/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 03:47:02,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 03:47:02,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 03:47:02,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 03:47:02,580 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-04-15 03:47:02,619 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 03:47:02,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 03:47:02,620 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 03:47:02,620 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 03:47:02,623 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 03:47:02,623 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 03:47:02,623 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 03:47:02,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 03:47:02,624 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 03:47:02,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 03:47:02,624 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 03:47:02,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 03:47:02,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 03:47:02,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 03:47:02,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 03:47:02,625 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 03:47:02,625 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 03:47:02,625 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 03:47:02,625 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 03:47:02,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 03:47:02,626 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 03:47:02,626 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 03:47:02,626 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 03:47:02,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 03:47:02,626 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 03:47:02,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 03:47:02,626 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 03:47:02,627 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 03:47:02,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 03:47:02,627 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 03:47:02,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 03:47:02,627 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 03:47:02,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 03:47:02,973 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 03:47:02,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 03:47:02,976 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 03:47:02,979 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 03:47:02,980 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure3.wvr.bpl [2021-04-15 03:47:02,980 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure3.wvr.bpl' [2021-04-15 03:47:03,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 03:47:03,036 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 03:47:03,037 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 03:47:03,038 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 03:47:03,038 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 03:47:03,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:47:03" (1/1) ... [2021-04-15 03:47:03,054 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:47:03" (1/1) ... [2021-04-15 03:47:03,064 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 03:47:03,065 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 03:47:03,065 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 03:47:03,065 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 03:47:03,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:47:03" (1/1) ... [2021-04-15 03:47:03,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:47:03" (1/1) ... [2021-04-15 03:47:03,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:47:03" (1/1) ... [2021-04-15 03:47:03,071 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:47:03" (1/1) ... [2021-04-15 03:47:03,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:47:03" (1/1) ... [2021-04-15 03:47:03,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:47:03" (1/1) ... [2021-04-15 03:47:03,076 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:47:03" (1/1) ... [2021-04-15 03:47:03,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 03:47:03,077 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 03:47:03,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 03:47:03,077 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 03:47:03,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:47:03" (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 [2021-04-15 03:47:03,148 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 03:47:03,148 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 03:47:03,148 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 03:47:03,148 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 03:47:03,149 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 03:47:03,149 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 03:47:03,149 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 03:47:03,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 03:47:03,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 03:47:03,150 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-15 03:47:03,375 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 03:47:03,376 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-04-15 03:47:03,377 INFO L202 PluginConnector]: Adding new model figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 03:47:03 BoogieIcfgContainer [2021-04-15 03:47:03,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 03:47:03,379 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 03:47:03,379 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 03:47:03,381 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 03:47:03,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:47:03" (1/2) ... [2021-04-15 03:47:03,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67db3c38 and model type figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 03:47:03, skipping insertion in model container [2021-04-15 03:47:03,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 03:47:03" (2/2) ... [2021-04-15 03:47:03,383 INFO L111 eAbstractionObserver]: Analyzing ICFG figure3.wvr.bpl [2021-04-15 03:47:03,387 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 03:47:03,388 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 03:47:03,391 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 03:47:03,391 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 03:47:03,416 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-04-15 03:47:03,431 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-04-15 03:47:03,447 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 03:47:03,447 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 03:47:03,447 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 03:47:03,447 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 03:47:03,447 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 03:47:03,447 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 03:47:03,447 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 03:47:03,447 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 03:47:03,455 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-04-15 03:47:03,464 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) [2021-04-15 03:47:03,466 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) [2021-04-15 03:47:03,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 03:47:03,471 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:03,488 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:03,488 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:03,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:03,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1891492345, now seen corresponding path program 1 times [2021-04-15 03:47:03,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:03,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139085906] [2021-04-15 03:47:03,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:03,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:03,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:03,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139085906] [2021-04-15 03:47:03,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:47:03,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 03:47:03,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080497588] [2021-04-15 03:47:03,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 03:47:03,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:03,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 03:47:03,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 03:47:03,655 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 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:03,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:03,687 INFO L93 Difference]: Finished difference Result 58 states and 101 transitions. [2021-04-15 03:47:03,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 03:47:03,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 03:47:03,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:03,699 INFO L225 Difference]: With dead ends: 58 [2021-04-15 03:47:03,700 INFO L226 Difference]: Without dead ends: 43 [2021-04-15 03:47:03,701 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 03:47:03,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-04-15 03:47:03,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-04-15 03:47:03,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.8) internal successors, (72), 40 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:03,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 72 transitions. [2021-04-15 03:47:03,741 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 72 transitions. Word has length 15 [2021-04-15 03:47:03,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:03,741 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 72 transitions. [2021-04-15 03:47:03,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:03,741 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 72 transitions. [2021-04-15 03:47:03,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 03:47:03,743 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:03,743 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:03,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 03:47:03,744 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:03,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:03,749 INFO L82 PathProgramCache]: Analyzing trace with hash -672639493, now seen corresponding path program 1 times [2021-04-15 03:47:03,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:03,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830068080] [2021-04-15 03:47:03,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:03,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:03,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:03,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830068080] [2021-04-15 03:47:03,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707208509] [2021-04-15 03:47:03,865 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 [2021-04-15 03:47:03,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:03,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 03:47:03,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:47:04,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:04,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:04,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-04-15 03:47:04,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467918240] [2021-04-15 03:47:04,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:47:04,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:04,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:47:04,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:47:04,105 INFO L87 Difference]: Start difference. First operand 41 states and 72 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:04,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:04,256 INFO L93 Difference]: Finished difference Result 64 states and 109 transitions. [2021-04-15 03:47:04,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 03:47:04,256 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-04-15 03:47:04,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:04,258 INFO L225 Difference]: With dead ends: 64 [2021-04-15 03:47:04,258 INFO L226 Difference]: Without dead ends: 64 [2021-04-15 03:47:04,263 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 159.3ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:47:04,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-04-15 03:47:04,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2021-04-15 03:47:04,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.8) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:04,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2021-04-15 03:47:04,277 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 17 [2021-04-15 03:47:04,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:04,278 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2021-04-15 03:47:04,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:04,278 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2021-04-15 03:47:04,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 03:47:04,279 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:04,279 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:04,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-04-15 03:47:04,498 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:04,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:04,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1676307169, now seen corresponding path program 2 times [2021-04-15 03:47:04,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:04,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123243296] [2021-04-15 03:47:04,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:04,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:04,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:04,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123243296] [2021-04-15 03:47:04,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:47:04,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 03:47:04,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858153858] [2021-04-15 03:47:04,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:47:04,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:04,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:47:04,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:47:04,544 INFO L87 Difference]: Start difference. First operand 46 states and 81 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) [2021-04-15 03:47:04,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:04,612 INFO L93 Difference]: Finished difference Result 51 states and 89 transitions. [2021-04-15 03:47:04,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 03:47:04,612 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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 [2021-04-15 03:47:04,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:04,613 INFO L225 Difference]: With dead ends: 51 [2021-04-15 03:47:04,613 INFO L226 Difference]: Without dead ends: 49 [2021-04-15 03:47:04,614 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:47:04,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-04-15 03:47:04,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2021-04-15 03:47:04,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 43 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:04,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 77 transitions. [2021-04-15 03:47:04,621 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 77 transitions. Word has length 17 [2021-04-15 03:47:04,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:04,621 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 77 transitions. [2021-04-15 03:47:04,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) [2021-04-15 03:47:04,622 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 77 transitions. [2021-04-15 03:47:04,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 03:47:04,622 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:04,622 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:04,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-15 03:47:04,623 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:04,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:04,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1210697401, now seen corresponding path program 1 times [2021-04-15 03:47:04,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:04,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871774773] [2021-04-15 03:47:04,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:04,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:04,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871774773] [2021-04-15 03:47:04,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113571506] [2021-04-15 03:47:04,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:04,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:04,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 03:47:04,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:47:04,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:04,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:04,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-04-15 03:47:04,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449746749] [2021-04-15 03:47:04,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 03:47:04,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:04,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 03:47:04,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 03:47:04,834 INFO L87 Difference]: Start difference. First operand 44 states and 77 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:04,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:04,857 INFO L93 Difference]: Finished difference Result 97 states and 174 transitions. [2021-04-15 03:47:04,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 03:47:04,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 03:47:04,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:04,863 INFO L225 Difference]: With dead ends: 97 [2021-04-15 03:47:04,863 INFO L226 Difference]: Without dead ends: 76 [2021-04-15 03:47:04,863 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 03:47:04,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-04-15 03:47:04,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2021-04-15 03:47:04,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.896551724137931) internal successors, (110), 58 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:04,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 110 transitions. [2021-04-15 03:47:04,879 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 110 transitions. Word has length 19 [2021-04-15 03:47:04,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:04,880 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 110 transitions. [2021-04-15 03:47:04,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:04,880 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 110 transitions. [2021-04-15 03:47:04,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 03:47:04,880 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:04,881 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:05,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:05,082 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:05,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:05,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1830185403, now seen corresponding path program 2 times [2021-04-15 03:47:05,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:05,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124679583] [2021-04-15 03:47:05,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:05,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:05,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:05,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124679583] [2021-04-15 03:47:05,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811401] [2021-04-15 03:47:05,163 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:47:05,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:47:05,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:47:05,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 03:47:05,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:05,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:05,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:05,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-04-15 03:47:05,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701203113] [2021-04-15 03:47:05,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 03:47:05,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:05,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 03:47:05,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:47:05,361 INFO L87 Difference]: Start difference. First operand 59 states and 110 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:05,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:05,741 INFO L93 Difference]: Finished difference Result 174 states and 309 transitions. [2021-04-15 03:47:05,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:47:05,742 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 03:47:05,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:05,743 INFO L225 Difference]: With dead ends: 174 [2021-04-15 03:47:05,744 INFO L226 Difference]: Without dead ends: 168 [2021-04-15 03:47:05,744 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 314.4ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-04-15 03:47:05,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-04-15 03:47:05,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 68. [2021-04-15 03:47:05,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.9402985074626866) internal successors, (130), 67 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:05,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 130 transitions. [2021-04-15 03:47:05,751 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 130 transitions. Word has length 21 [2021-04-15 03:47:05,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:05,751 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 130 transitions. [2021-04-15 03:47:05,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:05,752 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 130 transitions. [2021-04-15 03:47:05,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 03:47:05,752 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:05,753 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:05,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:05,970 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:05,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:05,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1099819493, now seen corresponding path program 3 times [2021-04-15 03:47:05,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:05,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242489562] [2021-04-15 03:47:05,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:05,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:06,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:06,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242489562] [2021-04-15 03:47:06,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191332050] [2021-04-15 03:47:06,034 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 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 [2021-04-15 03:47:06,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 03:47:06,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:47:06,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 03:47:06,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:47:06,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:06,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:06,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-04-15 03:47:06,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732232218] [2021-04-15 03:47:06,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:47:06,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:06,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:47:06,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:47:06,184 INFO L87 Difference]: Start difference. First operand 68 states and 130 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:06,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:06,487 INFO L93 Difference]: Finished difference Result 146 states and 268 transitions. [2021-04-15 03:47:06,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:47:06,489 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 03:47:06,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:06,490 INFO L225 Difference]: With dead ends: 146 [2021-04-15 03:47:06,490 INFO L226 Difference]: Without dead ends: 142 [2021-04-15 03:47:06,495 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 287.1ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-04-15 03:47:06,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-04-15 03:47:06,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 67. [2021-04-15 03:47:06,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9242424242424243) internal successors, (127), 66 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:06,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 127 transitions. [2021-04-15 03:47:06,503 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 127 transitions. Word has length 21 [2021-04-15 03:47:06,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:06,504 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 127 transitions. [2021-04-15 03:47:06,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:06,504 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 127 transitions. [2021-04-15 03:47:06,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:47:06,505 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:06,505 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:06,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:06,728 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:06,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:06,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1243736697, now seen corresponding path program 4 times [2021-04-15 03:47:06,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:06,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949537713] [2021-04-15 03:47:06,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:06,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:06,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:06,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949537713] [2021-04-15 03:47:06,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425506014] [2021-04-15 03:47:06,797 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 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 [2021-04-15 03:47:06,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:47:06,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:47:06,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 03:47:06,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:47:06,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:06,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:06,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-04-15 03:47:06,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759418687] [2021-04-15 03:47:06,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 03:47:06,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:06,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 03:47:06,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:47:06,881 INFO L87 Difference]: Start difference. First operand 67 states and 127 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:06,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:06,905 INFO L93 Difference]: Finished difference Result 163 states and 310 transitions. [2021-04-15 03:47:06,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 03:47:06,905 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-04-15 03:47:06,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:06,906 INFO L225 Difference]: With dead ends: 163 [2021-04-15 03:47:06,906 INFO L226 Difference]: Without dead ends: 136 [2021-04-15 03:47:06,907 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:47:06,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-04-15 03:47:06,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 106. [2021-04-15 03:47:06,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.038095238095238) internal successors, (214), 105 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:06,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 214 transitions. [2021-04-15 03:47:06,924 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 214 transitions. Word has length 23 [2021-04-15 03:47:06,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:06,925 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 214 transitions. [2021-04-15 03:47:06,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:06,925 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 214 transitions. [2021-04-15 03:47:06,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:47:06,927 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:06,927 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:07,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-04-15 03:47:07,153 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:07,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:07,153 INFO L82 PathProgramCache]: Analyzing trace with hash 304168059, now seen corresponding path program 5 times [2021-04-15 03:47:07,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:07,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757543240] [2021-04-15 03:47:07,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:07,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:07,240 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:07,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757543240] [2021-04-15 03:47:07,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940528605] [2021-04-15 03:47:07,241 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 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 [2021-04-15 03:47:07,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 03:47:07,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:47:07,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 03:47:07,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:47:07,442 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:07,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:07,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-04-15 03:47:07,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21104917] [2021-04-15 03:47:07,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 03:47:07,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:07,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 03:47:07,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-04-15 03:47:07,444 INFO L87 Difference]: Start difference. First operand 106 states and 214 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:07,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:07,972 INFO L93 Difference]: Finished difference Result 365 states and 692 transitions. [2021-04-15 03:47:07,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 03:47:07,973 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 03:47:07,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:07,975 INFO L225 Difference]: With dead ends: 365 [2021-04-15 03:47:07,975 INFO L226 Difference]: Without dead ends: 335 [2021-04-15 03:47:07,976 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 485.1ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 03:47:07,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-04-15 03:47:07,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 93. [2021-04-15 03:47:07,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.9565217391304348) internal successors, (180), 92 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:07,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 180 transitions. [2021-04-15 03:47:07,982 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 180 transitions. Word has length 25 [2021-04-15 03:47:07,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:07,982 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 180 transitions. [2021-04-15 03:47:07,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:07,982 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 180 transitions. [2021-04-15 03:47:07,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:47:07,983 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:07,983 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:08,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:08,205 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:08,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:08,205 INFO L82 PathProgramCache]: Analyzing trace with hash -413112599, now seen corresponding path program 6 times [2021-04-15 03:47:08,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:08,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748158483] [2021-04-15 03:47:08,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:08,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:08,280 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:08,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748158483] [2021-04-15 03:47:08,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824969974] [2021-04-15 03:47:08,281 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 03:47:08,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 03:47:08,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:47:08,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 03:47:08,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:47:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:08,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:08,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-04-15 03:47:08,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926073420] [2021-04-15 03:47:08,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:47:08,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:08,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:47:08,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:47:08,481 INFO L87 Difference]: Start difference. First operand 93 states and 180 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:08,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:08,945 INFO L93 Difference]: Finished difference Result 240 states and 454 transitions. [2021-04-15 03:47:08,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 03:47:08,945 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-04-15 03:47:08,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:08,946 INFO L225 Difference]: With dead ends: 240 [2021-04-15 03:47:08,947 INFO L226 Difference]: Without dead ends: 236 [2021-04-15 03:47:08,948 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 441.2ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 03:47:08,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-04-15 03:47:08,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 85. [2021-04-15 03:47:08,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.9642857142857142) internal successors, (165), 84 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:08,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 165 transitions. [2021-04-15 03:47:08,953 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 165 transitions. Word has length 25 [2021-04-15 03:47:08,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:08,953 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 165 transitions. [2021-04-15 03:47:08,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:08,954 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 165 transitions. [2021-04-15 03:47:08,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-04-15 03:47:08,956 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:08,956 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:09,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:09,169 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:09,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:09,169 INFO L82 PathProgramCache]: Analyzing trace with hash -675082951, now seen corresponding path program 7 times [2021-04-15 03:47:09,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:09,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630081985] [2021-04-15 03:47:09,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:09,242 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:09,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630081985] [2021-04-15 03:47:09,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50841090] [2021-04-15 03:47:09,243 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 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 [2021-04-15 03:47:09,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:09,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:47:09,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:47:09,339 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:09,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:09,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-04-15 03:47:09,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846125395] [2021-04-15 03:47:09,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:47:09,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:09,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:47:09,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:47:09,341 INFO L87 Difference]: Start difference. First operand 85 states and 165 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:09,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:09,371 INFO L93 Difference]: Finished difference Result 222 states and 427 transitions. [2021-04-15 03:47:09,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 03:47:09,372 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-04-15 03:47:09,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:09,374 INFO L225 Difference]: With dead ends: 222 [2021-04-15 03:47:09,374 INFO L226 Difference]: Without dead ends: 189 [2021-04-15 03:47:09,374 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:47:09,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-04-15 03:47:09,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 146. [2021-04-15 03:47:09,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.075862068965517) internal successors, (301), 145 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:09,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 301 transitions. [2021-04-15 03:47:09,382 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 301 transitions. Word has length 27 [2021-04-15 03:47:09,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:09,382 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 301 transitions. [2021-04-15 03:47:09,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:09,383 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 301 transitions. [2021-04-15 03:47:09,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-04-15 03:47:09,383 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:09,383 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:09,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-04-15 03:47:09,593 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:09,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:09,593 INFO L82 PathProgramCache]: Analyzing trace with hash 199593531, now seen corresponding path program 8 times [2021-04-15 03:47:09,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:09,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573201744] [2021-04-15 03:47:09,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:09,708 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:09,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573201744] [2021-04-15 03:47:09,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993387824] [2021-04-15 03:47:09,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:09,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:47:09,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:47:09,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 03:47:09,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:47:09,958 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:09,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:09,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-04-15 03:47:09,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048291826] [2021-04-15 03:47:09,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 03:47:09,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:09,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 03:47:09,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-04-15 03:47:09,961 INFO L87 Difference]: Start difference. First operand 146 states and 301 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:10,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:10,780 INFO L93 Difference]: Finished difference Result 562 states and 1078 transitions. [2021-04-15 03:47:10,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 03:47:10,781 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-04-15 03:47:10,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:10,784 INFO L225 Difference]: With dead ends: 562 [2021-04-15 03:47:10,785 INFO L226 Difference]: Without dead ends: 496 [2021-04-15 03:47:10,786 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 727.6ms TimeCoverageRelationStatistics Valid=757, Invalid=2105, Unknown=0, NotChecked=0, Total=2862 [2021-04-15 03:47:10,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-04-15 03:47:10,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 115. [2021-04-15 03:47:10,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.9824561403508771) internal successors, (226), 114 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:10,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 226 transitions. [2021-04-15 03:47:10,793 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 226 transitions. Word has length 29 [2021-04-15 03:47:10,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:10,795 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 226 transitions. [2021-04-15 03:47:10,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:10,795 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 226 transitions. [2021-04-15 03:47:10,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-04-15 03:47:10,796 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:10,796 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:11,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:11,013 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:11,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:11,013 INFO L82 PathProgramCache]: Analyzing trace with hash -827661843, now seen corresponding path program 9 times [2021-04-15 03:47:11,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:11,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037746404] [2021-04-15 03:47:11,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:11,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:11,105 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:11,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037746404] [2021-04-15 03:47:11,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650038104] [2021-04-15 03:47:11,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:47:11,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 03:47:11,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:47:11,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 03:47:11,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:11,334 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:11,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:11,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-04-15 03:47:11,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274912093] [2021-04-15 03:47:11,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 03:47:11,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:11,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 03:47:11,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-04-15 03:47:11,336 INFO L87 Difference]: Start difference. First operand 115 states and 226 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:12,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:12,057 INFO L93 Difference]: Finished difference Result 352 states and 678 transitions. [2021-04-15 03:47:12,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 03:47:12,058 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-04-15 03:47:12,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:12,059 INFO L225 Difference]: With dead ends: 352 [2021-04-15 03:47:12,059 INFO L226 Difference]: Without dead ends: 348 [2021-04-15 03:47:12,061 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 652.5ms TimeCoverageRelationStatistics Valid=647, Invalid=1903, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 03:47:12,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-04-15 03:47:12,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 103. [2021-04-15 03:47:12,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 102 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:12,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 203 transitions. [2021-04-15 03:47:12,066 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 203 transitions. Word has length 29 [2021-04-15 03:47:12,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:12,066 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 203 transitions. [2021-04-15 03:47:12,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:12,067 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 203 transitions. [2021-04-15 03:47:12,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 03:47:12,067 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:12,067 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:12,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:12,285 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:12,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:12,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1908010745, now seen corresponding path program 10 times [2021-04-15 03:47:12,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:12,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427441785] [2021-04-15 03:47:12,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:12,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:12,344 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:12,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427441785] [2021-04-15 03:47:12,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738310515] [2021-04-15 03:47:12,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:12,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:47:12,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:47:12,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 03:47:12,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:47:12,440 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:12,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:12,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-04-15 03:47:12,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641029540] [2021-04-15 03:47:12,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:47:12,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:12,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:47:12,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:47:12,443 INFO L87 Difference]: Start difference. First operand 103 states and 203 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:12,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:12,489 INFO L93 Difference]: Finished difference Result 281 states and 544 transitions. [2021-04-15 03:47:12,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 03:47:12,489 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-04-15 03:47:12,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:12,492 INFO L225 Difference]: With dead ends: 281 [2021-04-15 03:47:12,492 INFO L226 Difference]: Without dead ends: 242 [2021-04-15 03:47:12,492 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:47:12,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-04-15 03:47:12,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 186. [2021-04-15 03:47:12,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.097297297297297) internal successors, (388), 185 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:12,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 388 transitions. [2021-04-15 03:47:12,500 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 388 transitions. Word has length 31 [2021-04-15 03:47:12,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:12,500 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 388 transitions. [2021-04-15 03:47:12,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:12,500 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 388 transitions. [2021-04-15 03:47:12,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 03:47:12,501 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:12,501 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:12,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-04-15 03:47:12,725 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:12,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:12,725 INFO L82 PathProgramCache]: Analyzing trace with hash -556785925, now seen corresponding path program 11 times [2021-04-15 03:47:12,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:12,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558096822] [2021-04-15 03:47:12,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:12,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:12,868 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:12,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558096822] [2021-04-15 03:47:12,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142680585] [2021-04-15 03:47:12,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:12,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 03:47:12,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:47:12,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:47:12,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:47:13,166 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:13,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:13,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-04-15 03:47:13,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082858509] [2021-04-15 03:47:13,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-04-15 03:47:13,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:13,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-04-15 03:47:13,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-04-15 03:47:13,168 INFO L87 Difference]: Start difference. First operand 186 states and 388 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 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) [2021-04-15 03:47:14,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:14,373 INFO L93 Difference]: Finished difference Result 787 states and 1520 transitions. [2021-04-15 03:47:14,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-04-15 03:47:14,373 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 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 [2021-04-15 03:47:14,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:14,376 INFO L225 Difference]: With dead ends: 787 [2021-04-15 03:47:14,376 INFO L226 Difference]: Without dead ends: 679 [2021-04-15 03:47:14,377 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 1033.2ms TimeCoverageRelationStatistics Valid=1299, Invalid=3671, Unknown=0, NotChecked=0, Total=4970 [2021-04-15 03:47:14,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-04-15 03:47:14,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 137. [2021-04-15 03:47:14,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.0) internal successors, (272), 136 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:14,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 272 transitions. [2021-04-15 03:47:14,385 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 272 transitions. Word has length 33 [2021-04-15 03:47:14,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:14,385 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 272 transitions. [2021-04-15 03:47:14,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 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) [2021-04-15 03:47:14,385 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 272 transitions. [2021-04-15 03:47:14,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 03:47:14,386 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:14,386 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:14,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-04-15 03:47:14,607 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:14,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:14,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1177967345, now seen corresponding path program 12 times [2021-04-15 03:47:14,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:14,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740681788] [2021-04-15 03:47:14,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:14,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740681788] [2021-04-15 03:47:14,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187550047] [2021-04-15 03:47:14,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:14,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-04-15 03:47:14,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:47:14,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:47:14,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:47:14,946 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:14,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:14,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-04-15 03:47:14,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975413821] [2021-04-15 03:47:14,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:47:14,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:14,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:47:14,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:47:14,947 INFO L87 Difference]: Start difference. First operand 137 states and 272 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:16,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:16,011 INFO L93 Difference]: Finished difference Result 486 states and 946 transitions. [2021-04-15 03:47:16,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-04-15 03:47:16,011 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 03:47:16,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:16,013 INFO L225 Difference]: With dead ends: 486 [2021-04-15 03:47:16,014 INFO L226 Difference]: Without dead ends: 482 [2021-04-15 03:47:16,017 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 962.8ms TimeCoverageRelationStatistics Valid=1088, Invalid=3334, Unknown=0, NotChecked=0, Total=4422 [2021-04-15 03:47:16,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-04-15 03:47:16,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 121. [2021-04-15 03:47:16,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.0083333333333333) internal successors, (241), 120 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:16,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 241 transitions. [2021-04-15 03:47:16,026 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 241 transitions. Word has length 33 [2021-04-15 03:47:16,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:16,026 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 241 transitions. [2021-04-15 03:47:16,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:16,027 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 241 transitions. [2021-04-15 03:47:16,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-04-15 03:47:16,027 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:16,027 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:16,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-04-15 03:47:16,241 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:16,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:16,241 INFO L82 PathProgramCache]: Analyzing trace with hash 876826553, now seen corresponding path program 13 times [2021-04-15 03:47:16,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:16,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457483894] [2021-04-15 03:47:16,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:16,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:16,308 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:16,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457483894] [2021-04-15 03:47:16,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622601247] [2021-04-15 03:47:16,309 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:16,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:16,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 03:47:16,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:47:16,396 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:16,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:16,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-04-15 03:47:16,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292781960] [2021-04-15 03:47:16,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 03:47:16,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:16,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 03:47:16,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:47:16,397 INFO L87 Difference]: Start difference. First operand 121 states and 241 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:16,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:16,458 INFO L93 Difference]: Finished difference Result 340 states and 661 transitions. [2021-04-15 03:47:16,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 03:47:16,458 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-04-15 03:47:16,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:16,460 INFO L225 Difference]: With dead ends: 340 [2021-04-15 03:47:16,460 INFO L226 Difference]: Without dead ends: 295 [2021-04-15 03:47:16,460 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:47:16,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-04-15 03:47:16,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 226. [2021-04-15 03:47:16,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.111111111111111) internal successors, (475), 225 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:16,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 475 transitions. [2021-04-15 03:47:16,469 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 475 transitions. Word has length 35 [2021-04-15 03:47:16,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:16,470 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 475 transitions. [2021-04-15 03:47:16,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:16,470 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 475 transitions. [2021-04-15 03:47:16,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 03:47:16,471 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:16,471 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:16,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:16,689 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:16,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:16,689 INFO L82 PathProgramCache]: Analyzing trace with hash -891441477, now seen corresponding path program 14 times [2021-04-15 03:47:16,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:16,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621353681] [2021-04-15 03:47:16,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:16,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:16,851 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:16,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621353681] [2021-04-15 03:47:16,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999999309] [2021-04-15 03:47:16,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:16,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:47:16,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:47:16,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:47:16,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:47:17,193 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:17,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:17,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-04-15 03:47:17,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794885123] [2021-04-15 03:47:17,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 03:47:17,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:17,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 03:47:17,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-04-15 03:47:17,194 INFO L87 Difference]: Start difference. First operand 226 states and 475 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 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) [2021-04-15 03:47:18,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:18,793 INFO L93 Difference]: Finished difference Result 1040 states and 2018 transitions. [2021-04-15 03:47:18,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-04-15 03:47:18,794 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 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 [2021-04-15 03:47:18,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:18,798 INFO L225 Difference]: With dead ends: 1040 [2021-04-15 03:47:18,798 INFO L226 Difference]: Without dead ends: 884 [2021-04-15 03:47:18,800 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2325 ImplicationChecksByTransitivity, 1434.2ms TimeCoverageRelationStatistics Valid=2085, Invalid=5925, Unknown=0, NotChecked=0, Total=8010 [2021-04-15 03:47:18,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-04-15 03:47:18,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 159. [2021-04-15 03:47:18,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.0126582278481013) internal successors, (318), 158 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:18,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 318 transitions. [2021-04-15 03:47:18,809 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 318 transitions. Word has length 37 [2021-04-15 03:47:18,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:18,809 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 318 transitions. [2021-04-15 03:47:18,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 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) [2021-04-15 03:47:18,809 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 318 transitions. [2021-04-15 03:47:18,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 03:47:18,810 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:18,810 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:19,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-04-15 03:47:19,025 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:19,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:19,025 INFO L82 PathProgramCache]: Analyzing trace with hash 843829749, now seen corresponding path program 15 times [2021-04-15 03:47:19,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:19,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940976573] [2021-04-15 03:47:19,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:19,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:19,113 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:19,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940976573] [2021-04-15 03:47:19,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554793908] [2021-04-15 03:47:19,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:19,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-04-15 03:47:19,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:47:19,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:47:19,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:47:19,419 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:19,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:19,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 23 [2021-04-15 03:47:19,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9032569] [2021-04-15 03:47:19,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 03:47:19,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:19,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 03:47:19,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-04-15 03:47:19,421 INFO L87 Difference]: Start difference. First operand 159 states and 318 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 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) [2021-04-15 03:47:20,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:20,780 INFO L93 Difference]: Finished difference Result 642 states and 1258 transitions. [2021-04-15 03:47:20,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-04-15 03:47:20,781 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 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 [2021-04-15 03:47:20,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:20,783 INFO L225 Difference]: With dead ends: 642 [2021-04-15 03:47:20,783 INFO L226 Difference]: Without dead ends: 638 [2021-04-15 03:47:20,784 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2298 ImplicationChecksByTransitivity, 1299.5ms TimeCoverageRelationStatistics Valid=1724, Invalid=5416, Unknown=0, NotChecked=0, Total=7140 [2021-04-15 03:47:20,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-04-15 03:47:20,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 139. [2021-04-15 03:47:20,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.0217391304347827) internal successors, (279), 138 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:20,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 279 transitions. [2021-04-15 03:47:20,791 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 279 transitions. Word has length 37 [2021-04-15 03:47:20,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:20,791 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 279 transitions. [2021-04-15 03:47:20,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 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) [2021-04-15 03:47:20,791 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 279 transitions. [2021-04-15 03:47:20,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 03:47:20,792 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:20,792 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:21,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-04-15 03:47:21,005 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:21,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:21,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1395388281, now seen corresponding path program 16 times [2021-04-15 03:47:21,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:21,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336411924] [2021-04-15 03:47:21,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:21,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:21,091 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:21,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336411924] [2021-04-15 03:47:21,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562088568] [2021-04-15 03:47:21,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:21,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:47:21,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:47:21,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 03:47:21,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:47:21,174 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:21,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:21,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-04-15 03:47:21,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313773291] [2021-04-15 03:47:21,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:47:21,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:21,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:47:21,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:47:21,176 INFO L87 Difference]: Start difference. First operand 139 states and 279 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:21,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:21,242 INFO L93 Difference]: Finished difference Result 399 states and 778 transitions. [2021-04-15 03:47:21,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:47:21,242 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 03:47:21,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:21,244 INFO L225 Difference]: With dead ends: 399 [2021-04-15 03:47:21,244 INFO L226 Difference]: Without dead ends: 348 [2021-04-15 03:47:21,244 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:47:21,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-04-15 03:47:21,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 266. [2021-04-15 03:47:21,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.120754716981132) internal successors, (562), 265 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:21,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 562 transitions. [2021-04-15 03:47:21,250 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 562 transitions. Word has length 39 [2021-04-15 03:47:21,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:21,250 INFO L480 AbstractCegarLoop]: Abstraction has 266 states and 562 transitions. [2021-04-15 03:47:21,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:21,251 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 562 transitions. [2021-04-15 03:47:21,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-04-15 03:47:21,251 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:21,251 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:21,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:21,472 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:21,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:21,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1201339771, now seen corresponding path program 17 times [2021-04-15 03:47:21,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:21,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703562942] [2021-04-15 03:47:21,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:21,647 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:21,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703562942] [2021-04-15 03:47:21,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047324745] [2021-04-15 03:47:21,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:21,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-04-15 03:47:21,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:47:21,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 03:47:21,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:47:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:22,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:22,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-04-15 03:47:22,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137809221] [2021-04-15 03:47:22,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-04-15 03:47:22,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:22,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-04-15 03:47:22,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 03:47:22,025 INFO L87 Difference]: Start difference. First operand 266 states and 562 transitions. Second operand has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:24,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:24,227 INFO L93 Difference]: Finished difference Result 1321 states and 2572 transitions. [2021-04-15 03:47:24,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-04-15 03:47:24,228 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-04-15 03:47:24,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:24,232 INFO L225 Difference]: With dead ends: 1321 [2021-04-15 03:47:24,232 INFO L226 Difference]: Without dead ends: 1111 [2021-04-15 03:47:24,235 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3789 ImplicationChecksByTransitivity, 1955.6ms TimeCoverageRelationStatistics Valid=3180, Invalid=9030, Unknown=0, NotChecked=0, Total=12210 [2021-04-15 03:47:24,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-04-15 03:47:24,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 181. [2021-04-15 03:47:24,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.022222222222222) internal successors, (364), 180 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:24,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 364 transitions. [2021-04-15 03:47:24,243 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 364 transitions. Word has length 41 [2021-04-15 03:47:24,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:24,243 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 364 transitions. [2021-04-15 03:47:24,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:24,243 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 364 transitions. [2021-04-15 03:47:24,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-04-15 03:47:24,244 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:24,244 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:24,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:24,461 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:24,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:24,461 INFO L82 PathProgramCache]: Analyzing trace with hash -860600583, now seen corresponding path program 18 times [2021-04-15 03:47:24,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:24,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789251763] [2021-04-15 03:47:24,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:24,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:24,573 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:24,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789251763] [2021-04-15 03:47:24,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977056202] [2021-04-15 03:47:24,573 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:47:24,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-04-15 03:47:24,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:24,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 03:47:24,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:47:24,973 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:24,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:24,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 26 [2021-04-15 03:47:24,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083914270] [2021-04-15 03:47:24,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 03:47:24,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:24,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 03:47:24,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2021-04-15 03:47:24,975 INFO L87 Difference]: Start difference. First operand 181 states and 364 transitions. Second operand has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:26,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:26,856 INFO L93 Difference]: Finished difference Result 820 states and 1614 transitions. [2021-04-15 03:47:26,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-04-15 03:47:26,856 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-04-15 03:47:26,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:26,858 INFO L225 Difference]: With dead ends: 820 [2021-04-15 03:47:26,858 INFO L226 Difference]: Without dead ends: 816 [2021-04-15 03:47:26,861 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3760 ImplicationChecksByTransitivity, 1789.0ms TimeCoverageRelationStatistics Valid=2606, Invalid=8314, Unknown=0, NotChecked=0, Total=10920 [2021-04-15 03:47:26,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-04-15 03:47:26,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 157. [2021-04-15 03:47:26,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.032051282051282) internal successors, (317), 156 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:26,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 317 transitions. [2021-04-15 03:47:26,867 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 317 transitions. Word has length 41 [2021-04-15 03:47:26,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:26,867 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 317 transitions. [2021-04-15 03:47:26,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:26,868 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 317 transitions. [2021-04-15 03:47:26,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-04-15 03:47:26,868 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:26,868 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:27,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:27,085 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:27,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:27,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1781494215, now seen corresponding path program 19 times [2021-04-15 03:47:27,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:27,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288736116] [2021-04-15 03:47:27,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:27,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:27,174 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:27,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288736116] [2021-04-15 03:47:27,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914434020] [2021-04-15 03:47:27,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:27,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 03:47:27,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:47:27,283 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:27,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:27,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-04-15 03:47:27,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070072353] [2021-04-15 03:47:27,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:47:27,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:27,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:47:27,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:47:27,285 INFO L87 Difference]: Start difference. First operand 157 states and 317 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:27,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:27,374 INFO L93 Difference]: Finished difference Result 458 states and 895 transitions. [2021-04-15 03:47:27,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 03:47:27,374 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-04-15 03:47:27,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:27,376 INFO L225 Difference]: With dead ends: 458 [2021-04-15 03:47:27,376 INFO L226 Difference]: Without dead ends: 401 [2021-04-15 03:47:27,377 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:47:27,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-04-15 03:47:27,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 306. [2021-04-15 03:47:27,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.1278688524590166) internal successors, (649), 305 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:27,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 649 transitions. [2021-04-15 03:47:27,383 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 649 transitions. Word has length 43 [2021-04-15 03:47:27,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:27,383 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 649 transitions. [2021-04-15 03:47:27,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:27,383 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 649 transitions. [2021-04-15 03:47:27,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-04-15 03:47:27,384 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:27,384 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:27,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-04-15 03:47:27,589 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:27,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:27,589 INFO L82 PathProgramCache]: Analyzing trace with hash -2145072325, now seen corresponding path program 20 times [2021-04-15 03:47:27,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:27,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346198300] [2021-04-15 03:47:27,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:27,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:27,785 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:27,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346198300] [2021-04-15 03:47:27,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919932940] [2021-04-15 03:47:27,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:27,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:47:27,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:47:27,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 03:47:27,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:47:28,223 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:28,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:28,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-04-15 03:47:28,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996917896] [2021-04-15 03:47:28,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-04-15 03:47:28,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:28,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-04-15 03:47:28,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1143, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 03:47:28,225 INFO L87 Difference]: Start difference. First operand 306 states and 649 transitions. Second operand has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:30,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:30,870 INFO L93 Difference]: Finished difference Result 1630 states and 3182 transitions. [2021-04-15 03:47:30,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-04-15 03:47:30,871 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-04-15 03:47:30,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:30,874 INFO L225 Difference]: With dead ends: 1630 [2021-04-15 03:47:30,874 INFO L226 Difference]: Without dead ends: 1360 [2021-04-15 03:47:30,875 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5864 ImplicationChecksByTransitivity, 2393.2ms TimeCoverageRelationStatistics Valid=4657, Invalid=13165, Unknown=0, NotChecked=0, Total=17822 [2021-04-15 03:47:30,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1360 states. [2021-04-15 03:47:30,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1360 to 203. [2021-04-15 03:47:30,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.0297029702970297) internal successors, (410), 202 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:30,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 410 transitions. [2021-04-15 03:47:30,884 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 410 transitions. Word has length 45 [2021-04-15 03:47:30,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:30,885 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 410 transitions. [2021-04-15 03:47:30,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:30,885 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 410 transitions. [2021-04-15 03:47:30,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-04-15 03:47:30,885 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:30,885 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:31,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-04-15 03:47:31,101 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:31,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:31,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1689827837, now seen corresponding path program 21 times [2021-04-15 03:47:31,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:31,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633226505] [2021-04-15 03:47:31,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:31,219 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:31,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633226505] [2021-04-15 03:47:31,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495729998] [2021-04-15 03:47:31,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:31,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-04-15 03:47:31,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:47:31,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 03:47:31,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:47:31,626 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:31,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:31,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2021-04-15 03:47:31,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649311245] [2021-04-15 03:47:31,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 03:47:31,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:31,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 03:47:31,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-04-15 03:47:31,629 INFO L87 Difference]: Start difference. First operand 203 states and 410 transitions. Second operand has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:33,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:33,977 INFO L93 Difference]: Finished difference Result 1020 states and 2014 transitions. [2021-04-15 03:47:33,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-04-15 03:47:33,977 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-04-15 03:47:33,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:33,980 INFO L225 Difference]: With dead ends: 1020 [2021-04-15 03:47:33,980 INFO L226 Difference]: Without dead ends: 1016 [2021-04-15 03:47:33,981 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5828 ImplicationChecksByTransitivity, 2231.5ms TimeCoverageRelationStatistics Valid=3791, Invalid=12211, Unknown=0, NotChecked=0, Total=16002 [2021-04-15 03:47:33,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2021-04-15 03:47:33,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 175. [2021-04-15 03:47:33,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.0402298850574714) internal successors, (355), 174 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:33,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 355 transitions. [2021-04-15 03:47:33,988 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 355 transitions. Word has length 45 [2021-04-15 03:47:33,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:33,988 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 355 transitions. [2021-04-15 03:47:33,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:33,989 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 355 transitions. [2021-04-15 03:47:33,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-04-15 03:47:33,989 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:33,989 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:34,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:34,205 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:34,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:34,205 INFO L82 PathProgramCache]: Analyzing trace with hash -753013767, now seen corresponding path program 22 times [2021-04-15 03:47:34,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:34,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163955700] [2021-04-15 03:47:34,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:34,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:34,325 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:34,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163955700] [2021-04-15 03:47:34,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281114658] [2021-04-15 03:47:34,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 03:47:34,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:47:34,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:47:34,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 03:47:34,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:47:34,446 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:34,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:34,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 03:47:34,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659825105] [2021-04-15 03:47:34,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:47:34,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:34,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:47:34,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:47:34,448 INFO L87 Difference]: Start difference. First operand 175 states and 355 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:34,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:34,562 INFO L93 Difference]: Finished difference Result 517 states and 1012 transitions. [2021-04-15 03:47:34,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 03:47:34,562 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-04-15 03:47:34,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:34,563 INFO L225 Difference]: With dead ends: 517 [2021-04-15 03:47:34,563 INFO L226 Difference]: Without dead ends: 454 [2021-04-15 03:47:34,563 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:47:34,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-04-15 03:47:34,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 346. [2021-04-15 03:47:34,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.1333333333333333) internal successors, (736), 345 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:34,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 736 transitions. [2021-04-15 03:47:34,570 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 736 transitions. Word has length 47 [2021-04-15 03:47:34,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:34,570 INFO L480 AbstractCegarLoop]: Abstraction has 346 states and 736 transitions. [2021-04-15 03:47:34,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:34,570 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 736 transitions. [2021-04-15 03:47:34,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-04-15 03:47:34,571 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:34,571 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:34,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-04-15 03:47:34,773 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:34,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:34,773 INFO L82 PathProgramCache]: Analyzing trace with hash -819472389, now seen corresponding path program 23 times [2021-04-15 03:47:34,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:34,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042619998] [2021-04-15 03:47:34,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:34,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:35,006 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:35,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042619998] [2021-04-15 03:47:35,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452230902] [2021-04-15 03:47:35,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:35,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-04-15 03:47:35,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:47:35,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 03:47:35,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:47:35,539 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:35,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:35,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2021-04-15 03:47:35,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302246780] [2021-04-15 03:47:35,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-04-15 03:47:35,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:35,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-04-15 03:47:35,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 03:47:35,541 INFO L87 Difference]: Start difference. First operand 346 states and 736 transitions. Second operand has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:38,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:38,886 INFO L93 Difference]: Finished difference Result 1967 states and 3848 transitions. [2021-04-15 03:47:38,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-04-15 03:47:38,886 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-04-15 03:47:38,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:38,890 INFO L225 Difference]: With dead ends: 1967 [2021-04-15 03:47:38,890 INFO L226 Difference]: Without dead ends: 1631 [2021-04-15 03:47:38,892 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8705 ImplicationChecksByTransitivity, 3115.4ms TimeCoverageRelationStatistics Valid=6597, Invalid=18525, Unknown=0, NotChecked=0, Total=25122 [2021-04-15 03:47:38,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-04-15 03:47:38,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 225. [2021-04-15 03:47:38,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.0357142857142856) internal successors, (456), 224 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:38,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 456 transitions. [2021-04-15 03:47:38,900 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 456 transitions. Word has length 49 [2021-04-15 03:47:38,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:38,901 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 456 transitions. [2021-04-15 03:47:38,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:38,901 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 456 transitions. [2021-04-15 03:47:38,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-04-15 03:47:38,902 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:38,902 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:39,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:39,112 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:39,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:39,112 INFO L82 PathProgramCache]: Analyzing trace with hash 522332929, now seen corresponding path program 24 times [2021-04-15 03:47:39,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:39,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206044623] [2021-04-15 03:47:39,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:39,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:39,251 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:39,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206044623] [2021-04-15 03:47:39,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033422330] [2021-04-15 03:47:39,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:39,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-04-15 03:47:39,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:47:39,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 03:47:39,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:47:39,710 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:39,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:39,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2021-04-15 03:47:39,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648433566] [2021-04-15 03:47:39,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 03:47:39,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:39,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 03:47:39,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 03:47:39,712 INFO L87 Difference]: Start difference. First operand 225 states and 456 transitions. Second operand has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 32 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:42,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:42,705 INFO L93 Difference]: Finished difference Result 1242 states and 2458 transitions. [2021-04-15 03:47:42,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-04-15 03:47:42,705 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 32 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-04-15 03:47:42,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:42,708 INFO L225 Difference]: With dead ends: 1242 [2021-04-15 03:47:42,708 INFO L226 Difference]: Without dead ends: 1238 [2021-04-15 03:47:42,710 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8651 ImplicationChecksByTransitivity, 2868.7ms TimeCoverageRelationStatistics Valid=5342, Invalid=17308, Unknown=0, NotChecked=0, Total=22650 [2021-04-15 03:47:42,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-04-15 03:47:42,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 193. [2021-04-15 03:47:42,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.046875) internal successors, (393), 192 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:42,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 393 transitions. [2021-04-15 03:47:42,716 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 393 transitions. Word has length 49 [2021-04-15 03:47:42,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:42,717 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 393 transitions. [2021-04-15 03:47:42,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 32 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:42,717 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 393 transitions. [2021-04-15 03:47:42,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-04-15 03:47:42,717 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:42,717 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:42,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-04-15 03:47:42,933 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:42,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:42,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1838205113, now seen corresponding path program 25 times [2021-04-15 03:47:42,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:42,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924013494] [2021-04-15 03:47:42,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:42,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:43,056 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:43,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924013494] [2021-04-15 03:47:43,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508610364] [2021-04-15 03:47:43,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:43,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 39 conjunts are in the unsatisfiable core [2021-04-15 03:47:43,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:47:43,195 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:43,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:43,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-04-15 03:47:43,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099794185] [2021-04-15 03:47:43,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:47:43,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:43,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:47:43,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:47:43,197 INFO L87 Difference]: Start difference. First operand 193 states and 393 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:43,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:43,340 INFO L93 Difference]: Finished difference Result 576 states and 1129 transitions. [2021-04-15 03:47:43,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:47:43,341 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-04-15 03:47:43,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:43,342 INFO L225 Difference]: With dead ends: 576 [2021-04-15 03:47:43,342 INFO L226 Difference]: Without dead ends: 507 [2021-04-15 03:47:43,342 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:47:43,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-04-15 03:47:43,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 386. [2021-04-15 03:47:43,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.137662337662338) internal successors, (823), 385 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:43,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 823 transitions. [2021-04-15 03:47:43,349 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 823 transitions. Word has length 51 [2021-04-15 03:47:43,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:43,349 INFO L480 AbstractCegarLoop]: Abstraction has 386 states and 823 transitions. [2021-04-15 03:47:43,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:43,350 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 823 transitions. [2021-04-15 03:47:43,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-04-15 03:47:43,350 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:43,350 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:43,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-04-15 03:47:43,572 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:43,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:43,572 INFO L82 PathProgramCache]: Analyzing trace with hash 987816891, now seen corresponding path program 26 times [2021-04-15 03:47:43,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:43,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275737875] [2021-04-15 03:47:43,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:43,861 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:43,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275737875] [2021-04-15 03:47:43,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768508829] [2021-04-15 03:47:43,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:43,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:47:43,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:47:43,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 03:47:43,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:47:44,439 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:44,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:44,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-04-15 03:47:44,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477571283] [2021-04-15 03:47:44,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-04-15 03:47:44,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:44,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-04-15 03:47:44,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1694, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 03:47:44,440 INFO L87 Difference]: Start difference. First operand 386 states and 823 transitions. Second operand has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:48,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:48,832 INFO L93 Difference]: Finished difference Result 2332 states and 4570 transitions. [2021-04-15 03:47:48,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-04-15 03:47:48,832 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-04-15 03:47:48,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:48,837 INFO L225 Difference]: With dead ends: 2332 [2021-04-15 03:47:48,837 INFO L226 Difference]: Without dead ends: 1924 [2021-04-15 03:47:48,839 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12484 ImplicationChecksByTransitivity, 3968.9ms TimeCoverageRelationStatistics Valid=9089, Invalid=25321, Unknown=0, NotChecked=0, Total=34410 [2021-04-15 03:47:48,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2021-04-15 03:47:48,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 247. [2021-04-15 03:47:48,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.040650406504065) internal successors, (502), 246 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:48,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 502 transitions. [2021-04-15 03:47:48,850 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 502 transitions. Word has length 53 [2021-04-15 03:47:48,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:48,851 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 502 transitions. [2021-04-15 03:47:48,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:48,851 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 502 transitions. [2021-04-15 03:47:48,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-04-15 03:47:48,851 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:48,852 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:49,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-04-15 03:47:49,073 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:49,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:49,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1237739003, now seen corresponding path program 27 times [2021-04-15 03:47:49,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:49,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354707543] [2021-04-15 03:47:49,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:49,216 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:49,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354707543] [2021-04-15 03:47:49,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522583508] [2021-04-15 03:47:49,217 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 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 [2021-04-15 03:47:49,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-04-15 03:47:49,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:47:49,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 03:47:49,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:47:49,797 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:49,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:49,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2021-04-15 03:47:49,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80080208] [2021-04-15 03:47:49,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-04-15 03:47:49,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:49,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-04-15 03:47:49,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=994, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 03:47:49,798 INFO L87 Difference]: Start difference. First operand 247 states and 502 transitions. Second operand has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:53,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:53,711 INFO L93 Difference]: Finished difference Result 1486 states and 2946 transitions. [2021-04-15 03:47:53,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-04-15 03:47:53,711 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-04-15 03:47:53,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:53,714 INFO L225 Difference]: With dead ends: 1486 [2021-04-15 03:47:53,714 INFO L226 Difference]: Without dead ends: 1482 [2021-04-15 03:47:53,716 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12394 ImplicationChecksByTransitivity, 3706.8ms TimeCoverageRelationStatistics Valid=7328, Invalid=23824, Unknown=0, NotChecked=0, Total=31152 [2021-04-15 03:47:53,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2021-04-15 03:47:53,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 211. [2021-04-15 03:47:53,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.052380952380952) internal successors, (431), 210 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:53,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 431 transitions. [2021-04-15 03:47:53,724 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 431 transitions. Word has length 53 [2021-04-15 03:47:53,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:53,724 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 431 transitions. [2021-04-15 03:47:53,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:53,724 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 431 transitions. [2021-04-15 03:47:53,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-04-15 03:47:53,725 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:53,725 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:53,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:53,941 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:53,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:53,941 INFO L82 PathProgramCache]: Analyzing trace with hash -818551687, now seen corresponding path program 28 times [2021-04-15 03:47:53,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:53,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498626515] [2021-04-15 03:47:53,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:53,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:54,127 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:54,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498626515] [2021-04-15 03:47:54,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903354339] [2021-04-15 03:47:54,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:54,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:47:54,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:47:54,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 03:47:54,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:47:54,251 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:54,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:54,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-04-15 03:47:54,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354193629] [2021-04-15 03:47:54,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:47:54,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:54,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:47:54,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:47:54,252 INFO L87 Difference]: Start difference. First operand 211 states and 431 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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) [2021-04-15 03:47:54,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:54,418 INFO L93 Difference]: Finished difference Result 635 states and 1246 transitions. [2021-04-15 03:47:54,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:47:54,419 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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 55 [2021-04-15 03:47:54,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:54,421 INFO L225 Difference]: With dead ends: 635 [2021-04-15 03:47:54,421 INFO L226 Difference]: Without dead ends: 560 [2021-04-15 03:47:54,421 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 119.6ms TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:47:54,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-04-15 03:47:54,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 426. [2021-04-15 03:47:54,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.1411764705882352) internal successors, (910), 425 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:54,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 910 transitions. [2021-04-15 03:47:54,426 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 910 transitions. Word has length 55 [2021-04-15 03:47:54,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:54,426 INFO L480 AbstractCegarLoop]: Abstraction has 426 states and 910 transitions. [2021-04-15 03:47:54,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 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) [2021-04-15 03:47:54,426 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 910 transitions. [2021-04-15 03:47:54,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-04-15 03:47:54,427 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:54,427 INFO L551 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:54,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-04-15 03:47:54,630 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:54,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:54,630 INFO L82 PathProgramCache]: Analyzing trace with hash -249778565, now seen corresponding path program 29 times [2021-04-15 03:47:54,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:54,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408828601] [2021-04-15 03:47:54,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:54,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:54,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408828601] [2021-04-15 03:47:54,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132380624] [2021-04-15 03:47:54,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:55,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-04-15 03:47:55,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:47:55,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-15 03:47:55,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:47:55,742 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:55,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:55,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-04-15 03:47:55,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855834617] [2021-04-15 03:47:55,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-04-15 03:47:55,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:55,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-04-15 03:47:55,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=2010, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 03:47:55,744 INFO L87 Difference]: Start difference. First operand 426 states and 910 transitions. Second operand has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:01,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:48:01,303 INFO L93 Difference]: Finished difference Result 2725 states and 5348 transitions. [2021-04-15 03:48:01,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-04-15 03:48:01,304 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-04-15 03:48:01,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:48:01,310 INFO L225 Difference]: With dead ends: 2725 [2021-04-15 03:48:01,310 INFO L226 Difference]: Without dead ends: 2239 [2021-04-15 03:48:01,313 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17392 ImplicationChecksByTransitivity, 5108.2ms TimeCoverageRelationStatistics Valid=12230, Invalid=33780, Unknown=0, NotChecked=0, Total=46010 [2021-04-15 03:48:01,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2239 states. [2021-04-15 03:48:01,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2239 to 269. [2021-04-15 03:48:01,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.044776119402985) internal successors, (548), 268 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:01,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 548 transitions. [2021-04-15 03:48:01,325 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 548 transitions. Word has length 57 [2021-04-15 03:48:01,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:48:01,325 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 548 transitions. [2021-04-15 03:48:01,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:01,325 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 548 transitions. [2021-04-15 03:48:01,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-04-15 03:48:01,326 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:48:01,326 INFO L551 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:48:01,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:48:01,541 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:48:01,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:48:01,541 INFO L82 PathProgramCache]: Analyzing trace with hash 969410313, now seen corresponding path program 30 times [2021-04-15 03:48:01,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:48:01,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190628739] [2021-04-15 03:48:01,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:48:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:48:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:48:01,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190628739] [2021-04-15 03:48:01,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206983979] [2021-04-15 03:48:01,710 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:48:01,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-04-15 03:48:01,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:48:01,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-15 03:48:01,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:48:02,425 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:48:02,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:48:02,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 38 [2021-04-15 03:48:02,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37225029] [2021-04-15 03:48:02,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-04-15 03:48:02,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:48:02,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-04-15 03:48:02,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1174, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 03:48:02,428 INFO L87 Difference]: Start difference. First operand 269 states and 548 transitions. Second operand has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 38 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:07,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:48:07,323 INFO L93 Difference]: Finished difference Result 1752 states and 3478 transitions. [2021-04-15 03:48:07,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2021-04-15 03:48:07,324 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 38 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-04-15 03:48:07,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:48:07,327 INFO L225 Difference]: With dead ends: 1752 [2021-04-15 03:48:07,327 INFO L226 Difference]: Without dead ends: 1748 [2021-04-15 03:48:07,333 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17239 ImplicationChecksByTransitivity, 4708.6ms TimeCoverageRelationStatistics Valid=9824, Invalid=31996, Unknown=0, NotChecked=0, Total=41820 [2021-04-15 03:48:07,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2021-04-15 03:48:07,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 229. [2021-04-15 03:48:07,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.057017543859649) internal successors, (469), 228 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:07,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 469 transitions. [2021-04-15 03:48:07,340 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 469 transitions. Word has length 57 [2021-04-15 03:48:07,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:48:07,340 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 469 transitions. [2021-04-15 03:48:07,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 38 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:07,340 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 469 transitions. [2021-04-15 03:48:07,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-04-15 03:48:07,341 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:48:07,341 INFO L551 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:48:07,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-04-15 03:48:07,557 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:48:07,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:48:07,557 INFO L82 PathProgramCache]: Analyzing trace with hash -441843911, now seen corresponding path program 31 times [2021-04-15 03:48:07,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:48:07,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920346957] [2021-04-15 03:48:07,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:48:07,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:48:07,738 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:48:07,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920346957] [2021-04-15 03:48:07,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574185202] [2021-04-15 03:48:07,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:48:07,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:48:07,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 03:48:07,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:48:07,886 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:48:07,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:48:07,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-04-15 03:48:07,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687866065] [2021-04-15 03:48:07,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 03:48:07,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:48:07,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 03:48:07,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:48:07,890 INFO L87 Difference]: Start difference. First operand 229 states and 469 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 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) [2021-04-15 03:48:08,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:48:08,152 INFO L93 Difference]: Finished difference Result 694 states and 1363 transitions. [2021-04-15 03:48:08,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:48:08,153 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 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 59 [2021-04-15 03:48:08,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:48:08,154 INFO L225 Difference]: With dead ends: 694 [2021-04-15 03:48:08,155 INFO L226 Difference]: Without dead ends: 613 [2021-04-15 03:48:08,155 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 143.2ms TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:48:08,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-04-15 03:48:08,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 466. [2021-04-15 03:48:08,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 2.1440860215053763) internal successors, (997), 465 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:08,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 997 transitions. [2021-04-15 03:48:08,162 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 997 transitions. Word has length 59 [2021-04-15 03:48:08,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:48:08,162 INFO L480 AbstractCegarLoop]: Abstraction has 466 states and 997 transitions. [2021-04-15 03:48:08,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 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) [2021-04-15 03:48:08,162 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 997 transitions. [2021-04-15 03:48:08,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-04-15 03:48:08,168 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:48:08,168 INFO L551 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:48:08,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-04-15 03:48:08,389 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:48:08,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:48:08,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1019742149, now seen corresponding path program 32 times [2021-04-15 03:48:08,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:48:08,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961799937] [2021-04-15 03:48:08,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:48:08,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:48:08,810 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:48:08,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961799937] [2021-04-15 03:48:08,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762395458] [2021-04-15 03:48:08,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:48:08,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:48:08,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:48:08,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 03:48:08,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:48:09,583 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:48:09,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:48:09,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 53 [2021-04-15 03:48:09,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546628870] [2021-04-15 03:48:09,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-04-15 03:48:09,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:48:09,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-04-15 03:48:09,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2353, Unknown=0, NotChecked=0, Total=2862 [2021-04-15 03:48:09,584 INFO L87 Difference]: Start difference. First operand 466 states and 997 transitions. Second operand has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:16,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:48:16,646 INFO L93 Difference]: Finished difference Result 3146 states and 6182 transitions. [2021-04-15 03:48:16,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2021-04-15 03:48:16,646 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-04-15 03:48:16,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:48:16,649 INFO L225 Difference]: With dead ends: 3146 [2021-04-15 03:48:16,649 INFO L226 Difference]: Without dead ends: 2576 [2021-04-15 03:48:16,651 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23637 ImplicationChecksByTransitivity, 6339.2ms TimeCoverageRelationStatistics Valid=16125, Invalid=44145, Unknown=0, NotChecked=0, Total=60270 [2021-04-15 03:48:16,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2021-04-15 03:48:16,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 291. [2021-04-15 03:48:16,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.0482758620689654) internal successors, (594), 290 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:16,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 594 transitions. [2021-04-15 03:48:16,663 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 594 transitions. Word has length 61 [2021-04-15 03:48:16,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:48:16,663 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 594 transitions. [2021-04-15 03:48:16,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:16,663 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 594 transitions. [2021-04-15 03:48:16,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-04-15 03:48:16,664 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:48:16,664 INFO L551 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:48:16,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-04-15 03:48:16,877 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:48:16,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:48:16,877 INFO L82 PathProgramCache]: Analyzing trace with hash -820612595, now seen corresponding path program 33 times [2021-04-15 03:48:16,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:48:16,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312941532] [2021-04-15 03:48:16,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:48:16,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:48:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:48:17,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312941532] [2021-04-15 03:48:17,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712926095] [2021-04-15 03:48:17,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:48:17,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-04-15 03:48:17,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:48:17,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 03:48:17,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:48:17,892 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:48:17,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:48:17,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 41 [2021-04-15 03:48:17,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421628151] [2021-04-15 03:48:17,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-04-15 03:48:17,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:48:17,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-04-15 03:48:17,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1369, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 03:48:17,893 INFO L87 Difference]: Start difference. First operand 291 states and 594 transitions. Second operand has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 41 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:24,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:48:24,122 INFO L93 Difference]: Finished difference Result 2040 states and 4054 transitions. [2021-04-15 03:48:24,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2021-04-15 03:48:24,123 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 41 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-04-15 03:48:24,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:48:24,126 INFO L225 Difference]: With dead ends: 2040 [2021-04-15 03:48:24,126 INFO L226 Difference]: Without dead ends: 2036 [2021-04-15 03:48:24,128 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23384 ImplicationChecksByTransitivity, 5910.0ms TimeCoverageRelationStatistics Valid=12911, Invalid=42079, Unknown=0, NotChecked=0, Total=54990 [2021-04-15 03:48:24,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-04-15 03:48:24,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 247. [2021-04-15 03:48:24,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.0609756097560976) internal successors, (507), 246 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:24,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 507 transitions. [2021-04-15 03:48:24,137 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 507 transitions. Word has length 61 [2021-04-15 03:48:24,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:48:24,137 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 507 transitions. [2021-04-15 03:48:24,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 41 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:24,138 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 507 transitions. [2021-04-15 03:48:24,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-04-15 03:48:24,138 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:48:24,138 INFO L551 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:48:24,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-04-15 03:48:24,356 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:48:24,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:48:24,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1642473223, now seen corresponding path program 34 times [2021-04-15 03:48:24,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:48:24,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365245456] [2021-04-15 03:48:24,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:48:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:48:24,564 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:48:24,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365245456] [2021-04-15 03:48:24,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156494160] [2021-04-15 03:48:24,564 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:48:24,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:48:24,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:48:24,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 51 conjunts are in the unsatisfiable core [2021-04-15 03:48:24,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:48:24,720 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:48:24,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:48:24,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-04-15 03:48:24,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455958761] [2021-04-15 03:48:24,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:48:24,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:48:24,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:48:24,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:48:24,723 INFO L87 Difference]: Start difference. First operand 247 states and 507 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:25,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:48:25,030 INFO L93 Difference]: Finished difference Result 753 states and 1480 transitions. [2021-04-15 03:48:25,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:48:25,030 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-04-15 03:48:25,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:48:25,032 INFO L225 Difference]: With dead ends: 753 [2021-04-15 03:48:25,032 INFO L226 Difference]: Without dead ends: 666 [2021-04-15 03:48:25,032 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 169.0ms TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:48:25,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-04-15 03:48:25,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 506. [2021-04-15 03:48:25,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.1465346534653467) internal successors, (1084), 505 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:25,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1084 transitions. [2021-04-15 03:48:25,040 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1084 transitions. Word has length 63 [2021-04-15 03:48:25,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:48:25,040 INFO L480 AbstractCegarLoop]: Abstraction has 506 states and 1084 transitions. [2021-04-15 03:48:25,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:25,040 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1084 transitions. [2021-04-15 03:48:25,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-04-15 03:48:25,041 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:48:25,041 INFO L551 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:48:25,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-04-15 03:48:25,256 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:48:25,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:48:25,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1574993669, now seen corresponding path program 35 times [2021-04-15 03:48:25,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:48:25,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252211020] [2021-04-15 03:48:25,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:48:25,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:48:25,738 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:48:25,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252211020] [2021-04-15 03:48:25,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505734035] [2021-04-15 03:48:25,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:48:25,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-04-15 03:48:25,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:48:25,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 03:48:25,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:48:26,667 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:48:26,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:48:26,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 57 [2021-04-15 03:48:26,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4850433] [2021-04-15 03:48:26,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-04-15 03:48:26,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:48:26,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-04-15 03:48:26,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=2723, Unknown=0, NotChecked=0, Total=3306 [2021-04-15 03:48:26,669 INFO L87 Difference]: Start difference. First operand 506 states and 1084 transitions. Second operand has 58 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 57 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:35,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:48:35,443 INFO L93 Difference]: Finished difference Result 3595 states and 7072 transitions. [2021-04-15 03:48:35,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2021-04-15 03:48:35,444 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 57 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-04-15 03:48:35,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:48:35,450 INFO L225 Difference]: With dead ends: 3595 [2021-04-15 03:48:35,450 INFO L226 Difference]: Without dead ends: 2935 [2021-04-15 03:48:35,454 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31446 ImplicationChecksByTransitivity, 7873.1ms TimeCoverageRelationStatistics Valid=20887, Invalid=56675, Unknown=0, NotChecked=0, Total=77562 [2021-04-15 03:48:35,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2935 states. [2021-04-15 03:48:35,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2935 to 313. [2021-04-15 03:48:35,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.051282051282051) internal successors, (640), 312 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:35,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 640 transitions. [2021-04-15 03:48:35,470 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 640 transitions. Word has length 65 [2021-04-15 03:48:35,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:48:35,470 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 640 transitions. [2021-04-15 03:48:35,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 57 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:35,470 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 640 transitions. [2021-04-15 03:48:35,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-04-15 03:48:35,471 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:48:35,471 INFO L551 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:48:35,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-04-15 03:48:35,672 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:48:35,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:48:35,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1894636305, now seen corresponding path program 36 times [2021-04-15 03:48:35,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:48:35,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585585192] [2021-04-15 03:48:35,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:48:35,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:48:35,884 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:48:35,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585585192] [2021-04-15 03:48:35,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096811494] [2021-04-15 03:48:35,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 03:48:35,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-04-15 03:48:35,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:48:35,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 03:48:35,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:48:36,742 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:48:36,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:48:36,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29] total 44 [2021-04-15 03:48:36,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999472341] [2021-04-15 03:48:36,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-04-15 03:48:36,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:48:36,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-04-15 03:48:36,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1579, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 03:48:36,743 INFO L87 Difference]: Start difference. First operand 313 states and 640 transitions. Second operand has 45 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 44 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:44,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:48:44,535 INFO L93 Difference]: Finished difference Result 2350 states and 4674 transitions. [2021-04-15 03:48:44,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2021-04-15 03:48:44,536 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 44 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-04-15 03:48:44,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:48:44,539 INFO L225 Difference]: With dead ends: 2350 [2021-04-15 03:48:44,539 INFO L226 Difference]: Without dead ends: 2346 [2021-04-15 03:48:44,543 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31044 ImplicationChecksByTransitivity, 7327.8ms TimeCoverageRelationStatistics Valid=16676, Invalid=54346, Unknown=0, NotChecked=0, Total=71022 [2021-04-15 03:48:44,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-04-15 03:48:44,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 265. [2021-04-15 03:48:44,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.0643939393939394) internal successors, (545), 264 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:44,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 545 transitions. [2021-04-15 03:48:44,556 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 545 transitions. Word has length 65 [2021-04-15 03:48:44,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:48:44,556 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 545 transitions. [2021-04-15 03:48:44,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 44 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:44,556 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 545 transitions. [2021-04-15 03:48:44,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-04-15 03:48:44,557 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:48:44,557 INFO L551 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:48:44,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-04-15 03:48:44,773 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:48:44,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:48:44,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1631728057, now seen corresponding path program 37 times [2021-04-15 03:48:44,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:48:44,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283586573] [2021-04-15 03:48:44,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:48:44,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:48:44,984 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:48:44,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283586573] [2021-04-15 03:48:44,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872477180] [2021-04-15 03:48:44,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:48:45,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:48:45,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 55 conjunts are in the unsatisfiable core [2021-04-15 03:48:45,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:48:45,139 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:48:45,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:48:45,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-04-15 03:48:45,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655236281] [2021-04-15 03:48:45,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 03:48:45,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:48:45,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 03:48:45,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:48:45,140 INFO L87 Difference]: Start difference. First operand 265 states and 545 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 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) [2021-04-15 03:48:45,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:48:45,454 INFO L93 Difference]: Finished difference Result 812 states and 1597 transitions. [2021-04-15 03:48:45,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:48:45,455 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 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 67 [2021-04-15 03:48:45,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:48:45,456 INFO L225 Difference]: With dead ends: 812 [2021-04-15 03:48:45,456 INFO L226 Difference]: Without dead ends: 719 [2021-04-15 03:48:45,456 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 171.2ms TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:48:45,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-04-15 03:48:45,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 546. [2021-04-15 03:48:45,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 2.148623853211009) internal successors, (1171), 545 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:45,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1171 transitions. [2021-04-15 03:48:45,465 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1171 transitions. Word has length 67 [2021-04-15 03:48:45,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:48:45,465 INFO L480 AbstractCegarLoop]: Abstraction has 546 states and 1171 transitions. [2021-04-15 03:48:45,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 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) [2021-04-15 03:48:45,465 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1171 transitions. [2021-04-15 03:48:45,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-04-15 03:48:45,466 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:48:45,466 INFO L551 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:48:45,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-04-15 03:48:45,685 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:48:45,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:48:45,685 INFO L82 PathProgramCache]: Analyzing trace with hash 441452731, now seen corresponding path program 38 times [2021-04-15 03:48:45,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:48:45,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641656658] [2021-04-15 03:48:45,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:48:45,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:48:46,155 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:48:46,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641656658] [2021-04-15 03:48:46,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769745203] [2021-04-15 03:48:46,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:48:46,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:48:46,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:48:46,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 03:48:46,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:48:47,191 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:48:47,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:48:47,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 61 [2021-04-15 03:48:47,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37828453] [2021-04-15 03:48:47,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-04-15 03:48:47,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:48:47,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-04-15 03:48:47,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=662, Invalid=3120, Unknown=0, NotChecked=0, Total=3782 [2021-04-15 03:48:47,192 INFO L87 Difference]: Start difference. First operand 546 states and 1171 transitions. Second operand has 62 states, 62 states have (on average 2.129032258064516) internal successors, (132), 61 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:58,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:48:58,535 INFO L93 Difference]: Finished difference Result 4072 states and 8018 transitions. [2021-04-15 03:48:58,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2021-04-15 03:48:58,536 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.129032258064516) internal successors, (132), 61 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-04-15 03:48:58,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:48:58,541 INFO L225 Difference]: With dead ends: 4072 [2021-04-15 03:48:58,542 INFO L226 Difference]: Without dead ends: 3316 [2021-04-15 03:48:58,546 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41063 ImplicationChecksByTransitivity, 9796.7ms TimeCoverageRelationStatistics Valid=26637, Invalid=71645, Unknown=0, NotChecked=0, Total=98282 [2021-04-15 03:48:58,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3316 states. [2021-04-15 03:48:58,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3316 to 335. [2021-04-15 03:48:58,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.053892215568862) internal successors, (686), 334 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:58,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 686 transitions. [2021-04-15 03:48:58,563 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 686 transitions. Word has length 69 [2021-04-15 03:48:58,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:48:58,564 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 686 transitions. [2021-04-15 03:48:58,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.129032258064516) internal successors, (132), 61 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:58,564 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 686 transitions. [2021-04-15 03:48:58,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-04-15 03:48:58,565 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:48:58,565 INFO L551 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:48:58,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:48:58,781 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:48:58,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:48:58,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1349041643, now seen corresponding path program 39 times [2021-04-15 03:48:58,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:48:58,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37479754] [2021-04-15 03:48:58,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:48:58,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:48:59,061 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:48:59,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37479754] [2021-04-15 03:48:59,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312552333] [2021-04-15 03:48:59,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:48:59,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-04-15 03:48:59,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:48:59,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 03:48:59,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:49:00,067 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:49:00,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:49:00,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 31] total 47 [2021-04-15 03:49:00,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704622386] [2021-04-15 03:49:00,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-04-15 03:49:00,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:49:00,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-04-15 03:49:00,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=1804, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 03:49:00,068 INFO L87 Difference]: Start difference. First operand 335 states and 686 transitions. Second operand has 48 states, 48 states have (on average 2.6666666666666665) internal successors, (128), 47 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:49:09,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:49:09,902 INFO L93 Difference]: Finished difference Result 2682 states and 5338 transitions. [2021-04-15 03:49:09,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2021-04-15 03:49:09,903 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.6666666666666665) internal successors, (128), 47 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-04-15 03:49:09,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:49:09,906 INFO L225 Difference]: With dead ends: 2682 [2021-04-15 03:49:09,907 INFO L226 Difference]: Without dead ends: 2678 [2021-04-15 03:49:09,912 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40450 ImplicationChecksByTransitivity, 9238.0ms TimeCoverageRelationStatistics Valid=21212, Invalid=69088, Unknown=0, NotChecked=0, Total=90300 [2021-04-15 03:49:09,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2678 states. [2021-04-15 03:49:09,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2678 to 283. [2021-04-15 03:49:09,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.0673758865248226) internal successors, (583), 282 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:49:09,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 583 transitions. [2021-04-15 03:49:09,926 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 583 transitions. Word has length 69 [2021-04-15 03:49:09,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:49:09,926 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 583 transitions. [2021-04-15 03:49:09,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.6666666666666665) internal successors, (128), 47 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:49:09,926 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 583 transitions. [2021-04-15 03:49:09,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-04-15 03:49:09,927 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:49:09,927 INFO L551 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:49:10,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:49:10,152 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:49:10,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:49:10,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1888499335, now seen corresponding path program 40 times [2021-04-15 03:49:10,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:49:10,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197001090] [2021-04-15 03:49:10,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:49:10,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:49:10,419 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:49:10,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197001090] [2021-04-15 03:49:10,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935774703] [2021-04-15 03:49:10,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:49:10,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:49:10,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:49:10,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 59 conjunts are in the unsatisfiable core [2021-04-15 03:49:10,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:49:10,623 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:49:10,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:49:10,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-04-15 03:49:10,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589386921] [2021-04-15 03:49:10,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 03:49:10,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:49:10,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 03:49:10,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:49:10,625 INFO L87 Difference]: Start difference. First operand 283 states and 583 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:49:11,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:49:11,019 INFO L93 Difference]: Finished difference Result 871 states and 1714 transitions. [2021-04-15 03:49:11,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:49:11,019 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-04-15 03:49:11,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:49:11,021 INFO L225 Difference]: With dead ends: 871 [2021-04-15 03:49:11,021 INFO L226 Difference]: Without dead ends: 772 [2021-04-15 03:49:11,021 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 220.1ms TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:49:11,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-04-15 03:49:11,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 586. [2021-04-15 03:49:11,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 2.1504273504273503) internal successors, (1258), 585 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:49:11,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1258 transitions. [2021-04-15 03:49:11,029 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1258 transitions. Word has length 71 [2021-04-15 03:49:11,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:49:11,029 INFO L480 AbstractCegarLoop]: Abstraction has 586 states and 1258 transitions. [2021-04-15 03:49:11,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:49:11,029 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1258 transitions. [2021-04-15 03:49:11,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-04-15 03:49:11,031 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:49:11,031 INFO L551 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:49:11,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-04-15 03:49:11,245 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:49:11,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:49:11,245 INFO L82 PathProgramCache]: Analyzing trace with hash -808038533, now seen corresponding path program 41 times [2021-04-15 03:49:11,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:49:11,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404375904] [2021-04-15 03:49:11,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:49:11,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:49:11,794 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:49:11,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404375904] [2021-04-15 03:49:11,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871868192] [2021-04-15 03:49:11,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:49:11,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-04-15 03:49:11,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:49:11,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 33 conjunts are in the unsatisfiable core [2021-04-15 03:49:11,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:49:13,022 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:49:13,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:49:13,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 65 [2021-04-15 03:49:13,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448151548] [2021-04-15 03:49:13,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-04-15 03:49:13,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:49:13,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-04-15 03:49:13,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=3544, Unknown=0, NotChecked=0, Total=4290 [2021-04-15 03:49:13,024 INFO L87 Difference]: Start difference. First operand 586 states and 1258 transitions. Second operand has 66 states, 66 states have (on average 2.121212121212121) internal successors, (140), 65 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:49:27,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:49:27,432 INFO L93 Difference]: Finished difference Result 4577 states and 9020 transitions. [2021-04-15 03:49:27,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 289 states. [2021-04-15 03:49:27,433 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.121212121212121) internal successors, (140), 65 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-04-15 03:49:27,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:49:27,460 INFO L225 Difference]: With dead ends: 4577 [2021-04-15 03:49:27,460 INFO L226 Difference]: Without dead ends: 3719 [2021-04-15 03:49:27,464 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52751 ImplicationChecksByTransitivity, 12351.2ms TimeCoverageRelationStatistics Valid=33504, Invalid=89346, Unknown=0, NotChecked=0, Total=122850 [2021-04-15 03:49:27,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3719 states. [2021-04-15 03:49:27,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3719 to 357. [2021-04-15 03:49:27,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.056179775280899) internal successors, (732), 356 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:49:27,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 732 transitions. [2021-04-15 03:49:27,485 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 732 transitions. Word has length 73 [2021-04-15 03:49:27,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:49:27,485 INFO L480 AbstractCegarLoop]: Abstraction has 357 states and 732 transitions. [2021-04-15 03:49:27,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.121212121212121) internal successors, (140), 65 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:49:27,485 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 732 transitions. [2021-04-15 03:49:27,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-04-15 03:49:27,486 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:49:27,486 INFO L551 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:49:27,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:49:27,693 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:49:27,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:49:27,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1893443353, now seen corresponding path program 42 times [2021-04-15 03:49:27,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:49:27,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998377192] [2021-04-15 03:49:27,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:49:27,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:49:28,018 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:49:28,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998377192] [2021-04-15 03:49:28,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054666413] [2021-04-15 03:49:28,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:49:28,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-04-15 03:49:28,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:49:28,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 33 conjunts are in the unsatisfiable core [2021-04-15 03:49:28,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:49:29,198 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:49:29,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:49:29,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 33] total 50 [2021-04-15 03:49:29,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754197066] [2021-04-15 03:49:29,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-04-15 03:49:29,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:49:29,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-04-15 03:49:29,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=2044, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 03:49:29,200 INFO L87 Difference]: Start difference. First operand 357 states and 732 transitions. Second operand has 51 states, 51 states have (on average 2.6666666666666665) internal successors, (136), 50 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:49:42,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:49:42,835 INFO L93 Difference]: Finished difference Result 3036 states and 6046 transitions. [2021-04-15 03:49:42,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2021-04-15 03:49:42,836 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.6666666666666665) internal successors, (136), 50 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-04-15 03:49:42,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:49:42,839 INFO L225 Difference]: With dead ends: 3036 [2021-04-15 03:49:42,839 INFO L226 Difference]: Without dead ends: 3032 [2021-04-15 03:49:42,844 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51850 ImplicationChecksByTransitivity, 12587.8ms TimeCoverageRelationStatistics Valid=26618, Invalid=86614, Unknown=0, NotChecked=0, Total=113232 [2021-04-15 03:49:42,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-04-15 03:49:42,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 301. [2021-04-15 03:49:42,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.07) internal successors, (621), 300 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:49:42,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 621 transitions. [2021-04-15 03:49:42,856 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 621 transitions. Word has length 73 [2021-04-15 03:49:42,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:49:42,856 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 621 transitions. [2021-04-15 03:49:42,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.6666666666666665) internal successors, (136), 50 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:49:42,856 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 621 transitions. [2021-04-15 03:49:42,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-04-15 03:49:42,857 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:49:42,857 INFO L551 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:49:43,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:49:43,070 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:49:43,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:49:43,071 INFO L82 PathProgramCache]: Analyzing trace with hash -58761159, now seen corresponding path program 43 times [2021-04-15 03:49:43,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:49:43,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619604664] [2021-04-15 03:49:43,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:49:43,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:49:43,461 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:49:43,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619604664] [2021-04-15 03:49:43,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744624392] [2021-04-15 03:49:43,461 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:49:43,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:49:43,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 63 conjunts are in the unsatisfiable core [2021-04-15 03:49:43,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:49:43,702 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:49:43,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:49:43,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-04-15 03:49:43,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711348932] [2021-04-15 03:49:43,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 03:49:43,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:49:43,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 03:49:43,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-04-15 03:49:43,703 INFO L87 Difference]: Start difference. First operand 301 states and 621 transitions. Second operand has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:49:44,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:49:44,239 INFO L93 Difference]: Finished difference Result 930 states and 1831 transitions. [2021-04-15 03:49:44,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:49:44,239 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-04-15 03:49:44,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:49:44,240 INFO L225 Difference]: With dead ends: 930 [2021-04-15 03:49:44,240 INFO L226 Difference]: Without dead ends: 825 [2021-04-15 03:49:44,241 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 296.4ms TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-04-15 03:49:44,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-04-15 03:49:44,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 626. [2021-04-15 03:49:44,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 2.152) internal successors, (1345), 625 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:49:44,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1345 transitions. [2021-04-15 03:49:44,249 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1345 transitions. Word has length 75 [2021-04-15 03:49:44,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:49:44,249 INFO L480 AbstractCegarLoop]: Abstraction has 626 states and 1345 transitions. [2021-04-15 03:49:44,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:49:44,249 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1345 transitions. [2021-04-15 03:49:44,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-04-15 03:49:44,250 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:49:44,250 INFO L551 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:49:44,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-04-15 03:49:44,469 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:49:44,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:49:44,469 INFO L82 PathProgramCache]: Analyzing trace with hash -95480517, now seen corresponding path program 44 times [2021-04-15 03:49:44,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:49:44,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477929409] [2021-04-15 03:49:44,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:49:44,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:49:45,259 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:49:45,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477929409] [2021-04-15 03:49:45,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333099049] [2021-04-15 03:49:45,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:49:45,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:49:45,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:49:45,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 03:49:45,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:49:46,839 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:49:46,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:49:46,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 69 [2021-04-15 03:49:46,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085171175] [2021-04-15 03:49:46,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-04-15 03:49:46,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:49:46,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-04-15 03:49:46,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=3995, Unknown=0, NotChecked=0, Total=4830 [2021-04-15 03:49:46,841 INFO L87 Difference]: Start difference. First operand 626 states and 1345 transitions. Second operand has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:50:08,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:50:08,796 INFO L93 Difference]: Finished difference Result 5110 states and 10078 transitions. [2021-04-15 03:50:08,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 324 states. [2021-04-15 03:50:08,798 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-04-15 03:50:08,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:50:08,802 INFO L225 Difference]: With dead ends: 5110 [2021-04-15 03:50:08,802 INFO L226 Difference]: Without dead ends: 4144 [2021-04-15 03:50:08,809 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 388 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66790 ImplicationChecksByTransitivity, 18848.5ms TimeCoverageRelationStatistics Valid=41625, Invalid=110085, Unknown=0, NotChecked=0, Total=151710 [2021-04-15 03:50:08,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2021-04-15 03:50:08,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 379. [2021-04-15 03:50:08,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.058201058201058) internal successors, (778), 378 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:50:08,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 778 transitions. [2021-04-15 03:50:08,825 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 778 transitions. Word has length 77 [2021-04-15 03:50:08,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:50:08,825 INFO L480 AbstractCegarLoop]: Abstraction has 379 states and 778 transitions. [2021-04-15 03:50:08,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:50:08,826 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 778 transitions. [2021-04-15 03:50:08,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-04-15 03:50:08,826 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:50:08,826 INFO L551 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:50:09,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-04-15 03:50:09,038 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:50:09,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:50:09,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1341912547, now seen corresponding path program 45 times [2021-04-15 03:50:09,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:50:09,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508579819] [2021-04-15 03:50:09,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:50:09,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:50:09,476 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:50:09,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508579819] [2021-04-15 03:50:09,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257908438] [2021-04-15 03:50:09,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:50:09,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-04-15 03:50:09,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:50:09,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 03:50:09,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:50:11,212 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:50:11,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:50:11,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 35] total 53 [2021-04-15 03:50:11,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662871001] [2021-04-15 03:50:11,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-04-15 03:50:11,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:50:11,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-04-15 03:50:11,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=2299, Unknown=0, NotChecked=0, Total=2862 [2021-04-15 03:50:11,213 INFO L87 Difference]: Start difference. First operand 379 states and 778 transitions. Second operand has 54 states, 54 states have (on average 2.6666666666666665) internal successors, (144), 53 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:50:32,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:50:32,028 INFO L93 Difference]: Finished difference Result 3412 states and 6798 transitions. [2021-04-15 03:50:32,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 325 states. [2021-04-15 03:50:32,030 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.6666666666666665) internal successors, (144), 53 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-04-15 03:50:32,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:50:32,033 INFO L225 Difference]: With dead ends: 3412 [2021-04-15 03:50:32,033 INFO L226 Difference]: Without dead ends: 3408 [2021-04-15 03:50:32,038 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 373 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65508 ImplicationChecksByTransitivity, 19225.0ms TimeCoverageRelationStatistics Valid=32999, Invalid=107251, Unknown=0, NotChecked=0, Total=140250 [2021-04-15 03:50:32,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2021-04-15 03:50:32,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 319. [2021-04-15 03:50:32,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.0723270440251573) internal successors, (659), 318 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:50:32,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 659 transitions. [2021-04-15 03:50:32,050 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 659 transitions. Word has length 77 [2021-04-15 03:50:32,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:50:32,050 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 659 transitions. [2021-04-15 03:50:32,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.6666666666666665) internal successors, (144), 53 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:50:32,050 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 659 transitions. [2021-04-15 03:50:32,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-04-15 03:50:32,051 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:50:32,051 INFO L551 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:50:32,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-04-15 03:50:32,255 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:50:32,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:50:32,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1809692153, now seen corresponding path program 46 times [2021-04-15 03:50:32,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:50:32,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150057204] [2021-04-15 03:50:32,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:50:32,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:50:32,721 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:50:32,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150057204] [2021-04-15 03:50:32,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740541409] [2021-04-15 03:50:32,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 03:50:32,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:50:32,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:50:32,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 67 conjunts are in the unsatisfiable core [2021-04-15 03:50:32,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:50:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:50:33,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:50:33,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-04-15 03:50:33,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785105139] [2021-04-15 03:50:33,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:50:33,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:50:33,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:50:33,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:50:33,022 INFO L87 Difference]: Start difference. First operand 319 states and 659 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 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) [2021-04-15 03:50:33,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:50:33,871 INFO L93 Difference]: Finished difference Result 989 states and 1948 transitions. [2021-04-15 03:50:33,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:50:33,872 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-04-15 03:50:33,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:50:33,873 INFO L225 Difference]: With dead ends: 989 [2021-04-15 03:50:33,873 INFO L226 Difference]: Without dead ends: 878 [2021-04-15 03:50:33,873 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 396.2ms TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:50:33,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-04-15 03:50:33,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 666. [2021-04-15 03:50:33,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 2.1533834586466165) internal successors, (1432), 665 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:50:33,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1432 transitions. [2021-04-15 03:50:33,880 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1432 transitions. Word has length 79 [2021-04-15 03:50:33,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:50:33,880 INFO L480 AbstractCegarLoop]: Abstraction has 666 states and 1432 transitions. [2021-04-15 03:50:33,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 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) [2021-04-15 03:50:33,880 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1432 transitions. [2021-04-15 03:50:33,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-04-15 03:50:33,881 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:50:33,881 INFO L551 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:50:34,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:50:34,082 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:50:34,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:50:34,082 INFO L82 PathProgramCache]: Analyzing trace with hash -521725445, now seen corresponding path program 47 times [2021-04-15 03:50:34,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:50:34,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268282325] [2021-04-15 03:50:34,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:50:34,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:50:35,364 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:50:35,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268282325] [2021-04-15 03:50:35,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525408126] [2021-04-15 03:50:35,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:50:35,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-04-15 03:50:35,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:50:35,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 37 conjunts are in the unsatisfiable core [2021-04-15 03:50:35,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:50:37,752 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:50:37,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:50:37,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 73 [2021-04-15 03:50:37,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586960744] [2021-04-15 03:50:37,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-04-15 03:50:37,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:50:37,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-04-15 03:50:37,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=4473, Unknown=0, NotChecked=0, Total=5402 [2021-04-15 03:50:37,755 INFO L87 Difference]: Start difference. First operand 666 states and 1432 transitions. Second operand has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:51:08,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:51:08,334 INFO L93 Difference]: Finished difference Result 5671 states and 11192 transitions. [2021-04-15 03:51:08,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 361 states. [2021-04-15 03:51:08,337 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-04-15 03:51:08,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:51:08,342 INFO L225 Difference]: With dead ends: 5671 [2021-04-15 03:51:08,342 INFO L226 Difference]: Without dead ends: 4591 [2021-04-15 03:51:08,351 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 429 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83479 ImplicationChecksByTransitivity, 27798.6ms TimeCoverageRelationStatistics Valid=51145, Invalid=134185, Unknown=0, NotChecked=0, Total=185330 [2021-04-15 03:51:08,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4591 states. [2021-04-15 03:51:08,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4591 to 401. [2021-04-15 03:51:08,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.06) internal successors, (824), 400 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:51:08,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 824 transitions. [2021-04-15 03:51:08,371 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 824 transitions. Word has length 81 [2021-04-15 03:51:08,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:51:08,371 INFO L480 AbstractCegarLoop]: Abstraction has 401 states and 824 transitions. [2021-04-15 03:51:08,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:51:08,372 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 824 transitions. [2021-04-15 03:51:08,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-04-15 03:51:08,372 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:51:08,372 INFO L551 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:51:08,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-04-15 03:51:08,594 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:51:08,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:51:08,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1037658913, now seen corresponding path program 48 times [2021-04-15 03:51:08,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:51:08,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313705583] [2021-04-15 03:51:08,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:51:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:51:09,189 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:51:09,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313705583] [2021-04-15 03:51:09,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683983400] [2021-04-15 03:51:09,190 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:51:09,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-04-15 03:51:09,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:51:09,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 37 conjunts are in the unsatisfiable core [2021-04-15 03:51:09,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:51:11,869 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:51:11,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:51:11,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 37] total 56 [2021-04-15 03:51:11,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683452969] [2021-04-15 03:51:11,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-04-15 03:51:11,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:51:11,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-04-15 03:51:11,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=2569, Unknown=0, NotChecked=0, Total=3192 [2021-04-15 03:51:11,871 INFO L87 Difference]: Start difference. First operand 401 states and 824 transitions. Second operand has 57 states, 57 states have (on average 2.6666666666666665) internal successors, (152), 56 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:51:41,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:51:41,894 INFO L93 Difference]: Finished difference Result 3810 states and 7594 transitions. [2021-04-15 03:51:41,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 362 states. [2021-04-15 03:51:41,895 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.6666666666666665) internal successors, (152), 56 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-04-15 03:51:41,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:51:41,898 INFO L225 Difference]: With dead ends: 3810 [2021-04-15 03:51:41,898 INFO L226 Difference]: Without dead ends: 3806 [2021-04-15 03:51:41,904 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 413 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81705 ImplicationChecksByTransitivity, 28251.6ms TimeCoverageRelationStatistics Valid=40466, Invalid=131344, Unknown=0, NotChecked=0, Total=171810 [2021-04-15 03:51:41,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2021-04-15 03:51:41,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 337. [2021-04-15 03:51:41,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.074404761904762) internal successors, (697), 336 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:51:41,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 697 transitions. [2021-04-15 03:51:41,915 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 697 transitions. Word has length 81 [2021-04-15 03:51:41,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:51:41,915 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 697 transitions. [2021-04-15 03:51:41,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.6666666666666665) internal successors, (152), 56 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:51:41,916 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 697 transitions. [2021-04-15 03:51:41,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-04-15 03:51:41,916 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:51:41,916 INFO L551 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:51:42,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:51:42,117 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:51:42,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:51:42,117 INFO L82 PathProgramCache]: Analyzing trace with hash 210209465, now seen corresponding path program 49 times [2021-04-15 03:51:42,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:51:42,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40810868] [2021-04-15 03:51:42,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:51:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:51:42,886 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:51:42,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40810868] [2021-04-15 03:51:42,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456155205] [2021-04-15 03:51:42,887 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:51:42,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:51:42,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 71 conjunts are in the unsatisfiable core [2021-04-15 03:51:42,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:51:43,329 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:51:43,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:51:43,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-04-15 03:51:43,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474339756] [2021-04-15 03:51:43,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 03:51:43,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:51:43,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 03:51:43,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-04-15 03:51:43,330 INFO L87 Difference]: Start difference. First operand 337 states and 697 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:51:44,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:51:44,598 INFO L93 Difference]: Finished difference Result 1048 states and 2065 transitions. [2021-04-15 03:51:44,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:51:44,600 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-04-15 03:51:44,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:51:44,601 INFO L225 Difference]: With dead ends: 1048 [2021-04-15 03:51:44,601 INFO L226 Difference]: Without dead ends: 931 [2021-04-15 03:51:44,601 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 688.4ms TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-04-15 03:51:44,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-04-15 03:51:44,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 706. [2021-04-15 03:51:44,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 2.1546099290780143) internal successors, (1519), 705 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:51:44,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1519 transitions. [2021-04-15 03:51:44,608 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1519 transitions. Word has length 83 [2021-04-15 03:51:44,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:51:44,608 INFO L480 AbstractCegarLoop]: Abstraction has 706 states and 1519 transitions. [2021-04-15 03:51:44,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:51:44,608 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1519 transitions. [2021-04-15 03:51:44,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-04-15 03:51:44,609 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:51:44,609 INFO L551 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:51:44,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:51:44,809 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:51:44,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:51:44,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1448811963, now seen corresponding path program 50 times [2021-04-15 03:51:44,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:51:44,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97232284] [2021-04-15 03:51:44,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:51:44,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:51:46,362 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:51:46,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97232284] [2021-04-15 03:51:46,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497776502] [2021-04-15 03:51:46,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 03:51:46,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:51:46,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:51:46,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjunts are in the unsatisfiable core [2021-04-15 03:51:46,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:51:49,833 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:51:49,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:51:49,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 77 [2021-04-15 03:51:49,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110938255] [2021-04-15 03:51:49,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-04-15 03:51:49,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:51:49,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-04-15 03:51:49,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1028, Invalid=4978, Unknown=0, NotChecked=0, Total=6006 [2021-04-15 03:51:49,836 INFO L87 Difference]: Start difference. First operand 706 states and 1519 transitions. Second operand has 78 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 77 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:52:37,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:52:37,823 INFO L93 Difference]: Finished difference Result 6260 states and 12362 transitions. [2021-04-15 03:52:37,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 400 states. [2021-04-15 03:52:37,827 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 77 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-04-15 03:52:37,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:52:37,832 INFO L225 Difference]: With dead ends: 6260 [2021-04-15 03:52:37,832 INFO L226 Difference]: Without dead ends: 5060 [2021-04-15 03:52:37,841 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 472 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103134 ImplicationChecksByTransitivity, 43792.3ms TimeCoverageRelationStatistics Valid=62217, Invalid=161985, Unknown=0, NotChecked=0, Total=224202 [2021-04-15 03:52:37,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5060 states. [2021-04-15 03:52:37,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5060 to 423. [2021-04-15 03:52:37,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 2.061611374407583) internal successors, (870), 422 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:52:37,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 870 transitions. [2021-04-15 03:52:37,859 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 870 transitions. Word has length 85 [2021-04-15 03:52:37,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:52:37,859 INFO L480 AbstractCegarLoop]: Abstraction has 423 states and 870 transitions. [2021-04-15 03:52:37,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 77 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:52:37,860 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 870 transitions. [2021-04-15 03:52:37,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-04-15 03:52:37,860 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:52:37,860 INFO L551 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:52:38,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-04-15 03:52:38,084 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:52:38,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:52:38,085 INFO L82 PathProgramCache]: Analyzing trace with hash -2136683995, now seen corresponding path program 51 times [2021-04-15 03:52:38,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:52:38,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266018491] [2021-04-15 03:52:38,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:52:38,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:52:39,244 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:52:39,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266018491] [2021-04-15 03:52:39,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220312873] [2021-04-15 03:52:39,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:52:39,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-04-15 03:52:39,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:52:39,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjunts are in the unsatisfiable core [2021-04-15 03:52:39,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:52:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:52:44,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:52:44,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 39] total 59 [2021-04-15 03:52:44,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775944331] [2021-04-15 03:52:44,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-04-15 03:52:44,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:52:44,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-04-15 03:52:44,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=686, Invalid=2854, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 03:52:44,195 INFO L87 Difference]: Start difference. First operand 423 states and 870 transitions. Second operand has 60 states, 60 states have (on average 2.6666666666666665) internal successors, (160), 59 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:53:40,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:53:40,232 INFO L93 Difference]: Finished difference Result 4230 states and 8434 transitions. [2021-04-15 03:53:40,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 401 states. [2021-04-15 03:53:40,236 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.6666666666666665) internal successors, (160), 59 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-04-15 03:53:40,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:53:40,241 INFO L225 Difference]: With dead ends: 4230 [2021-04-15 03:53:40,242 INFO L226 Difference]: Without dead ends: 4226 [2021-04-15 03:53:40,254 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 455 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100738 ImplicationChecksByTransitivity, 54659.7ms TimeCoverageRelationStatistics Valid=49136, Invalid=159256, Unknown=0, NotChecked=0, Total=208392 [2021-04-15 03:53:40,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-04-15 03:53:40,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 355. [2021-04-15 03:53:40,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.0762711864406778) internal successors, (735), 354 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:53:40,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 735 transitions. [2021-04-15 03:53:40,270 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 735 transitions. Word has length 85 [2021-04-15 03:53:40,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:53:40,270 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 735 transitions. [2021-04-15 03:53:40,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.6666666666666665) internal successors, (160), 59 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:53:40,270 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 735 transitions. [2021-04-15 03:53:40,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-04-15 03:53:40,271 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:53:40,271 INFO L551 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:53:40,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:53:40,472 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:53:40,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:53:40,472 INFO L82 PathProgramCache]: Analyzing trace with hash -183918983, now seen corresponding path program 52 times [2021-04-15 03:53:40,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:53:40,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675316825] [2021-04-15 03:53:40,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:53:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:53:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:53:41,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675316825] [2021-04-15 03:53:41,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527495884] [2021-04-15 03:53:41,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:53:41,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:53:41,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:53:41,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 75 conjunts are in the unsatisfiable core [2021-04-15 03:53:41,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:53:42,522 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:53:42,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:53:42,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2021-04-15 03:53:42,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862688533] [2021-04-15 03:53:42,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:53:42,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:53:42,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:53:42,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:53:42,523 INFO L87 Difference]: Start difference. First operand 355 states and 735 transitions. Second operand has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:53:45,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:53:45,312 INFO L93 Difference]: Finished difference Result 1107 states and 2182 transitions. [2021-04-15 03:53:45,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:53:45,316 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-04-15 03:53:45,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:53:45,317 INFO L225 Difference]: With dead ends: 1107 [2021-04-15 03:53:45,317 INFO L226 Difference]: Without dead ends: 984 [2021-04-15 03:53:45,318 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1139.9ms TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:53:45,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2021-04-15 03:53:45,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 746. [2021-04-15 03:53:45,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 2.155704697986577) internal successors, (1606), 745 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:53:45,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1606 transitions. [2021-04-15 03:53:45,325 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1606 transitions. Word has length 87 [2021-04-15 03:53:45,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:53:45,325 INFO L480 AbstractCegarLoop]: Abstraction has 746 states and 1606 transitions. [2021-04-15 03:53:45,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:53:45,325 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1606 transitions. [2021-04-15 03:53:45,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-04-15 03:53:45,326 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:53:45,326 INFO L551 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:53:45,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-04-15 03:53:45,527 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:53:45,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:53:45,527 INFO L82 PathProgramCache]: Analyzing trace with hash 888660091, now seen corresponding path program 53 times [2021-04-15 03:53:45,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:53:45,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910354254] [2021-04-15 03:53:45,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:53:45,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:53:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:53:48,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910354254] [2021-04-15 03:53:48,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851482698] [2021-04-15 03:53:48,640 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:53:48,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-04-15 03:53:48,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:53:48,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 41 conjunts are in the unsatisfiable core [2021-04-15 03:53:48,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:53:55,629 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:53:55,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:53:55,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 81 [2021-04-15 03:53:55,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822930497] [2021-04-15 03:53:55,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-04-15 03:53:55,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:53:55,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-04-15 03:53:55,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=5510, Unknown=0, NotChecked=0, Total=6642 [2021-04-15 03:53:55,631 INFO L87 Difference]: Start difference. First operand 746 states and 1606 transitions. Second operand has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:26,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:26,098 INFO L93 Difference]: Finished difference Result 6877 states and 13588 transitions. [2021-04-15 03:55:26,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 441 states. [2021-04-15 03:55:26,102 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-04-15 03:55:26,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:26,123 INFO L225 Difference]: With dead ends: 6877 [2021-04-15 03:55:26,123 INFO L226 Difference]: Without dead ends: 5551 [2021-04-15 03:55:26,149 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 517 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126090 ImplicationChecksByTransitivity, 84003.4ms TimeCoverageRelationStatistics Valid=75002, Invalid=193840, Unknown=0, NotChecked=0, Total=268842 [2021-04-15 03:55:26,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5551 states. [2021-04-15 03:55:26,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5551 to 445. [2021-04-15 03:55:26,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 2.063063063063063) internal successors, (916), 444 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:26,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 916 transitions. [2021-04-15 03:55:26,184 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 916 transitions. Word has length 89 [2021-04-15 03:55:26,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:26,184 INFO L480 AbstractCegarLoop]: Abstraction has 445 states and 916 transitions. [2021-04-15 03:55:26,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:26,184 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 916 transitions. [2021-04-15 03:55:26,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-04-15 03:55:26,185 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:26,185 INFO L551 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:26,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-04-15 03:55:26,409 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:26,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:26,409 INFO L82 PathProgramCache]: Analyzing trace with hash 875505449, now seen corresponding path program 54 times [2021-04-15 03:55:26,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:26,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791338802] [2021-04-15 03:55:26,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:26,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:27,795 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:27,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791338802] [2021-04-15 03:55:27,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054715905] [2021-04-15 03:55:27,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:27,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-04-15 03:55:27,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:27,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 41 conjunts are in the unsatisfiable core [2021-04-15 03:55:27,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:35,548 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:35,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:35,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41] total 62 [2021-04-15 03:55:35,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530652993] [2021-04-15 03:55:35,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-04-15 03:55:35,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:35,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-04-15 03:55:35,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=752, Invalid=3154, Unknown=0, NotChecked=0, Total=3906 [2021-04-15 03:55:35,549 INFO L87 Difference]: Start difference. First operand 445 states and 916 transitions. Second operand has 63 states, 63 states have (on average 2.6666666666666665) internal successors, (168), 62 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:05,288 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2021-04-15 03:56:27,554 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2021-04-15 03:56:59,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:56:59,923 INFO L93 Difference]: Finished difference Result 4672 states and 9318 transitions. [2021-04-15 03:56:59,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 442 states. [2021-04-15 03:56:59,927 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.6666666666666665) internal successors, (168), 62 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-04-15 03:56:59,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:56:59,931 INFO L225 Difference]: With dead ends: 4672 [2021-04-15 03:56:59,931 INFO L226 Difference]: Without dead ends: 4668 [2021-04-15 03:56:59,941 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 499 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122921 ImplicationChecksByTransitivity, 82543.9ms TimeCoverageRelationStatistics Valid=59132, Invalid=191368, Unknown=0, NotChecked=0, Total=250500 [2021-04-15 03:56:59,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4668 states. [2021-04-15 03:56:59,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4668 to 373. [2021-04-15 03:56:59,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 2.077956989247312) internal successors, (773), 372 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:59,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 773 transitions. [2021-04-15 03:56:59,962 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 773 transitions. Word has length 89 [2021-04-15 03:56:59,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:56:59,962 INFO L480 AbstractCegarLoop]: Abstraction has 373 states and 773 transitions. [2021-04-15 03:56:59,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.6666666666666665) internal successors, (168), 62 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:59,963 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 773 transitions. [2021-04-15 03:56:59,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-04-15 03:56:59,963 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:56:59,963 INFO L551 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:57:00,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:57:00,184 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:57:00,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:57:00,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1618955975, now seen corresponding path program 55 times [2021-04-15 03:57:00,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:57:00,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492590173] [2021-04-15 03:57:00,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:57:00,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:57:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:57:01,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492590173] [2021-04-15 03:57:01,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383427921] [2021-04-15 03:57:01,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:57:01,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:57:01,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 79 conjunts are in the unsatisfiable core [2021-04-15 03:57:01,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:57:02,684 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:57:02,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:57:02,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-04-15 03:57:02,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905644280] [2021-04-15 03:57:02,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 03:57:02,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:57:02,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 03:57:02,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-04-15 03:57:02,686 INFO L87 Difference]: Start difference. First operand 373 states and 773 transitions. Second operand has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:57:06,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:57:06,069 INFO L93 Difference]: Finished difference Result 1166 states and 2299 transitions. [2021-04-15 03:57:06,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 03:57:06,074 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-04-15 03:57:06,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:57:06,075 INFO L225 Difference]: With dead ends: 1166 [2021-04-15 03:57:06,075 INFO L226 Difference]: Without dead ends: 1037 [2021-04-15 03:57:06,076 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1430.1ms TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-04-15 03:57:06,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-04-15 03:57:06,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 786. [2021-04-15 03:57:06,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 2.156687898089172) internal successors, (1693), 785 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:57:06,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1693 transitions. [2021-04-15 03:57:06,083 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1693 transitions. Word has length 91 [2021-04-15 03:57:06,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:57:06,083 INFO L480 AbstractCegarLoop]: Abstraction has 786 states and 1693 transitions. [2021-04-15 03:57:06,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:57:06,083 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1693 transitions. [2021-04-15 03:57:06,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-04-15 03:57:06,084 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:57:06,084 INFO L551 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:57:06,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-04-15 03:57:06,285 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:57:06,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:57:06,285 INFO L82 PathProgramCache]: Analyzing trace with hash -627432901, now seen corresponding path program 56 times [2021-04-15 03:57:06,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:57:06,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513681594] [2021-04-15 03:57:06,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:57:06,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:57:09,379 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:57:09,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513681594] [2021-04-15 03:57:09,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161734308] [2021-04-15 03:57:09,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:57:09,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:57:09,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:57:09,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 03:57:09,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:57:17,059 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:57:17,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:57:17,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 85 [2021-04-15 03:57:17,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586388045] [2021-04-15 03:57:17,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-04-15 03:57:17,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:57:17,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-04-15 03:57:17,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1241, Invalid=6069, Unknown=0, NotChecked=0, Total=7310 [2021-04-15 03:57:17,062 INFO L87 Difference]: Start difference. First operand 786 states and 1693 transitions. Second operand has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 85 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:58:55,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:58:55,599 INFO L93 Difference]: Finished difference Result 7522 states and 14870 transitions. [2021-04-15 03:58:55,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 484 states. [2021-04-15 03:58:55,603 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 85 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-04-15 03:58:55,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:58:55,608 INFO L225 Difference]: With dead ends: 7522 [2021-04-15 03:58:55,609 INFO L226 Difference]: Without dead ends: 6064 [2021-04-15 03:58:55,620 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 564 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152699 ImplicationChecksByTransitivity, 88839.0ms TimeCoverageRelationStatistics Valid=89669, Invalid=230121, Unknown=0, NotChecked=0, Total=319790 [2021-04-15 03:58:55,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6064 states. [2021-04-15 03:58:55,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6064 to 467. [2021-04-15 03:58:55,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 2.0643776824034337) internal successors, (962), 466 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:58:55,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 962 transitions. [2021-04-15 03:58:55,643 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 962 transitions. Word has length 93 [2021-04-15 03:58:55,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:58:55,643 INFO L480 AbstractCegarLoop]: Abstraction has 467 states and 962 transitions. [2021-04-15 03:58:55,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 85 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:58:55,643 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 962 transitions. [2021-04-15 03:58:55,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-04-15 03:58:55,644 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:58:55,644 INFO L551 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:58:55,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:58:55,861 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:58:55,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:58:55,861 INFO L82 PathProgramCache]: Analyzing trace with hash 700547629, now seen corresponding path program 57 times [2021-04-15 03:58:55,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:58:55,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138824582] [2021-04-15 03:58:55,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:58:55,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:58:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:58:57,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138824582] [2021-04-15 03:58:57,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422435246] [2021-04-15 03:58:57,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:58:57,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-04-15 03:58:57,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:58:57,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 03:58:57,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:59:03,827 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:59:03,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:59:03,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 43] total 65 [2021-04-15 03:59:03,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559925507] [2021-04-15 03:59:03,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-04-15 03:59:03,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:59:03,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-04-15 03:59:03,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=821, Invalid=3469, Unknown=0, NotChecked=0, Total=4290 [2021-04-15 03:59:03,828 INFO L87 Difference]: Start difference. First operand 467 states and 962 transitions. Second operand has 66 states, 66 states have (on average 2.6666666666666665) internal successors, (176), 65 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-04-15 04:00:23,266 WARN L222 SmtUtils]: Removed 3 from assertion stack [2021-04-15 04:00:23,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 471 states. [2021-04-15 04:00:23,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-04-15 04:00:23,468 WARN L545 AbstractCegarLoop]: Verification canceled [2021-04-15 04:00:23,472 WARN L224 ceAbstractionStarter]: Timeout [2021-04-15 04:00:23,472 INFO L202 PluginConnector]: Adding new model figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 04:00:23 BasicIcfg [2021-04-15 04:00:23,472 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 04:00:23,473 INFO L168 Benchmark]: Toolchain (without parser) took 800436.81 ms. Allocated memory was 341.8 MB in the beginning and 859.8 MB in the end (delta: 518.0 MB). Free memory was 322.0 MB in the beginning and 507.8 MB in the end (delta: -185.8 MB). Peak memory consumption was 334.7 MB. Max. memory is 16.0 GB. [2021-04-15 04:00:23,473 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 341.8 MB. Free memory was 323.1 MB in the beginning and 323.0 MB in the end (delta: 76.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 04:00:23,473 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.76 ms. Allocated memory is still 341.8 MB. Free memory was 321.9 MB in the beginning and 320.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 04:00:23,474 INFO L168 Benchmark]: Boogie Preprocessor took 11.53 ms. Allocated memory is still 341.8 MB. Free memory was 320.5 MB in the beginning and 319.6 MB in the end (delta: 918.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 04:00:23,474 INFO L168 Benchmark]: RCFGBuilder took 300.16 ms. Allocated memory is still 341.8 MB. Free memory was 319.5 MB in the beginning and 307.8 MB in the end (delta: 11.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-04-15 04:00:23,474 INFO L168 Benchmark]: TraceAbstraction took 800093.96 ms. Allocated memory was 341.8 MB in the beginning and 859.8 MB in the end (delta: 518.0 MB). Free memory was 307.3 MB in the beginning and 507.8 MB in the end (delta: -200.5 MB). Peak memory consumption was 320.0 MB. Max. memory is 16.0 GB. [2021-04-15 04:00:23,474 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 341.8 MB. Free memory was 323.1 MB in the beginning and 323.0 MB in the end (delta: 76.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.76 ms. Allocated memory is still 341.8 MB. Free memory was 321.9 MB in the beginning and 320.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.53 ms. Allocated memory is still 341.8 MB. Free memory was 320.5 MB in the beginning and 319.6 MB in the end (delta: 918.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 300.16 ms. Allocated memory is still 341.8 MB. Free memory was 319.5 MB in the beginning and 307.8 MB in the end (delta: 11.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 800093.96 ms. Allocated memory was 341.8 MB in the beginning and 859.8 MB in the end (delta: 518.0 MB). Free memory was 307.3 MB in the beginning and 507.8 MB in the end (delta: -200.5 MB). Peak memory consumption was 320.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 52). Cancelled while BasicCegarLoop was constructing difference of abstraction (467states) and FLOYD_HOARE automaton (currently 471 states, 66 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 13 for 25ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 800023.3ms, OverallIterations: 60, TraceHistogramMax: 20, EmptinessCheckTime: 57.7ms, AutomataDifference: 693401.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4342 SDtfs, 30808 SDslu, 65567 SDs, 0 SdLazy, 70669 SolverSat, 3929 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 39610.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12014 GetRequests, 2715 SyntacticMatches, 38 SemanticMatches, 9260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1446741 ImplicationChecksByTransitivity, 641692.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=786occurred in iteration=58, InterpolantAutomatonStates: 7361, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 634.1ms AutomataMinimizationTime, 59 MinimizatonAttempts, 76632 StatesRemovedByMinimization, 59 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 318.1ms SsaConstructionTime, 1466.7ms SatisfiabilityAnalysisTime, 90456.3ms InterpolantComputationTime, 6488 NumberOfCodeBlocks, 6488 NumberOfCodeBlocksAsserted, 473 NumberOfCheckSat, 6370 ConstructedInterpolants, 0 QuantifiedInterpolants, 51240 SizeOfPredicates, 175 NumberOfNonLiveVariables, 8147 ConjunctsInSsa, 1772 ConjunctsInUnsatCore, 118 InterpolantComputations, 2 PerfectInterpolantSequences, 10299/31239 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown