:31,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:01:31,187 INFO L482 AbstractCegarLoop]: Abstraction has 8172 states and 19270 transitions. [2021-05-22 03:01:31,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 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) [2021-05-22 03:01:31,187 INFO L276 IsEmpty]: Start isEmpty. Operand 8172 states and 19270 transitions. [2021-05-22 03:01:31,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 03:01:31,195 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:01:31,195 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:01:31,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2316 [2021-05-22 03:01:31,395 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:01:31,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:01:31,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1713251961, now seen corresponding path program 143 times [2021-05-22 03:01:31,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:01:31,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964664815] [2021-05-22 03:01:31,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:01:31,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:01:31,654 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:31,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:01:31,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964664815] [2021-05-22 03:01:31,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964664815] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:31,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147922149] [2021-05-22 03:01:31,654 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 [2021-05-22 03:01:31,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-22 03:01:31,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:01:31,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 03:01:31,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:01:32,233 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 03:01:32,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147922149] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:32,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:01:32,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 32 [2021-05-22 03:01:32,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251727907] [2021-05-22 03:01:32,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-22 03:01:32,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:01:32,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-22 03:01:32,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 03:01:32,234 INFO L87 Difference]: Start difference. First operand 8172 states and 19270 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-05-22 03:01:36,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:01:36,814 INFO L93 Difference]: Finished difference Result 11271 states and 26216 transitions. [2021-05-22 03:01:36,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-22 03:01:36,814 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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 37 [2021-05-22 03:01:36,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:01:36,827 INFO L225 Difference]: With dead ends: 11271 [2021-05-22 03:01:36,827 INFO L226 Difference]: Without dead ends: 11205 [2021-05-22 03:01:36,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 4315.3ms TimeCoverageRelationStatistics Valid=1180, Invalid=8326, Unknown=0, NotChecked=0, Total=9506 [2021-05-22 03:01:36,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11205 states. [2021-05-22 03:01:36,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11205 to 8408. [2021-05-22 03:01:36,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8408 states, 8407 states have (on average 2.3495896276912096) internal successors, (19753), 8407 states have internal predecessors, (19753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:36,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8408 states to 8408 states and 19753 transitions. [2021-05-22 03:01:36,935 INFO L78 Accepts]: Start accepts. Automaton has 8408 states and 19753 transitions. Word has length 37 [2021-05-22 03:01:36,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:01:36,935 INFO L482 AbstractCegarLoop]: Abstraction has 8408 states and 19753 transitions. [2021-05-22 03:01:36,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2021-05-22 03:01:36,936 INFO L276 IsEmpty]: Start isEmpty. Operand 8408 states and 19753 transitions. [2021-05-22 03:01:36,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 03:01:36,943 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:01:36,943 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:01:37,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2336,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:01:37,145 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:01:37,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:01:37,145 INFO L82 PathProgramCache]: Analyzing trace with hash -787483265, now seen corresponding path program 144 times [2021-05-22 03:01:37,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:01:37,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705402889] [2021-05-22 03:01:37,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:01:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:01:37,458 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:37,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:01:37,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705402889] [2021-05-22 03:01:37,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705402889] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:37,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017732958] [2021-05-22 03:01:37,459 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 [2021-05-22 03:01:37,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-22 03:01:37,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:01:37,485 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 03:01:37,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:01:38,295 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:38,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017732958] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:38,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:01:38,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-22 03:01:38,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296489645] [2021-05-22 03:01:38,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 03:01:38,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:01:38,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 03:01:38,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1208, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 03:01:38,296 INFO L87 Difference]: Start difference. First operand 8408 states and 19753 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:40,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:01:40,934 INFO L93 Difference]: Finished difference Result 9319 states and 21711 transitions. [2021-05-22 03:01:40,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-22 03:01:40,934 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2021-05-22 03:01:40,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:01:40,942 INFO L225 Difference]: With dead ends: 9319 [2021-05-22 03:01:40,942 INFO L226 Difference]: Without dead ends: 9265 [2021-05-22 03:01:40,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1958 ImplicationChecksByTransitivity, 2515.6ms TimeCoverageRelationStatistics Valid=595, Invalid=6211, Unknown=0, NotChecked=0, Total=6806 [2021-05-22 03:01:40,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9265 states. [2021-05-22 03:01:41,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9265 to 8562. [2021-05-22 03:01:41,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8562 states, 8561 states have (on average 2.3510103959817776) internal successors, (20127), 8561 states have internal predecessors, (20127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:41,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8562 states to 8562 states and 20127 transitions. [2021-05-22 03:01:41,035 INFO L78 Accepts]: Start accepts. Automaton has 8562 states and 20127 transitions. Word has length 37 [2021-05-22 03:01:41,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:01:41,036 INFO L482 AbstractCegarLoop]: Abstraction has 8562 states and 20127 transitions. [2021-05-22 03:01:41,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:41,036 INFO L276 IsEmpty]: Start isEmpty. Operand 8562 states and 20127 transitions. [2021-05-22 03:01:41,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 03:01:41,043 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:01:41,043 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:01:41,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2356 [2021-05-22 03:01:41,244 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:01:41,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:01:41,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1338722055, now seen corresponding path program 145 times [2021-05-22 03:01:41,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:01:41,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396663711] [2021-05-22 03:01:41,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:01:41,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:01:41,581 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:41,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:01:41,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396663711] [2021-05-22 03:01:41,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396663711] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:41,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430708024] [2021-05-22 03:01:41,582 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 [2021-05-22 03:01:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:01:41,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 03:01:41,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:01:42,354 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:42,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430708024] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:42,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:01:42,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-05-22 03:01:42,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668696640] [2021-05-22 03:01:42,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 03:01:42,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:01:42,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 03:01:42,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 03:01:42,356 INFO L87 Difference]: Start difference. First operand 8562 states and 20127 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:48,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:01:48,541 INFO L93 Difference]: Finished difference Result 9415 states and 21837 transitions. [2021-05-22 03:01:48,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-05-22 03:01:48,542 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 03:01:48,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:01:48,551 INFO L225 Difference]: With dead ends: 9415 [2021-05-22 03:01:48,552 INFO L226 Difference]: Without dead ends: 9370 [2021-05-22 03:01:48,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5155 ImplicationChecksByTransitivity, 5510.7ms TimeCoverageRelationStatistics Valid=927, Invalid=15329, Unknown=0, NotChecked=0, Total=16256 [2021-05-22 03:01:48,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9370 states. [2021-05-22 03:01:48,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9370 to 8678. [2021-05-22 03:01:48,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8678 states, 8677 states have (on average 2.355076639391495) internal successors, (20435), 8677 states have internal predecessors, (20435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:48,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8678 states to 8678 states and 20435 transitions. [2021-05-22 03:01:48,655 INFO L78 Accepts]: Start accepts. Automaton has 8678 states and 20435 transitions. Word has length 37 [2021-05-22 03:01:48,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:01:48,655 INFO L482 AbstractCegarLoop]: Abstraction has 8678 states and 20435 transitions. [2021-05-22 03:01:48,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:48,656 INFO L276 IsEmpty]: Start isEmpty. Operand 8678 states and 20435 transitions. [2021-05-22 03:01:48,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 03:01:48,663 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:01:48,663 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:01:48,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2374,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:01:48,864 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:01:48,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:01:48,864 INFO L82 PathProgramCache]: Analyzing trace with hash -2123820725, now seen corresponding path program 146 times [2021-05-22 03:01:48,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:01:48,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081385123] [2021-05-22 03:01:48,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:01:48,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:01:49,201 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:49,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:01:49,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081385123] [2021-05-22 03:01:49,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081385123] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:49,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191561657] [2021-05-22 03:01:49,202 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 [2021-05-22 03:01:49,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 03:01:49,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:01:49,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-22 03:01:49,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:01:49,839 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:49,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191561657] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:49,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:01:49,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 35 [2021-05-22 03:01:49,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99954704] [2021-05-22 03:01:49,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 03:01:49,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:01:49,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 03:01:49,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1170, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 03:01:49,840 INFO L87 Difference]: Start difference. First operand 8678 states and 20435 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:56,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:01:56,103 INFO L93 Difference]: Finished difference Result 9447 states and 21893 transitions. [2021-05-22 03:01:56,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-22 03:01:56,103 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 03:01:56,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:01:56,113 INFO L225 Difference]: With dead ends: 9447 [2021-05-22 03:01:56,113 INFO L226 Difference]: Without dead ends: 9429 [2021-05-22 03:01:56,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 5322.0ms TimeCoverageRelationStatistics Valid=962, Invalid=14290, Unknown=0, NotChecked=0, Total=15252 [2021-05-22 03:01:56,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9429 states. [2021-05-22 03:01:56,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9429 to 8687. [2021-05-22 03:01:56,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8687 states, 8686 states have (on average 2.354823854478471) internal successors, (20454), 8686 states have internal predecessors, (20454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:56,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8687 states to 8687 states and 20454 transitions. [2021-05-22 03:01:56,219 INFO L78 Accepts]: Start accepts. Automaton has 8687 states and 20454 transitions. Word has length 37 [2021-05-22 03:01:56,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:01:56,219 INFO L482 AbstractCegarLoop]: Abstraction has 8687 states and 20454 transitions. [2021-05-22 03:01:56,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:01:56,219 INFO L276 IsEmpty]: Start isEmpty. Operand 8687 states and 20454 transitions. [2021-05-22 03:01:56,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 03:01:56,227 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:01:56,227 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:01:56,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2406 [2021-05-22 03:01:56,428 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:01:56,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:01:56,428 INFO L82 PathProgramCache]: Analyzing trace with hash 2042403983, now seen corresponding path program 147 times [2021-05-22 03:01:56,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:01:56,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828147091] [2021-05-22 03:01:56,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:01:56,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:01:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:56,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:01:56,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828147091] [2021-05-22 03:01:56,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828147091] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:56,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918307798] [2021-05-22 03:01:56,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 03:01:56,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-22 03:01:56,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:01:56,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-22 03:01:56,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:01:57,159 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:01:57,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918307798] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:01:57,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:01:57,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 32 [2021-05-22 03:01:57,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735684563] [2021-05-22 03:01:57,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-22 03:01:57,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:01:57,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-22 03:01:57,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2021-05-22 03:01:57,160 INFO L87 Difference]: Start difference. First operand 8687 states and 20454 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 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) [2021-05-22 03:02:02,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:02:02,114 INFO L93 Difference]: Finished difference Result 10286 states and 23827 transitions. [2021-05-22 03:02:02,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-05-22 03:02:02,114 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 03:02:02,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:02:02,124 INFO L225 Difference]: With dead ends: 10286 [2021-05-22 03:02:02,124 INFO L226 Difference]: Without dead ends: 10163 [2021-05-22 03:02:02,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4593 ImplicationChecksByTransitivity, 4165.9ms TimeCoverageRelationStatistics Valid=1527, Invalid=14223, Unknown=0, NotChecked=0, Total=15750 [2021-05-22 03:02:02,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10163 states. [2021-05-22 03:02:02,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10163 to 8213. [2021-05-22 03:02:02,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8213 states, 8212 states have (on average 2.32501217730151) internal successors, (19093), 8212 states have internal predecessors, (19093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:02,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8213 states to 8213 states and 19093 transitions. [2021-05-22 03:02:02,265 INFO L78 Accepts]: Start accepts. Automaton has 8213 states and 19093 transitions. Word has length 37 [2021-05-22 03:02:02,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:02:02,265 INFO L482 AbstractCegarLoop]: Abstraction has 8213 states and 19093 transitions. [2021-05-22 03:02:02,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 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) [2021-05-22 03:02:02,265 INFO L276 IsEmpty]: Start isEmpty. Operand 8213 states and 19093 transitions. [2021-05-22 03:02:02,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 03:02:02,271 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:02:02,271 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:02:02,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2437,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:02:02,472 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:02:02,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:02:02,472 INFO L82 PathProgramCache]: Analyzing trace with hash -726680961, now seen corresponding path program 148 times [2021-05-22 03:02:02,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:02:02,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839954532] [2021-05-22 03:02:02,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:02:02,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:02:02,745 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:02:02,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:02:02,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839954532] [2021-05-22 03:02:02,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839954532] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:02:02,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912303778] [2021-05-22 03:02:02,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 03:02:02,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 03:02:02,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:02:02,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 03:02:02,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:02:03,373 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:02:03,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912303778] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:02:03,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:02:03,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2021-05-22 03:02:03,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071041148] [2021-05-22 03:02:03,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-22 03:02:03,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:02:03,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-22 03:02:03,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 03:02:03,374 INFO L87 Difference]: Start difference. First operand 8213 states and 19093 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:06,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:02:06,165 INFO L93 Difference]: Finished difference Result 10792 states and 24889 transitions. [2021-05-22 03:02:06,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-22 03:02:06,165 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2021-05-22 03:02:06,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:02:06,175 INFO L225 Difference]: With dead ends: 10792 [2021-05-22 03:02:06,176 INFO L226 Difference]: Without dead ends: 10724 [2021-05-22 03:02:06,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2275 ImplicationChecksByTransitivity, 2648.6ms TimeCoverageRelationStatistics Valid=745, Invalid=7087, Unknown=0, NotChecked=0, Total=7832 [2021-05-22 03:02:06,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10724 states. [2021-05-22 03:02:06,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10724 to 8396. [2021-05-22 03:02:06,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8396 states, 8395 states have (on average 2.321262656343061) internal successors, (19487), 8395 states have internal predecessors, (19487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:06,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8396 states to 8396 states and 19487 transitions. [2021-05-22 03:02:06,276 INFO L78 Accepts]: Start accepts. Automaton has 8396 states and 19487 transitions. Word has length 37 [2021-05-22 03:02:06,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:02:06,276 INFO L482 AbstractCegarLoop]: Abstraction has 8396 states and 19487 transitions. [2021-05-22 03:02:06,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:06,277 INFO L276 IsEmpty]: Start isEmpty. Operand 8396 states and 19487 transitions. [2021-05-22 03:02:06,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 03:02:06,283 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:02:06,283 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:02:06,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2454 [2021-05-22 03:02:06,484 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:02:06,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:02:06,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1054854083, now seen corresponding path program 149 times [2021-05-22 03:02:06,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:02:06,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780179700] [2021-05-22 03:02:06,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:02:06,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:02:06,782 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:02:06,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:02:06,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780179700] [2021-05-22 03:02:06,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780179700] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:02:06,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169501586] [2021-05-22 03:02:06,782 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 [2021-05-22 03:02:06,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-22 03:02:06,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:02:06,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 03:02:06,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:02:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:02:07,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169501586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:02:07,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:02:07,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2021-05-22 03:02:07,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674786950] [2021-05-22 03:02:07,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-22 03:02:07,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:02:07,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-22 03:02:07,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 03:02:07,458 INFO L87 Difference]: Start difference. First operand 8396 states and 19487 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:11,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:02:11,175 INFO L93 Difference]: Finished difference Result 11349 states and 26070 transitions. [2021-05-22 03:02:11,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-22 03:02:11,176 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2021-05-22 03:02:11,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:02:11,187 INFO L225 Difference]: With dead ends: 11349 [2021-05-22 03:02:11,187 INFO L226 Difference]: Without dead ends: 11303 [2021-05-22 03:02:11,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2793 ImplicationChecksByTransitivity, 3306.1ms TimeCoverageRelationStatistics Valid=959, Invalid=8547, Unknown=0, NotChecked=0, Total=9506 [2021-05-22 03:02:11,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11303 states. [2021-05-22 03:02:11,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11303 to 8676. [2021-05-22 03:02:11,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8676 states, 8675 states have (on average 2.31700288184438) internal successors, (20100), 8675 states have internal predecessors, (20100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:11,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8676 states to 8676 states and 20100 transitions. [2021-05-22 03:02:11,302 INFO L78 Accepts]: Start accepts. Automaton has 8676 states and 20100 transitions. Word has length 37 [2021-05-22 03:02:11,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:02:11,302 INFO L482 AbstractCegarLoop]: Abstraction has 8676 states and 20100 transitions. [2021-05-22 03:02:11,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:11,302 INFO L276 IsEmpty]: Start isEmpty. Operand 8676 states and 20100 transitions. [2021-05-22 03:02:11,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 03:02:11,310 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:02:11,310 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:02:11,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2477 [2021-05-22 03:02:11,510 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:02:11,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:02:11,510 INFO L82 PathProgramCache]: Analyzing trace with hash 766205447, now seen corresponding path program 150 times [2021-05-22 03:02:11,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:02:11,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753225346] [2021-05-22 03:02:11,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:02:11,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:02:11,765 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:02:11,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:02:11,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753225346] [2021-05-22 03:02:11,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753225346] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:02:11,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800802358] [2021-05-22 03:02:11,765 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 [2021-05-22 03:02:11,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-22 03:02:11,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:02:11,792 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-22 03:02:11,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:02:12,629 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:02:12,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800802358] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:02:12,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:02:12,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-05-22 03:02:12,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007452207] [2021-05-22 03:02:12,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-22 03:02:12,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:02:12,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-22 03:02:12,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-05-22 03:02:12,630 INFO L87 Difference]: Start difference. First operand 8676 states and 20100 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:18,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:02:18,140 INFO L93 Difference]: Finished difference Result 12806 states and 29266 transitions. [2021-05-22 03:02:18,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-22 03:02:18,140 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 03:02:18,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:02:18,155 INFO L225 Difference]: With dead ends: 12806 [2021-05-22 03:02:18,155 INFO L226 Difference]: Without dead ends: 12763 [2021-05-22 03:02:18,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5274 ImplicationChecksByTransitivity, 5208.4ms TimeCoverageRelationStatistics Valid=1929, Invalid=13323, Unknown=0, NotChecked=0, Total=15252 [2021-05-22 03:02:18,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12763 states. [2021-05-22 03:02:18,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12763 to 8944. [2021-05-22 03:02:18,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8944 states, 8943 states have (on average 2.3187968243318795) internal successors, (20737), 8943 states have internal predecessors, (20737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:18,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8944 states to 8944 states and 20737 transitions. [2021-05-22 03:02:18,287 INFO L78 Accepts]: Start accepts. Automaton has 8944 states and 20737 transitions. Word has length 37 [2021-05-22 03:02:18,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:02:18,287 INFO L482 AbstractCegarLoop]: Abstraction has 8944 states and 20737 transitions. [2021-05-22 03:02:18,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:18,287 INFO L276 IsEmpty]: Start isEmpty. Operand 8944 states and 20737 transitions. [2021-05-22 03:02:18,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 03:02:18,295 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:02:18,295 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:02:18,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2499 [2021-05-22 03:02:18,496 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:02:18,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:02:18,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1506799643, now seen corresponding path program 151 times [2021-05-22 03:02:18,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:02:18,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673594946] [2021-05-22 03:02:18,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:02:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:02:18,784 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:02:18,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:02:18,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673594946] [2021-05-22 03:02:18,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673594946] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:02:18,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910896945] [2021-05-22 03:02:18,784 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 [2021-05-22 03:02:18,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:02:18,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 03:02:18,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:02:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:02:19,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910896945] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:02:19,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:02:19,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2021-05-22 03:02:19,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455556091] [2021-05-22 03:02:19,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-22 03:02:19,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:02:19,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-22 03:02:19,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 03:02:19,508 INFO L87 Difference]: Start difference. First operand 8944 states and 20737 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:24,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:02:24,617 INFO L93 Difference]: Finished difference Result 13828 states and 31463 transitions. [2021-05-22 03:02:24,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-22 03:02:24,618 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2021-05-22 03:02:24,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:02:24,633 INFO L225 Difference]: With dead ends: 13828 [2021-05-22 03:02:24,633 INFO L226 Difference]: Without dead ends: 13763 [2021-05-22 03:02:24,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5053 ImplicationChecksByTransitivity, 4506.8ms TimeCoverageRelationStatistics Valid=1672, Invalid=13828, Unknown=0, NotChecked=0, Total=15500 [2021-05-22 03:02:24,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13763 states. [2021-05-22 03:02:24,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13763 to 9228. [2021-05-22 03:02:24,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9228 states, 9227 states have (on average 2.318630107293812) internal successors, (21394), 9227 states have internal predecessors, (21394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:24,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9228 states to 9228 states and 21394 transitions. [2021-05-22 03:02:24,770 INFO L78 Accepts]: Start accepts. Automaton has 9228 states and 21394 transitions. Word has length 37 [2021-05-22 03:02:24,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:02:24,770 INFO L482 AbstractCegarLoop]: Abstraction has 9228 states and 21394 transitions. [2021-05-22 03:02:24,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:24,770 INFO L276 IsEmpty]: Start isEmpty. Operand 9228 states and 21394 transitions. [2021-05-22 03:02:24,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 03:02:24,778 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:02:24,778 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:02:24,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2517 [2021-05-22 03:02:24,979 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:02:24,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:02:24,979 INFO L82 PathProgramCache]: Analyzing trace with hash -2038707397, now seen corresponding path program 152 times [2021-05-22 03:02:24,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:02:24,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736395949] [2021-05-22 03:02:24,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:02:24,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:02:25,245 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:02:25,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:02:25,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736395949] [2021-05-22 03:02:25,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736395949] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:02:25,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601686323] [2021-05-22 03:02:25,246 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 [2021-05-22 03:02:25,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 03:02:25,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:02:25,307 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-22 03:02:25,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:02:26,001 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:02:26,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601686323] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:02:26,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:02:26,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-05-22 03:02:26,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8737867] [2021-05-22 03:02:26,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 03:02:26,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:02:26,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 03:02:26,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 03:02:26,002 INFO L87 Difference]: Start difference. First operand 9228 states and 21394 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:29,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:02:29,003 INFO L93 Difference]: Finished difference Result 12038 states and 27683 transitions. [2021-05-22 03:02:29,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-22 03:02:29,004 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 03:02:29,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:02:29,016 INFO L225 Difference]: With dead ends: 12038 [2021-05-22 03:02:29,016 INFO L226 Difference]: Without dead ends: 11974 [2021-05-22 03:02:29,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2973 ImplicationChecksByTransitivity, 2973.5ms TimeCoverageRelationStatistics Valid=891, Invalid=8421, Unknown=0, NotChecked=0, Total=9312 [2021-05-22 03:02:29,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11974 states. [2021-05-22 03:02:29,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11974 to 9402. [2021-05-22 03:02:29,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9402 states, 9401 states have (on average 2.3177321561536006) internal successors, (21789), 9401 states have internal predecessors, (21789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:29,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9402 states to 9402 states and 21789 transitions. [2021-05-22 03:02:29,138 INFO L78 Accepts]: Start accepts. Automaton has 9402 states and 21789 transitions. Word has length 37 [2021-05-22 03:02:29,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:02:29,138 INFO L482 AbstractCegarLoop]: Abstraction has 9402 states and 21789 transitions. [2021-05-22 03:02:29,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:29,138 INFO L276 IsEmpty]: Start isEmpty. Operand 9402 states and 21789 transitions. [2021-05-22 03:02:29,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 03:02:29,146 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:02:29,146 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:02:29,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2538,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:02:29,347 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:02:29,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:02:29,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1185168001, now seen corresponding path program 153 times [2021-05-22 03:02:29,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:02:29,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444868390] [2021-05-22 03:02:29,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:02:29,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:02:29,646 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:02:29,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:02:29,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444868390] [2021-05-22 03:02:29,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444868390] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:02:29,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575293784] [2021-05-22 03:02:29,647 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 [2021-05-22 03:02:29,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-22 03:02:29,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:02:29,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-22 03:02:29,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:02:30,013 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:02:30,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575293784] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:02:30,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:02:30,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 32 [2021-05-22 03:02:30,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977936445] [2021-05-22 03:02:30,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-22 03:02:30,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:02:30,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-22 03:02:30,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-05-22 03:02:30,014 INFO L87 Difference]: Start difference. First operand 9402 states and 21789 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:32,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:02:32,823 INFO L93 Difference]: Finished difference Result 13606 states and 31169 transitions. [2021-05-22 03:02:32,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-22 03:02:32,823 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 03:02:32,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:02:32,838 INFO L225 Difference]: With dead ends: 13606 [2021-05-22 03:02:32,839 INFO L226 Difference]: Without dead ends: 13480 [2021-05-22 03:02:32,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1885 ImplicationChecksByTransitivity, 2491.4ms TimeCoverageRelationStatistics Valid=981, Invalid=5991, Unknown=0, NotChecked=0, Total=6972 [2021-05-22 03:02:32,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13480 states. [2021-05-22 03:02:32,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13480 to 9857. [2021-05-22 03:02:32,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9857 states, 9856 states have (on average 2.3118912337662336) internal successors, (22786), 9856 states have internal predecessors, (22786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:32,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9857 states to 9857 states and 22786 transitions. [2021-05-22 03:02:32,970 INFO L78 Accepts]: Start accepts. Automaton has 9857 states and 22786 transitions. Word has length 37 [2021-05-22 03:02:32,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:02:32,970 INFO L482 AbstractCegarLoop]: Abstraction has 9857 states and 22786 transitions. [2021-05-22 03:02:32,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:32,970 INFO L276 IsEmpty]: Start isEmpty. Operand 9857 states and 22786 transitions. [2021-05-22 03:02:32,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 03:02:32,978 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:02:32,978 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:02:33,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2555,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:02:33,179 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:02:33,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:02:33,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1157338053, now seen corresponding path program 154 times [2021-05-22 03:02:33,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:02:33,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143889662] [2021-05-22 03:02:33,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:02:33,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:02:33,508 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:02:33,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:02:33,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143889662] [2021-05-22 03:02:33,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143889662] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:02:33,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718636186] [2021-05-22 03:02:33,509 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 [2021-05-22 03:02:33,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 03:02:33,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:02:33,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 03:02:33,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:02:34,206 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:02:34,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718636186] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:02:34,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:02:34,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2021-05-22 03:02:34,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713446459] [2021-05-22 03:02:34,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-22 03:02:34,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:02:34,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-22 03:02:34,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 03:02:34,207 INFO L87 Difference]: Start difference. First operand 9857 states and 22786 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:39,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:02:39,653 INFO L93 Difference]: Finished difference Result 14288 states and 32546 transitions. [2021-05-22 03:02:39,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-22 03:02:39,654 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 03:02:39,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:02:39,668 INFO L225 Difference]: With dead ends: 14288 [2021-05-22 03:02:39,668 INFO L226 Difference]: Without dead ends: 14228 [2021-05-22 03:02:39,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4640 ImplicationChecksByTransitivity, 4817.9ms TimeCoverageRelationStatistics Valid=1717, Invalid=13289, Unknown=0, NotChecked=0, Total=15006 [2021-05-22 03:02:39,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14228 states. [2021-05-22 03:02:39,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14228 to 10307. [2021-05-22 03:02:39,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10307 states, 10306 states have (on average 2.3123423248593054) internal successors, (23831), 10306 states have internal predecessors, (23831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:39,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10307 states to 10307 states and 23831 transitions. [2021-05-22 03:02:39,817 INFO L78 Accepts]: Start accepts. Automaton has 10307 states and 23831 transitions. Word has length 37 [2021-05-22 03:02:39,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:02:39,817 INFO L482 AbstractCegarLoop]: Abstraction has 10307 states and 23831 transitions. [2021-05-22 03:02:39,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:39,817 INFO L276 IsEmpty]: Start isEmpty. Operand 10307 states and 23831 transitions. [2021-05-22 03:02:39,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-22 03:02:39,826 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:02:39,826 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:02:40,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2563 [2021-05-22 03:02:40,027 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:02:40,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:02:40,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1911324613, now seen corresponding path program 155 times [2021-05-22 03:02:40,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:02:40,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592795592] [2021-05-22 03:02:40,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:02:40,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:02:40,275 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:02:40,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:02:40,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592795592] [2021-05-22 03:02:40,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592795592] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:02:40,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112562908] [2021-05-22 03:02:40,276 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 [2021-05-22 03:02:40,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-22 03:02:40,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:02:40,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-22 03:02:40,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:02:40,655 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:02:40,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112562908] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:02:40,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:02:40,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 31 [2021-05-22 03:02:40,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586351055] [2021-05-22 03:02:40,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-22 03:02:40,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:02:40,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-22 03:02:40,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-05-22 03:02:40,657 INFO L87 Difference]: Start difference. First operand 10307 states and 23831 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:43,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:02:43,434 INFO L93 Difference]: Finished difference Result 14681 states and 33701 transitions. [2021-05-22 03:02:43,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-22 03:02:43,435 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-22 03:02:43,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:02:43,452 INFO L225 Difference]: With dead ends: 14681 [2021-05-22 03:02:43,452 INFO L226 Difference]: Without dead ends: 14530 [2021-05-22 03:02:43,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2161 ImplicationChecksByTransitivity, 2461.3ms TimeCoverageRelationStatistics Valid=1147, Invalid=6685, Unknown=0, NotChecked=0, Total=7832 [2021-05-22 03:02:43,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14530 states. [2021-05-22 03:02:43,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14530 to 10928. [2021-05-22 03:02:43,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10928 states, 10927 states have (on average 2.315914706689851) internal successors, (25306), 10927 states have internal predecessors, (25306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:43,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10928 states to 10928 states and 25306 transitions. [2021-05-22 03:02:43,609 INFO L78 Accepts]: Start accepts. Automaton has 10928 states and 25306 transitions. Word has length 37 [2021-05-22 03:02:43,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:02:43,609 INFO L482 AbstractCegarLoop]: Abstraction has 10928 states and 25306 transitions. [2021-05-22 03:02:43,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:43,609 INFO L276 IsEmpty]: Start isEmpty. Operand 10928 states and 25306 transitions. [2021-05-22 03:02:43,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 03:02:43,619 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:02:43,620 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:02:43,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2584 [2021-05-22 03:02:43,820 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:02:43,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:02:43,820 INFO L82 PathProgramCache]: Analyzing trace with hash 855717531, now seen corresponding path program 156 times [2021-05-22 03:02:43,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:02:43,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847371613] [2021-05-22 03:02:43,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:02:43,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:02:44,037 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:02:44,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:02:44,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847371613] [2021-05-22 03:02:44,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847371613] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:02:44,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218525225] [2021-05-22 03:02:44,038 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 [2021-05-22 03:02:44,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-22 03:02:44,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:02:44,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-22 03:02:44,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:02:44,689 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:02:44,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218525225] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:02:44,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:02:44,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-05-22 03:02:44,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479180324] [2021-05-22 03:02:44,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 03:02:44,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:02:44,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 03:02:44,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 03:02:44,691 INFO L87 Difference]: Start difference. First operand 10928 states and 25306 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:46,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:02:46,640 INFO L93 Difference]: Finished difference Result 14325 states and 32936 transitions. [2021-05-22 03:02:46,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-22 03:02:46,640 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have 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 [2021-05-22 03:02:46,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:02:46,657 INFO L225 Difference]: With dead ends: 14325 [2021-05-22 03:02:46,657 INFO L226 Difference]: Without dead ends: 14232 [2021-05-22 03:02:46,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1923 ImplicationChecksByTransitivity, 1805.2ms TimeCoverageRelationStatistics Valid=872, Invalid=5448, Unknown=0, NotChecked=0, Total=6320 [2021-05-22 03:02:46,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14232 states. [2021-05-22 03:02:46,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14232 to 11014. [2021-05-22 03:02:46,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11014 states, 11013 states have (on average 2.315990193407791) internal successors, (25506), 11013 states have internal predecessors, (25506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:46,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11014 states to 11014 states and 25506 transitions. [2021-05-22 03:02:46,816 INFO L78 Accepts]: Start accepts. Automaton has 11014 states and 25506 transitions. Word has length 39 [2021-05-22 03:02:46,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:02:46,817 INFO L482 AbstractCegarLoop]: Abstraction has 11014 states and 25506 transitions. [2021-05-22 03:02:46,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:46,817 INFO L276 IsEmpty]: Start isEmpty. Operand 11014 states and 25506 transitions. [2021-05-22 03:02:46,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 03:02:46,826 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:02:46,827 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:02:47,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2593,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:02:47,027 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:02:47,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:02:47,028 INFO L82 PathProgramCache]: Analyzing trace with hash 367286253, now seen corresponding path program 157 times [2021-05-22 03:02:47,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:02:47,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124812454] [2021-05-22 03:02:47,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:02:47,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:02:47,316 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:02:47,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:02:47,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124812454] [2021-05-22 03:02:47,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124812454] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:02:47,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779633251] [2021-05-22 03:02:47,316 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 [2021-05-22 03:02:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:02:47,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-22 03:02:47,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:02:47,927 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:02:47,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779633251] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:02:47,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:02:47,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-05-22 03:02:47,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144517442] [2021-05-22 03:02:47,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 03:02:47,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:02:47,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 03:02:47,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 03:02:47,928 INFO L87 Difference]: Start difference. First operand 11014 states and 25506 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:49,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:02:49,771 INFO L93 Difference]: Finished difference Result 14246 states and 32789 transitions. [2021-05-22 03:02:49,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-22 03:02:49,771 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have 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 [2021-05-22 03:02:49,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:02:49,788 INFO L225 Difference]: With dead ends: 14246 [2021-05-22 03:02:49,788 INFO L226 Difference]: Without dead ends: 14165 [2021-05-22 03:02:49,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 1807.9ms TimeCoverageRelationStatistics Valid=732, Invalid=4818, Unknown=0, NotChecked=0, Total=5550 [2021-05-22 03:02:49,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14165 states. [2021-05-22 03:02:49,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14165 to 11038. [2021-05-22 03:02:49,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11038 states, 11037 states have (on average 2.315484280148591) internal successors, (25556), 11037 states have internal predecessors, (25556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:49,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11038 states to 11038 states and 25556 transitions. [2021-05-22 03:02:49,985 INFO L78 Accepts]: Start accepts. Automaton has 11038 states and 25556 transitions. Word has length 39 [2021-05-22 03:02:49,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:02:49,985 INFO L482 AbstractCegarLoop]: Abstraction has 11038 states and 25556 transitions. [2021-05-22 03:02:49,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:49,985 INFO L276 IsEmpty]: Start isEmpty. Operand 11038 states and 25556 transitions. [2021-05-22 03:02:49,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 03:02:49,995 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:02:49,995 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:02:50,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2615,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:02:50,195 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:02:50,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:02:50,196 INFO L82 PathProgramCache]: Analyzing trace with hash 2065380333, now seen corresponding path program 158 times [2021-05-22 03:02:50,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:02:50,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850772443] [2021-05-22 03:02:50,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:02:50,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:02:50,414 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:02:50,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:02:50,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850772443] [2021-05-22 03:02:50,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850772443] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:02:50,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870635740] [2021-05-22 03:02:50,415 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 [2021-05-22 03:02:50,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 03:02:50,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:02:50,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-22 03:02:50,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:02:51,028 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:02:51,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870635740] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:02:51,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:02:51,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-05-22 03:02:51,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293789894] [2021-05-22 03:02:51,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 03:02:51,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:02:51,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 03:02:51,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 03:02:51,029 INFO L87 Difference]: Start difference. First operand 11038 states and 25556 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:53,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:02:53,810 INFO L93 Difference]: Finished difference Result 14589 states and 33530 transitions. [2021-05-22 03:02:53,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-22 03:02:53,811 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have 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 [2021-05-22 03:02:53,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:02:53,825 INFO L225 Difference]: With dead ends: 14589 [2021-05-22 03:02:53,825 INFO L226 Difference]: Without dead ends: 14547 [2021-05-22 03:02:53,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2420 ImplicationChecksByTransitivity, 2508.9ms TimeCoverageRelationStatistics Valid=1213, Invalid=6797, Unknown=0, NotChecked=0, Total=8010 [2021-05-22 03:02:53,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14547 states. [2021-05-22 03:02:53,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14547 to 11114. [2021-05-22 03:02:53,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11114 states, 11113 states have (on average 2.315666336722757) internal successors, (25734), 11113 states have internal predecessors, (25734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:53,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11114 states to 11114 states and 25734 transitions. [2021-05-22 03:02:53,973 INFO L78 Accepts]: Start accepts. Automaton has 11114 states and 25734 transitions. Word has length 39 [2021-05-22 03:02:53,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:02:53,973 INFO L482 AbstractCegarLoop]: Abstraction has 11114 states and 25734 transitions. [2021-05-22 03:02:53,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:53,974 INFO L276 IsEmpty]: Start isEmpty. Operand 11114 states and 25734 transitions. [2021-05-22 03:02:53,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 03:02:53,985 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:02:53,985 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:02:54,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2637 [2021-05-22 03:02:54,185 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:02:54,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:02:54,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1136965671, now seen corresponding path program 159 times [2021-05-22 03:02:54,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:02:54,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339364784] [2021-05-22 03:02:54,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:02:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:02:54,434 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:02:54,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:02:54,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339364784] [2021-05-22 03:02:54,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339364784] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:02:54,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373326756] [2021-05-22 03:02:54,435 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 [2021-05-22 03:02:54,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-22 03:02:54,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:02:54,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-22 03:02:54,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:02:55,141 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:02:55,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373326756] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:02:55,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:02:55,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-05-22 03:02:55,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792975783] [2021-05-22 03:02:55,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 03:02:55,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:02:55,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 03:02:55,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 03:02:55,142 INFO L87 Difference]: Start difference. First operand 11114 states and 25734 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:57,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:02:57,511 INFO L93 Difference]: Finished difference Result 14390 states and 33112 transitions. [2021-05-22 03:02:57,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-22 03:02:57,511 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have 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 [2021-05-22 03:02:57,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:02:57,528 INFO L225 Difference]: With dead ends: 14390 [2021-05-22 03:02:57,528 INFO L226 Difference]: Without dead ends: 14297 [2021-05-22 03:02:57,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 2215.4ms TimeCoverageRelationStatistics Valid=852, Invalid=5468, Unknown=0, NotChecked=0, Total=6320 [2021-05-22 03:02:57,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14297 states. [2021-05-22 03:02:57,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14297 to 11118. [2021-05-22 03:02:57,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11118 states, 11117 states have (on average 2.3155527570387693) internal successors, (25742), 11117 states have internal predecessors, (25742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:57,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11118 states to 11118 states and 25742 transitions. [2021-05-22 03:02:57,689 INFO L78 Accepts]: Start accepts. Automaton has 11118 states and 25742 transitions. Word has length 39 [2021-05-22 03:02:57,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:02:57,689 INFO L482 AbstractCegarLoop]: Abstraction has 11118 states and 25742 transitions. [2021-05-22 03:02:57,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:02:57,689 INFO L276 IsEmpty]: Start isEmpty. Operand 11118 states and 25742 transitions. [2021-05-22 03:02:57,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 03:02:57,700 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:02:57,700 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:02:57,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2660,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:02:57,900 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:02:57,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:02:57,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1459907545, now seen corresponding path program 160 times [2021-05-22 03:02:57,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:02:57,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690866647] [2021-05-22 03:02:57,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:02:57,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:02:58,123 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:02:58,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:02:58,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690866647] [2021-05-22 03:02:58,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690866647] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:02:58,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966250160] [2021-05-22 03:02:58,124 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 [2021-05-22 03:02:58,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 03:02:58,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:02:58,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-22 03:02:58,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:02:58,803 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:02:58,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966250160] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:02:58,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:02:58,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-05-22 03:02:58,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641058805] [2021-05-22 03:02:58,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 03:02:58,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:02:58,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 03:02:58,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 03:02:58,804 INFO L87 Difference]: Start difference. First operand 11118 states and 25742 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:03:01,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:03:01,883 INFO L93 Difference]: Finished difference Result 14835 states and 34081 transitions. [2021-05-22 03:03:01,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-22 03:03:01,884 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have 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 [2021-05-22 03:03:01,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:03:01,901 INFO L225 Difference]: With dead ends: 14835 [2021-05-22 03:03:01,901 INFO L226 Difference]: Without dead ends: 14793 [2021-05-22 03:03:01,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2604 ImplicationChecksByTransitivity, 2879.0ms TimeCoverageRelationStatistics Valid=1393, Invalid=7349, Unknown=0, NotChecked=0, Total=8742 [2021-05-22 03:03:01,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14793 states. [2021-05-22 03:03:02,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14793 to 11122. [2021-05-22 03:03:02,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11122 states, 11121 states have (on average 2.315439259059437) internal successors, (25750), 11121 states have internal predecessors, (25750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:03:02,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11122 states to 11122 states and 25750 transitions. [2021-05-22 03:03:02,114 INFO L78 Accepts]: Start accepts. Automaton has 11122 states and 25750 transitions. Word has length 39 [2021-05-22 03:03:02,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:03:02,114 INFO L482 AbstractCegarLoop]: Abstraction has 11122 states and 25750 transitions. [2021-05-22 03:03:02,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:03:02,114 INFO L276 IsEmpty]: Start isEmpty. Operand 11122 states and 25750 transitions. [2021-05-22 03:03:02,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 03:03:02,122 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:03:02,122 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:03:02,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2684 [2021-05-22 03:03:02,323 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:03:02,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:03:02,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1198285931, now seen corresponding path program 161 times [2021-05-22 03:03:02,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:03:02,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077346314] [2021-05-22 03:03:02,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:03:02,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:03:02,544 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:03:02,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:03:02,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077346314] [2021-05-22 03:03:02,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077346314] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:03:02,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402440915] [2021-05-22 03:03:02,545 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 [2021-05-22 03:03:02,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-22 03:03:02,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:03:02,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-22 03:03:02,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:03:03,284 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:03:03,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402440915] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:03:03,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:03:03,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-05-22 03:03:03,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817693144] [2021-05-22 03:03:03,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 03:03:03,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:03:03,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 03:03:03,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1197, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 03:03:03,285 INFO L87 Difference]: Start difference. First operand 11122 states and 25750 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:03:07,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:03:07,301 INFO L93 Difference]: Finished difference Result 15432 states and 35365 transitions. [2021-05-22 03:03:07,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-22 03:03:07,301 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have 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 [2021-05-22 03:03:07,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:03:07,317 INFO L225 Difference]: With dead ends: 15432 [2021-05-22 03:03:07,318 INFO L226 Difference]: Without dead ends: 15390 [2021-05-22 03:03:07,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4288 ImplicationChecksByTransitivity, 3716.0ms TimeCoverageRelationStatistics Valid=1894, Invalid=10762, Unknown=0, NotChecked=0, Total=12656 [2021-05-22 03:03:07,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15390 states. [2021-05-22 03:03:07,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15390 to 11226. [2021-05-22 03:03:07,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11226 states, 11225 states have (on average 2.31554565701559) internal successors, (25992), 11225 states have internal predecessors, (25992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:03:07,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11226 states to 11226 states and 25992 transitions. [2021-05-22 03:03:07,473 INFO L78 Accepts]: Start accepts. Automaton has 11226 states and 25992 transitions. Word has length 39 [2021-05-22 03:03:07,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:03:07,474 INFO L482 AbstractCegarLoop]: Abstraction has 11226 states and 25992 transitions. [2021-05-22 03:03:07,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:03:07,474 INFO L276 IsEmpty]: Start isEmpty. Operand 11226 states and 25992 transitions. [2021-05-22 03:03:07,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 03:03:07,484 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:03:07,485 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:03:07,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2705,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 03:03:07,693 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:03:07,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:03:07,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1315146321, now seen corresponding path program 162 times [2021-05-22 03:03:07,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:03:07,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828457597] [2021-05-22 03:03:07,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:03:07,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:03:07,917 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:03:07,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:03:07,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828457597] [2021-05-22 03:03:07,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828457597] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:03:07,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707584623] [2021-05-22 03:03:07,917 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 [2021-05-22 03:03:07,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-22 03:03:07,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:03:07,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-22 03:03:07,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:03:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:03:08,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707584623] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:03:08,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:03:08,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-05-22 03:03:08,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283805653] [2021-05-22 03:03:08,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 03:03:08,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:03:08,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 03:03:08,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1194, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 03:03:08,669 INFO L87 Difference]: Start difference. First operand 11226 states and 25992 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:03:13,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:03:13,281 INFO L93 Difference]: Finished difference Result 15857 states and 36251 transitions. [2021-05-22 03:03:13,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-22 03:03:13,281 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have 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 [2021-05-22 03:03:13,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:03:13,300 INFO L225 Difference]: With dead ends: 15857 [2021-05-22 03:03:13,300 INFO L226 Difference]: Without dead ends: 15815 [2021-05-22 03:03:13,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5462 ImplicationChecksByTransitivity, 4135.1ms TimeCoverageRelationStatistics Valid=2226, Invalid=13274, Unknown=0, NotChecked=0, Total=15500 [2021-05-22 03:03:13,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15815 states. [2021-05-22 03:03:13,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15815 to 11354. [2021-05-22 03:03:13,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11354 states, 11353 states have (on average 2.3170968026072405) internal successors, (26306), 11353 states have internal predecessors, (26306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:03:13,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11354 states to 11354 states and 26306 transitions. [2021-05-22 03:03:13,484 INFO L78 Accepts]: Start accepts. Automaton has 11354 states and 26306 transitions. Word has length 39 [2021-05-22 03:03:13,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:03:13,484 INFO L482 AbstractCegarLoop]: Abstraction has 11354 states and 26306 transitions. [2021-05-22 03:03:13,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:03:13,484 INFO L276 IsEmpty]: Start isEmpty. Operand 11354 states and 26306 transitions. [2021-05-22 03:03:13,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 03:03:13,495 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:03:13,495 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:03:13,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2731 [2021-05-22 03:03:13,696 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:03:13,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:03:13,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1603794957, now seen corresponding path program 163 times [2021-05-22 03:03:13,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:03:13,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449887396] [2021-05-22 03:03:13,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:03:13,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:03:13,971 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:03:13,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:03:13,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449887396] [2021-05-22 03:03:13,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449887396] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:03:13,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549669391] [2021-05-22 03:03:13,972 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 [2021-05-22 03:03:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:03:14,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-22 03:03:14,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 03:03:14,685 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:03:14,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549669391] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:03:14,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 03:03:14,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-05-22 03:03:14,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335762214] [2021-05-22 03:03:14,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-22 03:03:14,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 03:03:14,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-22 03:03:14,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 03:03:14,687 INFO L87 Difference]: Start difference. First operand 11354 states and 26306 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:03:19,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 03:03:19,824 INFO L93 Difference]: Finished difference Result 16704 states and 38033 transitions. [2021-05-22 03:03:19,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-22 03:03:19,824 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have 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 [2021-05-22 03:03:19,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 03:03:19,840 INFO L225 Difference]: With dead ends: 16704 [2021-05-22 03:03:19,840 INFO L226 Difference]: Without dead ends: 16655 [2021-05-22 03:03:19,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6247 ImplicationChecksByTransitivity, 4640.2ms TimeCoverageRelationStatistics Valid=2587, Invalid=15235, Unknown=0, NotChecked=0, Total=17822 [2021-05-22 03:03:19,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16655 states. [2021-05-22 03:03:19,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16655 to 11527. [2021-05-22 03:03:19,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11527 states, 11526 states have (on average 2.318931112267916) internal successors, (26728), 11526 states have internal predecessors, (26728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:03:19,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11527 states to 11527 states and 26728 transitions. [2021-05-22 03:03:19,996 INFO L78 Accepts]: Start accepts. Automaton has 11527 states and 26728 transitions. Word has length 39 [2021-05-22 03:03:19,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 03:03:19,996 INFO L482 AbstractCegarLoop]: Abstraction has 11527 states and 26728 transitions. [2021-05-22 03:03:19,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 03:03:19,996 INFO L276 IsEmpty]: Start isEmpty. Operand 11527 states and 26728 transitions. [2021-05-22 03:03:20,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-22 03:03:20,006 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 03:03:20,006 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 03:03:20,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2755 [2021-05-22 03:03:20,207 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 03:03:20,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 03:03:20,207 INFO L82 PathProgramCache]: Analyzing trace with hash -692364489, now seen corresponding path program 164 times [2021-05-22 03:03:20,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 03:03:20,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447140885] [2021-05-22 03:03:20,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 03:03:20,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 03:03:20,419 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 03:03:20,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 03:03:20,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447140885] [2021-05-22 03:03:20,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447140885] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 03:03:20,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001914995] [2021-05-22 03:03:20,419 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 [2021-05-22 03:03:20,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 03:03:20,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 03:03:20,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-22 03:03:20,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-05-22 03:05:28,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2777 [2021-05-22 03:05:28,005 WARN L547 AbstractCegarLoop]: Verification canceled [2021-05-22 03:05:28,006 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was TIMEOUT (1/2) [2021-05-22 03:05:28,007 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-05-22 03:05:28,007 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 03:05:28,007 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 03:05:28,007 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 03:05:28,007 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 03:05:28,007 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 03:05:28,007 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 03:05:28,008 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 03:05:28,008 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-05-22 03:05:28,008 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-05-22 03:05:28,008 WARN L547 AbstractCegarLoop]: Verification canceled [2021-05-22 03:05:28,008 INFO L315 ceAbstractionStarter]: Result for error location InUseError was TIMEOUT (2/2) [2021-05-22 03:05:28,008 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-22 03:05:28,010 WARN L196 ceAbstractionStarter]: Timeout [2021-05-22 03:05:28,010 INFO L202 PluginConnector]: Adding new model nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.05 03:05:28 BasicIcfg [2021-05-22 03:05:28,010 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-22 03:05:28,010 INFO L168 Benchmark]: Toolchain (without parser) took 752644.55 ms. Allocated memory was 335.5 MB in the beginning and 3.5 GB in the end (delta: 3.1 GB). Free memory was 314.8 MB in the beginning and 1.9 GB in the end (delta: -1.6 GB). Peak memory consumption was 1.6 GB. Max. memory is 16.0 GB. [2021-05-22 03:05:28,010 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 335.5 MB. Free memory was 316.0 MB in the beginning and 315.9 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 03:05:28,010 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.51 ms. Allocated memory is still 335.5 MB. Free memory was 314.8 MB in the beginning and 313.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 03:05:28,010 INFO L168 Benchmark]: Boogie Preprocessor took 16.51 ms. Allocated memory is still 335.5 MB. Free memory was 313.3 MB in the beginning and 312.4 MB in the end (delta: 957.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-22 03:05:28,010 INFO L168 Benchmark]: RCFGBuilder took 210.01 ms. Allocated memory is still 335.5 MB. Free memory was 312.3 MB in the beginning and 300.9 MB in the end (delta: 11.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-05-22 03:05:28,010 INFO L168 Benchmark]: TraceAbstraction took 752387.76 ms. Allocated memory was 335.5 MB in the beginning and 3.5 GB in the end (delta: 3.1 GB). Free memory was 300.4 MB in the beginning and 1.9 GB in the end (delta: -1.6 GB). Peak memory consumption was 1.6 GB. Max. memory is 16.0 GB. [2021-05-22 03:05:28,011 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 335.5 MB. Free memory was 316.0 MB in the beginning and 315.9 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.51 ms. Allocated memory is still 335.5 MB. Free memory was 314.8 MB in the beginning and 313.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 16.51 ms. Allocated memory is still 335.5 MB. Free memory was 313.3 MB in the beginning and 312.4 MB in the end (delta: 957.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 210.01 ms. Allocated memory is still 335.5 MB. Free memory was 312.3 MB in the beginning and 300.9 MB in the end (delta: 11.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 752387.76 ms. Allocated memory was 335.5 MB in the beginning and 3.5 GB in the end (delta: 3.1 GB). Free memory was 300.4 MB in the beginning and 1.9 GB in the end (delta: -1.6 GB). Peak memory consumption was 1.6 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 40 with TraceHistMax 6,while TraceCheckSpWp was constructing forward predicates,while ExplicitLhsPolynomialRelations was build 0 of 1 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 752298.1ms, OverallIterations: 166, TraceHistogramMax: 6, EmptinessCheckTime: 653.1ms, AutomataDifference: 457448.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6393 SDtfs, 47991 SDslu, 100389 SDs, 0 SdLazy, 260623 SolverSat, 16321 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 96118.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17246 GetRequests, 3255 SyntacticMatches, 191 SemanticMatches, 13800 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454627 ImplicationChecksByTransitivity, 427919.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=11527occurred in iteration=165, InterpolantAutomatonStates: 10321, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 8420.9ms AutomataMinimizationTime, 165 MinimizatonAttempts, 212945 StatesRemovedByMinimization, 165 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 449.8ms SsaConstructionTime, 2242.8ms SatisfiabilityAnalysisTime, 118463.8ms InterpolantComputationTime, 11094 NumberOfCodeBlocks, 11094 NumberOfCodeBlocksAsserted, 771 NumberOfCheckSat, 10766 ConstructedInterpolants, 0 QuantifiedInterpolants, 179406 SizeOfPredicates, 718 NumberOfNonLiveVariables, 12442 ConjunctsInSsa, 5374 ConjunctsInUnsatCore, 328 InterpolantComputations, 2 PerfectInterpolantSequences, 505/15371 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 - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 1.1ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 0.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown