/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 22:15:57,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 22:15:57,642 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 22:15:57,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 22:15:57,714 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 [2021-06-12 22:15:57,756 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 22:15:57,756 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 22:15:57,756 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 22:15:57,756 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 22:15:57,758 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 22:15:57,758 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 22:15:57,758 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 22:15:57,759 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 22:15:57,759 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 22:15:57,759 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 22:15:57,760 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 22:15:57,760 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 22:15:57,760 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 22:15:57,760 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 22:15:57,760 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 22:15:57,760 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 22:15:57,760 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 22:15:57,760 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 22:15:57,761 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 22:15:57,761 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 22:15:57,761 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 22:15:57,761 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 22:15:57,761 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 22:15:57,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 22:15:57,761 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 22:15:57,761 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 22:15:57,762 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 22:15:57,762 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 22:15:57,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 22:15:57,762 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 22:15:57,762 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 22:15:57,762 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 22:15:58,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 22:15:58,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 22:15:58,061 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 22:15:58,062 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 22:15:58,063 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 22:15:58,063 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl [2021-06-12 22:15:58,063 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/nonblocking-counter-alt2.wvr.bpl' [2021-06-12 22:15:58,089 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 22:15:58,091 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 22:15:58,093 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 22:15:58,093 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 22:15:58,093 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 22:15:58,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:15:58" (1/1) ... [2021-06-12 22:15:58,106 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:15:58" (1/1) ... [2021-06-12 22:15:58,111 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 22:15:58,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 22:15:58,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 22:15:58,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 22:15:58,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:15:58" (1/1) ... [2021-06-12 22:15:58,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:15:58" (1/1) ... [2021-06-12 22:15:58,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:15:58" (1/1) ... [2021-06-12 22:15:58,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:15:58" (1/1) ... [2021-06-12 22:15:58,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:15:58" (1/1) ... [2021-06-12 22:15:58,124 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:15:58" (1/1) ... [2021-06-12 22:15:58,124 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:15:58" (1/1) ... [2021-06-12 22:15:58,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 22:15:58,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 22:15:58,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 22:15:58,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 22:15:58,128 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:15:58" (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 [2021-06-12 22:15:58,171 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 22:15:58,171 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 22:15:58,171 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 22:15:58,172 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 22:15:58,172 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 22:15:58,172 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 22:15:58,172 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 22:15:58,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 22:15:58,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 22:15:58,173 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 22:15:58,289 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 22:15:58,289 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 22:15:58,291 INFO L202 PluginConnector]: Adding new model nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 10:15:58 BoogieIcfgContainer [2021-06-12 22:15:58,291 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 22:15:58,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 22:15:58,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 22:15:58,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 22:15:58,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:15:58" (1/2) ... [2021-06-12 22:15:58,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a68a575 and model type nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 10:15:58, skipping insertion in model container [2021-06-12 22:15:58,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 10:15:58" (2/2) ... [2021-06-12 22:15:58,295 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-counter-alt2.wvr.bpl [2021-06-12 22:15:58,299 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 22:15:58,299 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 22:15:58,299 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 22:15:58,299 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 22:15:58,319 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-12 22:15:58,332 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 22:15:58,361 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 22:15:58,361 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 22:15:58,361 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 22:15:58,361 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 22:15:58,361 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 22:15:58,361 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 22:15:58,361 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 22:15:58,361 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 22:15:58,367 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-06-12 22:15:58,387 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) [2021-06-12 22:15:58,389 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) [2021-06-12 22:15:58,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 22:15:58,393 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:58,394 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:15:58,394 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:58,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:58,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1715863245, now seen corresponding path program 1 times [2021-06-12 22:15:58,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:58,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003721986] [2021-06-12 22:15:58,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:58,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:58,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:58,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003721986] [2021-06-12 22:15:58,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003721986] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:15:58,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:15:58,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 22:15:58,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304456569] [2021-06-12 22:15:58,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 22:15:58,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:58,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 22:15:58,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 22:15:58,558 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:58,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:58,629 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2021-06-12 22:15:58,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 22:15:58,631 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 22:15:58,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:58,637 INFO L225 Difference]: With dead ends: 43 [2021-06-12 22:15:58,637 INFO L226 Difference]: Without dead ends: 43 [2021-06-12 22:15:58,639 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:15:58,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-06-12 22:15:58,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-06-12 22:15:58,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:58,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2021-06-12 22:15:58,670 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2021-06-12 22:15:58,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:58,671 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2021-06-12 22:15:58,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:58,671 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2021-06-12 22:15:58,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 22:15:58,672 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:58,673 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:15:58,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 22:15:58,673 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:58,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:58,677 INFO L82 PathProgramCache]: Analyzing trace with hash -599854287, now seen corresponding path program 1 times [2021-06-12 22:15:58,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:58,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737069264] [2021-06-12 22:15:58,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:58,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:58,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:15:58,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:58,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737069264] [2021-06-12 22:15:58,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737069264] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:15:58,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:15:58,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 22:15:58,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494073179] [2021-06-12 22:15:58,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:15:58,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:58,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:15:58,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:15:58,760 INFO L87 Difference]: Start difference. First operand 38 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:58,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:58,792 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2021-06-12 22:15:58,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 22:15:58,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 22:15:58,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:58,797 INFO L225 Difference]: With dead ends: 50 [2021-06-12 22:15:58,797 INFO L226 Difference]: Without dead ends: 50 [2021-06-12 22:15:58,798 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:15:58,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-06-12 22:15:58,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-06-12 22:15:58,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:58,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2021-06-12 22:15:58,811 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2021-06-12 22:15:58,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:58,811 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2021-06-12 22:15:58,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:58,811 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2021-06-12 22:15:58,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:15:58,812 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:58,812 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:15:58,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 22:15:58,813 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:58,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:58,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1329802641, now seen corresponding path program 1 times [2021-06-12 22:15:58,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:58,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622030028] [2021-06-12 22:15:58,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:58,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:58,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:58,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:58,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622030028] [2021-06-12 22:15:58,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622030028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:58,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873004214] [2021-06-12 22:15:58,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:58,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:58,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:15:58,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:59,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:59,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873004214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:59,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:59,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:15:59,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856350472] [2021-06-12 22:15:59,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:15:59,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:59,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:15:59,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:15:59,211 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:59,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:59,335 INFO L93 Difference]: Finished difference Result 144 states and 274 transitions. [2021-06-12 22:15:59,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 22:15:59,336 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:15:59,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:59,339 INFO L225 Difference]: With dead ends: 144 [2021-06-12 22:15:59,342 INFO L226 Difference]: Without dead ends: 113 [2021-06-12 22:15:59,343 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 121.6ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:15:59,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-12 22:15:59,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 55. [2021-06-12 22:15:59,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:59,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 103 transitions. [2021-06-12 22:15:59,373 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 103 transitions. Word has length 19 [2021-06-12 22:15:59,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:59,373 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 103 transitions. [2021-06-12 22:15:59,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:59,374 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 103 transitions. [2021-06-12 22:15:59,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 22:15:59,374 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:59,374 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:15:59,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-12 22:15:59,575 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:59,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:59,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1564465709, now seen corresponding path program 2 times [2021-06-12 22:15:59,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:59,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264491382] [2021-06-12 22:15:59,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:59,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:59,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:59,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:59,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264491382] [2021-06-12 22:15:59,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264491382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:59,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787936682] [2021-06-12 22:15:59,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:15:59,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:15:59,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:59,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:15:59,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:59,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787936682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:59,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:59,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-12 22:15:59,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231851835] [2021-06-12 22:15:59,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:15:59,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:59,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:15:59,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:15:59,805 INFO L87 Difference]: Start difference. First operand 55 states and 103 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:00,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:00,046 INFO L93 Difference]: Finished difference Result 167 states and 307 transitions. [2021-06-12 22:16:00,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:16:00,049 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 22:16:00,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:00,049 INFO L225 Difference]: With dead ends: 167 [2021-06-12 22:16:00,049 INFO L226 Difference]: Without dead ends: 167 [2021-06-12 22:16:00,050 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 226.2ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-06-12 22:16:00,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-12 22:16:00,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 75. [2021-06-12 22:16:00,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:00,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 149 transitions. [2021-06-12 22:16:00,055 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 149 transitions. Word has length 21 [2021-06-12 22:16:00,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:00,055 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 149 transitions. [2021-06-12 22:16:00,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:00,055 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 149 transitions. [2021-06-12 22:16:00,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 22:16:00,055 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:00,056 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:00,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:00,271 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:00,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:00,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1814278047, now seen corresponding path program 3 times [2021-06-12 22:16:00,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:00,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726343127] [2021-06-12 22:16:00,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:00,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:00,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:00,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:00,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726343127] [2021-06-12 22:16:00,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726343127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:00,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392100878] [2021-06-12 22:16:00,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:16:00,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:16:00,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:00,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:16:00,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:00,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:00,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392100878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:00,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:00,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-12 22:16:00,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709512208] [2021-06-12 22:16:00,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:16:00,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:00,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:16:00,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:16:00,496 INFO L87 Difference]: Start difference. First operand 75 states and 149 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:00,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:00,752 INFO L93 Difference]: Finished difference Result 141 states and 267 transitions. [2021-06-12 22:16:00,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:16:00,752 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 22:16:00,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:00,754 INFO L225 Difference]: With dead ends: 141 [2021-06-12 22:16:00,754 INFO L226 Difference]: Without dead ends: 139 [2021-06-12 22:16:00,754 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 220.2ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:16:00,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-06-12 22:16:00,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 77. [2021-06-12 22:16:00,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.986842105263158) internal successors, (151), 76 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:00,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 151 transitions. [2021-06-12 22:16:00,770 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 151 transitions. Word has length 21 [2021-06-12 22:16:00,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:00,770 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 151 transitions. [2021-06-12 22:16:00,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:00,771 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 151 transitions. [2021-06-12 22:16:00,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:16:00,775 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:00,775 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:00,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-12 22:16:00,989 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:00,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:00,989 INFO L82 PathProgramCache]: Analyzing trace with hash -709724757, now seen corresponding path program 4 times [2021-06-12 22:16:00,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:00,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467247928] [2021-06-12 22:16:00,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:00,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:01,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:01,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:01,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467247928] [2021-06-12 22:16:01,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467247928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:01,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596188754] [2021-06-12 22:16:01,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:01,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:16:01,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:01,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:16:01,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:01,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:01,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596188754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:01,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:01,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-12 22:16:01,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804131167] [2021-06-12 22:16:01,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:16:01,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:01,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:16:01,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:16:01,509 INFO L87 Difference]: Start difference. First operand 77 states and 151 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:01,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:01,996 INFO L93 Difference]: Finished difference Result 350 states and 689 transitions. [2021-06-12 22:16:02,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:16:02,001 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 22:16:02,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:02,003 INFO L225 Difference]: With dead ends: 350 [2021-06-12 22:16:02,003 INFO L226 Difference]: Without dead ends: 293 [2021-06-12 22:16:02,004 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 521.3ms TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:16:02,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-06-12 22:16:02,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 93. [2021-06-12 22:16:02,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.010869565217391) internal successors, (185), 92 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:02,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 185 transitions. [2021-06-12 22:16:02,016 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 185 transitions. Word has length 23 [2021-06-12 22:16:02,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:02,017 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 185 transitions. [2021-06-12 22:16:02,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:02,017 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 185 transitions. [2021-06-12 22:16:02,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:16:02,021 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:02,021 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:02,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:02,222 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:02,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:02,222 INFO L82 PathProgramCache]: Analyzing trace with hash -923989763, now seen corresponding path program 5 times [2021-06-12 22:16:02,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:02,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255630163] [2021-06-12 22:16:02,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:02,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:02,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:02,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:02,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255630163] [2021-06-12 22:16:02,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255630163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:02,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938091286] [2021-06-12 22:16:02,345 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 22:16:02,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:16:02,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:02,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:16:02,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:02,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938091286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:02,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:02,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-12 22:16:02,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032778020] [2021-06-12 22:16:02,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:16:02,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:02,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:16:02,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:16:02,680 INFO L87 Difference]: Start difference. First operand 93 states and 185 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:03,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:03,301 INFO L93 Difference]: Finished difference Result 326 states and 652 transitions. [2021-06-12 22:16:03,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:16:03,301 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 22:16:03,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:03,304 INFO L225 Difference]: With dead ends: 326 [2021-06-12 22:16:03,304 INFO L226 Difference]: Without dead ends: 286 [2021-06-12 22:16:03,305 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 608.7ms TimeCoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:16:03,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-12 22:16:03,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 120. [2021-06-12 22:16:03,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0672268907563027) internal successors, (246), 119 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:03,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 246 transitions. [2021-06-12 22:16:03,314 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 246 transitions. Word has length 23 [2021-06-12 22:16:03,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:03,314 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 246 transitions. [2021-06-12 22:16:03,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:03,314 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 246 transitions. [2021-06-12 22:16:03,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:16:03,316 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:03,316 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:03,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-12 22:16:03,529 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:03,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:03,529 INFO L82 PathProgramCache]: Analyzing trace with hash 656818999, now seen corresponding path program 6 times [2021-06-12 22:16:03,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:03,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087753679] [2021-06-12 22:16:03,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:03,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:03,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:03,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:03,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087753679] [2021-06-12 22:16:03,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087753679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:03,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193676324] [2021-06-12 22:16:03,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:03,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:16:03,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:03,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:16:03,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:03,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:03,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193676324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:03,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:03,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-12 22:16:03,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631416331] [2021-06-12 22:16:03,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:16:03,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:03,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:16:03,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:16:03,976 INFO L87 Difference]: Start difference. First operand 120 states and 246 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:05,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:05,090 INFO L93 Difference]: Finished difference Result 387 states and 768 transitions. [2021-06-12 22:16:05,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:16:05,093 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 22:16:05,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:05,095 INFO L225 Difference]: With dead ends: 387 [2021-06-12 22:16:05,095 INFO L226 Difference]: Without dead ends: 341 [2021-06-12 22:16:05,095 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1047.1ms TimeCoverageRelationStatistics Valid=361, Invalid=1619, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 22:16:05,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-06-12 22:16:05,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 124. [2021-06-12 22:16:05,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.073170731707317) internal successors, (255), 123 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:05,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 255 transitions. [2021-06-12 22:16:05,099 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 255 transitions. Word has length 23 [2021-06-12 22:16:05,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:05,099 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 255 transitions. [2021-06-12 22:16:05,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:05,099 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 255 transitions. [2021-06-12 22:16:05,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:16:05,100 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:05,100 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:05,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:05,305 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:05,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:05,305 INFO L82 PathProgramCache]: Analyzing trace with hash -73546911, now seen corresponding path program 7 times [2021-06-12 22:16:05,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:05,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378769246] [2021-06-12 22:16:05,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:05,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:05,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:05,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:05,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378769246] [2021-06-12 22:16:05,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378769246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:05,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016842127] [2021-06-12 22:16:05,363 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:05,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:05,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:16:05,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:05,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:16:05,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016842127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:05,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:05,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 22:16:05,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216703283] [2021-06-12 22:16:05,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:16:05,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:05,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:16:05,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:16:05,547 INFO L87 Difference]: Start difference. First operand 124 states and 255 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:05,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:05,987 INFO L93 Difference]: Finished difference Result 302 states and 585 transitions. [2021-06-12 22:16:05,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:16:05,987 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 22:16:05,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:05,989 INFO L225 Difference]: With dead ends: 302 [2021-06-12 22:16:05,989 INFO L226 Difference]: Without dead ends: 294 [2021-06-12 22:16:05,989 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 390.3ms TimeCoverageRelationStatistics Valid=301, Invalid=1031, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:16:05,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-06-12 22:16:05,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 161. [2021-06-12 22:16:05,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.2) internal successors, (352), 160 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:05,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 352 transitions. [2021-06-12 22:16:05,993 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 352 transitions. Word has length 23 [2021-06-12 22:16:05,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:05,994 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 352 transitions. [2021-06-12 22:16:05,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:05,994 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 352 transitions. [2021-06-12 22:16:05,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:16:05,994 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:05,994 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:06,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-12 22:16:06,197 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:06,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:06,197 INFO L82 PathProgramCache]: Analyzing trace with hash -170955159, now seen corresponding path program 8 times [2021-06-12 22:16:06,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:06,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139025607] [2021-06-12 22:16:06,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:06,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:06,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:06,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139025607] [2021-06-12 22:16:06,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139025607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:06,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566620263] [2021-06-12 22:16:06,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:06,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:16:06,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:06,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:16:06,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:06,424 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:06,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566620263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:06,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:06,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 22:16:06,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759081283] [2021-06-12 22:16:06,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:16:06,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:06,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:16:06,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:16:06,425 INFO L87 Difference]: Start difference. First operand 161 states and 352 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:06,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:06,819 INFO L93 Difference]: Finished difference Result 404 states and 806 transitions. [2021-06-12 22:16:06,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:16:06,824 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 22:16:06,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:06,826 INFO L225 Difference]: With dead ends: 404 [2021-06-12 22:16:06,826 INFO L226 Difference]: Without dead ends: 404 [2021-06-12 22:16:06,826 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 368.4ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:16:06,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-06-12 22:16:06,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 175. [2021-06-12 22:16:06,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.2011494252873565) internal successors, (383), 174 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:06,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 383 transitions. [2021-06-12 22:16:06,837 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 383 transitions. Word has length 25 [2021-06-12 22:16:06,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:06,837 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 383 transitions. [2021-06-12 22:16:06,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:06,837 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 383 transitions. [2021-06-12 22:16:06,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:16:06,838 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:06,838 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:07,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-12 22:16:07,041 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:07,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:07,042 INFO L82 PathProgramCache]: Analyzing trace with hash 465222687, now seen corresponding path program 9 times [2021-06-12 22:16:07,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:07,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927110268] [2021-06-12 22:16:07,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:07,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:07,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:07,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927110268] [2021-06-12 22:16:07,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927110268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:07,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317676885] [2021-06-12 22:16:07,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:16:07,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:16:07,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:07,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:07,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:07,259 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:07,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317676885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:07,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:07,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-06-12 22:16:07,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977818912] [2021-06-12 22:16:07,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:16:07,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:07,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:16:07,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:16:07,260 INFO L87 Difference]: Start difference. First operand 175 states and 383 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:07,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:07,786 INFO L93 Difference]: Finished difference Result 308 states and 630 transitions. [2021-06-12 22:16:07,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:16:07,791 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 22:16:07,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:07,792 INFO L225 Difference]: With dead ends: 308 [2021-06-12 22:16:07,792 INFO L226 Difference]: Without dead ends: 306 [2021-06-12 22:16:07,793 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 487.6ms TimeCoverageRelationStatistics Valid=493, Invalid=1399, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 22:16:07,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-06-12 22:16:07,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 175. [2021-06-12 22:16:07,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1954022988505746) internal successors, (382), 174 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:07,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 382 transitions. [2021-06-12 22:16:07,797 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 382 transitions. Word has length 25 [2021-06-12 22:16:07,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:07,797 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 382 transitions. [2021-06-12 22:16:07,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:07,797 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 382 transitions. [2021-06-12 22:16:07,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 22:16:07,798 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:07,798 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:08,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:08,007 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:08,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:08,007 INFO L82 PathProgramCache]: Analyzing trace with hash -2001868057, now seen corresponding path program 10 times [2021-06-12 22:16:08,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:08,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184310357] [2021-06-12 22:16:08,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:08,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:08,160 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:08,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:08,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184310357] [2021-06-12 22:16:08,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184310357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:08,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699045403] [2021-06-12 22:16:08,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:08,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:16:08,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:08,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:16:08,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:08,619 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:08,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699045403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:08,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:08,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 22:16:08,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613897062] [2021-06-12 22:16:08,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 22:16:08,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:08,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 22:16:08,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:16:08,621 INFO L87 Difference]: Start difference. First operand 175 states and 382 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:09,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:09,460 INFO L93 Difference]: Finished difference Result 609 states and 1253 transitions. [2021-06-12 22:16:09,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:16:09,461 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 22:16:09,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:09,462 INFO L225 Difference]: With dead ends: 609 [2021-06-12 22:16:09,462 INFO L226 Difference]: Without dead ends: 543 [2021-06-12 22:16:09,463 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 862.6ms TimeCoverageRelationStatistics Valid=364, Invalid=1892, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 22:16:09,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-12 22:16:09,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 229. [2021-06-12 22:16:09,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.219298245614035) internal successors, (506), 228 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:09,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 506 transitions. [2021-06-12 22:16:09,469 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 506 transitions. Word has length 27 [2021-06-12 22:16:09,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:09,469 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 506 transitions. [2021-06-12 22:16:09,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:09,469 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 506 transitions. [2021-06-12 22:16:09,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 22:16:09,470 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:09,470 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:09,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-12 22:16:09,683 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:09,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:09,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1752108615, now seen corresponding path program 11 times [2021-06-12 22:16:09,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:09,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110228962] [2021-06-12 22:16:09,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:09,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:09,934 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:09,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:09,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110228962] [2021-06-12 22:16:09,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110228962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:09,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865917519] [2021-06-12 22:16:09,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:09,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:16:09,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:09,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:16:09,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:10,373 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:10,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865917519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:10,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:10,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 22:16:10,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419170137] [2021-06-12 22:16:10,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 22:16:10,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:10,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 22:16:10,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:16:10,374 INFO L87 Difference]: Start difference. First operand 229 states and 506 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:11,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:11,230 INFO L93 Difference]: Finished difference Result 588 states and 1219 transitions. [2021-06-12 22:16:11,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:16:11,230 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 22:16:11,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:11,232 INFO L225 Difference]: With dead ends: 588 [2021-06-12 22:16:11,232 INFO L226 Difference]: Without dead ends: 534 [2021-06-12 22:16:11,232 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 903.2ms TimeCoverageRelationStatistics Valid=348, Invalid=1908, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 22:16:11,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-12 22:16:11,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 248. [2021-06-12 22:16:11,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.210526315789474) internal successors, (546), 247 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:11,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 546 transitions. [2021-06-12 22:16:11,238 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 546 transitions. Word has length 27 [2021-06-12 22:16:11,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:11,238 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 546 transitions. [2021-06-12 22:16:11,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:11,238 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 546 transitions. [2021-06-12 22:16:11,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 22:16:11,239 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:11,239 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:11,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-12 22:16:11,453 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:11,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:11,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1644513465, now seen corresponding path program 12 times [2021-06-12 22:16:11,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:11,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976563419] [2021-06-12 22:16:11,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:11,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:11,626 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:11,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:11,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976563419] [2021-06-12 22:16:11,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976563419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:11,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736565724] [2021-06-12 22:16:11,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:11,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:16:11,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:11,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:16:11,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:12,055 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:12,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736565724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:12,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:12,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 22:16:12,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066645849] [2021-06-12 22:16:12,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 22:16:12,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:12,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 22:16:12,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:16:12,057 INFO L87 Difference]: Start difference. First operand 248 states and 546 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:13,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:13,037 INFO L93 Difference]: Finished difference Result 592 states and 1236 transitions. [2021-06-12 22:16:13,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 22:16:13,037 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 22:16:13,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:13,039 INFO L225 Difference]: With dead ends: 592 [2021-06-12 22:16:13,039 INFO L226 Difference]: Without dead ends: 559 [2021-06-12 22:16:13,039 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 946.7ms TimeCoverageRelationStatistics Valid=425, Invalid=2125, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:16:13,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-06-12 22:16:13,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 272. [2021-06-12 22:16:13,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.206642066420664) internal successors, (598), 271 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:13,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 598 transitions. [2021-06-12 22:16:13,046 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 598 transitions. Word has length 27 [2021-06-12 22:16:13,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:13,046 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 598 transitions. [2021-06-12 22:16:13,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:13,046 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 598 transitions. [2021-06-12 22:16:13,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 22:16:13,046 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:13,046 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:13,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:13,261 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:13,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:13,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1281656179, now seen corresponding path program 13 times [2021-06-12 22:16:13,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:13,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670012577] [2021-06-12 22:16:13,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:13,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:13,448 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:13,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:13,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670012577] [2021-06-12 22:16:13,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670012577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:13,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007088675] [2021-06-12 22:16:13,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:13,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:13,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:16:13,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:13,852 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:13,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007088675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:13,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:13,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 22:16:13,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434270033] [2021-06-12 22:16:13,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 22:16:13,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:13,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 22:16:13,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:16:13,854 INFO L87 Difference]: Start difference. First operand 272 states and 598 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:15,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:15,099 INFO L93 Difference]: Finished difference Result 679 states and 1420 transitions. [2021-06-12 22:16:15,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:16:15,100 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 22:16:15,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:15,103 INFO L225 Difference]: With dead ends: 679 [2021-06-12 22:16:15,103 INFO L226 Difference]: Without dead ends: 616 [2021-06-12 22:16:15,104 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 1263.0ms TimeCoverageRelationStatistics Valid=435, Invalid=2427, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 22:16:15,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-06-12 22:16:15,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 280. [2021-06-12 22:16:15,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.2007168458781363) internal successors, (614), 279 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:15,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 614 transitions. [2021-06-12 22:16:15,109 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 614 transitions. Word has length 27 [2021-06-12 22:16:15,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:15,110 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 614 transitions. [2021-06-12 22:16:15,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:15,110 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 614 transitions. [2021-06-12 22:16:15,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 22:16:15,110 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:15,110 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:15,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-12 22:16:15,318 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:15,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:15,318 INFO L82 PathProgramCache]: Analyzing trace with hash 383310963, now seen corresponding path program 14 times [2021-06-12 22:16:15,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:15,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247877085] [2021-06-12 22:16:15,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:15,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:15,470 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:15,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:15,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247877085] [2021-06-12 22:16:15,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247877085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:15,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037688886] [2021-06-12 22:16:15,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:15,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:16:15,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:15,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:16:15,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:15,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037688886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:15,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:15,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 22:16:15,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617482744] [2021-06-12 22:16:15,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 22:16:15,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:15,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 22:16:15,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:16:15,862 INFO L87 Difference]: Start difference. First operand 280 states and 614 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:17,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:17,514 INFO L93 Difference]: Finished difference Result 744 states and 1546 transitions. [2021-06-12 22:16:17,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 22:16:17,514 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 22:16:17,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:17,516 INFO L225 Difference]: With dead ends: 744 [2021-06-12 22:16:17,516 INFO L226 Difference]: Without dead ends: 704 [2021-06-12 22:16:17,517 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 1575.4ms TimeCoverageRelationStatistics Valid=710, Invalid=3322, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 22:16:17,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-06-12 22:16:17,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 291. [2021-06-12 22:16:17,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.2103448275862068) internal successors, (641), 290 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:17,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 641 transitions. [2021-06-12 22:16:17,524 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 641 transitions. Word has length 27 [2021-06-12 22:16:17,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:17,524 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 641 transitions. [2021-06-12 22:16:17,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:17,524 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 641 transitions. [2021-06-12 22:16:17,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 22:16:17,524 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:17,524 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:17,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:17,741 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:17,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:17,741 INFO L82 PathProgramCache]: Analyzing trace with hash 113919671, now seen corresponding path program 15 times [2021-06-12 22:16:17,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:17,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52242561] [2021-06-12 22:16:17,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:17,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:17,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:17,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52242561] [2021-06-12 22:16:17,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52242561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:17,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971274329] [2021-06-12 22:16:17,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:17,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:16:17,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:17,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 22:16:17,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:18,119 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:18,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971274329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:18,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:18,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-12 22:16:18,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362698933] [2021-06-12 22:16:18,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:16:18,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:18,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:16:18,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:16:18,120 INFO L87 Difference]: Start difference. First operand 291 states and 641 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:18,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:18,899 INFO L93 Difference]: Finished difference Result 662 states and 1432 transitions. [2021-06-12 22:16:18,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:16:18,900 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 22:16:18,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:18,901 INFO L225 Difference]: With dead ends: 662 [2021-06-12 22:16:18,901 INFO L226 Difference]: Without dead ends: 662 [2021-06-12 22:16:18,902 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 776.4ms TimeCoverageRelationStatistics Valid=438, Invalid=1632, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:16:18,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-06-12 22:16:18,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 340. [2021-06-12 22:16:18,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.2359882005899707) internal successors, (758), 339 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:18,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 758 transitions. [2021-06-12 22:16:18,908 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 758 transitions. Word has length 27 [2021-06-12 22:16:18,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:18,908 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 758 transitions. [2021-06-12 22:16:18,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:18,909 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 758 transitions. [2021-06-12 22:16:18,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 22:16:18,909 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:18,909 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:19,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:19,125 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:19,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:19,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1553365309, now seen corresponding path program 16 times [2021-06-12 22:16:19,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:19,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66874899] [2021-06-12 22:16:19,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:19,284 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:19,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:19,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66874899] [2021-06-12 22:16:19,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66874899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:19,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072421164] [2021-06-12 22:16:19,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:19,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:16:19,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:19,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:16:19,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:19,708 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:19,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072421164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:19,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:19,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 22:16:19,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018680577] [2021-06-12 22:16:19,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 22:16:19,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:19,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 22:16:19,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:16:19,710 INFO L87 Difference]: Start difference. First operand 340 states and 758 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:21,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:21,616 INFO L93 Difference]: Finished difference Result 1105 states and 2323 transitions. [2021-06-12 22:16:21,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 22:16:21,616 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 22:16:21,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:21,619 INFO L225 Difference]: With dead ends: 1105 [2021-06-12 22:16:21,619 INFO L226 Difference]: Without dead ends: 1038 [2021-06-12 22:16:21,620 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1695 ImplicationChecksByTransitivity, 1741.6ms TimeCoverageRelationStatistics Valid=688, Invalid=4424, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 22:16:21,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-06-12 22:16:21,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 406. [2021-06-12 22:16:21,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.3061728395061727) internal successors, (934), 405 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:21,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 934 transitions. [2021-06-12 22:16:21,629 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 934 transitions. Word has length 27 [2021-06-12 22:16:21,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:21,630 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 934 transitions. [2021-06-12 22:16:21,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:21,630 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 934 transitions. [2021-06-12 22:16:21,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 22:16:21,631 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:21,631 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:21,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:21,841 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:21,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:21,841 INFO L82 PathProgramCache]: Analyzing trace with hash -525801667, now seen corresponding path program 17 times [2021-06-12 22:16:21,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:21,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832134818] [2021-06-12 22:16:21,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:21,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:21,954 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:21,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:21,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832134818] [2021-06-12 22:16:21,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832134818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:21,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434752000] [2021-06-12 22:16:21,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:21,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:16:21,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:21,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:16:21,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:22,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434752000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:22,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:22,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-12 22:16:22,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878367213] [2021-06-12 22:16:22,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:16:22,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:22,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:16:22,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:16:22,217 INFO L87 Difference]: Start difference. First operand 406 states and 934 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:23,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:23,240 INFO L93 Difference]: Finished difference Result 820 states and 1742 transitions. [2021-06-12 22:16:23,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:16:23,240 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 22:16:23,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:23,242 INFO L225 Difference]: With dead ends: 820 [2021-06-12 22:16:23,242 INFO L226 Difference]: Without dead ends: 793 [2021-06-12 22:16:23,243 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 981.2ms TimeCoverageRelationStatistics Valid=547, Invalid=2003, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:16:23,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-06-12 22:16:23,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 370. [2021-06-12 22:16:23,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.2086720867208673) internal successors, (815), 369 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:23,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 815 transitions. [2021-06-12 22:16:23,250 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 815 transitions. Word has length 27 [2021-06-12 22:16:23,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:23,250 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 815 transitions. [2021-06-12 22:16:23,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:23,250 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 815 transitions. [2021-06-12 22:16:23,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 22:16:23,250 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:23,250 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:23,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-12 22:16:23,465 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:23,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:23,465 INFO L82 PathProgramCache]: Analyzing trace with hash -879273425, now seen corresponding path program 18 times [2021-06-12 22:16:23,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:23,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597307565] [2021-06-12 22:16:23,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:23,521 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:23,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:23,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597307565] [2021-06-12 22:16:23,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597307565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:23,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958625844] [2021-06-12 22:16:23,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:23,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:16:23,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:23,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:16:23,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:23,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958625844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:23,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:23,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2021-06-12 22:16:23,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695581038] [2021-06-12 22:16:23,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:16:23,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:23,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:16:23,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:16:23,733 INFO L87 Difference]: Start difference. First operand 370 states and 815 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:24,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:24,302 INFO L93 Difference]: Finished difference Result 790 states and 1683 transitions. [2021-06-12 22:16:24,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:16:24,302 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 22:16:24,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:24,304 INFO L225 Difference]: With dead ends: 790 [2021-06-12 22:16:24,304 INFO L226 Difference]: Without dead ends: 786 [2021-06-12 22:16:24,305 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 550.5ms TimeCoverageRelationStatistics Valid=534, Invalid=1818, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:16:24,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-06-12 22:16:24,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 458. [2021-06-12 22:16:24,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 2.2603938730853392) internal successors, (1033), 457 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:24,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1033 transitions. [2021-06-12 22:16:24,312 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1033 transitions. Word has length 27 [2021-06-12 22:16:24,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:24,312 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1033 transitions. [2021-06-12 22:16:24,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:24,312 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1033 transitions. [2021-06-12 22:16:24,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 22:16:24,313 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:24,313 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:24,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-12 22:16:24,530 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:24,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:24,530 INFO L82 PathProgramCache]: Analyzing trace with hash -335260507, now seen corresponding path program 19 times [2021-06-12 22:16:24,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:24,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332449486] [2021-06-12 22:16:24,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:24,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:24,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:24,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332449486] [2021-06-12 22:16:24,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332449486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:24,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397609512] [2021-06-12 22:16:24,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:16:24,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:24,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 22:16:24,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:24,838 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:24,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397609512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:24,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:24,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 22:16:24,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248387944] [2021-06-12 22:16:24,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 22:16:24,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:24,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 22:16:24,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:16:24,839 INFO L87 Difference]: Start difference. First operand 458 states and 1033 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:25,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:25,563 INFO L93 Difference]: Finished difference Result 890 states and 1856 transitions. [2021-06-12 22:16:25,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:16:25,564 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 22:16:25,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:25,566 INFO L225 Difference]: With dead ends: 890 [2021-06-12 22:16:25,566 INFO L226 Difference]: Without dead ends: 890 [2021-06-12 22:16:25,566 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 676.9ms TimeCoverageRelationStatistics Valid=775, Invalid=2417, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:16:25,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-06-12 22:16:25,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 490. [2021-06-12 22:16:25,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 2.276073619631902) internal successors, (1113), 489 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:25,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1113 transitions. [2021-06-12 22:16:25,573 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1113 transitions. Word has length 29 [2021-06-12 22:16:25,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:25,573 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1113 transitions. [2021-06-12 22:16:25,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:25,573 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1113 transitions. [2021-06-12 22:16:25,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 22:16:25,574 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:25,574 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:25,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:25,789 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:25,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:25,789 INFO L82 PathProgramCache]: Analyzing trace with hash -2063984225, now seen corresponding path program 20 times [2021-06-12 22:16:25,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:25,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022288298] [2021-06-12 22:16:25,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:25,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:25,832 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:25,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:25,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022288298] [2021-06-12 22:16:25,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022288298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:25,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907632925] [2021-06-12 22:16:25,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:25,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:16:25,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:25,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 22:16:25,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:26,051 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:26,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907632925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:26,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:26,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2021-06-12 22:16:26,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995011190] [2021-06-12 22:16:26,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:16:26,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:26,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:16:26,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:16:26,052 INFO L87 Difference]: Start difference. First operand 490 states and 1113 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:26,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:26,946 INFO L93 Difference]: Finished difference Result 726 states and 1556 transitions. [2021-06-12 22:16:26,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 22:16:26,946 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 22:16:26,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:26,948 INFO L225 Difference]: With dead ends: 726 [2021-06-12 22:16:26,948 INFO L226 Difference]: Without dead ends: 722 [2021-06-12 22:16:26,949 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 845.6ms TimeCoverageRelationStatistics Valid=1000, Invalid=3032, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 22:16:26,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-06-12 22:16:26,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 458. [2021-06-12 22:16:26,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 2.25382932166302) internal successors, (1030), 457 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:26,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1030 transitions. [2021-06-12 22:16:26,955 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1030 transitions. Word has length 29 [2021-06-12 22:16:26,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:26,955 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1030 transitions. [2021-06-12 22:16:26,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:26,956 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1030 transitions. [2021-06-12 22:16:26,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 22:16:26,956 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:26,956 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:27,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-12 22:16:27,157 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:27,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:27,157 INFO L82 PathProgramCache]: Analyzing trace with hash 2078249141, now seen corresponding path program 21 times [2021-06-12 22:16:27,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:27,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800004685] [2021-06-12 22:16:27,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:27,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:27,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800004685] [2021-06-12 22:16:27,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800004685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:27,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447287006] [2021-06-12 22:16:27,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:27,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:16:27,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:27,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 22:16:27,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:27,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447287006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:27,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:27,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-06-12 22:16:27,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676097309] [2021-06-12 22:16:27,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 22:16:27,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:27,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 22:16:27,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:16:27,657 INFO L87 Difference]: Start difference. First operand 458 states and 1030 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:29,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:29,198 INFO L93 Difference]: Finished difference Result 705 states and 1525 transitions. [2021-06-12 22:16:29,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 22:16:29,198 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 22:16:29,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:29,200 INFO L225 Difference]: With dead ends: 705 [2021-06-12 22:16:29,200 INFO L226 Difference]: Without dead ends: 684 [2021-06-12 22:16:29,201 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1528.3ms TimeCoverageRelationStatistics Valid=434, Invalid=3598, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 22:16:29,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-06-12 22:16:29,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 473. [2021-06-12 22:16:29,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.264830508474576) internal successors, (1069), 472 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:29,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1069 transitions. [2021-06-12 22:16:29,207 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1069 transitions. Word has length 29 [2021-06-12 22:16:29,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:29,207 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1069 transitions. [2021-06-12 22:16:29,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:29,207 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1069 transitions. [2021-06-12 22:16:29,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 22:16:29,208 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:29,208 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:29,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:29,425 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:29,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:29,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1384293639, now seen corresponding path program 22 times [2021-06-12 22:16:29,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:29,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373934266] [2021-06-12 22:16:29,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:29,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:29,610 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:29,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:29,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373934266] [2021-06-12 22:16:29,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373934266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:29,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768199453] [2021-06-12 22:16:29,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:29,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:16:29,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:29,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:16:29,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:30,162 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:30,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768199453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:30,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:30,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-12 22:16:30,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439030211] [2021-06-12 22:16:30,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 22:16:30,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:30,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 22:16:30,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:16:30,163 INFO L87 Difference]: Start difference. First operand 473 states and 1069 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:31,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:31,804 INFO L93 Difference]: Finished difference Result 761 states and 1640 transitions. [2021-06-12 22:16:31,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:16:31,804 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 22:16:31,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:31,806 INFO L225 Difference]: With dead ends: 761 [2021-06-12 22:16:31,806 INFO L226 Difference]: Without dead ends: 749 [2021-06-12 22:16:31,807 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1599.0ms TimeCoverageRelationStatistics Valid=354, Invalid=3186, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:16:31,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-06-12 22:16:31,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 517. [2021-06-12 22:16:31,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 2.294573643410853) internal successors, (1184), 516 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:31,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1184 transitions. [2021-06-12 22:16:31,814 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1184 transitions. Word has length 29 [2021-06-12 22:16:31,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:31,814 INFO L482 AbstractCegarLoop]: Abstraction has 517 states and 1184 transitions. [2021-06-12 22:16:31,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:31,814 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1184 transitions. [2021-06-12 22:16:31,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 22:16:31,815 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:31,815 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:32,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:32,020 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:32,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:32,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1179903925, now seen corresponding path program 23 times [2021-06-12 22:16:32,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:32,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682613389] [2021-06-12 22:16:32,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:32,181 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:32,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:32,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682613389] [2021-06-12 22:16:32,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682613389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:32,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120222606] [2021-06-12 22:16:32,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:32,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:16:32,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:32,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:16:32,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:32,618 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:32,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120222606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:32,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:32,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-06-12 22:16:32,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264959598] [2021-06-12 22:16:32,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 22:16:32,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:32,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 22:16:32,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-12 22:16:32,620 INFO L87 Difference]: Start difference. First operand 517 states and 1184 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:34,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:34,225 INFO L93 Difference]: Finished difference Result 1009 states and 2157 transitions. [2021-06-12 22:16:34,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 22:16:34,226 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 22:16:34,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:34,228 INFO L225 Difference]: With dead ends: 1009 [2021-06-12 22:16:34,228 INFO L226 Difference]: Without dead ends: 975 [2021-06-12 22:16:34,229 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 1499.8ms TimeCoverageRelationStatistics Valid=640, Invalid=3142, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:16:34,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-06-12 22:16:34,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 489. [2021-06-12 22:16:34,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.2684426229508197) internal successors, (1107), 488 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:34,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1107 transitions. [2021-06-12 22:16:34,236 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1107 transitions. Word has length 29 [2021-06-12 22:16:34,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:34,236 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1107 transitions. [2021-06-12 22:16:34,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:34,237 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1107 transitions. [2021-06-12 22:16:34,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:16:34,237 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:34,237 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:34,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:34,457 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:34,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:34,457 INFO L82 PathProgramCache]: Analyzing trace with hash -985517533, now seen corresponding path program 24 times [2021-06-12 22:16:34,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:34,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179347293] [2021-06-12 22:16:34,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:34,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:34,615 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:34,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:34,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179347293] [2021-06-12 22:16:34,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179347293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:34,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844095892] [2021-06-12 22:16:34,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:34,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:16:34,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:34,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:16:34,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:35,087 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:35,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844095892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:35,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:35,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-12 22:16:35,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180372555] [2021-06-12 22:16:35,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 22:16:35,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:35,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 22:16:35,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:16:35,089 INFO L87 Difference]: Start difference. First operand 489 states and 1107 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:36,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:36,222 INFO L93 Difference]: Finished difference Result 1174 states and 2556 transitions. [2021-06-12 22:16:36,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:16:36,223 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 22:16:36,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:36,225 INFO L225 Difference]: With dead ends: 1174 [2021-06-12 22:16:36,225 INFO L226 Difference]: Without dead ends: 1105 [2021-06-12 22:16:36,226 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 1098.8ms TimeCoverageRelationStatistics Valid=495, Invalid=2811, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:16:36,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-06-12 22:16:36,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 560. [2021-06-12 22:16:36,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 559 states have (on average 2.2772808586762077) internal successors, (1273), 559 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:36,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 1273 transitions. [2021-06-12 22:16:36,233 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 1273 transitions. Word has length 31 [2021-06-12 22:16:36,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:36,234 INFO L482 AbstractCegarLoop]: Abstraction has 560 states and 1273 transitions. [2021-06-12 22:16:36,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:36,234 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 1273 transitions. [2021-06-12 22:16:36,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:16:36,234 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:36,234 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:36,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:36,450 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:36,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:36,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1484862347, now seen corresponding path program 25 times [2021-06-12 22:16:36,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:36,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850924373] [2021-06-12 22:16:36,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:36,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:36,637 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:36,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:36,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850924373] [2021-06-12 22:16:36,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850924373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:36,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693780388] [2021-06-12 22:16:36,638 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 22:16:36,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:36,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:16:36,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:37,094 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:37,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693780388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:37,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:37,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-12 22:16:37,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021656275] [2021-06-12 22:16:37,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 22:16:37,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:37,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 22:16:37,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:16:37,095 INFO L87 Difference]: Start difference. First operand 560 states and 1273 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:38,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:38,185 INFO L93 Difference]: Finished difference Result 1108 states and 2432 transitions. [2021-06-12 22:16:38,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 22:16:38,185 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 22:16:38,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:38,188 INFO L225 Difference]: With dead ends: 1108 [2021-06-12 22:16:38,188 INFO L226 Difference]: Without dead ends: 1051 [2021-06-12 22:16:38,188 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1145.8ms TimeCoverageRelationStatistics Valid=432, Invalid=2538, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 22:16:38,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-06-12 22:16:38,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 584. [2021-06-12 22:16:38,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 2.2658662092624358) internal successors, (1321), 583 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:38,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1321 transitions. [2021-06-12 22:16:38,196 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1321 transitions. Word has length 31 [2021-06-12 22:16:38,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:38,196 INFO L482 AbstractCegarLoop]: Abstraction has 584 states and 1321 transitions. [2021-06-12 22:16:38,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:38,196 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1321 transitions. [2021-06-12 22:16:38,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:16:38,197 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:38,197 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:38,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-12 22:16:38,401 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:38,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:38,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1890433653, now seen corresponding path program 26 times [2021-06-12 22:16:38,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:38,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843777001] [2021-06-12 22:16:38,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:38,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:38,564 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:38,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:38,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843777001] [2021-06-12 22:16:38,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843777001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:38,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355621384] [2021-06-12 22:16:38,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:38,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:16:38,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:38,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:16:38,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:39,088 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:39,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355621384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:39,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:39,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-12 22:16:39,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982491731] [2021-06-12 22:16:39,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 22:16:39,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:39,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 22:16:39,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:16:39,090 INFO L87 Difference]: Start difference. First operand 584 states and 1321 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:40,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:40,581 INFO L93 Difference]: Finished difference Result 1217 states and 2662 transitions. [2021-06-12 22:16:40,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 22:16:40,582 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 22:16:40,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:40,585 INFO L225 Difference]: With dead ends: 1217 [2021-06-12 22:16:40,585 INFO L226 Difference]: Without dead ends: 1175 [2021-06-12 22:16:40,585 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 1505.7ms TimeCoverageRelationStatistics Valid=672, Invalid=3618, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 22:16:40,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-06-12 22:16:40,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 651. [2021-06-12 22:16:40,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 650 states have (on average 2.272307692307692) internal successors, (1477), 650 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:40,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1477 transitions. [2021-06-12 22:16:40,594 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1477 transitions. Word has length 31 [2021-06-12 22:16:40,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:40,594 INFO L482 AbstractCegarLoop]: Abstraction has 651 states and 1477 transitions. [2021-06-12 22:16:40,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:40,594 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1477 transitions. [2021-06-12 22:16:40,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:16:40,595 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:40,595 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:40,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:40,813 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:40,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:40,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1975277999, now seen corresponding path program 27 times [2021-06-12 22:16:40,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:40,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931266666] [2021-06-12 22:16:40,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:40,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:41,018 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:41,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:41,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931266666] [2021-06-12 22:16:41,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931266666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:41,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380794276] [2021-06-12 22:16:41,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:41,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:16:41,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:41,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:16:41,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:41,509 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:41,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380794276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:41,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:41,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-12 22:16:41,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092847047] [2021-06-12 22:16:41,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 22:16:41,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:41,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 22:16:41,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:16:41,510 INFO L87 Difference]: Start difference. First operand 651 states and 1477 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:42,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:42,971 INFO L93 Difference]: Finished difference Result 1268 states and 2780 transitions. [2021-06-12 22:16:42,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:16:42,971 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 22:16:42,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:42,974 INFO L225 Difference]: With dead ends: 1268 [2021-06-12 22:16:42,974 INFO L226 Difference]: Without dead ends: 1199 [2021-06-12 22:16:42,975 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 1430.4ms TimeCoverageRelationStatistics Valid=518, Invalid=3022, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:16:42,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2021-06-12 22:16:42,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 655. [2021-06-12 22:16:42,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 2.270642201834862) internal successors, (1485), 654 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:42,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1485 transitions. [2021-06-12 22:16:42,984 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1485 transitions. Word has length 31 [2021-06-12 22:16:42,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:42,984 INFO L482 AbstractCegarLoop]: Abstraction has 655 states and 1485 transitions. [2021-06-12 22:16:42,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:42,984 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1485 transitions. [2021-06-12 22:16:42,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:16:42,985 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:42,985 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:43,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-12 22:16:43,201 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:43,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:43,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1055606703, now seen corresponding path program 28 times [2021-06-12 22:16:43,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:43,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11601280] [2021-06-12 22:16:43,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:43,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:43,367 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:43,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:43,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11601280] [2021-06-12 22:16:43,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11601280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:43,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151533107] [2021-06-12 22:16:43,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:16:43,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:16:43,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:43,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:16:43,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:43,869 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:43,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151533107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:43,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:43,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-12 22:16:43,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310470091] [2021-06-12 22:16:43,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 22:16:43,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:43,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 22:16:43,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:16:43,871 INFO L87 Difference]: Start difference. First operand 655 states and 1485 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:45,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:45,593 INFO L93 Difference]: Finished difference Result 1427 states and 3120 transitions. [2021-06-12 22:16:45,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 22:16:45,593 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 22:16:45,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:45,596 INFO L225 Difference]: With dead ends: 1427 [2021-06-12 22:16:45,597 INFO L226 Difference]: Without dead ends: 1385 [2021-06-12 22:16:45,597 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 1751.3ms TimeCoverageRelationStatistics Valid=819, Invalid=4151, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 22:16:45,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2021-06-12 22:16:45,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 664. [2021-06-12 22:16:45,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 2.277526395173454) internal successors, (1510), 663 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:45,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1510 transitions. [2021-06-12 22:16:45,606 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1510 transitions. Word has length 31 [2021-06-12 22:16:45,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:45,606 INFO L482 AbstractCegarLoop]: Abstraction has 664 states and 1510 transitions. [2021-06-12 22:16:45,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:45,606 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1510 transitions. [2021-06-12 22:16:45,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:16:45,607 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:45,607 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:45,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:45,825 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:45,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:45,825 INFO L82 PathProgramCache]: Analyzing trace with hash 766958067, now seen corresponding path program 29 times [2021-06-12 22:16:45,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:45,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050657009] [2021-06-12 22:16:45,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:45,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:45,995 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:45,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:45,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050657009] [2021-06-12 22:16:45,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050657009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:45,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539750334] [2021-06-12 22:16:45,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:46,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:16:46,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:46,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:16:46,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:46,463 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:46,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539750334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:46,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:46,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-12 22:16:46,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511837450] [2021-06-12 22:16:46,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 22:16:46,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:46,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 22:16:46,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:16:46,464 INFO L87 Difference]: Start difference. First operand 664 states and 1510 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:49,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:49,123 INFO L93 Difference]: Finished difference Result 1966 states and 4209 transitions. [2021-06-12 22:16:49,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 22:16:49,124 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 22:16:49,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:49,129 INFO L225 Difference]: With dead ends: 1966 [2021-06-12 22:16:49,129 INFO L226 Difference]: Without dead ends: 1908 [2021-06-12 22:16:49,129 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2733 ImplicationChecksByTransitivity, 2483.5ms TimeCoverageRelationStatistics Valid=1278, Invalid=6912, Unknown=0, NotChecked=0, Total=8190 [2021-06-12 22:16:49,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2021-06-12 22:16:49,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 774. [2021-06-12 22:16:49,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 2.2923673997412677) internal successors, (1772), 773 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:49,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1772 transitions. [2021-06-12 22:16:49,142 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1772 transitions. Word has length 31 [2021-06-12 22:16:49,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:49,142 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 1772 transitions. [2021-06-12 22:16:49,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:49,142 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1772 transitions. [2021-06-12 22:16:49,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:16:49,143 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:49,144 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:49,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-12 22:16:49,353 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:49,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:49,353 INFO L82 PathProgramCache]: Analyzing trace with hash 497566775, now seen corresponding path program 30 times [2021-06-12 22:16:49,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:49,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12688924] [2021-06-12 22:16:49,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:49,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:49,479 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:49,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:49,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12688924] [2021-06-12 22:16:49,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12688924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:49,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332635026] [2021-06-12 22:16:49,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:49,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:16:49,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:49,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 22:16:49,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:49,925 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:49,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332635026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:49,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:49,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-06-12 22:16:49,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295696803] [2021-06-12 22:16:49,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 22:16:49,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:49,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 22:16:49,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-12 22:16:49,926 INFO L87 Difference]: Start difference. First operand 774 states and 1772 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:51,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:51,209 INFO L93 Difference]: Finished difference Result 1633 states and 3659 transitions. [2021-06-12 22:16:51,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 22:16:51,210 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 22:16:51,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:51,213 INFO L225 Difference]: With dead ends: 1633 [2021-06-12 22:16:51,213 INFO L226 Difference]: Without dead ends: 1633 [2021-06-12 22:16:51,213 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1295.4ms TimeCoverageRelationStatistics Valid=646, Invalid=2660, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:16:51,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2021-06-12 22:16:51,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 814. [2021-06-12 22:16:51,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 2.2976629766297663) internal successors, (1868), 813 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:51,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1868 transitions. [2021-06-12 22:16:51,225 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1868 transitions. Word has length 31 [2021-06-12 22:16:51,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:51,225 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 1868 transitions. [2021-06-12 22:16:51,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:51,226 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1868 transitions. [2021-06-12 22:16:51,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:16:51,227 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:51,227 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:51,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:51,441 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:51,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:51,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1094746873, now seen corresponding path program 31 times [2021-06-12 22:16:51,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:51,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866257859] [2021-06-12 22:16:51,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:51,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:51,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:51,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866257859] [2021-06-12 22:16:51,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866257859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:51,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771851974] [2021-06-12 22:16:51,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:51,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:16:51,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:51,962 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:51,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771851974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:51,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:51,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-06-12 22:16:51,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641807878] [2021-06-12 22:16:51,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 22:16:51,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:51,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 22:16:51,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-06-12 22:16:51,964 INFO L87 Difference]: Start difference. First operand 814 states and 1868 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:54,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:54,989 INFO L93 Difference]: Finished difference Result 1582 states and 3436 transitions. [2021-06-12 22:16:54,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 22:16:54,989 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 22:16:54,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:54,991 INFO L225 Difference]: With dead ends: 1582 [2021-06-12 22:16:54,992 INFO L226 Difference]: Without dead ends: 1525 [2021-06-12 22:16:54,992 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2531 ImplicationChecksByTransitivity, 2648.2ms TimeCoverageRelationStatistics Valid=908, Invalid=7464, Unknown=0, NotChecked=0, Total=8372 [2021-06-12 22:16:54,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2021-06-12 22:16:55,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 860. [2021-06-12 22:16:55,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 2.2980209545983703) internal successors, (1974), 859 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:55,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1974 transitions. [2021-06-12 22:16:55,004 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1974 transitions. Word has length 31 [2021-06-12 22:16:55,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:55,004 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 1974 transitions. [2021-06-12 22:16:55,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:55,004 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1974 transitions. [2021-06-12 22:16:55,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:16:55,005 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:55,005 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:55,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:55,217 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:55,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:55,218 INFO L82 PathProgramCache]: Analyzing trace with hash 175075577, now seen corresponding path program 32 times [2021-06-12 22:16:55,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:55,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050783854] [2021-06-12 22:16:55,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:55,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:55,417 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:55,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:55,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050783854] [2021-06-12 22:16:55,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050783854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:55,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413546860] [2021-06-12 22:16:55,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:55,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:16:55,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:55,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:16:55,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:55,935 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:55,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413546860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:55,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:55,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-12 22:16:55,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559069891] [2021-06-12 22:16:55,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 22:16:55,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:55,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 22:16:55,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:16:55,936 INFO L87 Difference]: Start difference. First operand 860 states and 1974 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:59,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:59,119 INFO L93 Difference]: Finished difference Result 1889 states and 4109 transitions. [2021-06-12 22:16:59,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 22:16:59,119 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 22:16:59,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:59,121 INFO L225 Difference]: With dead ends: 1889 [2021-06-12 22:16:59,121 INFO L226 Difference]: Without dead ends: 1838 [2021-06-12 22:16:59,122 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3198 ImplicationChecksByTransitivity, 3039.3ms TimeCoverageRelationStatistics Valid=1421, Invalid=7891, Unknown=0, NotChecked=0, Total=9312 [2021-06-12 22:16:59,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2021-06-12 22:16:59,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 929. [2021-06-12 22:16:59,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 2.3168103448275863) internal successors, (2150), 928 states have internal predecessors, (2150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:59,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 2150 transitions. [2021-06-12 22:16:59,135 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 2150 transitions. Word has length 31 [2021-06-12 22:16:59,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:59,136 INFO L482 AbstractCegarLoop]: Abstraction has 929 states and 2150 transitions. [2021-06-12 22:16:59,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:59,136 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 2150 transitions. [2021-06-12 22:16:59,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:16:59,137 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:59,137 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:59,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-06-12 22:16:59,353 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:59,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:59,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1294394819, now seen corresponding path program 33 times [2021-06-12 22:16:59,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:59,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534121717] [2021-06-12 22:16:59,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:59,473 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:59,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:59,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534121717] [2021-06-12 22:16:59,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534121717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:59,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709708488] [2021-06-12 22:16:59,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:59,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:16:59,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:59,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:16:59,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:59,932 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:59,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709708488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:59,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:59,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 22:16:59,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604172797] [2021-06-12 22:16:59,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 22:16:59,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:59,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 22:16:59,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:16:59,933 INFO L87 Difference]: Start difference. First operand 929 states and 2150 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:01,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:01,178 INFO L93 Difference]: Finished difference Result 1635 states and 3656 transitions. [2021-06-12 22:17:01,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 22:17:01,178 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 22:17:01,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:01,181 INFO L225 Difference]: With dead ends: 1635 [2021-06-12 22:17:01,181 INFO L226 Difference]: Without dead ends: 1635 [2021-06-12 22:17:01,181 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1254.0ms TimeCoverageRelationStatistics Valid=631, Invalid=2675, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:17:01,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-06-12 22:17:01,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 995. [2021-06-12 22:17:01,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 994 states have (on average 2.3158953722334004) internal successors, (2302), 994 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:01,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 2302 transitions. [2021-06-12 22:17:01,197 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 2302 transitions. Word has length 31 [2021-06-12 22:17:01,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:01,198 INFO L482 AbstractCegarLoop]: Abstraction has 995 states and 2302 transitions. [2021-06-12 22:17:01,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:01,198 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 2302 transitions. [2021-06-12 22:17:01,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:17:01,199 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:01,199 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:01,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:01,415 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:01,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:01,415 INFO L82 PathProgramCache]: Analyzing trace with hash 797857409, now seen corresponding path program 34 times [2021-06-12 22:17:01,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:01,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515332101] [2021-06-12 22:17:01,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:01,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:01,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515332101] [2021-06-12 22:17:01,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515332101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:01,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527851026] [2021-06-12 22:17:01,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:17:01,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:17:01,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:01,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:17:01,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:02,060 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:02,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527851026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:02,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:02,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-12 22:17:02,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519538885] [2021-06-12 22:17:02,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 22:17:02,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:02,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 22:17:02,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:17:02,061 INFO L87 Difference]: Start difference. First operand 995 states and 2302 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:04,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:04,991 INFO L93 Difference]: Finished difference Result 2696 states and 5900 transitions. [2021-06-12 22:17:04,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 22:17:04,991 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 22:17:04,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:04,995 INFO L225 Difference]: With dead ends: 2696 [2021-06-12 22:17:04,995 INFO L226 Difference]: Without dead ends: 2642 [2021-06-12 22:17:04,995 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2427 ImplicationChecksByTransitivity, 2663.8ms TimeCoverageRelationStatistics Valid=1212, Invalid=6444, Unknown=0, NotChecked=0, Total=7656 [2021-06-12 22:17:04,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-06-12 22:17:05,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 1189. [2021-06-12 22:17:05,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 2.3526936026936025) internal successors, (2795), 1188 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:05,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 2795 transitions. [2021-06-12 22:17:05,015 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 2795 transitions. Word has length 31 [2021-06-12 22:17:05,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:05,015 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 2795 transitions. [2021-06-12 22:17:05,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:05,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 2795 transitions. [2021-06-12 22:17:05,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:17:05,017 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:05,017 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:05,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-12 22:17:05,217 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:05,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:05,218 INFO L82 PathProgramCache]: Analyzing trace with hash 67491499, now seen corresponding path program 35 times [2021-06-12 22:17:05,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:05,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745332889] [2021-06-12 22:17:05,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:05,328 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:05,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:05,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745332889] [2021-06-12 22:17:05,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745332889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:05,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814921522] [2021-06-12 22:17:05,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 22:17:05,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 22:17:05,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:05,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 22:17:05,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:05,508 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:17:05,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814921522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:05,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:05,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-06-12 22:17:05,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747383976] [2021-06-12 22:17:05,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:17:05,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:05,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:17:05,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:17:05,509 INFO L87 Difference]: Start difference. First operand 1189 states and 2795 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:07,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:07,342 INFO L93 Difference]: Finished difference Result 2304 states and 5171 transitions. [2021-06-12 22:17:07,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 22:17:07,342 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 22:17:07,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:07,345 INFO L225 Difference]: With dead ends: 2304 [2021-06-12 22:17:07,345 INFO L226 Difference]: Without dead ends: 2208 [2021-06-12 22:17:07,346 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2449 ImplicationChecksByTransitivity, 1542.6ms TimeCoverageRelationStatistics Valid=1219, Invalid=6263, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 22:17:07,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-06-12 22:17:07,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 1478. [2021-06-12 22:17:07,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1477 states have (on average 2.360866621530129) internal successors, (3487), 1477 states have internal predecessors, (3487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:07,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 3487 transitions. [2021-06-12 22:17:07,365 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 3487 transitions. Word has length 31 [2021-06-12 22:17:07,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:07,365 INFO L482 AbstractCegarLoop]: Abstraction has 1478 states and 3487 transitions. [2021-06-12 22:17:07,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:07,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 3487 transitions. [2021-06-12 22:17:07,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:17:07,367 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:07,367 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:07,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:07,585 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:07,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:07,585 INFO L82 PathProgramCache]: Analyzing trace with hash 735083257, now seen corresponding path program 36 times [2021-06-12 22:17:07,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:07,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615439246] [2021-06-12 22:17:07,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:07,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:07,750 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:07,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:07,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615439246] [2021-06-12 22:17:07,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615439246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:07,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167305228] [2021-06-12 22:17:07,750 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 22:17:07,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:17:07,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:07,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 22:17:07,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:08,229 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:08,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167305228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:08,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:08,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-12 22:17:08,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135689264] [2021-06-12 22:17:08,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 22:17:08,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:08,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 22:17:08,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:17:08,230 INFO L87 Difference]: Start difference. First operand 1478 states and 3487 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:10,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:10,293 INFO L93 Difference]: Finished difference Result 2856 states and 6422 transitions. [2021-06-12 22:17:10,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 22:17:10,293 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 22:17:10,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:10,297 INFO L225 Difference]: With dead ends: 2856 [2021-06-12 22:17:10,297 INFO L226 Difference]: Without dead ends: 2771 [2021-06-12 22:17:10,298 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2134 ImplicationChecksByTransitivity, 2049.1ms TimeCoverageRelationStatistics Valid=852, Invalid=5468, Unknown=0, NotChecked=0, Total=6320 [2021-06-12 22:17:10,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2771 states. [2021-06-12 22:17:10,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2771 to 1636. [2021-06-12 22:17:10,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1635 states have (on average 2.3559633027522935) internal successors, (3852), 1635 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:10,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 3852 transitions. [2021-06-12 22:17:10,321 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 3852 transitions. Word has length 31 [2021-06-12 22:17:10,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:10,321 INFO L482 AbstractCegarLoop]: Abstraction has 1636 states and 3852 transitions. [2021-06-12 22:17:10,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:10,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 3852 transitions. [2021-06-12 22:17:10,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:17:10,323 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:10,323 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:10,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-06-12 22:17:10,541 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:10,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:10,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1903077501, now seen corresponding path program 37 times [2021-06-12 22:17:10,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:10,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478439779] [2021-06-12 22:17:10,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:10,776 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:10,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:10,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478439779] [2021-06-12 22:17:10,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478439779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:10,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778467143] [2021-06-12 22:17:10,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:17:10,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:10,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:17:10,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:11,288 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:11,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778467143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:11,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:11,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-12 22:17:11,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52603105] [2021-06-12 22:17:11,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 22:17:11,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:11,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 22:17:11,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:17:11,289 INFO L87 Difference]: Start difference. First operand 1636 states and 3852 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:14,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:14,921 INFO L93 Difference]: Finished difference Result 3900 states and 8693 transitions. [2021-06-12 22:17:14,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-12 22:17:14,922 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 22:17:14,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:14,926 INFO L225 Difference]: With dead ends: 3900 [2021-06-12 22:17:14,926 INFO L226 Difference]: Without dead ends: 3784 [2021-06-12 22:17:14,927 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4357 ImplicationChecksByTransitivity, 3320.5ms TimeCoverageRelationStatistics Valid=1538, Invalid=10452, Unknown=0, NotChecked=0, Total=11990 [2021-06-12 22:17:14,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3784 states. [2021-06-12 22:17:14,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3784 to 1899. [2021-06-12 22:17:14,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1899 states, 1898 states have (on average 2.403582718651212) internal successors, (4562), 1898 states have internal predecessors, (4562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:14,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 4562 transitions. [2021-06-12 22:17:14,953 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 4562 transitions. Word has length 31 [2021-06-12 22:17:14,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:14,953 INFO L482 AbstractCegarLoop]: Abstraction has 1899 states and 4562 transitions. [2021-06-12 22:17:14,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:14,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 4562 transitions. [2021-06-12 22:17:14,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:17:14,955 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:14,955 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:15,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable374 [2021-06-12 22:17:15,171 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:15,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:15,171 INFO L82 PathProgramCache]: Analyzing trace with hash 983406205, now seen corresponding path program 38 times [2021-06-12 22:17:15,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:15,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462382439] [2021-06-12 22:17:15,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:15,364 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:15,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:15,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462382439] [2021-06-12 22:17:15,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462382439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:15,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907274213] [2021-06-12 22:17:15,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:15,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:17:15,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:15,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:17:15,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:15,878 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:15,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907274213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:15,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:15,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-12 22:17:15,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510692062] [2021-06-12 22:17:15,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 22:17:15,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:15,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 22:17:15,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:17:15,879 INFO L87 Difference]: Start difference. First operand 1899 states and 4562 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:19,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:19,013 INFO L93 Difference]: Finished difference Result 3505 states and 7977 transitions. [2021-06-12 22:17:19,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-12 22:17:19,014 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 22:17:19,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:19,017 INFO L225 Difference]: With dead ends: 3505 [2021-06-12 22:17:19,017 INFO L226 Difference]: Without dead ends: 3426 [2021-06-12 22:17:19,018 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2945 ImplicationChecksByTransitivity, 2956.9ms TimeCoverageRelationStatistics Valid=1212, Invalid=7530, Unknown=0, NotChecked=0, Total=8742 [2021-06-12 22:17:19,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3426 states. [2021-06-12 22:17:19,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3426 to 1879. [2021-06-12 22:17:19,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1879 states, 1878 states have (on average 2.3998935037273696) internal successors, (4507), 1878 states have internal predecessors, (4507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:19,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1879 states to 1879 states and 4507 transitions. [2021-06-12 22:17:19,041 INFO L78 Accepts]: Start accepts. Automaton has 1879 states and 4507 transitions. Word has length 31 [2021-06-12 22:17:19,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:19,041 INFO L482 AbstractCegarLoop]: Abstraction has 1879 states and 4507 transitions. [2021-06-12 22:17:19,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:19,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1879 states and 4507 transitions. [2021-06-12 22:17:19,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:17:19,044 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:19,044 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:19,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-12 22:17:19,260 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:19,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:19,260 INFO L82 PathProgramCache]: Analyzing trace with hash -486064191, now seen corresponding path program 39 times [2021-06-12 22:17:19,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:19,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795174495] [2021-06-12 22:17:19,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:19,388 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:17:19,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:19,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795174495] [2021-06-12 22:17:19,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795174495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:19,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856148853] [2021-06-12 22:17:19,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:19,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:17:19,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:19,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:17:19,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:19,778 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:19,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856148853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:19,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:19,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 22:17:19,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145735738] [2021-06-12 22:17:19,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 22:17:19,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:19,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 22:17:19,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:17:19,779 INFO L87 Difference]: Start difference. First operand 1879 states and 4507 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:21,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:21,307 INFO L93 Difference]: Finished difference Result 3076 states and 7034 transitions. [2021-06-12 22:17:21,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 22:17:21,307 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 22:17:21,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:21,310 INFO L225 Difference]: With dead ends: 3076 [2021-06-12 22:17:21,310 INFO L226 Difference]: Without dead ends: 3052 [2021-06-12 22:17:21,310 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 1483.7ms TimeCoverageRelationStatistics Valid=823, Invalid=3337, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 22:17:21,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3052 states. [2021-06-12 22:17:21,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3052 to 1766. [2021-06-12 22:17:21,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1765 states have (on average 2.3507082152974506) internal successors, (4149), 1765 states have internal predecessors, (4149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:21,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 4149 transitions. [2021-06-12 22:17:21,330 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 4149 transitions. Word has length 31 [2021-06-12 22:17:21,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:21,331 INFO L482 AbstractCegarLoop]: Abstraction has 1766 states and 4149 transitions. [2021-06-12 22:17:21,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:21,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 4149 transitions. [2021-06-12 22:17:21,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 22:17:21,332 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:21,332 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:21,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-06-12 22:17:21,533 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:21,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:21,533 INFO L82 PathProgramCache]: Analyzing trace with hash 2101275627, now seen corresponding path program 40 times [2021-06-12 22:17:21,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:21,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478546911] [2021-06-12 22:17:21,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:21,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:21,597 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:21,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:21,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478546911] [2021-06-12 22:17:21,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478546911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:21,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964507768] [2021-06-12 22:17:21,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 22:17:21,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:17:21,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:21,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 22:17:21,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:21,902 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:21,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964507768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:21,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:21,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-06-12 22:17:21,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559062531] [2021-06-12 22:17:21,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 22:17:21,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:21,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 22:17:21,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:17:21,903 INFO L87 Difference]: Start difference. First operand 1766 states and 4149 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:22,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:22,894 INFO L93 Difference]: Finished difference Result 2592 states and 5918 transitions. [2021-06-12 22:17:22,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 22:17:22,894 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 22:17:22,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:22,896 INFO L225 Difference]: With dead ends: 2592 [2021-06-12 22:17:22,897 INFO L226 Difference]: Without dead ends: 2588 [2021-06-12 22:17:22,897 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1218 ImplicationChecksByTransitivity, 882.2ms TimeCoverageRelationStatistics Valid=776, Invalid=3256, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 22:17:22,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-06-12 22:17:22,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 1706. [2021-06-12 22:17:22,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1706 states, 1705 states have (on average 2.3530791788856305) internal successors, (4012), 1705 states have internal predecessors, (4012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:22,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 4012 transitions. [2021-06-12 22:17:22,918 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 4012 transitions. Word has length 31 [2021-06-12 22:17:22,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:22,918 INFO L482 AbstractCegarLoop]: Abstraction has 1706 states and 4012 transitions. [2021-06-12 22:17:22,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:22,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 4012 transitions. [2021-06-12 22:17:22,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:17:22,920 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:22,920 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:23,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable420,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:23,133 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:23,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:23,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1605471457, now seen corresponding path program 41 times [2021-06-12 22:17:23,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:23,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627788713] [2021-06-12 22:17:23,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:23,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:23,212 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:23,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:23,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627788713] [2021-06-12 22:17:23,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627788713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:23,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058043289] [2021-06-12 22:17:23,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:23,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 22:17:23,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:23,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 22:17:23,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:23,544 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:23,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058043289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:23,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:23,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-12 22:17:23,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576981800] [2021-06-12 22:17:23,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 22:17:23,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:23,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 22:17:23,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:17:23,545 INFO L87 Difference]: Start difference. First operand 1706 states and 4012 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:24,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:24,605 INFO L93 Difference]: Finished difference Result 3118 states and 6999 transitions. [2021-06-12 22:17:24,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:17:24,605 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:17:24,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:24,609 INFO L225 Difference]: With dead ends: 3118 [2021-06-12 22:17:24,609 INFO L226 Difference]: Without dead ends: 3109 [2021-06-12 22:17:24,609 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 984.8ms TimeCoverageRelationStatistics Valid=1134, Invalid=3836, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 22:17:24,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3109 states. [2021-06-12 22:17:24,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3109 to 1341. [2021-06-12 22:17:24,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 2.2753731343283583) internal successors, (3049), 1340 states have internal predecessors, (3049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:24,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 3049 transitions. [2021-06-12 22:17:24,634 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 3049 transitions. Word has length 33 [2021-06-12 22:17:24,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:24,634 INFO L482 AbstractCegarLoop]: Abstraction has 1341 states and 3049 transitions. [2021-06-12 22:17:24,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:24,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 3049 transitions. [2021-06-12 22:17:24,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:17:24,635 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:24,635 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:24,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-06-12 22:17:24,847 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:24,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:24,847 INFO L82 PathProgramCache]: Analyzing trace with hash -755955681, now seen corresponding path program 42 times [2021-06-12 22:17:24,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:24,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894233489] [2021-06-12 22:17:24,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:24,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:24,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:24,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894233489] [2021-06-12 22:17:24,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894233489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:24,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260259156] [2021-06-12 22:17:24,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:24,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 22:17:24,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:24,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 22:17:24,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:25,156 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:25,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260259156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:25,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:25,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 22 [2021-06-12 22:17:25,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240894179] [2021-06-12 22:17:25,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 22:17:25,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:25,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 22:17:25,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:17:25,157 INFO L87 Difference]: Start difference. First operand 1341 states and 3049 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:26,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:26,639 INFO L93 Difference]: Finished difference Result 1686 states and 3705 transitions. [2021-06-12 22:17:26,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 22:17:26,639 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:17:26,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:26,640 INFO L225 Difference]: With dead ends: 1686 [2021-06-12 22:17:26,641 INFO L226 Difference]: Without dead ends: 1682 [2021-06-12 22:17:26,641 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2275 ImplicationChecksByTransitivity, 1386.1ms TimeCoverageRelationStatistics Valid=1570, Invalid=5236, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 22:17:26,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2021-06-12 22:17:26,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 953. [2021-06-12 22:17:26,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 2.277310924369748) internal successors, (2168), 952 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:26,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 2168 transitions. [2021-06-12 22:17:26,651 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 2168 transitions. Word has length 33 [2021-06-12 22:17:26,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:26,651 INFO L482 AbstractCegarLoop]: Abstraction has 953 states and 2168 transitions. [2021-06-12 22:17:26,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:26,651 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 2168 transitions. [2021-06-12 22:17:26,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:17:26,652 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:26,652 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:26,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:26,868 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:26,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:26,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1705903345, now seen corresponding path program 43 times [2021-06-12 22:17:26,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:26,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479364034] [2021-06-12 22:17:26,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:26,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:27,059 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:27,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:27,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479364034] [2021-06-12 22:17:27,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479364034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:27,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962111685] [2021-06-12 22:17:27,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:27,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:27,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:17:27,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:27,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962111685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:27,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:27,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-12 22:17:27,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383489420] [2021-06-12 22:17:27,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 22:17:27,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:27,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 22:17:27,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=976, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:17:27,632 INFO L87 Difference]: Start difference. First operand 953 states and 2168 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:29,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:29,608 INFO L93 Difference]: Finished difference Result 1262 states and 2779 transitions. [2021-06-12 22:17:29,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 22:17:29,609 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:17:29,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:29,611 INFO L225 Difference]: With dead ends: 1262 [2021-06-12 22:17:29,611 INFO L226 Difference]: Without dead ends: 1211 [2021-06-12 22:17:29,611 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 2036.8ms TimeCoverageRelationStatistics Valid=429, Invalid=4401, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 22:17:29,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2021-06-12 22:17:29,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 997. [2021-06-12 22:17:29,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 2.2710843373493974) internal successors, (2262), 996 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:29,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 2262 transitions. [2021-06-12 22:17:29,620 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 2262 transitions. Word has length 33 [2021-06-12 22:17:29,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:29,620 INFO L482 AbstractCegarLoop]: Abstraction has 997 states and 2262 transitions. [2021-06-12 22:17:29,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:29,620 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 2262 transitions. [2021-06-12 22:17:29,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:17:29,621 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:29,621 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:29,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:29,836 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:29,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:29,837 INFO L82 PathProgramCache]: Analyzing trace with hash -660596615, now seen corresponding path program 44 times [2021-06-12 22:17:29,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:29,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766150967] [2021-06-12 22:17:29,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:29,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:30,025 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:30,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:30,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766150967] [2021-06-12 22:17:30,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766150967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:30,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576036385] [2021-06-12 22:17:30,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 22:17:30,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:17:30,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:30,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:17:30,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:30,488 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:30,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576036385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:30,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:30,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-12 22:17:30,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490582217] [2021-06-12 22:17:30,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 22:17:30,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:30,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 22:17:30,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:17:30,489 INFO L87 Difference]: Start difference. First operand 997 states and 2262 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:33,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:33,336 INFO L93 Difference]: Finished difference Result 1563 states and 3372 transitions. [2021-06-12 22:17:33,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 22:17:33,336 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:17:33,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:33,337 INFO L225 Difference]: With dead ends: 1563 [2021-06-12 22:17:33,337 INFO L226 Difference]: Without dead ends: 1473 [2021-06-12 22:17:33,338 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2530 ImplicationChecksByTransitivity, 2528.2ms TimeCoverageRelationStatistics Valid=718, Invalid=8024, Unknown=0, NotChecked=0, Total=8742 [2021-06-12 22:17:33,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2021-06-12 22:17:33,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1042. [2021-06-12 22:17:33,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1041 states have (on average 2.2632084534101824) internal successors, (2356), 1041 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:33,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 2356 transitions. [2021-06-12 22:17:33,347 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 2356 transitions. Word has length 33 [2021-06-12 22:17:33,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:33,347 INFO L482 AbstractCegarLoop]: Abstraction has 1042 states and 2356 transitions. [2021-06-12 22:17:33,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:33,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 2356 transitions. [2021-06-12 22:17:33,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:17:33,349 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:33,349 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:33,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-12 22:17:33,565 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:33,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:33,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1395928629, now seen corresponding path program 45 times [2021-06-12 22:17:33,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:33,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163564017] [2021-06-12 22:17:33,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:33,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:33,752 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:33,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:33,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163564017] [2021-06-12 22:17:33,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163564017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:33,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022125966] [2021-06-12 22:17:33,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:33,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:17:33,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:33,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:17:33,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:34,225 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:34,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022125966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:34,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:34,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-12 22:17:34,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195914976] [2021-06-12 22:17:34,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 22:17:34,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:34,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 22:17:34,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:17:34,226 INFO L87 Difference]: Start difference. First operand 1042 states and 2356 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:37,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:37,268 INFO L93 Difference]: Finished difference Result 1689 states and 3627 transitions. [2021-06-12 22:17:37,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-12 22:17:37,269 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:17:37,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:37,270 INFO L225 Difference]: With dead ends: 1689 [2021-06-12 22:17:37,270 INFO L226 Difference]: Without dead ends: 1674 [2021-06-12 22:17:37,271 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3180 ImplicationChecksByTransitivity, 2704.4ms TimeCoverageRelationStatistics Valid=809, Invalid=9697, Unknown=0, NotChecked=0, Total=10506 [2021-06-12 22:17:37,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2021-06-12 22:17:37,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1087. [2021-06-12 22:17:37,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 2.2808471454880292) internal successors, (2477), 1086 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:37,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 2477 transitions. [2021-06-12 22:17:37,281 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 2477 transitions. Word has length 33 [2021-06-12 22:17:37,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:37,281 INFO L482 AbstractCegarLoop]: Abstraction has 1087 states and 2477 transitions. [2021-06-12 22:17:37,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:37,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 2477 transitions. [2021-06-12 22:17:37,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:17:37,282 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:37,282 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:37,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:37,482 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:37,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:37,483 INFO L82 PathProgramCache]: Analyzing trace with hash -2066614151, now seen corresponding path program 46 times [2021-06-12 22:17:37,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:37,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655569823] [2021-06-12 22:17:37,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:37,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:37,661 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:37,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:37,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655569823] [2021-06-12 22:17:37,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655569823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:37,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135821313] [2021-06-12 22:17:37,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:17:37,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:17:37,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:37,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 22:17:37,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:38,210 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:38,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135821313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:38,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:38,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-12 22:17:38,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70611756] [2021-06-12 22:17:38,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 22:17:38,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:38,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 22:17:38,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:17:38,211 INFO L87 Difference]: Start difference. First operand 1087 states and 2477 transitions. Second operand has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:40,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:40,180 INFO L93 Difference]: Finished difference Result 1528 states and 3365 transitions. [2021-06-12 22:17:40,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 22:17:40,180 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:17:40,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:40,182 INFO L225 Difference]: With dead ends: 1528 [2021-06-12 22:17:40,182 INFO L226 Difference]: Without dead ends: 1519 [2021-06-12 22:17:40,182 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2034 ImplicationChecksByTransitivity, 1840.3ms TimeCoverageRelationStatistics Valid=674, Invalid=5806, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 22:17:40,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2021-06-12 22:17:40,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 1171. [2021-06-12 22:17:40,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 2.288034188034188) internal successors, (2677), 1170 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:40,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 2677 transitions. [2021-06-12 22:17:40,197 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 2677 transitions. Word has length 33 [2021-06-12 22:17:40,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:40,197 INFO L482 AbstractCegarLoop]: Abstraction has 1171 states and 2677 transitions. [2021-06-12 22:17:40,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:40,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 2677 transitions. [2021-06-12 22:17:40,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:17:40,198 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:40,198 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:40,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:40,405 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:40,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:40,405 INFO L82 PathProgramCache]: Analyzing trace with hash 2099610557, now seen corresponding path program 47 times [2021-06-12 22:17:40,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:40,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983490937] [2021-06-12 22:17:40,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:40,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:40,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:40,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983490937] [2021-06-12 22:17:40,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983490937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:40,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538805278] [2021-06-12 22:17:40,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:40,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 22:17:40,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:40,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:17:40,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:41,075 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:41,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538805278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:41,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:41,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-12 22:17:41,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318972996] [2021-06-12 22:17:41,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 22:17:41,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:41,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 22:17:41,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:17:41,077 INFO L87 Difference]: Start difference. First operand 1171 states and 2677 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:45,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:45,191 INFO L93 Difference]: Finished difference Result 1919 states and 4191 transitions. [2021-06-12 22:17:45,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-12 22:17:45,191 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:17:45,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:45,193 INFO L225 Difference]: With dead ends: 1919 [2021-06-12 22:17:45,193 INFO L226 Difference]: Without dead ends: 1913 [2021-06-12 22:17:45,194 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2979 ImplicationChecksByTransitivity, 3594.9ms TimeCoverageRelationStatistics Valid=1082, Invalid=9630, Unknown=0, NotChecked=0, Total=10712 [2021-06-12 22:17:45,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-06-12 22:17:45,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1267. [2021-06-12 22:17:45,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1266 states have (on average 2.3183254344391786) internal successors, (2935), 1266 states have internal predecessors, (2935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:45,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 2935 transitions. [2021-06-12 22:17:45,209 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 2935 transitions. Word has length 33 [2021-06-12 22:17:45,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:45,209 INFO L482 AbstractCegarLoop]: Abstraction has 1267 states and 2935 transitions. [2021-06-12 22:17:45,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:45,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 2935 transitions. [2021-06-12 22:17:45,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:17:45,210 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:45,210 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:45,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable523,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:45,411 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:45,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:45,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1545287769, now seen corresponding path program 48 times [2021-06-12 22:17:45,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:45,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463400079] [2021-06-12 22:17:45,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:45,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:45,605 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:45,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:45,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463400079] [2021-06-12 22:17:45,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463400079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:45,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448598162] [2021-06-12 22:17:45,605 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:17:45,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:17:45,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:45,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 22:17:45,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:46,215 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:46,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448598162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:46,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:46,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-12 22:17:46,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016092016] [2021-06-12 22:17:46,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 22:17:46,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:46,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 22:17:46,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:17:46,216 INFO L87 Difference]: Start difference. First operand 1267 states and 2935 transitions. Second operand has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:47,136 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-06-12 22:17:48,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:48,825 INFO L93 Difference]: Finished difference Result 1626 states and 3636 transitions. [2021-06-12 22:17:48,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 22:17:48,826 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:17:48,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:48,827 INFO L225 Difference]: With dead ends: 1626 [2021-06-12 22:17:48,827 INFO L226 Difference]: Without dead ends: 1611 [2021-06-12 22:17:48,827 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 2457.7ms TimeCoverageRelationStatistics Valid=560, Invalid=4552, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 22:17:48,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-06-12 22:17:48,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1287. [2021-06-12 22:17:48,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1286 states have (on average 2.3195956454121305) internal successors, (2983), 1286 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:48,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 2983 transitions. [2021-06-12 22:17:48,841 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 2983 transitions. Word has length 33 [2021-06-12 22:17:48,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:48,841 INFO L482 AbstractCegarLoop]: Abstraction has 1287 states and 2983 transitions. [2021-06-12 22:17:48,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:48,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 2983 transitions. [2021-06-12 22:17:48,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:17:48,842 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:48,842 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:49,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:49,061 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:49,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:49,061 INFO L82 PathProgramCache]: Analyzing trace with hash 497583413, now seen corresponding path program 49 times [2021-06-12 22:17:49,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:49,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773499837] [2021-06-12 22:17:49,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:49,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:49,420 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:49,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:49,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773499837] [2021-06-12 22:17:49,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773499837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:49,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144686631] [2021-06-12 22:17:49,421 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:49,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:49,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:17:49,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:49,786 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:49,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144686631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:49,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:49,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 27 [2021-06-12 22:17:49,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029495355] [2021-06-12 22:17:49,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 22:17:49,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:49,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 22:17:49,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:17:49,787 INFO L87 Difference]: Start difference. First operand 1287 states and 2983 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:51,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:51,392 INFO L93 Difference]: Finished difference Result 1934 states and 4341 transitions. [2021-06-12 22:17:51,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:17:51,392 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:17:51,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:51,394 INFO L225 Difference]: With dead ends: 1934 [2021-06-12 22:17:51,394 INFO L226 Difference]: Without dead ends: 1918 [2021-06-12 22:17:51,394 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1601.0ms TimeCoverageRelationStatistics Valid=491, Invalid=3049, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:17:51,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-06-12 22:17:51,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1287. [2021-06-12 22:17:51,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1286 states have (on average 2.3149300155520995) internal successors, (2977), 1286 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:51,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 2977 transitions. [2021-06-12 22:17:51,407 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 2977 transitions. Word has length 33 [2021-06-12 22:17:51,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:51,407 INFO L482 AbstractCegarLoop]: Abstraction has 1287 states and 2977 transitions. [2021-06-12 22:17:51,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:51,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 2977 transitions. [2021-06-12 22:17:51,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:17:51,408 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:51,408 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:51,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:51,622 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:51,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:51,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1527671729, now seen corresponding path program 50 times [2021-06-12 22:17:51,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:51,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143668571] [2021-06-12 22:17:51,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:51,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:51,855 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:51,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:51,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143668571] [2021-06-12 22:17:51,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143668571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:51,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418374853] [2021-06-12 22:17:51,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 22:17:51,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:17:51,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:51,881 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 22:17:51,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:52,660 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:52,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418374853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:52,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:52,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-06-12 22:17:52,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317664797] [2021-06-12 22:17:52,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 22:17:52,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:52,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 22:17:52,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:17:52,661 INFO L87 Difference]: Start difference. First operand 1287 states and 2977 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:54,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:54,710 INFO L93 Difference]: Finished difference Result 1543 states and 3469 transitions. [2021-06-12 22:17:54,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 22:17:54,712 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:17:54,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:54,713 INFO L225 Difference]: With dead ends: 1543 [2021-06-12 22:17:54,713 INFO L226 Difference]: Without dead ends: 1491 [2021-06-12 22:17:54,713 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 2176.6ms TimeCoverageRelationStatistics Valid=481, Invalid=4489, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 22:17:54,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2021-06-12 22:17:54,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1288. [2021-06-12 22:17:54,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 2.312354312354312) internal successors, (2976), 1287 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:54,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 2976 transitions. [2021-06-12 22:17:54,724 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 2976 transitions. Word has length 33 [2021-06-12 22:17:54,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:54,724 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 2976 transitions. [2021-06-12 22:17:54,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:54,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 2976 transitions. [2021-06-12 22:17:54,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:17:54,726 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:54,726 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:54,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2021-06-12 22:17:54,926 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:54,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:54,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1040701503, now seen corresponding path program 51 times [2021-06-12 22:17:54,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:54,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94744495] [2021-06-12 22:17:54,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:54,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:55,144 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:55,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:55,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94744495] [2021-06-12 22:17:55,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94744495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:55,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507962543] [2021-06-12 22:17:55,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:55,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:17:55,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:55,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:17:55,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:55,770 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:55,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507962543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:55,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:55,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-12 22:17:55,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078520731] [2021-06-12 22:17:55,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 22:17:55,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:55,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 22:17:55,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:17:55,771 INFO L87 Difference]: Start difference. First operand 1288 states and 2976 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:59,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:59,486 INFO L93 Difference]: Finished difference Result 1720 states and 3833 transitions. [2021-06-12 22:17:59,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-12 22:17:59,487 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:17:59,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:59,488 INFO L225 Difference]: With dead ends: 1720 [2021-06-12 22:17:59,488 INFO L226 Difference]: Without dead ends: 1654 [2021-06-12 22:17:59,489 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2654 ImplicationChecksByTransitivity, 3461.9ms TimeCoverageRelationStatistics Valid=647, Invalid=8665, Unknown=0, NotChecked=0, Total=9312 [2021-06-12 22:17:59,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2021-06-12 22:17:59,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1395. [2021-06-12 22:17:59,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1394 states have (on average 2.317790530846485) internal successors, (3231), 1394 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:59,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 3231 transitions. [2021-06-12 22:17:59,501 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 3231 transitions. Word has length 33 [2021-06-12 22:17:59,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:59,501 INFO L482 AbstractCegarLoop]: Abstraction has 1395 states and 3231 transitions. [2021-06-12 22:17:59,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:59,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 3231 transitions. [2021-06-12 22:17:59,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:17:59,502 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:59,502 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:59,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-06-12 22:17:59,703 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:59,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:59,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1325798457, now seen corresponding path program 52 times [2021-06-12 22:17:59,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:59,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699406049] [2021-06-12 22:17:59,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:59,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:59,894 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:59,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:59,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699406049] [2021-06-12 22:17:59,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699406049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:59,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619946925] [2021-06-12 22:17:59,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:59,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:17:59,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:59,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:17:59,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:00,452 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:00,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619946925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:00,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:00,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-12 22:18:00,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414166900] [2021-06-12 22:18:00,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 22:18:00,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:00,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 22:18:00,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=973, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:18:00,453 INFO L87 Difference]: Start difference. First operand 1395 states and 3231 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:05,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:05,869 INFO L93 Difference]: Finished difference Result 1758 states and 3924 transitions. [2021-06-12 22:18:05,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-12 22:18:05,870 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:18:05,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:05,871 INFO L225 Difference]: With dead ends: 1758 [2021-06-12 22:18:05,871 INFO L226 Difference]: Without dead ends: 1734 [2021-06-12 22:18:05,872 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4515 ImplicationChecksByTransitivity, 5009.0ms TimeCoverageRelationStatistics Valid=947, Invalid=13095, Unknown=0, NotChecked=0, Total=14042 [2021-06-12 22:18:05,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-06-12 22:18:05,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1409. [2021-06-12 22:18:05,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 2.321022727272727) internal successors, (3268), 1408 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:05,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 3268 transitions. [2021-06-12 22:18:05,891 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 3268 transitions. Word has length 33 [2021-06-12 22:18:05,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:05,891 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 3268 transitions. [2021-06-12 22:18:05,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:05,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 3268 transitions. [2021-06-12 22:18:05,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:18:05,893 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:05,893 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:06,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-06-12 22:18:06,106 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:06,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:06,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1454541045, now seen corresponding path program 53 times [2021-06-12 22:18:06,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:06,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275025225] [2021-06-12 22:18:06,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:06,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:06,307 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:06,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:06,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275025225] [2021-06-12 22:18:06,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275025225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:06,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143906090] [2021-06-12 22:18:06,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:06,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 22:18:06,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:06,333 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 22:18:06,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:06,967 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:06,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143906090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:06,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:06,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-12 22:18:06,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071178693] [2021-06-12 22:18:06,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 22:18:06,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:06,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 22:18:06,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:18:06,968 INFO L87 Difference]: Start difference. First operand 1409 states and 3268 transitions. Second operand has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:09,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:09,808 INFO L93 Difference]: Finished difference Result 2073 states and 4601 transitions. [2021-06-12 22:18:09,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 22:18:09,809 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:18:09,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:09,811 INFO L225 Difference]: With dead ends: 2073 [2021-06-12 22:18:09,811 INFO L226 Difference]: Without dead ends: 2070 [2021-06-12 22:18:09,811 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2117 ImplicationChecksByTransitivity, 2798.5ms TimeCoverageRelationStatistics Valid=756, Invalid=6216, Unknown=0, NotChecked=0, Total=6972 [2021-06-12 22:18:09,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2021-06-12 22:18:09,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 1510. [2021-06-12 22:18:09,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1509 states have (on average 2.3459244532803183) internal successors, (3540), 1509 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:09,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 3540 transitions. [2021-06-12 22:18:09,827 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 3540 transitions. Word has length 33 [2021-06-12 22:18:09,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:09,827 INFO L482 AbstractCegarLoop]: Abstraction has 1510 states and 3540 transitions. [2021-06-12 22:18:09,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:09,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 3540 transitions. [2021-06-12 22:18:09,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:18:09,828 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:09,828 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:10,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-06-12 22:18:10,037 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:10,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:10,037 INFO L82 PathProgramCache]: Analyzing trace with hash 121030207, now seen corresponding path program 54 times [2021-06-12 22:18:10,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:10,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502958471] [2021-06-12 22:18:10,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:10,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:10,304 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:10,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:10,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502958471] [2021-06-12 22:18:10,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502958471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:10,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233190629] [2021-06-12 22:18:10,305 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:10,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:18:10,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:10,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 22:18:10,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:10,886 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:10,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233190629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:10,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:10,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-12 22:18:10,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625474123] [2021-06-12 22:18:10,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 22:18:10,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:10,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 22:18:10,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:18:10,887 INFO L87 Difference]: Start difference. First operand 1510 states and 3540 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:13,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:13,461 INFO L93 Difference]: Finished difference Result 2367 states and 5373 transitions. [2021-06-12 22:18:13,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 22:18:13,461 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:18:13,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:13,464 INFO L225 Difference]: With dead ends: 2367 [2021-06-12 22:18:13,464 INFO L226 Difference]: Without dead ends: 2333 [2021-06-12 22:18:13,464 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 2530.1ms TimeCoverageRelationStatistics Valid=589, Invalid=3833, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 22:18:13,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2021-06-12 22:18:13,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1622. [2021-06-12 22:18:13,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 2.338679827267119) internal successors, (3791), 1621 states have internal predecessors, (3791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:13,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 3791 transitions. [2021-06-12 22:18:13,481 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 3791 transitions. Word has length 33 [2021-06-12 22:18:13,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:13,481 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 3791 transitions. [2021-06-12 22:18:13,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:13,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 3791 transitions. [2021-06-12 22:18:13,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:18:13,483 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:13,483 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:13,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable652 [2021-06-12 22:18:13,683 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:13,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:13,684 INFO L82 PathProgramCache]: Analyzing trace with hash -167618429, now seen corresponding path program 55 times [2021-06-12 22:18:13,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:13,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554920852] [2021-06-12 22:18:13,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:13,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:13,943 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:13,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:13,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554920852] [2021-06-12 22:18:13,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554920852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:13,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097406391] [2021-06-12 22:18:13,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:13,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:13,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 22:18:13,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:14,457 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:14,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097406391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:14,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:14,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-06-12 22:18:14,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026175778] [2021-06-12 22:18:14,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 22:18:14,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:14,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 22:18:14,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:18:14,458 INFO L87 Difference]: Start difference. First operand 1622 states and 3791 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:17,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:17,592 INFO L93 Difference]: Finished difference Result 2788 states and 6296 transitions. [2021-06-12 22:18:17,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:18:17,592 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:18:17,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:17,594 INFO L225 Difference]: With dead ends: 2788 [2021-06-12 22:18:17,595 INFO L226 Difference]: Without dead ends: 2754 [2021-06-12 22:18:17,595 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 2865.2ms TimeCoverageRelationStatistics Valid=761, Invalid=4939, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 22:18:17,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2754 states. [2021-06-12 22:18:17,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2754 to 1754. [2021-06-12 22:18:17,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1754 states, 1753 states have (on average 2.3462635482030803) internal successors, (4113), 1753 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:17,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 4113 transitions. [2021-06-12 22:18:17,613 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 4113 transitions. Word has length 33 [2021-06-12 22:18:17,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:17,613 INFO L482 AbstractCegarLoop]: Abstraction has 1754 states and 4113 transitions. [2021-06-12 22:18:17,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:17,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 4113 transitions. [2021-06-12 22:18:17,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:18:17,615 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:17,615 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:17,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:17,822 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:17,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:17,822 INFO L82 PathProgramCache]: Analyzing trace with hash 534308859, now seen corresponding path program 56 times [2021-06-12 22:18:17,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:17,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368901489] [2021-06-12 22:18:17,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:18,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:18,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368901489] [2021-06-12 22:18:18,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368901489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:18,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229429311] [2021-06-12 22:18:18,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:18,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:18:18,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:18,061 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 22:18:18,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:18,729 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:18,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229429311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:18,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:18,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-12 22:18:18,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385718746] [2021-06-12 22:18:18,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 22:18:18,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:18,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 22:18:18,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:18:18,730 INFO L87 Difference]: Start difference. First operand 1754 states and 4113 transitions. Second operand has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:20,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:20,659 INFO L93 Difference]: Finished difference Result 2147 states and 4872 transitions. [2021-06-12 22:18:20,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 22:18:20,660 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:18:20,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:20,661 INFO L225 Difference]: With dead ends: 2147 [2021-06-12 22:18:20,661 INFO L226 Difference]: Without dead ends: 2126 [2021-06-12 22:18:20,662 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 1817.5ms TimeCoverageRelationStatistics Valid=340, Invalid=4082, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 22:18:20,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-06-12 22:18:20,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1806. [2021-06-12 22:18:20,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1805 states have (on average 2.3473684210526318) internal successors, (4237), 1805 states have internal predecessors, (4237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:20,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 4237 transitions. [2021-06-12 22:18:20,678 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 4237 transitions. Word has length 33 [2021-06-12 22:18:20,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:20,678 INFO L482 AbstractCegarLoop]: Abstraction has 1806 states and 4237 transitions. [2021-06-12 22:18:20,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:20,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 4237 transitions. [2021-06-12 22:18:20,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:18:20,680 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:20,680 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:20,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable692,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:20,881 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:20,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:20,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1630351679, now seen corresponding path program 57 times [2021-06-12 22:18:20,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:20,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277399891] [2021-06-12 22:18:20,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:20,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:21,102 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:21,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:21,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277399891] [2021-06-12 22:18:21,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277399891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:21,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537926235] [2021-06-12 22:18:21,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:21,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:18:21,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:21,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 22:18:21,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:21,688 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:21,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537926235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:21,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:21,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-12 22:18:21,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516238772] [2021-06-12 22:18:21,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 22:18:21,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:21,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 22:18:21,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:18:21,689 INFO L87 Difference]: Start difference. First operand 1806 states and 4237 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:24,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:24,044 INFO L93 Difference]: Finished difference Result 2353 states and 5326 transitions. [2021-06-12 22:18:24,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 22:18:24,045 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:18:24,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:24,047 INFO L225 Difference]: With dead ends: 2353 [2021-06-12 22:18:24,047 INFO L226 Difference]: Without dead ends: 2311 [2021-06-12 22:18:24,047 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1812 ImplicationChecksByTransitivity, 2333.5ms TimeCoverageRelationStatistics Valid=799, Invalid=5521, Unknown=0, NotChecked=0, Total=6320 [2021-06-12 22:18:24,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2311 states. [2021-06-12 22:18:24,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2311 to 1865. [2021-06-12 22:18:24,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1864 states have (on average 2.342811158798283) internal successors, (4367), 1864 states have internal predecessors, (4367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:24,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 4367 transitions. [2021-06-12 22:18:24,063 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 4367 transitions. Word has length 33 [2021-06-12 22:18:24,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:24,064 INFO L482 AbstractCegarLoop]: Abstraction has 1865 states and 4367 transitions. [2021-06-12 22:18:24,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:24,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 4367 transitions. [2021-06-12 22:18:24,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:18:24,066 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:24,066 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:24,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable708,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:24,281 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:24,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:24,281 INFO L82 PathProgramCache]: Analyzing trace with hash -385362437, now seen corresponding path program 58 times [2021-06-12 22:18:24,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:24,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457294491] [2021-06-12 22:18:24,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:24,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:24,546 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:24,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:24,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457294491] [2021-06-12 22:18:24,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457294491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:24,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030745341] [2021-06-12 22:18:24,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:24,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:18:24,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:24,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 22:18:24,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:25,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030745341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:25,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:25,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-06-12 22:18:25,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446311132] [2021-06-12 22:18:25,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 22:18:25,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:25,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 22:18:25,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:18:25,059 INFO L87 Difference]: Start difference. First operand 1865 states and 4367 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:27,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:27,596 INFO L93 Difference]: Finished difference Result 3037 states and 6913 transitions. [2021-06-12 22:18:27,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 22:18:27,596 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:18:27,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:27,598 INFO L225 Difference]: With dead ends: 3037 [2021-06-12 22:18:27,598 INFO L226 Difference]: Without dead ends: 2970 [2021-06-12 22:18:27,598 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 2518.3ms TimeCoverageRelationStatistics Valid=826, Invalid=4576, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 22:18:27,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2970 states. [2021-06-12 22:18:27,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2970 to 1932. [2021-06-12 22:18:27,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 2.335059554634904) internal successors, (4509), 1931 states have internal predecessors, (4509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:27,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 4509 transitions. [2021-06-12 22:18:27,618 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 4509 transitions. Word has length 33 [2021-06-12 22:18:27,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:27,618 INFO L482 AbstractCegarLoop]: Abstraction has 1932 states and 4509 transitions. [2021-06-12 22:18:27,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:27,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 4509 transitions. [2021-06-12 22:18:27,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:18:27,620 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:27,620 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:27,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable730 [2021-06-12 22:18:27,824 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:27,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:27,824 INFO L82 PathProgramCache]: Analyzing trace with hash 237419395, now seen corresponding path program 59 times [2021-06-12 22:18:27,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:27,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314939898] [2021-06-12 22:18:27,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:27,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:27,990 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:27,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:27,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314939898] [2021-06-12 22:18:27,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314939898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:27,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087067212] [2021-06-12 22:18:27,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:28,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 22:18:28,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:28,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 22:18:28,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:28,504 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:28,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087067212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:28,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:28,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-06-12 22:18:28,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618250816] [2021-06-12 22:18:28,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 22:18:28,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:28,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 22:18:28,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:18:28,505 INFO L87 Difference]: Start difference. First operand 1932 states and 4509 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:31,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:31,129 INFO L93 Difference]: Finished difference Result 3720 states and 8375 transitions. [2021-06-12 22:18:31,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 22:18:31,129 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:18:31,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:31,132 INFO L225 Difference]: With dead ends: 3720 [2021-06-12 22:18:31,132 INFO L226 Difference]: Without dead ends: 3639 [2021-06-12 22:18:31,132 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 2414.1ms TimeCoverageRelationStatistics Valid=944, Invalid=4908, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 22:18:31,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3639 states. [2021-06-12 22:18:31,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3639 to 2060. [2021-06-12 22:18:31,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2060 states, 2059 states have (on average 2.329286061194755) internal successors, (4796), 2059 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:31,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 4796 transitions. [2021-06-12 22:18:31,155 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 4796 transitions. Word has length 33 [2021-06-12 22:18:31,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:31,155 INFO L482 AbstractCegarLoop]: Abstraction has 2060 states and 4796 transitions. [2021-06-12 22:18:31,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:31,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 4796 transitions. [2021-06-12 22:18:31,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 22:18:31,157 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:31,157 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:31,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable748,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:31,357 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:31,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:31,358 INFO L82 PathProgramCache]: Analyzing trace with hash 174645243, now seen corresponding path program 60 times [2021-06-12 22:18:31,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:31,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797816838] [2021-06-12 22:18:31,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:31,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:31,585 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:31,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:31,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797816838] [2021-06-12 22:18:31,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797816838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:31,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617697544] [2021-06-12 22:18:31,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:31,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:18:31,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:31,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 22:18:31,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:32,129 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:32,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617697544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:32,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:32,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-06-12 22:18:32,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347402314] [2021-06-12 22:18:32,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 22:18:32,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:32,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 22:18:32,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:18:32,130 INFO L87 Difference]: Start difference. First operand 2060 states and 4796 transitions. Second operand has 32 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:35,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:35,141 INFO L93 Difference]: Finished difference Result 3836 states and 8664 transitions. [2021-06-12 22:18:35,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 22:18:35,141 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-12 22:18:35,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:35,144 INFO L225 Difference]: With dead ends: 3836 [2021-06-12 22:18:35,144 INFO L226 Difference]: Without dead ends: 3773 [2021-06-12 22:18:35,144 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2003 ImplicationChecksByTransitivity, 2870.1ms TimeCoverageRelationStatistics Valid=1036, Invalid=6620, Unknown=0, NotChecked=0, Total=7656 [2021-06-12 22:18:35,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3773 states. [2021-06-12 22:18:35,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3773 to 2341. [2021-06-12 22:18:35,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2341 states, 2340 states have (on average 2.345726495726496) internal successors, (5489), 2340 states have internal predecessors, (5489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:35,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2341 states to 2341 states and 5489 transitions. [2021-06-12 22:18:35,169 INFO L78 Accepts]: Start accepts. Automaton has 2341 states and 5489 transitions. Word has length 33 [2021-06-12 22:18:35,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:35,169 INFO L482 AbstractCegarLoop]: Abstraction has 2341 states and 5489 transitions. [2021-06-12 22:18:35,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.9375) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:35,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2341 states and 5489 transitions. [2021-06-12 22:18:35,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:18:35,172 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:35,172 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:35,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable765 [2021-06-12 22:18:35,372 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:35,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:35,373 INFO L82 PathProgramCache]: Analyzing trace with hash 42093407, now seen corresponding path program 61 times [2021-06-12 22:18:35,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:35,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150334199] [2021-06-12 22:18:35,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:35,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:35,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150334199] [2021-06-12 22:18:35,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150334199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:35,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916703589] [2021-06-12 22:18:35,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:35,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:35,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 22:18:35,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:36,126 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:36,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916703589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:36,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:36,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-12 22:18:36,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584802527] [2021-06-12 22:18:36,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 22:18:36,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:36,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 22:18:36,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:18:36,127 INFO L87 Difference]: Start difference. First operand 2341 states and 5489 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:37,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:37,651 INFO L93 Difference]: Finished difference Result 3299 states and 7593 transitions. [2021-06-12 22:18:37,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 22:18:37,652 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:18:37,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:37,655 INFO L225 Difference]: With dead ends: 3299 [2021-06-12 22:18:37,655 INFO L226 Difference]: Without dead ends: 3247 [2021-06-12 22:18:37,655 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 1509.6ms TimeCoverageRelationStatistics Valid=669, Invalid=4023, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 22:18:37,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2021-06-12 22:18:37,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 2377. [2021-06-12 22:18:37,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 2376 states have (on average 2.3434343434343434) internal successors, (5568), 2376 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:37,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 5568 transitions. [2021-06-12 22:18:37,678 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 5568 transitions. Word has length 35 [2021-06-12 22:18:37,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:37,678 INFO L482 AbstractCegarLoop]: Abstraction has 2377 states and 5568 transitions. [2021-06-12 22:18:37,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:37,678 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 5568 transitions. [2021-06-12 22:18:37,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:18:37,681 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:37,681 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:37,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-06-12 22:18:37,881 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:37,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:37,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1208064305, now seen corresponding path program 62 times [2021-06-12 22:18:37,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:37,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886138572] [2021-06-12 22:18:37,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:37,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:38,102 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:38,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:38,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886138572] [2021-06-12 22:18:38,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886138572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:38,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959373554] [2021-06-12 22:18:38,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:38,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:18:38,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:38,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 22:18:38,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:38,652 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:38,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959373554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:38,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:38,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-12 22:18:38,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180220299] [2021-06-12 22:18:38,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 22:18:38,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:38,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 22:18:38,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:18:38,653 INFO L87 Difference]: Start difference. First operand 2377 states and 5568 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:40,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:40,116 INFO L93 Difference]: Finished difference Result 3241 states and 7484 transitions. [2021-06-12 22:18:40,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 22:18:40,116 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:18:40,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:40,119 INFO L225 Difference]: With dead ends: 3241 [2021-06-12 22:18:40,119 INFO L226 Difference]: Without dead ends: 3193 [2021-06-12 22:18:40,120 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 1440.7ms TimeCoverageRelationStatistics Valid=571, Invalid=3589, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 22:18:40,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3193 states. [2021-06-12 22:18:40,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3193 to 2387. [2021-06-12 22:18:40,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2386 states have (on average 2.341994970662196) internal successors, (5588), 2386 states have internal predecessors, (5588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:40,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 5588 transitions. [2021-06-12 22:18:40,145 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 5588 transitions. Word has length 35 [2021-06-12 22:18:40,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:40,145 INFO L482 AbstractCegarLoop]: Abstraction has 2387 states and 5588 transitions. [2021-06-12 22:18:40,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:40,145 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 5588 transitions. [2021-06-12 22:18:40,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:18:40,148 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:40,148 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:40,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable802,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:40,348 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:40,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:40,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1268866609, now seen corresponding path program 63 times [2021-06-12 22:18:40,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:40,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217989047] [2021-06-12 22:18:40,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:40,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:40,539 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:40,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:40,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217989047] [2021-06-12 22:18:40,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217989047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:40,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303638954] [2021-06-12 22:18:40,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:40,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:18:40,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:40,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 22:18:40,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:41,092 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:41,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303638954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:41,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:41,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-12 22:18:41,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376221439] [2021-06-12 22:18:41,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 22:18:41,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:41,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 22:18:41,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:18:41,093 INFO L87 Difference]: Start difference. First operand 2387 states and 5588 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:43,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:43,059 INFO L93 Difference]: Finished difference Result 3451 states and 7906 transitions. [2021-06-12 22:18:43,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 22:18:43,059 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:18:43,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:43,062 INFO L225 Difference]: With dead ends: 3451 [2021-06-12 22:18:43,062 INFO L226 Difference]: Without dead ends: 3409 [2021-06-12 22:18:43,063 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 1987.0ms TimeCoverageRelationStatistics Valid=923, Invalid=5083, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 22:18:43,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3409 states. [2021-06-12 22:18:43,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3409 to 2419. [2021-06-12 22:18:43,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2419 states, 2418 states have (on average 2.339950372208437) internal successors, (5658), 2418 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:43,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2419 states to 2419 states and 5658 transitions. [2021-06-12 22:18:43,089 INFO L78 Accepts]: Start accepts. Automaton has 2419 states and 5658 transitions. Word has length 35 [2021-06-12 22:18:43,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:43,089 INFO L482 AbstractCegarLoop]: Abstraction has 2419 states and 5658 transitions. [2021-06-12 22:18:43,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:43,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2419 states and 5658 transitions. [2021-06-12 22:18:43,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:18:43,092 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:43,092 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:43,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable822,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:43,308 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:43,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:43,309 INFO L82 PathProgramCache]: Analyzing trace with hash 2098249707, now seen corresponding path program 64 times [2021-06-12 22:18:43,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:43,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79730382] [2021-06-12 22:18:43,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:43,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:43,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:43,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79730382] [2021-06-12 22:18:43,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79730382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:43,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733936744] [2021-06-12 22:18:43,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:43,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:18:43,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:43,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 22:18:43,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:44,089 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:44,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733936744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:44,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:44,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-12 22:18:44,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684745426] [2021-06-12 22:18:44,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 22:18:44,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:44,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 22:18:44,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:18:44,090 INFO L87 Difference]: Start difference. First operand 2419 states and 5658 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:45,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:45,810 INFO L93 Difference]: Finished difference Result 3327 states and 7665 transitions. [2021-06-12 22:18:45,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 22:18:45,811 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:18:45,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:45,814 INFO L225 Difference]: With dead ends: 3327 [2021-06-12 22:18:45,814 INFO L226 Difference]: Without dead ends: 3273 [2021-06-12 22:18:45,814 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 1795.5ms TimeCoverageRelationStatistics Valid=674, Invalid=4156, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 22:18:45,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2021-06-12 22:18:45,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 2423. [2021-06-12 22:18:45,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2423 states, 2422 states have (on average 2.3393889347646573) internal successors, (5666), 2422 states have internal predecessors, (5666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:45,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 5666 transitions. [2021-06-12 22:18:45,842 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 5666 transitions. Word has length 35 [2021-06-12 22:18:45,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:45,842 INFO L482 AbstractCegarLoop]: Abstraction has 2423 states and 5666 transitions. [2021-06-12 22:18:45,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:45,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 5666 transitions. [2021-06-12 22:18:45,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:18:45,845 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:45,845 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:46,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable840 [2021-06-12 22:18:46,045 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:46,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:46,046 INFO L82 PathProgramCache]: Analyzing trace with hash -2135915285, now seen corresponding path program 65 times [2021-06-12 22:18:46,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:46,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998855518] [2021-06-12 22:18:46,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:46,252 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:46,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:46,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998855518] [2021-06-12 22:18:46,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998855518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:46,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146962841] [2021-06-12 22:18:46,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:46,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 22:18:46,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:46,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 22:18:46,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:46,847 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:46,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146962841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:46,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:46,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-12 22:18:46,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554807225] [2021-06-12 22:18:46,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 22:18:46,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:46,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 22:18:46,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:18:46,849 INFO L87 Difference]: Start difference. First operand 2423 states and 5666 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:49,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:49,166 INFO L93 Difference]: Finished difference Result 3537 states and 8101 transitions. [2021-06-12 22:18:49,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:18:49,166 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:18:49,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:49,169 INFO L225 Difference]: With dead ends: 3537 [2021-06-12 22:18:49,169 INFO L226 Difference]: Without dead ends: 3495 [2021-06-12 22:18:49,169 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 2334.4ms TimeCoverageRelationStatistics Valid=1079, Invalid=5563, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 22:18:49,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3495 states. [2021-06-12 22:18:49,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3495 to 2421. [2021-06-12 22:18:49,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2421 states, 2420 states have (on average 2.3396694214876033) internal successors, (5662), 2420 states have internal predecessors, (5662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:49,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2421 states to 2421 states and 5662 transitions. [2021-06-12 22:18:49,192 INFO L78 Accepts]: Start accepts. Automaton has 2421 states and 5662 transitions. Word has length 35 [2021-06-12 22:18:49,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:49,192 INFO L482 AbstractCegarLoop]: Abstraction has 2421 states and 5662 transitions. [2021-06-12 22:18:49,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:49,192 INFO L276 IsEmpty]: Start isEmpty. Operand 2421 states and 5662 transitions. [2021-06-12 22:18:49,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:18:49,194 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:49,194 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:49,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable858 [2021-06-12 22:18:49,395 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:49,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:49,395 INFO L82 PathProgramCache]: Analyzing trace with hash -354380241, now seen corresponding path program 66 times [2021-06-12 22:18:49,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:49,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071579247] [2021-06-12 22:18:49,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:49,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:49,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:49,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071579247] [2021-06-12 22:18:49,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071579247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:49,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375155650] [2021-06-12 22:18:49,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:49,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:18:49,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:49,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 22:18:49,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:50,187 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:50,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375155650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:50,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:50,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-12 22:18:50,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465566516] [2021-06-12 22:18:50,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 22:18:50,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:50,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 22:18:50,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:18:50,188 INFO L87 Difference]: Start difference. First operand 2421 states and 5662 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:53,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:53,246 INFO L93 Difference]: Finished difference Result 3760 states and 8574 transitions. [2021-06-12 22:18:53,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-12 22:18:53,246 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:18:53,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:53,249 INFO L225 Difference]: With dead ends: 3760 [2021-06-12 22:18:53,249 INFO L226 Difference]: Without dead ends: 3718 [2021-06-12 22:18:53,250 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 2910.8ms TimeCoverageRelationStatistics Valid=1483, Invalid=8219, Unknown=0, NotChecked=0, Total=9702 [2021-06-12 22:18:53,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3718 states. [2021-06-12 22:18:53,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3718 to 2453. [2021-06-12 22:18:53,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 2452 states have (on average 2.33931484502447) internal successors, (5736), 2452 states have internal predecessors, (5736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:53,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 5736 transitions. [2021-06-12 22:18:53,276 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 5736 transitions. Word has length 35 [2021-06-12 22:18:53,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:53,276 INFO L482 AbstractCegarLoop]: Abstraction has 2453 states and 5736 transitions. [2021-06-12 22:18:53,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:53,276 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 5736 transitions. [2021-06-12 22:18:53,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:18:53,278 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:53,278 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:53,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable879,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:53,497 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:53,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:53,497 INFO L82 PathProgramCache]: Analyzing trace with hash -643028877, now seen corresponding path program 67 times [2021-06-12 22:18:53,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:53,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345049333] [2021-06-12 22:18:53,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:53,683 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:53,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:53,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345049333] [2021-06-12 22:18:53,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345049333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:53,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753077702] [2021-06-12 22:18:53,683 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:53,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 22:18:53,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:54,305 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:54,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753077702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:54,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:54,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-12 22:18:54,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936106035] [2021-06-12 22:18:54,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 22:18:54,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:54,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 22:18:54,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:18:54,306 INFO L87 Difference]: Start difference. First operand 2453 states and 5736 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:57,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:57,907 INFO L93 Difference]: Finished difference Result 4092 states and 9200 transitions. [2021-06-12 22:18:57,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-12 22:18:57,908 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:18:57,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:57,912 INFO L225 Difference]: With dead ends: 4092 [2021-06-12 22:18:57,912 INFO L226 Difference]: Without dead ends: 4052 [2021-06-12 22:18:57,913 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4119 ImplicationChecksByTransitivity, 3387.5ms TimeCoverageRelationStatistics Valid=1844, Invalid=10146, Unknown=0, NotChecked=0, Total=11990 [2021-06-12 22:18:57,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4052 states. [2021-06-12 22:18:57,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4052 to 2489. [2021-06-12 22:18:57,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2489 states, 2488 states have (on average 2.3392282958199355) internal successors, (5820), 2488 states have internal predecessors, (5820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:57,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2489 states to 2489 states and 5820 transitions. [2021-06-12 22:18:57,944 INFO L78 Accepts]: Start accepts. Automaton has 2489 states and 5820 transitions. Word has length 35 [2021-06-12 22:18:57,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:57,944 INFO L482 AbstractCegarLoop]: Abstraction has 2489 states and 5820 transitions. [2021-06-12 22:18:57,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:57,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2489 states and 5820 transitions. [2021-06-12 22:18:57,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:18:57,946 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:57,946 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:58,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable898,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:58,147 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:58,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:58,147 INFO L82 PathProgramCache]: Analyzing trace with hash 268401591, now seen corresponding path program 68 times [2021-06-12 22:18:58,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:58,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166382354] [2021-06-12 22:18:58,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:58,337 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:58,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:58,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166382354] [2021-06-12 22:18:58,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166382354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:58,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688293109] [2021-06-12 22:18:58,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:58,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:18:58,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:58,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 22:18:58,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:58,903 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:58,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688293109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:58,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:58,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-12 22:18:58,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661032490] [2021-06-12 22:18:58,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 22:18:58,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:58,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 22:18:58,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:18:58,904 INFO L87 Difference]: Start difference. First operand 2489 states and 5820 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:02,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:02,651 INFO L93 Difference]: Finished difference Result 4809 states and 10645 transitions. [2021-06-12 22:19:02,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-12 22:19:02,651 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:19:02,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:02,655 INFO L225 Difference]: With dead ends: 4809 [2021-06-12 22:19:02,655 INFO L226 Difference]: Without dead ends: 4769 [2021-06-12 22:19:02,656 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3487 ImplicationChecksByTransitivity, 3235.9ms TimeCoverageRelationStatistics Valid=1613, Invalid=9099, Unknown=0, NotChecked=0, Total=10712 [2021-06-12 22:19:02,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4769 states. [2021-06-12 22:19:02,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4769 to 2561. [2021-06-12 22:19:02,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 2560 states have (on average 2.346875) internal successors, (6008), 2560 states have internal predecessors, (6008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:02,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 6008 transitions. [2021-06-12 22:19:02,685 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 6008 transitions. Word has length 35 [2021-06-12 22:19:02,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:02,685 INFO L482 AbstractCegarLoop]: Abstraction has 2561 states and 6008 transitions. [2021-06-12 22:19:02,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:02,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 6008 transitions. [2021-06-12 22:19:02,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:19:02,687 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:02,687 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:02,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable922,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:02,888 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:02,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:02,888 INFO L82 PathProgramCache]: Analyzing trace with hash -461964319, now seen corresponding path program 69 times [2021-06-12 22:19:02,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:02,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158345985] [2021-06-12 22:19:02,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:02,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:03,035 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:03,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:03,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158345985] [2021-06-12 22:19:03,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158345985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:03,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313385154] [2021-06-12 22:19:03,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:03,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 22:19:03,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:03,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:19:03,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:03,444 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:19:03,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313385154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:03,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:03,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-12 22:19:03,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382955433] [2021-06-12 22:19:03,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 22:19:03,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:03,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 22:19:03,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:19:03,445 INFO L87 Difference]: Start difference. First operand 2561 states and 6008 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:04,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:04,888 INFO L93 Difference]: Finished difference Result 3689 states and 8571 transitions. [2021-06-12 22:19:04,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:19:04,888 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:19:04,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:04,892 INFO L225 Difference]: With dead ends: 3689 [2021-06-12 22:19:04,892 INFO L226 Difference]: Without dead ends: 3687 [2021-06-12 22:19:04,892 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 1283.4ms TimeCoverageRelationStatistics Valid=607, Invalid=3299, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 22:19:04,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3687 states. [2021-06-12 22:19:04,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3687 to 2760. [2021-06-12 22:19:04,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2760 states, 2759 states have (on average 2.3599130119608556) internal successors, (6511), 2759 states have internal predecessors, (6511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:04,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2760 states to 2760 states and 6511 transitions. [2021-06-12 22:19:04,921 INFO L78 Accepts]: Start accepts. Automaton has 2760 states and 6511 transitions. Word has length 35 [2021-06-12 22:19:04,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:04,921 INFO L482 AbstractCegarLoop]: Abstraction has 2760 states and 6511 transitions. [2021-06-12 22:19:04,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:04,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2760 states and 6511 transitions. [2021-06-12 22:19:04,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:19:04,923 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:04,923 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:05,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable940,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:05,124 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:05,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:05,124 INFO L82 PathProgramCache]: Analyzing trace with hash 2016394933, now seen corresponding path program 70 times [2021-06-12 22:19:05,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:05,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396013925] [2021-06-12 22:19:05,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:05,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:05,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:05,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396013925] [2021-06-12 22:19:05,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396013925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:05,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447030148] [2021-06-12 22:19:05,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:05,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:19:05,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:05,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 22:19:05,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:05,952 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:05,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447030148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:05,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:05,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-12 22:19:05,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57194487] [2021-06-12 22:19:05,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 22:19:05,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:05,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 22:19:05,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:19:05,953 INFO L87 Difference]: Start difference. First operand 2760 states and 6511 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:09,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:09,288 INFO L93 Difference]: Finished difference Result 3976 states and 9161 transitions. [2021-06-12 22:19:09,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-12 22:19:09,288 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:19:09,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:09,292 INFO L225 Difference]: With dead ends: 3976 [2021-06-12 22:19:09,292 INFO L226 Difference]: Without dead ends: 3916 [2021-06-12 22:19:09,293 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3668 ImplicationChecksByTransitivity, 3162.8ms TimeCoverageRelationStatistics Valid=1313, Invalid=9193, Unknown=0, NotChecked=0, Total=10506 [2021-06-12 22:19:09,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3916 states. [2021-06-12 22:19:09,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3916 to 2774. [2021-06-12 22:19:09,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2774 states, 2773 states have (on average 2.3609808871258564) internal successors, (6547), 2773 states have internal predecessors, (6547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:09,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2774 states to 2774 states and 6547 transitions. [2021-06-12 22:19:09,323 INFO L78 Accepts]: Start accepts. Automaton has 2774 states and 6547 transitions. Word has length 35 [2021-06-12 22:19:09,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:09,323 INFO L482 AbstractCegarLoop]: Abstraction has 2774 states and 6547 transitions. [2021-06-12 22:19:09,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:09,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2774 states and 6547 transitions. [2021-06-12 22:19:09,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:19:09,326 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:09,326 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:09,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable956 [2021-06-12 22:19:09,526 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:09,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:09,527 INFO L82 PathProgramCache]: Analyzing trace with hash 2077197237, now seen corresponding path program 71 times [2021-06-12 22:19:09,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:09,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463175224] [2021-06-12 22:19:09,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:09,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:09,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:09,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463175224] [2021-06-12 22:19:09,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463175224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:09,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361937271] [2021-06-12 22:19:09,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:09,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 22:19:09,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:09,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 22:19:09,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:10,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361937271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:10,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:10,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-12 22:19:10,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212166738] [2021-06-12 22:19:10,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 22:19:10,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:10,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 22:19:10,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:19:10,371 INFO L87 Difference]: Start difference. First operand 2774 states and 6547 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:13,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:13,536 INFO L93 Difference]: Finished difference Result 4131 states and 9524 transitions. [2021-06-12 22:19:13,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 22:19:13,536 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:19:13,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:13,540 INFO L225 Difference]: With dead ends: 4131 [2021-06-12 22:19:13,540 INFO L226 Difference]: Without dead ends: 4089 [2021-06-12 22:19:13,541 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3041 ImplicationChecksByTransitivity, 3052.1ms TimeCoverageRelationStatistics Valid=1423, Invalid=7889, Unknown=0, NotChecked=0, Total=9312 [2021-06-12 22:19:13,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4089 states. [2021-06-12 22:19:13,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4089 to 2805. [2021-06-12 22:19:13,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2805 states, 2804 states have (on average 2.361626248216833) internal successors, (6622), 2804 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:13,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2805 states to 2805 states and 6622 transitions. [2021-06-12 22:19:13,574 INFO L78 Accepts]: Start accepts. Automaton has 2805 states and 6622 transitions. Word has length 35 [2021-06-12 22:19:13,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:13,575 INFO L482 AbstractCegarLoop]: Abstraction has 2805 states and 6622 transitions. [2021-06-12 22:19:13,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:13,575 INFO L276 IsEmpty]: Start isEmpty. Operand 2805 states and 6622 transitions. [2021-06-12 22:19:13,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:19:13,577 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:13,577 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:13,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable977,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:13,777 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:13,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:13,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1617056775, now seen corresponding path program 72 times [2021-06-12 22:19:13,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:13,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078780397] [2021-06-12 22:19:13,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:13,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:13,956 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:13,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:13,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078780397] [2021-06-12 22:19:13,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078780397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:13,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143637711] [2021-06-12 22:19:13,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:13,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:19:13,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:13,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:19:13,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:14,351 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:14,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143637711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:14,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:14,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-12 22:19:14,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348970594] [2021-06-12 22:19:14,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 22:19:14,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:14,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 22:19:14,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:19:14,352 INFO L87 Difference]: Start difference. First operand 2805 states and 6622 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:16,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:16,030 INFO L93 Difference]: Finished difference Result 3500 states and 8075 transitions. [2021-06-12 22:19:16,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 22:19:16,030 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:19:16,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:16,033 INFO L225 Difference]: With dead ends: 3500 [2021-06-12 22:19:16,033 INFO L226 Difference]: Without dead ends: 3500 [2021-06-12 22:19:16,033 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 1613.7ms TimeCoverageRelationStatistics Valid=849, Invalid=3981, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 22:19:16,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3500 states. [2021-06-12 22:19:16,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3500 to 2817. [2021-06-12 22:19:16,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2817 states, 2816 states have (on average 2.3597301136363638) internal successors, (6645), 2816 states have internal predecessors, (6645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:16,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2817 states to 2817 states and 6645 transitions. [2021-06-12 22:19:16,059 INFO L78 Accepts]: Start accepts. Automaton has 2817 states and 6645 transitions. Word has length 35 [2021-06-12 22:19:16,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:16,059 INFO L482 AbstractCegarLoop]: Abstraction has 2817 states and 6645 transitions. [2021-06-12 22:19:16,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:16,059 INFO L276 IsEmpty]: Start isEmpty. Operand 2817 states and 6645 transitions. [2021-06-12 22:19:16,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:19:16,061 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:16,061 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:16,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable998 [2021-06-12 22:19:16,265 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:16,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:16,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1905705411, now seen corresponding path program 73 times [2021-06-12 22:19:16,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:16,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562752602] [2021-06-12 22:19:16,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:16,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:16,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562752602] [2021-06-12 22:19:16,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562752602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:16,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716366938] [2021-06-12 22:19:16,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:16,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:19:16,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:16,892 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:16,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716366938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:16,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:16,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-12 22:19:16,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921214988] [2021-06-12 22:19:16,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 22:19:16,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:16,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 22:19:16,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:19:16,892 INFO L87 Difference]: Start difference. First operand 2817 states and 6645 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:18,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:18,726 INFO L93 Difference]: Finished difference Result 3661 states and 8422 transitions. [2021-06-12 22:19:18,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 22:19:18,727 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:19:18,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:18,729 INFO L225 Difference]: With dead ends: 3661 [2021-06-12 22:19:18,729 INFO L226 Difference]: Without dead ends: 3661 [2021-06-12 22:19:18,730 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 1783.2ms TimeCoverageRelationStatistics Valid=939, Invalid=4463, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 22:19:18,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3661 states. [2021-06-12 22:19:18,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3661 to 2821. [2021-06-12 22:19:18,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2821 states, 2820 states have (on average 2.3613475177304966) internal successors, (6659), 2820 states have internal predecessors, (6659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:18,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2821 states to 2821 states and 6659 transitions. [2021-06-12 22:19:18,762 INFO L78 Accepts]: Start accepts. Automaton has 2821 states and 6659 transitions. Word has length 35 [2021-06-12 22:19:18,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:18,762 INFO L482 AbstractCegarLoop]: Abstraction has 2821 states and 6659 transitions. [2021-06-12 22:19:18,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:18,762 INFO L276 IsEmpty]: Start isEmpty. Operand 2821 states and 6659 transitions. [2021-06-12 22:19:18,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:19:18,764 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:18,764 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:18,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1014,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:18,965 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:18,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:18,965 INFO L82 PathProgramCache]: Analyzing trace with hash -994274943, now seen corresponding path program 74 times [2021-06-12 22:19:18,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:18,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872406153] [2021-06-12 22:19:18,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:19,127 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:19,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:19,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872406153] [2021-06-12 22:19:19,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872406153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:19,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170928504] [2021-06-12 22:19:19,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:19,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:19:19,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:19,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:19:19,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:19,526 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:19,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170928504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:19,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:19,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-12 22:19:19,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128264198] [2021-06-12 22:19:19,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 22:19:19,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:19,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 22:19:19,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:19:19,527 INFO L87 Difference]: Start difference. First operand 2821 states and 6659 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:21,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:21,243 INFO L93 Difference]: Finished difference Result 4400 states and 10185 transitions. [2021-06-12 22:19:21,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 22:19:21,243 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:19:21,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:21,247 INFO L225 Difference]: With dead ends: 4400 [2021-06-12 22:19:21,247 INFO L226 Difference]: Without dead ends: 4400 [2021-06-12 22:19:21,247 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 1672.0ms TimeCoverageRelationStatistics Valid=887, Invalid=4225, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 22:19:21,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4400 states. [2021-06-12 22:19:21,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4400 to 2832. [2021-06-12 22:19:21,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2832 states, 2831 states have (on average 2.362062875309078) internal successors, (6687), 2831 states have internal predecessors, (6687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:21,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 6687 transitions. [2021-06-12 22:19:21,276 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 6687 transitions. Word has length 35 [2021-06-12 22:19:21,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:21,276 INFO L482 AbstractCegarLoop]: Abstraction has 2832 states and 6687 transitions. [2021-06-12 22:19:21,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:21,276 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 6687 transitions. [2021-06-12 22:19:21,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:19:21,279 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:21,279 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:21,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1033 [2021-06-12 22:19:21,479 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:21,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:21,479 INFO L82 PathProgramCache]: Analyzing trace with hash -22956363, now seen corresponding path program 75 times [2021-06-12 22:19:21,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:21,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982399326] [2021-06-12 22:19:21,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:21,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:21,689 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:21,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:21,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982399326] [2021-06-12 22:19:21,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982399326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:21,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770626441] [2021-06-12 22:19:21,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:21,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:19:21,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:21,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 22:19:21,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:22,254 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:22,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770626441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:22,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:22,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-12 22:19:22,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497171138] [2021-06-12 22:19:22,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 22:19:22,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:22,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 22:19:22,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:19:22,255 INFO L87 Difference]: Start difference. First operand 2832 states and 6687 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:25,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:25,053 INFO L93 Difference]: Finished difference Result 4002 states and 9232 transitions. [2021-06-12 22:19:25,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 22:19:25,053 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:19:25,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:25,057 INFO L225 Difference]: With dead ends: 4002 [2021-06-12 22:19:25,057 INFO L226 Difference]: Without dead ends: 3948 [2021-06-12 22:19:25,057 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2853 ImplicationChecksByTransitivity, 2678.0ms TimeCoverageRelationStatistics Valid=1083, Invalid=7473, Unknown=0, NotChecked=0, Total=8556 [2021-06-12 22:19:25,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2021-06-12 22:19:25,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 2856. [2021-06-12 22:19:25,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2856 states, 2855 states have (on average 2.360420315236427) internal successors, (6739), 2855 states have internal predecessors, (6739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:25,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2856 states to 2856 states and 6739 transitions. [2021-06-12 22:19:25,084 INFO L78 Accepts]: Start accepts. Automaton has 2856 states and 6739 transitions. Word has length 35 [2021-06-12 22:19:25,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:25,084 INFO L482 AbstractCegarLoop]: Abstraction has 2856 states and 6739 transitions. [2021-06-12 22:19:25,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:25,085 INFO L276 IsEmpty]: Start isEmpty. Operand 2856 states and 6739 transitions. [2021-06-12 22:19:25,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:19:25,087 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:25,087 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:25,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1052,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:25,288 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:25,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:25,288 INFO L82 PathProgramCache]: Analyzing trace with hash -44282443, now seen corresponding path program 76 times [2021-06-12 22:19:25,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:25,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37844964] [2021-06-12 22:19:25,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:25,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:25,500 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:25,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:25,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37844964] [2021-06-12 22:19:25,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37844964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:25,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531260462] [2021-06-12 22:19:25,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:25,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:19:25,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:25,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 22:19:25,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:26,056 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:26,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531260462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:26,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:26,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-12 22:19:26,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645999667] [2021-06-12 22:19:26,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 22:19:26,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:26,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 22:19:26,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:19:26,057 INFO L87 Difference]: Start difference. First operand 2856 states and 6739 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:28,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:28,550 INFO L93 Difference]: Finished difference Result 3842 states and 8918 transitions. [2021-06-12 22:19:28,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 22:19:28,550 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:19:28,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:28,553 INFO L225 Difference]: With dead ends: 3842 [2021-06-12 22:19:28,553 INFO L226 Difference]: Without dead ends: 3770 [2021-06-12 22:19:28,554 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1845 ImplicationChecksByTransitivity, 2471.3ms TimeCoverageRelationStatistics Valid=887, Invalid=5119, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 22:19:28,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3770 states. [2021-06-12 22:19:28,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3770 to 2860. [2021-06-12 22:19:28,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2860 states, 2859 states have (on average 2.3585169639734174) internal successors, (6743), 2859 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:28,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2860 states to 2860 states and 6743 transitions. [2021-06-12 22:19:28,580 INFO L78 Accepts]: Start accepts. Automaton has 2860 states and 6743 transitions. Word has length 35 [2021-06-12 22:19:28,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:28,580 INFO L482 AbstractCegarLoop]: Abstraction has 2860 states and 6743 transitions. [2021-06-12 22:19:28,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:28,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2860 states and 6743 transitions. [2021-06-12 22:19:28,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:19:28,583 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:28,583 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:28,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1071,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:28,783 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:28,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:28,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1833180341, now seen corresponding path program 77 times [2021-06-12 22:19:28,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:28,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607245291] [2021-06-12 22:19:28,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:28,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:28,914 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:28,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:28,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607245291] [2021-06-12 22:19:28,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607245291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:28,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367468665] [2021-06-12 22:19:28,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:28,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 22:19:28,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:28,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:19:28,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:29,324 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:29,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367468665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:29,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:29,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-12 22:19:29,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390143774] [2021-06-12 22:19:29,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 22:19:29,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:29,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 22:19:29,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:19:29,325 INFO L87 Difference]: Start difference. First operand 2860 states and 6743 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:31,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:31,001 INFO L93 Difference]: Finished difference Result 5084 states and 11781 transitions. [2021-06-12 22:19:31,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 22:19:31,001 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:19:31,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:31,005 INFO L225 Difference]: With dead ends: 5084 [2021-06-12 22:19:31,005 INFO L226 Difference]: Without dead ends: 5084 [2021-06-12 22:19:31,006 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 1547.1ms TimeCoverageRelationStatistics Valid=771, Invalid=3651, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 22:19:31,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5084 states. [2021-06-12 22:19:31,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5084 to 3004. [2021-06-12 22:19:31,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3004 states, 3003 states have (on average 2.3533133533133532) internal successors, (7067), 3003 states have internal predecessors, (7067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:31,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3004 states to 3004 states and 7067 transitions. [2021-06-12 22:19:31,036 INFO L78 Accepts]: Start accepts. Automaton has 3004 states and 7067 transitions. Word has length 35 [2021-06-12 22:19:31,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:31,036 INFO L482 AbstractCegarLoop]: Abstraction has 3004 states and 7067 transitions. [2021-06-12 22:19:31,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:31,037 INFO L276 IsEmpty]: Start isEmpty. Operand 3004 states and 7067 transitions. [2021-06-12 22:19:31,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:19:31,039 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:31,039 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:31,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1093 [2021-06-12 22:19:31,239 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:31,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:31,240 INFO L82 PathProgramCache]: Analyzing trace with hash 846119997, now seen corresponding path program 78 times [2021-06-12 22:19:31,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:31,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639687209] [2021-06-12 22:19:31,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:31,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:31,379 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:19:31,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:31,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639687209] [2021-06-12 22:19:31,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639687209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:31,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273824945] [2021-06-12 22:19:31,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:31,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 22:19:31,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:31,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 22:19:31,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:31,572 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:19:31,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273824945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:31,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:31,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-06-12 22:19:31,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130738119] [2021-06-12 22:19:31,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 22:19:31,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:31,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 22:19:31,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-12 22:19:31,573 INFO L87 Difference]: Start difference. First operand 3004 states and 7067 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:32,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:32,565 INFO L93 Difference]: Finished difference Result 4189 states and 9617 transitions. [2021-06-12 22:19:32,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 22:19:32,565 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:19:32,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:32,569 INFO L225 Difference]: With dead ends: 4189 [2021-06-12 22:19:32,569 INFO L226 Difference]: Without dead ends: 4153 [2021-06-12 22:19:32,569 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 863.3ms TimeCoverageRelationStatistics Valid=521, Invalid=2341, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 22:19:32,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4153 states. [2021-06-12 22:19:32,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4153 to 2873. [2021-06-12 22:19:32,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2873 states, 2872 states have (on average 2.3467966573816157) internal successors, (6740), 2872 states have internal predecessors, (6740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:32,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2873 states to 2873 states and 6740 transitions. [2021-06-12 22:19:32,599 INFO L78 Accepts]: Start accepts. Automaton has 2873 states and 6740 transitions. Word has length 35 [2021-06-12 22:19:32,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:32,599 INFO L482 AbstractCegarLoop]: Abstraction has 2873 states and 6740 transitions. [2021-06-12 22:19:32,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:32,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2873 states and 6740 transitions. [2021-06-12 22:19:32,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:19:32,602 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:32,602 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:32,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-06-12 22:19:32,813 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:32,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:32,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1809722061, now seen corresponding path program 79 times [2021-06-12 22:19:32,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:32,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732725572] [2021-06-12 22:19:32,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:32,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:33,012 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:33,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:33,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732725572] [2021-06-12 22:19:33,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732725572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:33,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940972842] [2021-06-12 22:19:33,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:33,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 22:19:33,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:33,629 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:33,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940972842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:33,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:33,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-12 22:19:33,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254760414] [2021-06-12 22:19:33,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 22:19:33,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:33,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 22:19:33,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:19:33,630 INFO L87 Difference]: Start difference. First operand 2873 states and 6740 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:37,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:37,008 INFO L93 Difference]: Finished difference Result 4270 states and 9783 transitions. [2021-06-12 22:19:37,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-12 22:19:37,008 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:19:37,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:37,012 INFO L225 Difference]: With dead ends: 4270 [2021-06-12 22:19:37,012 INFO L226 Difference]: Without dead ends: 4222 [2021-06-12 22:19:37,013 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3551 ImplicationChecksByTransitivity, 3340.1ms TimeCoverageRelationStatistics Valid=1575, Invalid=8727, Unknown=0, NotChecked=0, Total=10302 [2021-06-12 22:19:37,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4222 states. [2021-06-12 22:19:37,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4222 to 2879. [2021-06-12 22:19:37,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 2.3467685892981236) internal successors, (6754), 2878 states have internal predecessors, (6754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:37,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 6754 transitions. [2021-06-12 22:19:37,041 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 6754 transitions. Word has length 35 [2021-06-12 22:19:37,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:37,041 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 6754 transitions. [2021-06-12 22:19:37,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:37,041 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 6754 transitions. [2021-06-12 22:19:37,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:19:37,043 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:37,043 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:37,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1116,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:37,256 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:37,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:37,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1249714381, now seen corresponding path program 80 times [2021-06-12 22:19:37,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:37,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470101682] [2021-06-12 22:19:37,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:37,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:37,456 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:19:37,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:37,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470101682] [2021-06-12 22:19:37,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470101682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:37,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061879368] [2021-06-12 22:19:37,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:37,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:19:37,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:37,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 22:19:37,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:37,997 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:37,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061879368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:37,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:37,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-12 22:19:37,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884548299] [2021-06-12 22:19:37,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 22:19:37,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:37,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 22:19:37,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:19:37,998 INFO L87 Difference]: Start difference. First operand 2879 states and 6754 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:40,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:40,705 INFO L93 Difference]: Finished difference Result 5077 states and 11546 transitions. [2021-06-12 22:19:40,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 22:19:40,705 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:19:40,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:40,710 INFO L225 Difference]: With dead ends: 5077 [2021-06-12 22:19:40,710 INFO L226 Difference]: Without dead ends: 4993 [2021-06-12 22:19:40,711 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2361 ImplicationChecksByTransitivity, 2680.1ms TimeCoverageRelationStatistics Valid=1052, Invalid=6258, Unknown=0, NotChecked=0, Total=7310 [2021-06-12 22:19:40,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4993 states. [2021-06-12 22:19:40,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4993 to 3061. [2021-06-12 22:19:40,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3061 states, 3060 states have (on average 2.3532679738562092) internal successors, (7201), 3060 states have internal predecessors, (7201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:40,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3061 states to 3061 states and 7201 transitions. [2021-06-12 22:19:40,745 INFO L78 Accepts]: Start accepts. Automaton has 3061 states and 7201 transitions. Word has length 35 [2021-06-12 22:19:40,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:40,745 INFO L482 AbstractCegarLoop]: Abstraction has 3061 states and 7201 transitions. [2021-06-12 22:19:40,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:40,745 INFO L276 IsEmpty]: Start isEmpty. Operand 3061 states and 7201 transitions. [2021-06-12 22:19:40,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:19:40,747 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:40,747 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:40,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1136 [2021-06-12 22:19:40,948 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:40,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:40,948 INFO L82 PathProgramCache]: Analyzing trace with hash -366524553, now seen corresponding path program 81 times [2021-06-12 22:19:40,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:40,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499466120] [2021-06-12 22:19:40,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:41,119 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:41,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:41,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499466120] [2021-06-12 22:19:41,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499466120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:41,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122523755] [2021-06-12 22:19:41,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:41,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 22:19:41,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:41,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 22:19:41,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:41,734 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:41,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122523755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:41,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:41,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-12 22:19:41,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618268606] [2021-06-12 22:19:41,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 22:19:41,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:41,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 22:19:41,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:19:41,735 INFO L87 Difference]: Start difference. First operand 3061 states and 7201 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:45,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:45,044 INFO L93 Difference]: Finished difference Result 5205 states and 11840 transitions. [2021-06-12 22:19:45,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 22:19:45,045 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:19:45,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:45,050 INFO L225 Difference]: With dead ends: 5205 [2021-06-12 22:19:45,050 INFO L226 Difference]: Without dead ends: 5157 [2021-06-12 22:19:45,050 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2893 ImplicationChecksByTransitivity, 3087.7ms TimeCoverageRelationStatistics Valid=1325, Invalid=7417, Unknown=0, NotChecked=0, Total=8742 [2021-06-12 22:19:45,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5157 states. [2021-06-12 22:19:45,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5157 to 3104. [2021-06-12 22:19:45,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3104 states, 3103 states have (on average 2.350306155333548) internal successors, (7293), 3103 states have internal predecessors, (7293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:45,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3104 states to 3104 states and 7293 transitions. [2021-06-12 22:19:45,084 INFO L78 Accepts]: Start accepts. Automaton has 3104 states and 7293 transitions. Word has length 35 [2021-06-12 22:19:45,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:45,084 INFO L482 AbstractCegarLoop]: Abstraction has 3104 states and 7293 transitions. [2021-06-12 22:19:45,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:45,084 INFO L276 IsEmpty]: Start isEmpty. Operand 3104 states and 7293 transitions. [2021-06-12 22:19:45,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:19:45,087 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:45,087 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:45,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1154 [2021-06-12 22:19:45,301 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:45,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:45,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1433047865, now seen corresponding path program 82 times [2021-06-12 22:19:45,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:45,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473833887] [2021-06-12 22:19:45,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:45,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:45,589 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:45,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:45,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473833887] [2021-06-12 22:19:45,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473833887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:45,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663690426] [2021-06-12 22:19:45,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:45,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:19:45,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:45,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 22:19:45,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:46,202 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:46,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663690426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:46,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:46,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-12 22:19:46,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469908942] [2021-06-12 22:19:46,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 22:19:46,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:46,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 22:19:46,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:19:46,203 INFO L87 Difference]: Start difference. First operand 3104 states and 7293 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:50,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:50,748 INFO L93 Difference]: Finished difference Result 4625 states and 10559 transitions. [2021-06-12 22:19:50,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-12 22:19:50,748 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:19:50,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:50,752 INFO L225 Difference]: With dead ends: 4625 [2021-06-12 22:19:50,752 INFO L226 Difference]: Without dead ends: 4559 [2021-06-12 22:19:50,752 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5744 ImplicationChecksByTransitivity, 4299.2ms TimeCoverageRelationStatistics Valid=2007, Invalid=13493, Unknown=0, NotChecked=0, Total=15500 [2021-06-12 22:19:50,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4559 states. [2021-06-12 22:19:50,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4559 to 3124. [2021-06-12 22:19:50,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3124 states, 3123 states have (on average 2.3519052193403778) internal successors, (7345), 3123 states have internal predecessors, (7345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:50,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3124 states to 3124 states and 7345 transitions. [2021-06-12 22:19:50,785 INFO L78 Accepts]: Start accepts. Automaton has 3124 states and 7345 transitions. Word has length 35 [2021-06-12 22:19:50,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:50,785 INFO L482 AbstractCegarLoop]: Abstraction has 3124 states and 7345 transitions. [2021-06-12 22:19:50,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:50,785 INFO L276 IsEmpty]: Start isEmpty. Operand 3124 states and 7345 transitions. [2021-06-12 22:19:50,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:19:50,788 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:50,788 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:50,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1174,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:50,989 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:50,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:50,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1902771911, now seen corresponding path program 83 times [2021-06-12 22:19:50,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:50,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699363463] [2021-06-12 22:19:50,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:50,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:51,257 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:51,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:51,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699363463] [2021-06-12 22:19:51,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699363463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:51,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443218226] [2021-06-12 22:19:51,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:51,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 22:19:51,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:51,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 22:19:51,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:51,852 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:51,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443218226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:51,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:51,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-12 22:19:51,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304181287] [2021-06-12 22:19:51,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 22:19:51,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:51,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 22:19:51,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:19:51,853 INFO L87 Difference]: Start difference. First operand 3124 states and 7345 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:55,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:55,564 INFO L93 Difference]: Finished difference Result 4367 states and 10055 transitions. [2021-06-12 22:19:55,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-12 22:19:55,564 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:19:55,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:55,568 INFO L225 Difference]: With dead ends: 4367 [2021-06-12 22:19:55,568 INFO L226 Difference]: Without dead ends: 4331 [2021-06-12 22:19:55,569 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3566 ImplicationChecksByTransitivity, 3629.8ms TimeCoverageRelationStatistics Valid=1380, Invalid=9126, Unknown=0, NotChecked=0, Total=10506 [2021-06-12 22:19:55,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4331 states. [2021-06-12 22:19:55,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4331 to 3128. [2021-06-12 22:19:55,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3128 states, 3127 states have (on average 2.351455068755996) internal successors, (7353), 3127 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:55,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 7353 transitions. [2021-06-12 22:19:55,603 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 7353 transitions. Word has length 35 [2021-06-12 22:19:55,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:55,603 INFO L482 AbstractCegarLoop]: Abstraction has 3128 states and 7353 transitions. [2021-06-12 22:19:55,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:55,603 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 7353 transitions. [2021-06-12 22:19:55,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:19:55,606 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:55,606 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:55,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1195,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:55,807 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:55,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:55,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1493850169, now seen corresponding path program 84 times [2021-06-12 22:19:55,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:55,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114953958] [2021-06-12 22:19:55,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:55,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:56,073 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:56,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:56,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114953958] [2021-06-12 22:19:56,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114953958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:56,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504763564] [2021-06-12 22:19:56,073 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:56,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:19:56,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:56,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 22:19:56,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:56,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504763564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:56,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:56,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-12 22:19:56,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782065019] [2021-06-12 22:19:56,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 22:19:56,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:56,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 22:19:56,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:19:56,668 INFO L87 Difference]: Start difference. First operand 3128 states and 7353 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:01,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:01,759 INFO L93 Difference]: Finished difference Result 4790 states and 10902 transitions. [2021-06-12 22:20:01,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-12 22:20:01,760 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:20:01,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:01,764 INFO L225 Difference]: With dead ends: 4790 [2021-06-12 22:20:01,764 INFO L226 Difference]: Without dead ends: 4748 [2021-06-12 22:20:01,765 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6035 ImplicationChecksByTransitivity, 4832.5ms TimeCoverageRelationStatistics Valid=2422, Invalid=14090, Unknown=0, NotChecked=0, Total=16512 [2021-06-12 22:20:01,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4748 states. [2021-06-12 22:20:01,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4748 to 3140. [2021-06-12 22:20:01,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3140 states, 3139 states have (on average 2.352341510035043) internal successors, (7384), 3139 states have internal predecessors, (7384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:01,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 7384 transitions. [2021-06-12 22:20:01,800 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 7384 transitions. Word has length 35 [2021-06-12 22:20:01,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:01,800 INFO L482 AbstractCegarLoop]: Abstraction has 3140 states and 7384 transitions. [2021-06-12 22:20:01,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:01,800 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 7384 transitions. [2021-06-12 22:20:01,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:20:01,803 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:01,803 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:02,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1217 [2021-06-12 22:20:02,004 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:02,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:02,004 INFO L82 PathProgramCache]: Analyzing trace with hash 2094563453, now seen corresponding path program 85 times [2021-06-12 22:20:02,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:02,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205524922] [2021-06-12 22:20:02,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:02,190 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:20:02,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:02,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205524922] [2021-06-12 22:20:02,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205524922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:02,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057808788] [2021-06-12 22:20:02,190 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:02,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:02,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:20:02,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:02,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057808788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:02,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:02,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-12 22:20:02,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142491751] [2021-06-12 22:20:02,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 22:20:02,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:02,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 22:20:02,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:20:02,697 INFO L87 Difference]: Start difference. First operand 3140 states and 7384 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:04,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:04,765 INFO L93 Difference]: Finished difference Result 3894 states and 8946 transitions. [2021-06-12 22:20:04,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 22:20:04,765 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:20:04,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:04,769 INFO L225 Difference]: With dead ends: 3894 [2021-06-12 22:20:04,769 INFO L226 Difference]: Without dead ends: 3894 [2021-06-12 22:20:04,770 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1440 ImplicationChecksByTransitivity, 1964.7ms TimeCoverageRelationStatistics Valid=1006, Invalid=4396, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 22:20:04,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3894 states. [2021-06-12 22:20:04,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3894 to 3148. [2021-06-12 22:20:04,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3148 states, 3147 states have (on average 2.3511280584683827) internal successors, (7399), 3147 states have internal predecessors, (7399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:04,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3148 states to 3148 states and 7399 transitions. [2021-06-12 22:20:04,808 INFO L78 Accepts]: Start accepts. Automaton has 3148 states and 7399 transitions. Word has length 35 [2021-06-12 22:20:04,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:04,808 INFO L482 AbstractCegarLoop]: Abstraction has 3148 states and 7399 transitions. [2021-06-12 22:20:04,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:04,808 INFO L276 IsEmpty]: Start isEmpty. Operand 3148 states and 7399 transitions. [2021-06-12 22:20:04,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:20:04,811 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:04,811 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:05,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1235 [2021-06-12 22:20:05,011 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:05,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:05,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1577622011, now seen corresponding path program 86 times [2021-06-12 22:20:05,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:05,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276901237] [2021-06-12 22:20:05,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:05,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:05,209 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:05,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:05,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276901237] [2021-06-12 22:20:05,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276901237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:05,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237091793] [2021-06-12 22:20:05,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:05,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:20:05,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:05,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:20:05,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:05,619 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:05,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237091793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:05,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:05,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-12 22:20:05,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257190764] [2021-06-12 22:20:05,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 22:20:05,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:05,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 22:20:05,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:20:05,620 INFO L87 Difference]: Start difference. First operand 3148 states and 7399 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:07,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:07,557 INFO L93 Difference]: Finished difference Result 4657 states and 10723 transitions. [2021-06-12 22:20:07,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:20:07,557 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:20:07,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:07,561 INFO L225 Difference]: With dead ends: 4657 [2021-06-12 22:20:07,561 INFO L226 Difference]: Without dead ends: 4654 [2021-06-12 22:20:07,561 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 1797.4ms TimeCoverageRelationStatistics Valid=896, Invalid=4216, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 22:20:07,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4654 states. [2021-06-12 22:20:07,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4654 to 3187. [2021-06-12 22:20:07,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3187 states, 3186 states have (on average 2.349968612680477) internal successors, (7487), 3186 states have internal predecessors, (7487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:07,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3187 states to 3187 states and 7487 transitions. [2021-06-12 22:20:07,593 INFO L78 Accepts]: Start accepts. Automaton has 3187 states and 7487 transitions. Word has length 35 [2021-06-12 22:20:07,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:07,593 INFO L482 AbstractCegarLoop]: Abstraction has 3187 states and 7487 transitions. [2021-06-12 22:20:07,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:07,593 INFO L276 IsEmpty]: Start isEmpty. Operand 3187 states and 7487 transitions. [2021-06-12 22:20:07,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:20:07,595 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:07,595 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:07,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1257 [2021-06-12 22:20:07,797 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:07,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:07,797 INFO L82 PathProgramCache]: Analyzing trace with hash -2070250695, now seen corresponding path program 87 times [2021-06-12 22:20:07,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:07,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522229153] [2021-06-12 22:20:07,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:07,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:07,937 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:07,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:07,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522229153] [2021-06-12 22:20:07,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522229153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:07,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382104024] [2021-06-12 22:20:07,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:07,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 22:20:07,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:07,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 22:20:07,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:08,397 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:08,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382104024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:08,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:08,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-12 22:20:08,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575985429] [2021-06-12 22:20:08,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 22:20:08,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:08,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 22:20:08,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:20:08,398 INFO L87 Difference]: Start difference. First operand 3187 states and 7487 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:10,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:10,038 INFO L93 Difference]: Finished difference Result 5710 states and 13179 transitions. [2021-06-12 22:20:10,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 22:20:10,039 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:20:10,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:10,043 INFO L225 Difference]: With dead ends: 5710 [2021-06-12 22:20:10,043 INFO L226 Difference]: Without dead ends: 5686 [2021-06-12 22:20:10,044 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 1494.4ms TimeCoverageRelationStatistics Valid=857, Invalid=3835, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 22:20:10,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2021-06-12 22:20:10,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 4202. [2021-06-12 22:20:10,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4202 states, 4201 states have (on average 2.379909545346346) internal successors, (9998), 4201 states have internal predecessors, (9998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:10,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4202 states to 4202 states and 9998 transitions. [2021-06-12 22:20:10,085 INFO L78 Accepts]: Start accepts. Automaton has 4202 states and 9998 transitions. Word has length 35 [2021-06-12 22:20:10,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:10,085 INFO L482 AbstractCegarLoop]: Abstraction has 4202 states and 9998 transitions. [2021-06-12 22:20:10,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:10,085 INFO L276 IsEmpty]: Start isEmpty. Operand 4202 states and 9998 transitions. [2021-06-12 22:20:10,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:20:10,088 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:10,089 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:10,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1276 [2021-06-12 22:20:10,289 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:10,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:10,289 INFO L82 PathProgramCache]: Analyzing trace with hash 739863609, now seen corresponding path program 88 times [2021-06-12 22:20:10,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:10,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60473484] [2021-06-12 22:20:10,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:10,536 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:10,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:10,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60473484] [2021-06-12 22:20:10,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60473484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:10,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585233722] [2021-06-12 22:20:10,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:10,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:20:10,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:10,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 22:20:10,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:11,232 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:11,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585233722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:11,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:11,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-12 22:20:11,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597993748] [2021-06-12 22:20:11,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 22:20:11,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:11,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 22:20:11,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:20:11,233 INFO L87 Difference]: Start difference. First operand 4202 states and 9998 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:15,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:15,281 INFO L93 Difference]: Finished difference Result 7108 states and 16347 transitions. [2021-06-12 22:20:15,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-12 22:20:15,281 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:20:15,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:15,287 INFO L225 Difference]: With dead ends: 7108 [2021-06-12 22:20:15,287 INFO L226 Difference]: Without dead ends: 7017 [2021-06-12 22:20:15,287 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4316 ImplicationChecksByTransitivity, 3655.4ms TimeCoverageRelationStatistics Valid=1552, Invalid=10658, Unknown=0, NotChecked=0, Total=12210 [2021-06-12 22:20:15,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7017 states. [2021-06-12 22:20:15,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7017 to 4409. [2021-06-12 22:20:15,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 4408 states have (on average 2.3940562613430125) internal successors, (10553), 4408 states have internal predecessors, (10553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:15,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 10553 transitions. [2021-06-12 22:20:15,342 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 10553 transitions. Word has length 35 [2021-06-12 22:20:15,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:15,342 INFO L482 AbstractCegarLoop]: Abstraction has 4409 states and 10553 transitions. [2021-06-12 22:20:15,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:15,343 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 10553 transitions. [2021-06-12 22:20:15,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:20:15,346 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:15,346 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:15,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1293,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:15,547 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:15,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:15,547 INFO L82 PathProgramCache]: Analyzing trace with hash -179807687, now seen corresponding path program 89 times [2021-06-12 22:20:15,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:15,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519422913] [2021-06-12 22:20:15,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:15,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:15,744 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:15,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:15,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519422913] [2021-06-12 22:20:15,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519422913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:15,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594289302] [2021-06-12 22:20:15,745 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:15,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 22:20:15,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:15,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:20:15,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:16,131 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:16,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594289302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:16,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:16,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2021-06-12 22:20:16,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383628045] [2021-06-12 22:20:16,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 22:20:16,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:16,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 22:20:16,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:20:16,132 INFO L87 Difference]: Start difference. First operand 4409 states and 10553 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:20,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:20,436 INFO L93 Difference]: Finished difference Result 6487 states and 15070 transitions. [2021-06-12 22:20:20,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-12 22:20:20,436 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:20:20,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:20,441 INFO L225 Difference]: With dead ends: 6487 [2021-06-12 22:20:20,441 INFO L226 Difference]: Without dead ends: 6433 [2021-06-12 22:20:20,442 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3538 ImplicationChecksByTransitivity, 3752.9ms TimeCoverageRelationStatistics Valid=1209, Invalid=10347, Unknown=0, NotChecked=0, Total=11556 [2021-06-12 22:20:20,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6433 states. [2021-06-12 22:20:20,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6433 to 4475. [2021-06-12 22:20:20,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4475 states, 4474 states have (on average 2.388913723737148) internal successors, (10688), 4474 states have internal predecessors, (10688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:20,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4475 states to 4475 states and 10688 transitions. [2021-06-12 22:20:20,495 INFO L78 Accepts]: Start accepts. Automaton has 4475 states and 10688 transitions. Word has length 35 [2021-06-12 22:20:20,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:20,495 INFO L482 AbstractCegarLoop]: Abstraction has 4475 states and 10688 transitions. [2021-06-12 22:20:20,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:20,495 INFO L276 IsEmpty]: Start isEmpty. Operand 4475 states and 10688 transitions. [2021-06-12 22:20:20,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:20:20,499 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:20,499 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:20,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1316,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:20,705 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:20,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:20,705 INFO L82 PathProgramCache]: Analyzing trace with hash -724083655, now seen corresponding path program 90 times [2021-06-12 22:20:20,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:20,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915434420] [2021-06-12 22:20:20,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:20,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:20,848 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:20:20,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:20,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915434420] [2021-06-12 22:20:20,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915434420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:20,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089413599] [2021-06-12 22:20:20,849 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:20,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 22:20:20,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:20,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:20:20,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:21,231 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:21,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089413599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:21,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:21,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-12 22:20:21,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994541980] [2021-06-12 22:20:21,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 22:20:21,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:21,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 22:20:21,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:20:21,232 INFO L87 Difference]: Start difference. First operand 4475 states and 10688 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:22,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:22,615 INFO L93 Difference]: Finished difference Result 6393 states and 14863 transitions. [2021-06-12 22:20:22,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 22:20:22,616 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:20:22,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:22,622 INFO L225 Difference]: With dead ends: 6393 [2021-06-12 22:20:22,622 INFO L226 Difference]: Without dead ends: 6357 [2021-06-12 22:20:22,623 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 1259.0ms TimeCoverageRelationStatistics Valid=825, Invalid=3465, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 22:20:22,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6357 states. [2021-06-12 22:20:22,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6357 to 4465. [2021-06-12 22:20:22,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4465 states, 4464 states have (on average 2.3875448028673834) internal successors, (10658), 4464 states have internal predecessors, (10658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:22,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4465 states to 4465 states and 10658 transitions. [2021-06-12 22:20:22,707 INFO L78 Accepts]: Start accepts. Automaton has 4465 states and 10658 transitions. Word has length 35 [2021-06-12 22:20:22,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:22,707 INFO L482 AbstractCegarLoop]: Abstraction has 4465 states and 10658 transitions. [2021-06-12 22:20:22,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:22,708 INFO L276 IsEmpty]: Start isEmpty. Operand 4465 states and 10658 transitions. [2021-06-12 22:20:22,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:20:22,711 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:22,711 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:22,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1325 [2021-06-12 22:20:22,911 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:22,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:22,912 INFO L82 PathProgramCache]: Analyzing trace with hash 756997177, now seen corresponding path program 91 times [2021-06-12 22:20:22,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:22,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784266918] [2021-06-12 22:20:22,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:22,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:23,081 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:23,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:23,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784266918] [2021-06-12 22:20:23,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784266918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:23,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976716402] [2021-06-12 22:20:23,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:20:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:23,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 22:20:23,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:23,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976716402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:23,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:23,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-12 22:20:23,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175371828] [2021-06-12 22:20:23,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 22:20:23,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:23,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 22:20:23,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:20:23,557 INFO L87 Difference]: Start difference. First operand 4465 states and 10658 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:24,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:24,772 INFO L93 Difference]: Finished difference Result 5425 states and 12731 transitions. [2021-06-12 22:20:24,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 22:20:24,773 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:20:24,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:24,778 INFO L225 Difference]: With dead ends: 5425 [2021-06-12 22:20:24,778 INFO L226 Difference]: Without dead ends: 5407 [2021-06-12 22:20:24,778 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 1244.6ms TimeCoverageRelationStatistics Valid=797, Invalid=3363, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 22:20:24,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5407 states. [2021-06-12 22:20:24,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5407 to 4211. [2021-06-12 22:20:24,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4211 states, 4210 states have (on average 2.3767220902612824) internal successors, (10006), 4210 states have internal predecessors, (10006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:24,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4211 states to 4211 states and 10006 transitions. [2021-06-12 22:20:24,819 INFO L78 Accepts]: Start accepts. Automaton has 4211 states and 10006 transitions. Word has length 35 [2021-06-12 22:20:24,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:24,819 INFO L482 AbstractCegarLoop]: Abstraction has 4211 states and 10006 transitions. [2021-06-12 22:20:24,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:24,819 INFO L276 IsEmpty]: Start isEmpty. Operand 4211 states and 10006 transitions. [2021-06-12 22:20:24,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:20:24,822 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:24,822 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:25,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1340,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:25,023 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:25,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:25,023 INFO L82 PathProgramCache]: Analyzing trace with hash 938061735, now seen corresponding path program 92 times [2021-06-12 22:20:25,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:25,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222974125] [2021-06-12 22:20:25,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:25,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:25,164 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:25,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:25,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222974125] [2021-06-12 22:20:25,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222974125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:25,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875879150] [2021-06-12 22:20:25,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:25,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:20:25,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:25,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:20:25,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:25,589 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:25,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875879150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:25,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:25,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-06-12 22:20:25,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736081757] [2021-06-12 22:20:25,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 22:20:25,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:25,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 22:20:25,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:20:25,591 INFO L87 Difference]: Start difference. First operand 4211 states and 10006 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:26,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:26,484 INFO L93 Difference]: Finished difference Result 4658 states and 10935 transitions. [2021-06-12 22:20:26,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:20:26,485 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:20:26,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:26,488 INFO L225 Difference]: With dead ends: 4658 [2021-06-12 22:20:26,488 INFO L226 Difference]: Without dead ends: 4654 [2021-06-12 22:20:26,489 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 978.7ms TimeCoverageRelationStatistics Valid=548, Invalid=2644, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:20:26,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4654 states. [2021-06-12 22:20:26,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4654 to 4228. [2021-06-12 22:20:26,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.3763898746155667) internal successors, (10045), 4227 states have internal predecessors, (10045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:26,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 10045 transitions. [2021-06-12 22:20:26,537 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 10045 transitions. Word has length 35 [2021-06-12 22:20:26,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:26,537 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 10045 transitions. [2021-06-12 22:20:26,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:26,537 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 10045 transitions. [2021-06-12 22:20:26,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:20:26,539 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:26,540 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:26,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1363 [2021-06-12 22:20:26,740 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:26,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:26,741 INFO L82 PathProgramCache]: Analyzing trace with hash -817736003, now seen corresponding path program 93 times [2021-06-12 22:20:26,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:26,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070292623] [2021-06-12 22:20:26,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:26,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:27,003 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:27,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:27,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070292623] [2021-06-12 22:20:27,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070292623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:27,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411506896] [2021-06-12 22:20:27,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:27,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:20:27,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:27,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 22:20:27,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:27,638 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:27,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411506896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:27,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:27,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-12 22:20:27,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410751888] [2021-06-12 22:20:27,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 22:20:27,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:27,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 22:20:27,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:20:27,639 INFO L87 Difference]: Start difference. First operand 4228 states and 10045 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:33,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:33,314 INFO L93 Difference]: Finished difference Result 7630 states and 17556 transitions. [2021-06-12 22:20:33,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-12 22:20:33,314 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:20:33,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:33,322 INFO L225 Difference]: With dead ends: 7630 [2021-06-12 22:20:33,323 INFO L226 Difference]: Without dead ends: 7551 [2021-06-12 22:20:33,323 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7268 ImplicationChecksByTransitivity, 5050.1ms TimeCoverageRelationStatistics Valid=2403, Invalid=16779, Unknown=0, NotChecked=0, Total=19182 [2021-06-12 22:20:33,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7551 states. [2021-06-12 22:20:33,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7551 to 4786. [2021-06-12 22:20:33,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4786 states, 4785 states have (on average 2.400208986415883) internal successors, (11485), 4785 states have internal predecessors, (11485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:33,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4786 states to 4786 states and 11485 transitions. [2021-06-12 22:20:33,385 INFO L78 Accepts]: Start accepts. Automaton has 4786 states and 11485 transitions. Word has length 35 [2021-06-12 22:20:33,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:33,385 INFO L482 AbstractCegarLoop]: Abstraction has 4786 states and 11485 transitions. [2021-06-12 22:20:33,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:33,385 INFO L276 IsEmpty]: Start isEmpty. Operand 4786 states and 11485 transitions. [2021-06-12 22:20:33,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:20:33,389 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:33,389 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:33,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1383,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:33,589 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:33,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:33,590 INFO L82 PathProgramCache]: Analyzing trace with hash -756933699, now seen corresponding path program 94 times [2021-06-12 22:20:33,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:33,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158827585] [2021-06-12 22:20:33,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:33,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:33,822 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:33,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:33,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158827585] [2021-06-12 22:20:33,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158827585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:33,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924214995] [2021-06-12 22:20:33,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:33,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:20:33,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:33,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 22:20:33,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:34,462 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:34,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924214995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:34,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:34,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-06-12 22:20:34,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721267006] [2021-06-12 22:20:34,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 22:20:34,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:34,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 22:20:34,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:20:34,463 INFO L87 Difference]: Start difference. First operand 4786 states and 11485 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:39,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:39,466 INFO L93 Difference]: Finished difference Result 7197 states and 16708 transitions. [2021-06-12 22:20:39,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-06-12 22:20:39,466 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:20:39,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:39,473 INFO L225 Difference]: With dead ends: 7197 [2021-06-12 22:20:39,473 INFO L226 Difference]: Without dead ends: 7141 [2021-06-12 22:20:39,474 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4854 ImplicationChecksByTransitivity, 4590.0ms TimeCoverageRelationStatistics Valid=1899, Invalid=12143, Unknown=0, NotChecked=0, Total=14042 [2021-06-12 22:20:39,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7141 states. [2021-06-12 22:20:39,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7141 to 4905. [2021-06-12 22:20:39,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4905 states, 4904 states have (on average 2.4074225122349104) internal successors, (11806), 4904 states have internal predecessors, (11806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:39,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4905 states to 4905 states and 11806 transitions. [2021-06-12 22:20:39,530 INFO L78 Accepts]: Start accepts. Automaton has 4905 states and 11806 transitions. Word has length 35 [2021-06-12 22:20:39,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:39,530 INFO L482 AbstractCegarLoop]: Abstraction has 4905 states and 11806 transitions. [2021-06-12 22:20:39,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:39,530 INFO L276 IsEmpty]: Start isEmpty. Operand 4905 states and 11806 transitions. [2021-06-12 22:20:39,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:20:39,534 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:39,534 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:39,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1405,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:39,750 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:39,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:39,751 INFO L82 PathProgramCache]: Analyzing trace with hash -156220415, now seen corresponding path program 95 times [2021-06-12 22:20:39,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:39,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375036424] [2021-06-12 22:20:39,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:39,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:40,017 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:20:40,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:40,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375036424] [2021-06-12 22:20:40,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375036424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:40,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455642592] [2021-06-12 22:20:40,018 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:40,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 22:20:40,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:40,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 22:20:40,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:40,521 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:40,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455642592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:40,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:40,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-12 22:20:40,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742788047] [2021-06-12 22:20:40,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 22:20:40,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:40,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 22:20:40,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:20:40,522 INFO L87 Difference]: Start difference. First operand 4905 states and 11806 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:42,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:42,588 INFO L93 Difference]: Finished difference Result 6702 states and 15725 transitions. [2021-06-12 22:20:42,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 22:20:42,588 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:20:42,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:42,593 INFO L225 Difference]: With dead ends: 6702 [2021-06-12 22:20:42,593 INFO L226 Difference]: Without dead ends: 6678 [2021-06-12 22:20:42,594 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 2109.0ms TimeCoverageRelationStatistics Valid=1165, Invalid=4997, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 22:20:42,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6678 states. [2021-06-12 22:20:42,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6678 to 3663. [2021-06-12 22:20:42,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3663 states, 3662 states have (on average 2.367012561441835) internal successors, (8668), 3662 states have internal predecessors, (8668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:42,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3663 states to 3663 states and 8668 transitions. [2021-06-12 22:20:42,635 INFO L78 Accepts]: Start accepts. Automaton has 3663 states and 8668 transitions. Word has length 35 [2021-06-12 22:20:42,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:42,635 INFO L482 AbstractCegarLoop]: Abstraction has 3663 states and 8668 transitions. [2021-06-12 22:20:42,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:42,635 INFO L276 IsEmpty]: Start isEmpty. Operand 3663 states and 8668 transitions. [2021-06-12 22:20:42,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:20:42,638 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:42,638 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:42,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1425,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:42,838 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:42,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:42,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1416553917, now seen corresponding path program 96 times [2021-06-12 22:20:42,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:42,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897336694] [2021-06-12 22:20:42,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:42,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:43,080 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:20:43,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:43,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897336694] [2021-06-12 22:20:43,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897336694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:43,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671409524] [2021-06-12 22:20:43,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:43,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:20:43,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:43,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 22:20:43,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:43,732 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:43,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671409524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:43,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:43,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-12 22:20:43,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672481671] [2021-06-12 22:20:43,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 22:20:43,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:43,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 22:20:43,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:20:43,733 INFO L87 Difference]: Start difference. First operand 3663 states and 8668 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:46,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:46,938 INFO L93 Difference]: Finished difference Result 5512 states and 12685 transitions. [2021-06-12 22:20:46,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 22:20:46,939 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:20:46,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:46,943 INFO L225 Difference]: With dead ends: 5512 [2021-06-12 22:20:46,944 INFO L226 Difference]: Without dead ends: 5461 [2021-06-12 22:20:46,944 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2673 ImplicationChecksByTransitivity, 3220.8ms TimeCoverageRelationStatistics Valid=1101, Invalid=7089, Unknown=0, NotChecked=0, Total=8190 [2021-06-12 22:20:46,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5461 states. [2021-06-12 22:20:46,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5461 to 3678. [2021-06-12 22:20:46,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3678 states, 3677 states have (on average 2.361435953222736) internal successors, (8683), 3677 states have internal predecessors, (8683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:46,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3678 states to 3678 states and 8683 transitions. [2021-06-12 22:20:46,982 INFO L78 Accepts]: Start accepts. Automaton has 3678 states and 8683 transitions. Word has length 35 [2021-06-12 22:20:46,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:46,982 INFO L482 AbstractCegarLoop]: Abstraction has 3678 states and 8683 transitions. [2021-06-12 22:20:46,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:46,982 INFO L276 IsEmpty]: Start isEmpty. Operand 3678 states and 8683 transitions. [2021-06-12 22:20:46,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 22:20:46,984 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:46,985 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:47,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1439 [2021-06-12 22:20:47,185 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:47,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:47,185 INFO L82 PathProgramCache]: Analyzing trace with hash -756433177, now seen corresponding path program 97 times [2021-06-12 22:20:47,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:47,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473180342] [2021-06-12 22:20:47,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:47,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:47,315 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:47,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:47,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473180342] [2021-06-12 22:20:47,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473180342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:47,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518483209] [2021-06-12 22:20:47,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:47,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:47,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 22:20:47,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:47,821 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:47,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518483209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:47,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:47,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-06-12 22:20:47,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623442324] [2021-06-12 22:20:47,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 22:20:47,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:47,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 22:20:47,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:20:47,822 INFO L87 Difference]: Start difference. First operand 3678 states and 8683 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:49,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:49,383 INFO L93 Difference]: Finished difference Result 4687 states and 10833 transitions. [2021-06-12 22:20:49,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 22:20:49,384 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-12 22:20:49,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:49,388 INFO L225 Difference]: With dead ends: 4687 [2021-06-12 22:20:49,388 INFO L226 Difference]: Without dead ends: 4675 [2021-06-12 22:20:49,389 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 1397.6ms TimeCoverageRelationStatistics Valid=697, Invalid=3335, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 22:20:49,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4675 states. [2021-06-12 22:20:49,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4675 to 3716. [2021-06-12 22:20:49,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 3715 states have (on average 2.364199192462988) internal successors, (8783), 3715 states have internal predecessors, (8783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:49,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 8783 transitions. [2021-06-12 22:20:49,437 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 8783 transitions. Word has length 35 [2021-06-12 22:20:49,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:49,437 INFO L482 AbstractCegarLoop]: Abstraction has 3716 states and 8783 transitions. [2021-06-12 22:20:49,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:49,437 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 8783 transitions. [2021-06-12 22:20:49,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:20:49,440 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:49,440 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:49,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1458 [2021-06-12 22:20:49,656 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:49,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:49,656 INFO L82 PathProgramCache]: Analyzing trace with hash -869656803, now seen corresponding path program 98 times [2021-06-12 22:20:49,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:49,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906556563] [2021-06-12 22:20:49,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:49,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:49,769 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:49,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:49,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906556563] [2021-06-12 22:20:49,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906556563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:49,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841942353] [2021-06-12 22:20:49,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:49,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:20:49,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:49,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 22:20:49,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:50,046 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:50,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841942353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:50,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:50,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-12 22:20:50,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038614013] [2021-06-12 22:20:50,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 22:20:50,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:50,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 22:20:50,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:20:50,047 INFO L87 Difference]: Start difference. First operand 3716 states and 8783 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:51,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:51,352 INFO L93 Difference]: Finished difference Result 5434 states and 12387 transitions. [2021-06-12 22:20:51,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 22:20:51,352 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:20:51,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:51,357 INFO L225 Difference]: With dead ends: 5434 [2021-06-12 22:20:51,357 INFO L226 Difference]: Without dead ends: 5434 [2021-06-12 22:20:51,357 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2268 ImplicationChecksByTransitivity, 1199.1ms TimeCoverageRelationStatistics Valid=2085, Invalid=5925, Unknown=0, NotChecked=0, Total=8010 [2021-06-12 22:20:51,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5434 states. [2021-06-12 22:20:51,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5434 to 4658. [2021-06-12 22:20:51,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4658 states, 4657 states have (on average 2.3474339703671894) internal successors, (10932), 4657 states have internal predecessors, (10932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:51,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4658 states to 4658 states and 10932 transitions. [2021-06-12 22:20:51,400 INFO L78 Accepts]: Start accepts. Automaton has 4658 states and 10932 transitions. Word has length 37 [2021-06-12 22:20:51,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:51,400 INFO L482 AbstractCegarLoop]: Abstraction has 4658 states and 10932 transitions. [2021-06-12 22:20:51,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:51,400 INFO L276 IsEmpty]: Start isEmpty. Operand 4658 states and 10932 transitions. [2021-06-12 22:20:51,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:20:51,404 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:51,404 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:51,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1473,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:51,604 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:51,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:51,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1373714529, now seen corresponding path program 99 times [2021-06-12 22:20:51,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:51,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315132580] [2021-06-12 22:20:51,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:51,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:51,663 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:51,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:51,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315132580] [2021-06-12 22:20:51,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315132580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:51,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121046248] [2021-06-12 22:20:51,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:51,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 22:20:51,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:51,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 22:20:51,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:51,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121046248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:51,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:51,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 24 [2021-06-12 22:20:51,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329466653] [2021-06-12 22:20:51,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 22:20:51,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:51,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 22:20:51,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:20:51,926 INFO L87 Difference]: Start difference. First operand 4658 states and 10932 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:54,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:54,010 INFO L93 Difference]: Finished difference Result 5175 states and 11919 transitions. [2021-06-12 22:20:54,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-12 22:20:54,011 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:20:54,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:54,015 INFO L225 Difference]: With dead ends: 5175 [2021-06-12 22:20:54,015 INFO L226 Difference]: Without dead ends: 5171 [2021-06-12 22:20:54,016 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4929 ImplicationChecksByTransitivity, 1933.0ms TimeCoverageRelationStatistics Valid=3112, Invalid=10228, Unknown=0, NotChecked=0, Total=13340 [2021-06-12 22:20:54,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5171 states. [2021-06-12 22:20:54,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5171 to 4602. [2021-06-12 22:20:54,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4602 states, 4601 states have (on average 2.344925016300804) internal successors, (10789), 4601 states have internal predecessors, (10789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:54,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4602 states to 4602 states and 10789 transitions. [2021-06-12 22:20:54,059 INFO L78 Accepts]: Start accepts. Automaton has 4602 states and 10789 transitions. Word has length 37 [2021-06-12 22:20:54,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:54,059 INFO L482 AbstractCegarLoop]: Abstraction has 4602 states and 10789 transitions. [2021-06-12 22:20:54,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:54,059 INFO L276 IsEmpty]: Start isEmpty. Operand 4602 states and 10789 transitions. [2021-06-12 22:20:54,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:20:54,063 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:54,063 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:54,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1482,100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:54,263 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:54,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:54,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1156107053, now seen corresponding path program 100 times [2021-06-12 22:20:54,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:54,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776867842] [2021-06-12 22:20:54,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:54,676 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:54,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:54,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776867842] [2021-06-12 22:20:54,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776867842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:54,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852436119] [2021-06-12 22:20:54,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:54,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:20:54,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:54,700 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 54 conjunts are in the unsatisfiable core [2021-06-12 22:20:54,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:55,437 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:55,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852436119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:55,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:55,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2021-06-12 22:20:55,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022399005] [2021-06-12 22:20:55,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 22:20:55,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:55,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 22:20:55,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1131, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:20:55,438 INFO L87 Difference]: Start difference. First operand 4602 states and 10789 transitions. Second operand has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:56,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:56,851 INFO L93 Difference]: Finished difference Result 5204 states and 12036 transitions. [2021-06-12 22:20:56,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:20:56,851 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:20:56,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:56,855 INFO L225 Difference]: With dead ends: 5204 [2021-06-12 22:20:56,855 INFO L226 Difference]: Without dead ends: 5150 [2021-06-12 22:20:56,856 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1825.0ms TimeCoverageRelationStatistics Valid=371, Invalid=3051, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:20:56,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5150 states. [2021-06-12 22:20:56,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5150 to 4618. [2021-06-12 22:20:56,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4618 states, 4617 states have (on average 2.342863331167425) internal successors, (10817), 4617 states have internal predecessors, (10817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:56,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4618 states to 4618 states and 10817 transitions. [2021-06-12 22:20:56,897 INFO L78 Accepts]: Start accepts. Automaton has 4618 states and 10817 transitions. Word has length 37 [2021-06-12 22:20:56,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:56,897 INFO L482 AbstractCegarLoop]: Abstraction has 4618 states and 10817 transitions. [2021-06-12 22:20:56,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8888888888888888) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:56,897 INFO L276 IsEmpty]: Start isEmpty. Operand 4618 states and 10817 transitions. [2021-06-12 22:20:56,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:20:56,900 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:56,900 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:57,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1490,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:57,113 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:57,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:57,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1012654923, now seen corresponding path program 101 times [2021-06-12 22:20:57,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:57,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852029341] [2021-06-12 22:20:57,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:57,342 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:57,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:57,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852029341] [2021-06-12 22:20:57,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852029341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:57,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608646064] [2021-06-12 22:20:57,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:57,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 22:20:57,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:57,367 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 22:20:57,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:57,979 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:57,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608646064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:57,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:57,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2021-06-12 22:20:57,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763349332] [2021-06-12 22:20:57,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 22:20:57,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:57,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 22:20:57,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1268, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 22:20:57,980 INFO L87 Difference]: Start difference. First operand 4618 states and 10817 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:00,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:00,767 INFO L93 Difference]: Finished difference Result 5242 states and 12110 transitions. [2021-06-12 22:21:00,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 22:21:00,767 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:21:00,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:00,772 INFO L225 Difference]: With dead ends: 5242 [2021-06-12 22:21:00,772 INFO L226 Difference]: Without dead ends: 5242 [2021-06-12 22:21:00,772 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2412 ImplicationChecksByTransitivity, 2562.4ms TimeCoverageRelationStatistics Valid=966, Invalid=7406, Unknown=0, NotChecked=0, Total=8372 [2021-06-12 22:21:00,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5242 states. [2021-06-12 22:21:00,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5242 to 4659. [2021-06-12 22:21:00,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 4658 states have (on average 2.343924431086303) internal successors, (10918), 4658 states have internal predecessors, (10918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:00,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 10918 transitions. [2021-06-12 22:21:00,817 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 10918 transitions. Word has length 37 [2021-06-12 22:21:00,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:00,817 INFO L482 AbstractCegarLoop]: Abstraction has 4659 states and 10918 transitions. [2021-06-12 22:21:00,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:00,817 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 10918 transitions. [2021-06-12 22:21:00,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:21:00,820 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:00,821 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:01,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1513 [2021-06-12 22:21:01,022 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:01,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:01,022 INFO L82 PathProgramCache]: Analyzing trace with hash -376851599, now seen corresponding path program 102 times [2021-06-12 22:21:01,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:01,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002283131] [2021-06-12 22:21:01,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:01,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:01,278 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:01,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:01,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002283131] [2021-06-12 22:21:01,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002283131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:01,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780067277] [2021-06-12 22:21:01,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:01,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:21:01,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:01,312 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:21:01,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:02,059 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:02,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780067277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:02,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:02,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-12 22:21:02,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343487883] [2021-06-12 22:21:02,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 22:21:02,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:02,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 22:21:02,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1214, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:21:02,060 INFO L87 Difference]: Start difference. First operand 4659 states and 10918 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:04,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:04,635 INFO L93 Difference]: Finished difference Result 5461 states and 12630 transitions. [2021-06-12 22:21:04,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 22:21:04,636 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:21:04,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:04,650 INFO L225 Difference]: With dead ends: 5461 [2021-06-12 22:21:04,651 INFO L226 Difference]: Without dead ends: 5461 [2021-06-12 22:21:04,651 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1750 ImplicationChecksByTransitivity, 2589.7ms TimeCoverageRelationStatistics Valid=635, Invalid=5845, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 22:21:04,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5461 states. [2021-06-12 22:21:04,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5461 to 4679. [2021-06-12 22:21:04,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4679 states, 4678 states have (on average 2.344164172723386) internal successors, (10966), 4678 states have internal predecessors, (10966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:04,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4679 states to 4679 states and 10966 transitions. [2021-06-12 22:21:04,692 INFO L78 Accepts]: Start accepts. Automaton has 4679 states and 10966 transitions. Word has length 37 [2021-06-12 22:21:04,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:04,692 INFO L482 AbstractCegarLoop]: Abstraction has 4679 states and 10966 transitions. [2021-06-12 22:21:04,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:04,692 INFO L276 IsEmpty]: Start isEmpty. Operand 4679 states and 10966 transitions. [2021-06-12 22:21:04,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:21:04,696 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:04,696 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:04,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1532,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:04,896 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:04,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:04,897 INFO L82 PathProgramCache]: Analyzing trace with hash 719191221, now seen corresponding path program 103 times [2021-06-12 22:21:04,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:04,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591617193] [2021-06-12 22:21:04,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:05,132 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:05,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:05,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591617193] [2021-06-12 22:21:05,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591617193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:05,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125298072] [2021-06-12 22:21:05,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:05,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-12 22:21:05,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:05,801 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:05,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125298072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:05,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:05,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-12 22:21:05,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441511204] [2021-06-12 22:21:05,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 22:21:05,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:05,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 22:21:05,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1207, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:21:05,802 INFO L87 Difference]: Start difference. First operand 4679 states and 10966 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:08,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:08,554 INFO L93 Difference]: Finished difference Result 5286 states and 12264 transitions. [2021-06-12 22:21:08,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 22:21:08,554 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:21:08,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:08,558 INFO L225 Difference]: With dead ends: 5286 [2021-06-12 22:21:08,558 INFO L226 Difference]: Without dead ends: 5286 [2021-06-12 22:21:08,558 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 2489.9ms TimeCoverageRelationStatistics Valid=699, Invalid=6273, Unknown=0, NotChecked=0, Total=6972 [2021-06-12 22:21:08,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5286 states. [2021-06-12 22:21:08,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5286 to 4683. [2021-06-12 22:21:08,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4683 states, 4682 states have (on average 2.344724476719351) internal successors, (10978), 4682 states have internal predecessors, (10978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:08,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4683 states to 4683 states and 10978 transitions. [2021-06-12 22:21:08,602 INFO L78 Accepts]: Start accepts. Automaton has 4683 states and 10978 transitions. Word has length 37 [2021-06-12 22:21:08,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:08,602 INFO L482 AbstractCegarLoop]: Abstraction has 4683 states and 10978 transitions. [2021-06-12 22:21:08,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:08,602 INFO L276 IsEmpty]: Start isEmpty. Operand 4683 states and 10978 transitions. [2021-06-12 22:21:08,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:21:08,605 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:08,605 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:08,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1551 [2021-06-12 22:21:08,806 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:08,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:08,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1551615737, now seen corresponding path program 104 times [2021-06-12 22:21:08,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:08,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7638666] [2021-06-12 22:21:08,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:08,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:09,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:09,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7638666] [2021-06-12 22:21:09,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7638666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:09,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421452579] [2021-06-12 22:21:09,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:09,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:21:09,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:09,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 22:21:09,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:09,578 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:09,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421452579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:09,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:09,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 35 [2021-06-12 22:21:09,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17911471] [2021-06-12 22:21:09,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 22:21:09,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:09,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 22:21:09,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:21:09,579 INFO L87 Difference]: Start difference. First operand 4683 states and 10978 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:15,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:15,481 INFO L93 Difference]: Finished difference Result 6084 states and 13860 transitions. [2021-06-12 22:21:15,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-06-12 22:21:15,482 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:21:15,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:15,486 INFO L225 Difference]: With dead ends: 6084 [2021-06-12 22:21:15,487 INFO L226 Difference]: Without dead ends: 6042 [2021-06-12 22:21:15,487 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7850 ImplicationChecksByTransitivity, 5193.1ms TimeCoverageRelationStatistics Valid=1871, Invalid=21081, Unknown=0, NotChecked=0, Total=22952 [2021-06-12 22:21:15,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6042 states. [2021-06-12 22:21:15,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6042 to 4770. [2021-06-12 22:21:15,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4770 states, 4769 states have (on average 2.3514363598238623) internal successors, (11214), 4769 states have internal predecessors, (11214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:15,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4770 states to 4770 states and 11214 transitions. [2021-06-12 22:21:15,535 INFO L78 Accepts]: Start accepts. Automaton has 4770 states and 11214 transitions. Word has length 37 [2021-06-12 22:21:15,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:15,535 INFO L482 AbstractCegarLoop]: Abstraction has 4770 states and 11214 transitions. [2021-06-12 22:21:15,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:15,535 INFO L276 IsEmpty]: Start isEmpty. Operand 4770 states and 11214 transitions. [2021-06-12 22:21:15,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:21:15,539 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:15,539 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:15,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1568 [2021-06-12 22:21:15,739 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:15,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:15,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1422873149, now seen corresponding path program 105 times [2021-06-12 22:21:15,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:15,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244896758] [2021-06-12 22:21:15,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:15,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:15,972 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:15,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:15,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244896758] [2021-06-12 22:21:15,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244896758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:15,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748097117] [2021-06-12 22:21:15,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:15,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:21:15,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:15,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:21:15,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:16,497 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:16,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748097117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:16,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:16,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-06-12 22:21:16,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539055081] [2021-06-12 22:21:16,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 22:21:16,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:16,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 22:21:16,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1143, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:21:16,498 INFO L87 Difference]: Start difference. First operand 4770 states and 11214 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:20,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:20,820 INFO L93 Difference]: Finished difference Result 6513 states and 14860 transitions. [2021-06-12 22:21:20,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-12 22:21:20,820 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:21:20,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:20,826 INFO L225 Difference]: With dead ends: 6513 [2021-06-12 22:21:20,826 INFO L226 Difference]: Without dead ends: 6447 [2021-06-12 22:21:20,827 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4973 ImplicationChecksByTransitivity, 3869.7ms TimeCoverageRelationStatistics Valid=1486, Invalid=12794, Unknown=0, NotChecked=0, Total=14280 [2021-06-12 22:21:20,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6447 states. [2021-06-12 22:21:20,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6447 to 4842. [2021-06-12 22:21:20,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4842 states, 4841 states have (on average 2.3462094608551953) internal successors, (11358), 4841 states have internal predecessors, (11358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:20,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4842 states to 4842 states and 11358 transitions. [2021-06-12 22:21:20,879 INFO L78 Accepts]: Start accepts. Automaton has 4842 states and 11358 transitions. Word has length 37 [2021-06-12 22:21:20,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:20,879 INFO L482 AbstractCegarLoop]: Abstraction has 4842 states and 11358 transitions. [2021-06-12 22:21:20,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:20,879 INFO L276 IsEmpty]: Start isEmpty. Operand 4842 states and 11358 transitions. [2021-06-12 22:21:20,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:21:20,883 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:20,883 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:21,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1588 [2021-06-12 22:21:21,097 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:21,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:21,097 INFO L82 PathProgramCache]: Analyzing trace with hash -196919433, now seen corresponding path program 106 times [2021-06-12 22:21:21,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:21,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107035377] [2021-06-12 22:21:21,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:21,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:21,469 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:21,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:21,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107035377] [2021-06-12 22:21:21,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107035377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:21,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122484792] [2021-06-12 22:21:21,470 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:21,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:21:21,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:21,497 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 22:21:21,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:22,203 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:22,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122484792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:22,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:22,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-06-12 22:21:22,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090563345] [2021-06-12 22:21:22,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 22:21:22,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:22,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 22:21:22,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:21:22,204 INFO L87 Difference]: Start difference. First operand 4842 states and 11358 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:24,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:24,193 INFO L93 Difference]: Finished difference Result 5247 states and 12151 transitions. [2021-06-12 22:21:24,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:21:24,193 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:21:24,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:24,198 INFO L225 Difference]: With dead ends: 5247 [2021-06-12 22:21:24,198 INFO L226 Difference]: Without dead ends: 5247 [2021-06-12 22:21:24,198 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 2053.0ms TimeCoverageRelationStatistics Valid=444, Invalid=3588, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 22:21:24,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5247 states. [2021-06-12 22:21:24,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5247 to 4860. [2021-06-12 22:21:24,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4860 states, 4859 states have (on average 2.3461617616793577) internal successors, (11400), 4859 states have internal predecessors, (11400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:24,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4860 states to 4860 states and 11400 transitions. [2021-06-12 22:21:24,254 INFO L78 Accepts]: Start accepts. Automaton has 4860 states and 11400 transitions. Word has length 37 [2021-06-12 22:21:24,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:24,254 INFO L482 AbstractCegarLoop]: Abstraction has 4860 states and 11400 transitions. [2021-06-12 22:21:24,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:24,254 INFO L276 IsEmpty]: Start isEmpty. Operand 4860 states and 11400 transitions. [2021-06-12 22:21:24,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:21:24,258 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:24,258 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:24,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1608,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:24,458 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:24,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:24,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1929285887, now seen corresponding path program 107 times [2021-06-12 22:21:24,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:24,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999985414] [2021-06-12 22:21:24,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:24,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:24,733 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:24,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:24,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999985414] [2021-06-12 22:21:24,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999985414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:24,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738267732] [2021-06-12 22:21:24,733 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:24,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 22:21:24,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:24,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 22:21:24,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:25,426 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:25,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738267732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:25,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:25,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-06-12 22:21:25,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426326729] [2021-06-12 22:21:25,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 22:21:25,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:25,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 22:21:25,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:21:25,427 INFO L87 Difference]: Start difference. First operand 4860 states and 11400 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:27,890 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-06-12 22:21:28,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:28,420 INFO L93 Difference]: Finished difference Result 5227 states and 12121 transitions. [2021-06-12 22:21:28,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 22:21:28,420 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:21:28,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:28,425 INFO L225 Difference]: With dead ends: 5227 [2021-06-12 22:21:28,425 INFO L226 Difference]: Without dead ends: 5227 [2021-06-12 22:21:28,425 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 2861.3ms TimeCoverageRelationStatistics Valid=669, Invalid=5183, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 22:21:28,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5227 states. [2021-06-12 22:21:28,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5227 to 4864. [2021-06-12 22:21:28,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4864 states, 4863 states have (on average 2.346699568167798) internal successors, (11412), 4863 states have internal predecessors, (11412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:28,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4864 states to 4864 states and 11412 transitions. [2021-06-12 22:21:28,470 INFO L78 Accepts]: Start accepts. Automaton has 4864 states and 11412 transitions. Word has length 37 [2021-06-12 22:21:28,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:28,470 INFO L482 AbstractCegarLoop]: Abstraction has 4864 states and 11412 transitions. [2021-06-12 22:21:28,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:28,470 INFO L276 IsEmpty]: Start isEmpty. Operand 4864 states and 11412 transitions. [2021-06-12 22:21:28,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:21:28,474 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:28,474 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:28,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1629,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:28,674 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:28,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:28,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1533256893, now seen corresponding path program 108 times [2021-06-12 22:21:28,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:28,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539052445] [2021-06-12 22:21:28,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:28,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:28,947 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:28,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:28,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539052445] [2021-06-12 22:21:28,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539052445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:28,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761729543] [2021-06-12 22:21:28,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:28,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:21:28,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:28,975 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 22:21:28,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:29,646 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:29,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761729543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:29,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:29,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-06-12 22:21:29,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093815832] [2021-06-12 22:21:29,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 22:21:29,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:29,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 22:21:29,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:21:29,647 INFO L87 Difference]: Start difference. First operand 4864 states and 11412 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:32,323 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2021-06-12 22:21:32,497 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2021-06-12 22:21:32,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:32,658 INFO L93 Difference]: Finished difference Result 5273 states and 12215 transitions. [2021-06-12 22:21:32,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 22:21:32,670 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:21:32,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:32,675 INFO L225 Difference]: With dead ends: 5273 [2021-06-12 22:21:32,675 INFO L226 Difference]: Without dead ends: 5273 [2021-06-12 22:21:32,676 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1911 ImplicationChecksByTransitivity, 2964.4ms TimeCoverageRelationStatistics Valid=786, Invalid=5856, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 22:21:32,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5273 states. [2021-06-12 22:21:32,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5273 to 4870. [2021-06-12 22:21:32,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4870 states, 4869 states have (on average 2.347915383035531) internal successors, (11432), 4869 states have internal predecessors, (11432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:32,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4870 states to 4870 states and 11432 transitions. [2021-06-12 22:21:32,723 INFO L78 Accepts]: Start accepts. Automaton has 4870 states and 11432 transitions. Word has length 37 [2021-06-12 22:21:32,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:32,723 INFO L482 AbstractCegarLoop]: Abstraction has 4870 states and 11432 transitions. [2021-06-12 22:21:32,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:32,723 INFO L276 IsEmpty]: Start isEmpty. Operand 4870 states and 11432 transitions. [2021-06-12 22:21:32,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:21:32,726 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:32,726 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:32,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1650 [2021-06-12 22:21:32,927 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:32,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:32,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1661999481, now seen corresponding path program 109 times [2021-06-12 22:21:32,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:32,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364156365] [2021-06-12 22:21:32,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:32,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:33,227 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:33,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:33,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364156365] [2021-06-12 22:21:33,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364156365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:33,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824836553] [2021-06-12 22:21:33,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:33,253 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-12 22:21:33,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:33,967 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:33,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824836553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:33,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:33,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-06-12 22:21:33,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225072255] [2021-06-12 22:21:33,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 22:21:33,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:33,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 22:21:33,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:21:33,968 INFO L87 Difference]: Start difference. First operand 4870 states and 11432 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:37,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:37,248 INFO L93 Difference]: Finished difference Result 5834 states and 13420 transitions. [2021-06-12 22:21:37,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-12 22:21:37,249 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:21:37,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:37,254 INFO L225 Difference]: With dead ends: 5834 [2021-06-12 22:21:37,254 INFO L226 Difference]: Without dead ends: 5834 [2021-06-12 22:21:37,255 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2240 ImplicationChecksByTransitivity, 3197.2ms TimeCoverageRelationStatistics Valid=930, Invalid=6552, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 22:21:37,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5834 states. [2021-06-12 22:21:37,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5834 to 4915. [2021-06-12 22:21:37,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4915 states, 4914 states have (on average 2.349409849409849) internal successors, (11545), 4914 states have internal predecessors, (11545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:37,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4915 states to 4915 states and 11545 transitions. [2021-06-12 22:21:37,301 INFO L78 Accepts]: Start accepts. Automaton has 4915 states and 11545 transitions. Word has length 37 [2021-06-12 22:21:37,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:37,302 INFO L482 AbstractCegarLoop]: Abstraction has 4915 states and 11545 transitions. [2021-06-12 22:21:37,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:37,302 INFO L276 IsEmpty]: Start isEmpty. Operand 4915 states and 11545 transitions. [2021-06-12 22:21:37,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:21:37,306 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:37,306 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:37,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1670,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:37,506 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:37,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:37,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1011930511, now seen corresponding path program 110 times [2021-06-12 22:21:37,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:37,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78741120] [2021-06-12 22:21:37,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:37,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:37,785 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:37,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:37,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78741120] [2021-06-12 22:21:37,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78741120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:37,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32422707] [2021-06-12 22:21:37,786 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:37,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:21:37,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:37,810 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 22:21:37,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:38,425 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:38,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32422707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:38,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:38,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2021-06-12 22:21:38,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434178119] [2021-06-12 22:21:38,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 22:21:38,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:38,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 22:21:38,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:21:38,426 INFO L87 Difference]: Start difference. First operand 4915 states and 11545 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:41,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:41,484 INFO L93 Difference]: Finished difference Result 5198 states and 12074 transitions. [2021-06-12 22:21:41,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 22:21:41,484 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:21:41,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:41,500 INFO L225 Difference]: With dead ends: 5198 [2021-06-12 22:21:41,500 INFO L226 Difference]: Without dead ends: 5194 [2021-06-12 22:21:41,500 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1577 ImplicationChecksByTransitivity, 2812.7ms TimeCoverageRelationStatistics Valid=695, Invalid=5467, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 22:21:41,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5194 states. [2021-06-12 22:21:41,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5194 to 4902. [2021-06-12 22:21:41,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4902 states, 4901 states have (on average 2.3472760661089573) internal successors, (11504), 4901 states have internal predecessors, (11504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:41,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4902 states to 4902 states and 11504 transitions. [2021-06-12 22:21:41,549 INFO L78 Accepts]: Start accepts. Automaton has 4902 states and 11504 transitions. Word has length 37 [2021-06-12 22:21:41,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:41,549 INFO L482 AbstractCegarLoop]: Abstraction has 4902 states and 11504 transitions. [2021-06-12 22:21:41,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:41,549 INFO L276 IsEmpty]: Start isEmpty. Operand 4902 states and 11504 transitions. [2021-06-12 22:21:41,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:21:41,553 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:41,554 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:41,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1695 [2021-06-12 22:21:41,756 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:41,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:41,757 INFO L82 PathProgramCache]: Analyzing trace with hash 783554167, now seen corresponding path program 111 times [2021-06-12 22:21:41,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:41,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287437460] [2021-06-12 22:21:41,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:41,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:42,007 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:42,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:42,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287437460] [2021-06-12 22:21:42,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287437460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:42,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91810200] [2021-06-12 22:21:42,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:42,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:21:42,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:42,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 22:21:42,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:42,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91810200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:42,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:42,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 32 [2021-06-12 22:21:42,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717062765] [2021-06-12 22:21:42,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 22:21:42,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:42,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 22:21:42,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:21:42,399 INFO L87 Difference]: Start difference. First operand 4902 states and 11504 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:45,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:45,217 INFO L93 Difference]: Finished difference Result 6564 states and 15090 transitions. [2021-06-12 22:21:45,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-12 22:21:45,217 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:21:45,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:45,223 INFO L225 Difference]: With dead ends: 6564 [2021-06-12 22:21:45,223 INFO L226 Difference]: Without dead ends: 6360 [2021-06-12 22:21:45,223 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2172 ImplicationChecksByTransitivity, 2412.3ms TimeCoverageRelationStatistics Valid=758, Invalid=7432, Unknown=0, NotChecked=0, Total=8190 [2021-06-12 22:21:45,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6360 states. [2021-06-12 22:21:45,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6360 to 5277. [2021-06-12 22:21:45,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5277 states, 5276 states have (on average 2.3421152388172857) internal successors, (12357), 5276 states have internal predecessors, (12357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:45,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5277 states to 5277 states and 12357 transitions. [2021-06-12 22:21:45,276 INFO L78 Accepts]: Start accepts. Automaton has 5277 states and 12357 transitions. Word has length 37 [2021-06-12 22:21:45,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:45,276 INFO L482 AbstractCegarLoop]: Abstraction has 5277 states and 12357 transitions. [2021-06-12 22:21:45,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:45,276 INFO L276 IsEmpty]: Start isEmpty. Operand 5277 states and 12357 transitions. [2021-06-12 22:21:45,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:21:45,280 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:45,280 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:45,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1715 [2021-06-12 22:21:45,481 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:45,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:45,481 INFO L82 PathProgramCache]: Analyzing trace with hash -136117129, now seen corresponding path program 112 times [2021-06-12 22:21:45,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:45,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769863296] [2021-06-12 22:21:45,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:45,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:45,724 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:45,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:45,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769863296] [2021-06-12 22:21:45,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769863296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:45,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629579995] [2021-06-12 22:21:45,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:45,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:21:45,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:45,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 22:21:45,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:46,294 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:46,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629579995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:46,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:46,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 31 [2021-06-12 22:21:46,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647710323] [2021-06-12 22:21:46,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 22:21:46,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:46,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 22:21:46,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:21:46,295 INFO L87 Difference]: Start difference. First operand 5277 states and 12357 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:48,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:48,774 INFO L93 Difference]: Finished difference Result 7190 states and 16637 transitions. [2021-06-12 22:21:48,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 22:21:48,774 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:21:48,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:48,780 INFO L225 Difference]: With dead ends: 7190 [2021-06-12 22:21:48,780 INFO L226 Difference]: Without dead ends: 7127 [2021-06-12 22:21:48,780 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 2288.8ms TimeCoverageRelationStatistics Valid=766, Invalid=4784, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 22:21:48,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7127 states. [2021-06-12 22:21:48,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7127 to 5386. [2021-06-12 22:21:48,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5386 states, 5385 states have (on average 2.337418755803157) internal successors, (12587), 5385 states have internal predecessors, (12587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:48,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5386 states to 5386 states and 12587 transitions. [2021-06-12 22:21:48,831 INFO L78 Accepts]: Start accepts. Automaton has 5386 states and 12587 transitions. Word has length 37 [2021-06-12 22:21:48,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:48,831 INFO L482 AbstractCegarLoop]: Abstraction has 5386 states and 12587 transitions. [2021-06-12 22:21:48,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:48,831 INFO L276 IsEmpty]: Start isEmpty. Operand 5386 states and 12587 transitions. [2021-06-12 22:21:48,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:21:48,834 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:48,834 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:49,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1730 [2021-06-12 22:21:49,035 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:49,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:49,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1645417915, now seen corresponding path program 113 times [2021-06-12 22:21:49,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:49,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793068479] [2021-06-12 22:21:49,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:49,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:49,269 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:49,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:49,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793068479] [2021-06-12 22:21:49,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793068479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:49,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243573590] [2021-06-12 22:21:49,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:49,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 22:21:49,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:49,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 22:21:49,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:49,829 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:49,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243573590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:49,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:49,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 31 [2021-06-12 22:21:49,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462383467] [2021-06-12 22:21:49,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 22:21:49,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:49,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 22:21:49,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:21:49,830 INFO L87 Difference]: Start difference. First operand 5386 states and 12587 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:52,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:52,958 INFO L93 Difference]: Finished difference Result 7812 states and 17955 transitions. [2021-06-12 22:21:52,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 22:21:52,958 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:21:52,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:52,965 INFO L225 Difference]: With dead ends: 7812 [2021-06-12 22:21:52,965 INFO L226 Difference]: Without dead ends: 7773 [2021-06-12 22:21:52,966 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2156 ImplicationChecksByTransitivity, 2922.0ms TimeCoverageRelationStatistics Valid=993, Invalid=6147, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 22:21:52,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7773 states. [2021-06-12 22:21:53,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7773 to 5464. [2021-06-12 22:21:53,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5464 states, 5463 states have (on average 2.33479773018488) internal successors, (12755), 5463 states have internal predecessors, (12755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:53,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5464 states to 5464 states and 12755 transitions. [2021-06-12 22:21:53,028 INFO L78 Accepts]: Start accepts. Automaton has 5464 states and 12755 transitions. Word has length 37 [2021-06-12 22:21:53,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:53,028 INFO L482 AbstractCegarLoop]: Abstraction has 5464 states and 12755 transitions. [2021-06-12 22:21:53,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:53,029 INFO L276 IsEmpty]: Start isEmpty. Operand 5464 states and 12755 transitions. [2021-06-12 22:21:53,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:21:53,033 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:53,033 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:53,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1754 [2021-06-12 22:21:53,233 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:53,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:53,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1356769279, now seen corresponding path program 114 times [2021-06-12 22:21:53,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:53,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549328649] [2021-06-12 22:21:53,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:53,505 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:53,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:53,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549328649] [2021-06-12 22:21:53,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549328649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:53,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135142851] [2021-06-12 22:21:53,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:53,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:21:53,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:53,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 22:21:53,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:54,090 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:54,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135142851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:54,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:54,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 32 [2021-06-12 22:21:54,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778016238] [2021-06-12 22:21:54,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 22:21:54,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:54,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 22:21:54,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:21:54,091 INFO L87 Difference]: Start difference. First operand 5464 states and 12755 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:57,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:57,962 INFO L93 Difference]: Finished difference Result 7788 states and 17905 transitions. [2021-06-12 22:21:57,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 22:21:57,962 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:21:57,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:57,969 INFO L225 Difference]: With dead ends: 7788 [2021-06-12 22:21:57,970 INFO L226 Difference]: Without dead ends: 7746 [2021-06-12 22:21:57,970 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2989 ImplicationChecksByTransitivity, 3595.3ms TimeCoverageRelationStatistics Valid=1316, Invalid=7614, Unknown=0, NotChecked=0, Total=8930 [2021-06-12 22:21:57,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7746 states. [2021-06-12 22:21:58,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7746 to 5484. [2021-06-12 22:21:58,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5484 states, 5483 states have (on average 2.335400328287434) internal successors, (12805), 5483 states have internal predecessors, (12805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:58,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5484 states to 5484 states and 12805 transitions. [2021-06-12 22:21:58,036 INFO L78 Accepts]: Start accepts. Automaton has 5484 states and 12805 transitions. Word has length 37 [2021-06-12 22:21:58,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:58,037 INFO L482 AbstractCegarLoop]: Abstraction has 5484 states and 12805 transitions. [2021-06-12 22:21:58,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:58,037 INFO L276 IsEmpty]: Start isEmpty. Operand 5484 states and 12805 transitions. [2021-06-12 22:21:58,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:21:58,041 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:58,041 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:58,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1774,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:58,242 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:58,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:58,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1945861701, now seen corresponding path program 115 times [2021-06-12 22:21:58,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:58,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235750450] [2021-06-12 22:21:58,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:58,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:58,449 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:58,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:58,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235750450] [2021-06-12 22:21:58,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235750450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:58,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999137315] [2021-06-12 22:21:58,449 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:58,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:58,473 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 22:21:58,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:59,073 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:59,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999137315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:59,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:59,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-06-12 22:21:59,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651978178] [2021-06-12 22:21:59,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 22:21:59,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:59,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 22:21:59,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:21:59,074 INFO L87 Difference]: Start difference. First operand 5484 states and 12805 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:01,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:01,513 INFO L93 Difference]: Finished difference Result 5965 states and 13762 transitions. [2021-06-12 22:22:01,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 22:22:01,514 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:22:01,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:01,518 INFO L225 Difference]: With dead ends: 5965 [2021-06-12 22:22:01,518 INFO L226 Difference]: Without dead ends: 5935 [2021-06-12 22:22:01,518 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2207.3ms TimeCoverageRelationStatistics Valid=658, Invalid=6148, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 22:22:01,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5935 states. [2021-06-12 22:22:01,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5935 to 5492. [2021-06-12 22:22:01,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5492 states, 5491 states have (on average 2.3352759060280457) internal successors, (12823), 5491 states have internal predecessors, (12823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:01,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5492 states to 5492 states and 12823 transitions. [2021-06-12 22:22:01,567 INFO L78 Accepts]: Start accepts. Automaton has 5492 states and 12823 transitions. Word has length 37 [2021-06-12 22:22:01,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:01,567 INFO L482 AbstractCegarLoop]: Abstraction has 5492 states and 12823 transitions. [2021-06-12 22:22:01,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:01,567 INFO L276 IsEmpty]: Start isEmpty. Operand 5492 states and 12823 transitions. [2021-06-12 22:22:01,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:22:01,571 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:01,571 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:01,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1794 [2021-06-12 22:22:01,772 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:01,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:01,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1113437185, now seen corresponding path program 116 times [2021-06-12 22:22:01,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:01,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752207361] [2021-06-12 22:22:01,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:01,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:01,970 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:01,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:01,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752207361] [2021-06-12 22:22:01,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752207361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:01,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478762067] [2021-06-12 22:22:01,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:01,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:22:01,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:01,998 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 22:22:01,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:02,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478762067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:02,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:02,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-06-12 22:22:02,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380109804] [2021-06-12 22:22:02,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 22:22:02,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:02,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 22:22:02,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1143, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:22:02,627 INFO L87 Difference]: Start difference. First operand 5492 states and 12823 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:05,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:05,530 INFO L93 Difference]: Finished difference Result 5816 states and 13464 transitions. [2021-06-12 22:22:05,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 22:22:05,530 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:22:05,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:05,536 INFO L225 Difference]: With dead ends: 5816 [2021-06-12 22:22:05,536 INFO L226 Difference]: Without dead ends: 5798 [2021-06-12 22:22:05,537 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2285 ImplicationChecksByTransitivity, 2665.1ms TimeCoverageRelationStatistics Valid=700, Invalid=7132, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 22:22:05,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5798 states. [2021-06-12 22:22:05,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5798 to 5502. [2021-06-12 22:22:05,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5502 states, 5501 states have (on average 2.335393564806399) internal successors, (12847), 5501 states have internal predecessors, (12847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:05,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5502 states to 5502 states and 12847 transitions. [2021-06-12 22:22:05,590 INFO L78 Accepts]: Start accepts. Automaton has 5502 states and 12847 transitions. Word has length 37 [2021-06-12 22:22:05,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:05,590 INFO L482 AbstractCegarLoop]: Abstraction has 5502 states and 12847 transitions. [2021-06-12 22:22:05,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:05,590 INFO L276 IsEmpty]: Start isEmpty. Operand 5502 states and 12847 transitions. [2021-06-12 22:22:05,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:22:05,594 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:05,594 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:05,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1808 [2021-06-12 22:22:05,795 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:05,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:05,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1242179773, now seen corresponding path program 117 times [2021-06-12 22:22:05,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:05,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868064945] [2021-06-12 22:22:05,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:05,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:06,017 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:06,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:06,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868064945] [2021-06-12 22:22:06,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868064945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:06,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914543184] [2021-06-12 22:22:06,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:06,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:22:06,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:06,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:22:06,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:06,528 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:06,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914543184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:06,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:06,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-06-12 22:22:06,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234434152] [2021-06-12 22:22:06,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 22:22:06,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:06,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 22:22:06,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1096, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:22:06,529 INFO L87 Difference]: Start difference. First operand 5502 states and 12847 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:12,594 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-06-12 22:22:17,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:17,933 INFO L93 Difference]: Finished difference Result 7773 states and 17514 transitions. [2021-06-12 22:22:17,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 221 states. [2021-06-12 22:22:17,934 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:22:17,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:17,940 INFO L225 Difference]: With dead ends: 7773 [2021-06-12 22:22:17,940 INFO L226 Difference]: Without dead ends: 7761 [2021-06-12 22:22:17,942 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22159 ImplicationChecksByTransitivity, 10076.3ms TimeCoverageRelationStatistics Valid=4256, Invalid=51676, Unknown=0, NotChecked=0, Total=55932 [2021-06-12 22:22:17,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7761 states. [2021-06-12 22:22:17,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7761 to 5514. [2021-06-12 22:22:17,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5514 states, 5513 states have (on average 2.3359332486849267) internal successors, (12878), 5513 states have internal predecessors, (12878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:18,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5514 states to 5514 states and 12878 transitions. [2021-06-12 22:22:18,003 INFO L78 Accepts]: Start accepts. Automaton has 5514 states and 12878 transitions. Word has length 37 [2021-06-12 22:22:18,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:18,003 INFO L482 AbstractCegarLoop]: Abstraction has 5514 states and 12878 transitions. [2021-06-12 22:22:18,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:18,003 INFO L276 IsEmpty]: Start isEmpty. Operand 5514 states and 12878 transitions. [2021-06-12 22:22:18,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:22:18,007 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:18,007 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:18,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1823,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:18,208 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:18,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:18,208 INFO L82 PathProgramCache]: Analyzing trace with hash -592110803, now seen corresponding path program 118 times [2021-06-12 22:22:18,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:18,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500149659] [2021-06-12 22:22:18,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:18,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:18,442 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:18,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:18,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500149659] [2021-06-12 22:22:18,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500149659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:18,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465839540] [2021-06-12 22:22:18,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:18,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:22:18,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:18,472 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 22:22:18,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:19,093 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:19,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465839540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:19,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:19,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-06-12 22:22:19,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617791885] [2021-06-12 22:22:19,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 22:22:19,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:19,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 22:22:19,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1138, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:22:19,094 INFO L87 Difference]: Start difference. First operand 5514 states and 12878 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:21,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:21,624 INFO L93 Difference]: Finished difference Result 5766 states and 13384 transitions. [2021-06-12 22:22:21,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 22:22:21,624 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:22:21,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:21,629 INFO L225 Difference]: With dead ends: 5766 [2021-06-12 22:22:21,629 INFO L226 Difference]: Without dead ends: 5766 [2021-06-12 22:22:21,630 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 2485.7ms TimeCoverageRelationStatistics Valid=572, Invalid=4978, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 22:22:21,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5766 states. [2021-06-12 22:22:21,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5766 to 5511. [2021-06-12 22:22:21,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5511 states, 5510 states have (on average 2.3364791288566242) internal successors, (12874), 5510 states have internal predecessors, (12874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:21,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5511 states to 5511 states and 12874 transitions. [2021-06-12 22:22:21,683 INFO L78 Accepts]: Start accepts. Automaton has 5511 states and 12874 transitions. Word has length 37 [2021-06-12 22:22:21,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:21,684 INFO L482 AbstractCegarLoop]: Abstraction has 5511 states and 12874 transitions. [2021-06-12 22:22:21,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:21,684 INFO L276 IsEmpty]: Start isEmpty. Operand 5511 states and 12874 transitions. [2021-06-12 22:22:21,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:22:21,689 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:21,689 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:21,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1847 [2021-06-12 22:22:21,889 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:21,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:21,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1231736695, now seen corresponding path program 119 times [2021-06-12 22:22:21,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:21,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022610073] [2021-06-12 22:22:21,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:21,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:22,120 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:22,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:22,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022610073] [2021-06-12 22:22:22,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022610073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:22,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611185545] [2021-06-12 22:22:22,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:22,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 22:22:22,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:22,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 22:22:22,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:22,858 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:22,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611185545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:22,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:22,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-12 22:22:22,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263073394] [2021-06-12 22:22:22,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 22:22:22,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:22,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 22:22:22,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1241, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:22:22,859 INFO L87 Difference]: Start difference. First operand 5511 states and 12874 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:27,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:27,033 INFO L93 Difference]: Finished difference Result 6342 states and 14521 transitions. [2021-06-12 22:22:27,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-12 22:22:27,034 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:22:27,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:27,040 INFO L225 Difference]: With dead ends: 6342 [2021-06-12 22:22:27,040 INFO L226 Difference]: Without dead ends: 6285 [2021-06-12 22:22:27,041 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3248 ImplicationChecksByTransitivity, 3753.5ms TimeCoverageRelationStatistics Valid=895, Invalid=10877, Unknown=0, NotChecked=0, Total=11772 [2021-06-12 22:22:27,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6285 states. [2021-06-12 22:22:27,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6285 to 5541. [2021-06-12 22:22:27,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5541 states, 5540 states have (on average 2.334657039711191) internal successors, (12934), 5540 states have internal predecessors, (12934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:27,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5541 states to 5541 states and 12934 transitions. [2021-06-12 22:22:27,107 INFO L78 Accepts]: Start accepts. Automaton has 5541 states and 12934 transitions. Word has length 37 [2021-06-12 22:22:27,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:27,108 INFO L482 AbstractCegarLoop]: Abstraction has 5541 states and 12934 transitions. [2021-06-12 22:22:27,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:27,108 INFO L276 IsEmpty]: Start isEmpty. Operand 5541 states and 12934 transitions. [2021-06-12 22:22:27,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:22:27,112 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:27,112 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:27,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1861 [2021-06-12 22:22:27,313 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:27,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:27,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1935418623, now seen corresponding path program 120 times [2021-06-12 22:22:27,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:27,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559697352] [2021-06-12 22:22:27,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:27,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:27,533 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:27,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:27,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559697352] [2021-06-12 22:22:27,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559697352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:27,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946292966] [2021-06-12 22:22:27,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:27,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:22:27,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:27,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 22:22:27,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:28,043 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:28,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946292966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:28,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:28,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 35 [2021-06-12 22:22:28,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795381958] [2021-06-12 22:22:28,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 22:22:28,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:28,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 22:22:28,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1160, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:22:28,044 INFO L87 Difference]: Start difference. First operand 5541 states and 12934 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:42,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:42,028 INFO L93 Difference]: Finished difference Result 8099 states and 18208 transitions. [2021-06-12 22:22:42,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 286 states. [2021-06-12 22:22:42,029 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:22:42,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:42,035 INFO L225 Difference]: With dead ends: 8099 [2021-06-12 22:22:42,035 INFO L226 Difference]: Without dead ends: 8087 [2021-06-12 22:22:42,038 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37586 ImplicationChecksByTransitivity, 12409.2ms TimeCoverageRelationStatistics Valid=6402, Invalid=84500, Unknown=0, NotChecked=0, Total=90902 [2021-06-12 22:22:42,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8087 states. [2021-06-12 22:22:42,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8087 to 5547. [2021-06-12 22:22:42,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5547 states, 5546 states have (on average 2.3348359177785794) internal successors, (12949), 5546 states have internal predecessors, (12949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:42,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5547 states to 5547 states and 12949 transitions. [2021-06-12 22:22:42,099 INFO L78 Accepts]: Start accepts. Automaton has 5547 states and 12949 transitions. Word has length 37 [2021-06-12 22:22:42,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:42,100 INFO L482 AbstractCegarLoop]: Abstraction has 5547 states and 12949 transitions. [2021-06-12 22:22:42,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:42,100 INFO L276 IsEmpty]: Start isEmpty. Operand 5547 states and 12949 transitions. [2021-06-12 22:22:42,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:22:42,104 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:42,104 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:42,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1881 [2021-06-12 22:22:42,306 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:42,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:42,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1709479703, now seen corresponding path program 121 times [2021-06-12 22:22:42,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:42,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845322506] [2021-06-12 22:22:42,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:42,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:42,522 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:42,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:42,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845322506] [2021-06-12 22:22:42,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845322506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:42,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775963760] [2021-06-12 22:22:42,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:42,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:42,548 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 22:22:42,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:43,206 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:43,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775963760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:43,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:43,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-12 22:22:43,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429025688] [2021-06-12 22:22:43,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 22:22:43,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:43,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 22:22:43,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1143, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:22:43,207 INFO L87 Difference]: Start difference. First operand 5547 states and 12949 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:46,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:46,519 INFO L93 Difference]: Finished difference Result 6293 states and 14448 transitions. [2021-06-12 22:22:46,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-12 22:22:46,519 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:22:46,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:46,523 INFO L225 Difference]: With dead ends: 6293 [2021-06-12 22:22:46,523 INFO L226 Difference]: Without dead ends: 6284 [2021-06-12 22:22:46,524 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2326 ImplicationChecksByTransitivity, 2897.1ms TimeCoverageRelationStatistics Valid=749, Invalid=7623, Unknown=0, NotChecked=0, Total=8372 [2021-06-12 22:22:46,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6284 states. [2021-06-12 22:22:46,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6284 to 5583. [2021-06-12 22:22:46,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5583 states, 5582 states have (on average 2.3350053744177712) internal successors, (13034), 5582 states have internal predecessors, (13034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:46,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5583 states to 5583 states and 13034 transitions. [2021-06-12 22:22:46,574 INFO L78 Accepts]: Start accepts. Automaton has 5583 states and 13034 transitions. Word has length 37 [2021-06-12 22:22:46,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:46,574 INFO L482 AbstractCegarLoop]: Abstraction has 5583 states and 13034 transitions. [2021-06-12 22:22:46,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:46,575 INFO L276 IsEmpty]: Start isEmpty. Operand 5583 states and 13034 transitions. [2021-06-12 22:22:46,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:22:46,579 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:46,579 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:46,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1910 [2021-06-12 22:22:46,779 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:46,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:46,779 INFO L82 PathProgramCache]: Analyzing trace with hash 956173311, now seen corresponding path program 122 times [2021-06-12 22:22:46,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:46,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294148928] [2021-06-12 22:22:46,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:46,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:46,995 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:46,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:46,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294148928] [2021-06-12 22:22:46,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294148928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:46,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382720074] [2021-06-12 22:22:46,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:47,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:22:47,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:47,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 22:22:47,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:47,529 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:47,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382720074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:47,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:47,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 31 [2021-06-12 22:22:47,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213451536] [2021-06-12 22:22:47,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 22:22:47,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:47,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 22:22:47,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:22:47,530 INFO L87 Difference]: Start difference. First operand 5583 states and 13034 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:51,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:51,056 INFO L93 Difference]: Finished difference Result 7671 states and 17703 transitions. [2021-06-12 22:22:51,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 22:22:51,056 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:22:51,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:51,063 INFO L225 Difference]: With dead ends: 7671 [2021-06-12 22:22:51,063 INFO L226 Difference]: Without dead ends: 7636 [2021-06-12 22:22:51,063 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2881 ImplicationChecksByTransitivity, 3316.7ms TimeCoverageRelationStatistics Valid=1319, Invalid=6871, Unknown=0, NotChecked=0, Total=8190 [2021-06-12 22:22:51,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7636 states. [2021-06-12 22:22:51,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7636 to 5598. [2021-06-12 22:22:51,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5598 states, 5597 states have (on average 2.3353582276219402) internal successors, (13071), 5597 states have internal predecessors, (13071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:51,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5598 states to 5598 states and 13071 transitions. [2021-06-12 22:22:51,126 INFO L78 Accepts]: Start accepts. Automaton has 5598 states and 13071 transitions. Word has length 37 [2021-06-12 22:22:51,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:51,126 INFO L482 AbstractCegarLoop]: Abstraction has 5598 states and 13071 transitions. [2021-06-12 22:22:51,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:51,126 INFO L276 IsEmpty]: Start isEmpty. Operand 5598 states and 13071 transitions. [2021-06-12 22:22:51,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:22:51,130 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:51,130 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:51,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1928,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:51,331 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:51,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:51,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1447643043, now seen corresponding path program 123 times [2021-06-12 22:22:51,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:51,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287960543] [2021-06-12 22:22:51,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:51,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:51,492 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:51,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:51,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287960543] [2021-06-12 22:22:51,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287960543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:51,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635269808] [2021-06-12 22:22:51,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:51,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 22:22:51,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:51,519 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-12 22:22:51,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:51,920 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:22:51,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635269808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:51,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:51,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2021-06-12 22:22:51,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827460355] [2021-06-12 22:22:51,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 22:22:51,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:51,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 22:22:51,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:22:51,921 INFO L87 Difference]: Start difference. First operand 5598 states and 13071 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:52,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:52,515 INFO L93 Difference]: Finished difference Result 6845 states and 15895 transitions. [2021-06-12 22:22:52,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:22:52,515 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:22:52,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:52,522 INFO L225 Difference]: With dead ends: 6845 [2021-06-12 22:22:52,522 INFO L226 Difference]: Without dead ends: 6841 [2021-06-12 22:22:52,522 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 752.5ms TimeCoverageRelationStatistics Valid=406, Invalid=1664, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:22:52,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6841 states. [2021-06-12 22:22:52,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6841 to 5631. [2021-06-12 22:22:52,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5631 states, 5630 states have (on average 2.3408525754884546) internal successors, (13179), 5630 states have internal predecessors, (13179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:52,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5631 states to 5631 states and 13179 transitions. [2021-06-12 22:22:52,576 INFO L78 Accepts]: Start accepts. Automaton has 5631 states and 13179 transitions. Word has length 37 [2021-06-12 22:22:52,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:52,576 INFO L482 AbstractCegarLoop]: Abstraction has 5631 states and 13179 transitions. [2021-06-12 22:22:52,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:52,576 INFO L276 IsEmpty]: Start isEmpty. Operand 5631 states and 13179 transitions. [2021-06-12 22:22:52,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:22:52,580 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:52,580 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:52,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1950 [2021-06-12 22:22:52,781 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:52,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:52,782 INFO L82 PathProgramCache]: Analyzing trace with hash 2142478777, now seen corresponding path program 124 times [2021-06-12 22:22:52,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:52,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819290892] [2021-06-12 22:22:52,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:52,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:53,026 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:53,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:53,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819290892] [2021-06-12 22:22:53,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819290892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:53,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467590127] [2021-06-12 22:22:53,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:53,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:22:53,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:53,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 22:22:53,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:53,580 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:53,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467590127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:53,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:53,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 32 [2021-06-12 22:22:53,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659062056] [2021-06-12 22:22:53,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 22:22:53,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:53,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 22:22:53,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:22:53,581 INFO L87 Difference]: Start difference. First operand 5631 states and 13179 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:57,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:57,038 INFO L93 Difference]: Finished difference Result 8549 states and 19665 transitions. [2021-06-12 22:22:57,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 22:22:57,038 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:22:57,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:57,046 INFO L225 Difference]: With dead ends: 8549 [2021-06-12 22:22:57,046 INFO L226 Difference]: Without dead ends: 8498 [2021-06-12 22:22:57,046 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 3238.0ms TimeCoverageRelationStatistics Valid=959, Invalid=5683, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 22:22:57,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8498 states. [2021-06-12 22:22:57,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8498 to 5868. [2021-06-12 22:22:57,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5868 states, 5867 states have (on average 2.3441281745355376) internal successors, (13753), 5867 states have internal predecessors, (13753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:57,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5868 states to 5868 states and 13753 transitions. [2021-06-12 22:22:57,117 INFO L78 Accepts]: Start accepts. Automaton has 5868 states and 13753 transitions. Word has length 37 [2021-06-12 22:22:57,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:57,118 INFO L482 AbstractCegarLoop]: Abstraction has 5868 states and 13753 transitions. [2021-06-12 22:22:57,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:57,118 INFO L276 IsEmpty]: Start isEmpty. Operand 5868 states and 13753 transitions. [2021-06-12 22:22:57,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:22:57,123 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:57,124 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:57,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1967,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:57,324 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:57,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:57,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1847263995, now seen corresponding path program 125 times [2021-06-12 22:22:57,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:57,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007299809] [2021-06-12 22:22:57,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:57,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:57,620 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:57,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:57,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007299809] [2021-06-12 22:22:57,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007299809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:57,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677106795] [2021-06-12 22:22:57,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:57,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 22:22:57,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:57,647 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 22:22:57,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:58,387 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:58,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677106795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:58,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:58,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-12 22:22:58,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217721663] [2021-06-12 22:22:58,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 22:22:58,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:58,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 22:22:58,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1211, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:22:58,388 INFO L87 Difference]: Start difference. First operand 5868 states and 13753 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:00,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:00,351 INFO L93 Difference]: Finished difference Result 6341 states and 14705 transitions. [2021-06-12 22:23:00,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 22:23:00,351 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:23:00,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:00,356 INFO L225 Difference]: With dead ends: 6341 [2021-06-12 22:23:00,356 INFO L226 Difference]: Without dead ends: 6287 [2021-06-12 22:23:00,356 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 2236.4ms TimeCoverageRelationStatistics Valid=431, Invalid=4971, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 22:23:00,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6287 states. [2021-06-12 22:23:00,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6287 to 6016. [2021-06-12 22:23:00,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6016 states, 6015 states have (on average 2.342975893599335) internal successors, (14093), 6015 states have internal predecessors, (14093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:00,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6016 states to 6016 states and 14093 transitions. [2021-06-12 22:23:00,414 INFO L78 Accepts]: Start accepts. Automaton has 6016 states and 14093 transitions. Word has length 37 [2021-06-12 22:23:00,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:00,414 INFO L482 AbstractCegarLoop]: Abstraction has 6016 states and 14093 transitions. [2021-06-12 22:23:00,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:00,414 INFO L276 IsEmpty]: Start isEmpty. Operand 6016 states and 14093 transitions. [2021-06-12 22:23:00,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:23:00,419 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:00,419 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:00,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1989 [2021-06-12 22:23:00,621 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:00,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:00,621 INFO L82 PathProgramCache]: Analyzing trace with hash -321497981, now seen corresponding path program 126 times [2021-06-12 22:23:00,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:00,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59849610] [2021-06-12 22:23:00,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:00,927 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:00,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:00,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59849610] [2021-06-12 22:23:00,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59849610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:00,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051772859] [2021-06-12 22:23:00,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:00,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:23:00,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:00,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 22:23:00,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:01,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051772859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:01,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:01,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-12 22:23:01,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306585365] [2021-06-12 22:23:01,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 22:23:01,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:01,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 22:23:01,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1244, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:23:01,671 INFO L87 Difference]: Start difference. First operand 6016 states and 14093 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:05,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:05,892 INFO L93 Difference]: Finished difference Result 6444 states and 14954 transitions. [2021-06-12 22:23:05,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-12 22:23:05,893 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:23:05,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:05,897 INFO L225 Difference]: With dead ends: 6444 [2021-06-12 22:23:05,897 INFO L226 Difference]: Without dead ends: 6408 [2021-06-12 22:23:05,898 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2669 ImplicationChecksByTransitivity, 4096.1ms TimeCoverageRelationStatistics Valid=738, Invalid=9564, Unknown=0, NotChecked=0, Total=10302 [2021-06-12 22:23:05,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6408 states. [2021-06-12 22:23:05,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6408 to 6108. [2021-06-12 22:23:05,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6108 states, 6107 states have (on average 2.3430489602095954) internal successors, (14309), 6107 states have internal predecessors, (14309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:05,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6108 states to 6108 states and 14309 transitions. [2021-06-12 22:23:05,952 INFO L78 Accepts]: Start accepts. Automaton has 6108 states and 14309 transitions. Word has length 37 [2021-06-12 22:23:05,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:05,953 INFO L482 AbstractCegarLoop]: Abstraction has 6108 states and 14309 transitions. [2021-06-12 22:23:05,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:05,953 INFO L276 IsEmpty]: Start isEmpty. Operand 6108 states and 14309 transitions. [2021-06-12 22:23:05,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:23:05,958 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:05,958 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:06,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2002 [2021-06-12 22:23:06,165 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:06,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:06,165 INFO L82 PathProgramCache]: Analyzing trace with hash 510926535, now seen corresponding path program 127 times [2021-06-12 22:23:06,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:06,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553040662] [2021-06-12 22:23:06,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:06,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:06,454 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:06,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:06,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553040662] [2021-06-12 22:23:06,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553040662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:06,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925979706] [2021-06-12 22:23:06,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:06,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:06,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 22:23:06,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:07,179 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:07,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925979706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:07,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:07,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-12 22:23:07,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873553104] [2021-06-12 22:23:07,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 22:23:07,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:07,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 22:23:07,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1242, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:23:07,180 INFO L87 Difference]: Start difference. First operand 6108 states and 14309 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:11,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:11,706 INFO L93 Difference]: Finished difference Result 6490 states and 15036 transitions. [2021-06-12 22:23:11,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-12 22:23:11,706 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:23:11,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:11,712 INFO L225 Difference]: With dead ends: 6490 [2021-06-12 22:23:11,712 INFO L226 Difference]: Without dead ends: 6421 [2021-06-12 22:23:11,713 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3060 ImplicationChecksByTransitivity, 4270.8ms TimeCoverageRelationStatistics Valid=882, Invalid=10460, Unknown=0, NotChecked=0, Total=11342 [2021-06-12 22:23:11,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6421 states. [2021-06-12 22:23:11,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6421 to 6086. [2021-06-12 22:23:11,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6086 states, 6085 states have (on average 2.341988496302383) internal successors, (14251), 6085 states have internal predecessors, (14251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:11,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6086 states to 6086 states and 14251 transitions. [2021-06-12 22:23:11,773 INFO L78 Accepts]: Start accepts. Automaton has 6086 states and 14251 transitions. Word has length 37 [2021-06-12 22:23:11,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:11,774 INFO L482 AbstractCegarLoop]: Abstraction has 6086 states and 14251 transitions. [2021-06-12 22:23:11,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:11,774 INFO L276 IsEmpty]: Start isEmpty. Operand 6086 states and 14251 transitions. [2021-06-12 22:23:11,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:23:11,778 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:11,779 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:11,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2021,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:11,979 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:11,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:11,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1467229701, now seen corresponding path program 128 times [2021-06-12 22:23:11,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:11,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112228834] [2021-06-12 22:23:11,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:12,267 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:12,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:12,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112228834] [2021-06-12 22:23:12,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112228834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:12,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232522773] [2021-06-12 22:23:12,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:12,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:23:12,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:12,295 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 22:23:12,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:13,072 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:13,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232522773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:13,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:13,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-12 22:23:13,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613260596] [2021-06-12 22:23:13,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 22:23:13,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:13,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 22:23:13,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1213, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:23:13,073 INFO L87 Difference]: Start difference. First operand 6086 states and 14251 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:16,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:16,118 INFO L93 Difference]: Finished difference Result 6707 states and 15582 transitions. [2021-06-12 22:23:16,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 22:23:16,119 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:23:16,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:16,124 INFO L225 Difference]: With dead ends: 6707 [2021-06-12 22:23:16,125 INFO L226 Difference]: Without dead ends: 6707 [2021-06-12 22:23:16,125 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2481 ImplicationChecksByTransitivity, 3003.6ms TimeCoverageRelationStatistics Valid=745, Invalid=7627, Unknown=0, NotChecked=0, Total=8372 [2021-06-12 22:23:16,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6707 states. [2021-06-12 22:23:16,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6707 to 6194. [2021-06-12 22:23:16,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6194 states, 6193 states have (on average 2.3437752300984984) internal successors, (14515), 6193 states have internal predecessors, (14515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:16,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6194 states to 6194 states and 14515 transitions. [2021-06-12 22:23:16,187 INFO L78 Accepts]: Start accepts. Automaton has 6194 states and 14515 transitions. Word has length 37 [2021-06-12 22:23:16,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:16,188 INFO L482 AbstractCegarLoop]: Abstraction has 6194 states and 14515 transitions. [2021-06-12 22:23:16,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:16,188 INFO L276 IsEmpty]: Start isEmpty. Operand 6194 states and 14515 transitions. [2021-06-12 22:23:16,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:23:16,192 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:16,192 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:16,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2048 [2021-06-12 22:23:16,393 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:16,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:16,393 INFO L82 PathProgramCache]: Analyzing trace with hash -371186881, now seen corresponding path program 129 times [2021-06-12 22:23:16,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:16,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338449197] [2021-06-12 22:23:16,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:16,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:16,657 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:16,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:16,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338449197] [2021-06-12 22:23:16,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338449197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:16,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894062761] [2021-06-12 22:23:16,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:16,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:23:16,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:16,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:23:16,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:17,332 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:17,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894062761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:17,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:17,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-12 22:23:17,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679749408] [2021-06-12 22:23:17,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 22:23:17,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:17,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 22:23:17,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:23:17,333 INFO L87 Difference]: Start difference. First operand 6194 states and 14515 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:21,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:21,179 INFO L93 Difference]: Finished difference Result 6899 states and 15927 transitions. [2021-06-12 22:23:21,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-12 22:23:21,179 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:23:21,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:21,184 INFO L225 Difference]: With dead ends: 6899 [2021-06-12 22:23:21,184 INFO L226 Difference]: Without dead ends: 6848 [2021-06-12 22:23:21,185 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2881 ImplicationChecksByTransitivity, 3574.9ms TimeCoverageRelationStatistics Valid=676, Invalid=9626, Unknown=0, NotChecked=0, Total=10302 [2021-06-12 22:23:21,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6848 states. [2021-06-12 22:23:21,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6848 to 6222. [2021-06-12 22:23:21,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6222 states, 6221 states have (on average 2.344639125542517) internal successors, (14586), 6221 states have internal predecessors, (14586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:21,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6222 states to 6222 states and 14586 transitions. [2021-06-12 22:23:21,247 INFO L78 Accepts]: Start accepts. Automaton has 6222 states and 14586 transitions. Word has length 37 [2021-06-12 22:23:21,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:21,247 INFO L482 AbstractCegarLoop]: Abstraction has 6222 states and 14586 transitions. [2021-06-12 22:23:21,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:21,247 INFO L276 IsEmpty]: Start isEmpty. Operand 6222 states and 14586 transitions. [2021-06-12 22:23:21,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:23:21,252 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:21,252 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:21,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2070 [2021-06-12 22:23:21,458 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:21,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:21,458 INFO L82 PathProgramCache]: Analyzing trace with hash 461237635, now seen corresponding path program 130 times [2021-06-12 22:23:21,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:21,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274604958] [2021-06-12 22:23:21,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:21,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:21,722 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:21,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:21,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274604958] [2021-06-12 22:23:21,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274604958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:21,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112055232] [2021-06-12 22:23:21,722 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:21,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:23:21,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:21,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 22:23:21,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:22,448 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:22,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112055232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:22,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:22,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-12 22:23:22,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968605902] [2021-06-12 22:23:22,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 22:23:22,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:22,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 22:23:22,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1241, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:23:22,449 INFO L87 Difference]: Start difference. First operand 6222 states and 14586 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:27,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:27,928 INFO L93 Difference]: Finished difference Result 6675 states and 15477 transitions. [2021-06-12 22:23:27,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-12 22:23:27,928 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:23:27,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:27,933 INFO L225 Difference]: With dead ends: 6675 [2021-06-12 22:23:27,933 INFO L226 Difference]: Without dead ends: 6603 [2021-06-12 22:23:27,933 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4586 ImplicationChecksByTransitivity, 5107.1ms TimeCoverageRelationStatistics Valid=1103, Invalid=14397, Unknown=0, NotChecked=0, Total=15500 [2021-06-12 22:23:27,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6603 states. [2021-06-12 22:23:27,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6603 to 6260. [2021-06-12 22:23:27,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6260 states, 6259 states have (on average 2.3447835117430897) internal successors, (14676), 6259 states have internal predecessors, (14676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:27,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6260 states to 6260 states and 14676 transitions. [2021-06-12 22:23:27,993 INFO L78 Accepts]: Start accepts. Automaton has 6260 states and 14676 transitions. Word has length 37 [2021-06-12 22:23:27,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:27,993 INFO L482 AbstractCegarLoop]: Abstraction has 6260 states and 14676 transitions. [2021-06-12 22:23:27,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:27,993 INFO L276 IsEmpty]: Start isEmpty. Operand 6260 states and 14676 transitions. [2021-06-12 22:23:27,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:23:27,998 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:27,998 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:28,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2096,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:28,198 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:28,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:28,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1488555781, now seen corresponding path program 131 times [2021-06-12 22:23:28,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:28,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138593933] [2021-06-12 22:23:28,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:28,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:28,465 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:28,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:28,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138593933] [2021-06-12 22:23:28,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138593933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:28,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365836790] [2021-06-12 22:23:28,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:28,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 22:23:28,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:28,493 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 22:23:28,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:29,219 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:29,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365836790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:29,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:29,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-06-12 22:23:29,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025631131] [2021-06-12 22:23:29,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 22:23:29,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:29,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 22:23:29,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 22:23:29,220 INFO L87 Difference]: Start difference. First operand 6260 states and 14676 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:31,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:31,558 INFO L93 Difference]: Finished difference Result 6797 states and 15791 transitions. [2021-06-12 22:23:31,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 22:23:31,559 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:23:31,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:31,564 INFO L225 Difference]: With dead ends: 6797 [2021-06-12 22:23:31,564 INFO L226 Difference]: Without dead ends: 6755 [2021-06-12 22:23:31,565 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2041 ImplicationChecksByTransitivity, 2415.9ms TimeCoverageRelationStatistics Valid=725, Invalid=6415, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 22:23:31,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6755 states. [2021-06-12 22:23:31,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6755 to 6340. [2021-06-12 22:23:31,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6340 states, 6339 states have (on average 2.3420097807225115) internal successors, (14846), 6339 states have internal predecessors, (14846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:31,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6340 states to 6340 states and 14846 transitions. [2021-06-12 22:23:31,627 INFO L78 Accepts]: Start accepts. Automaton has 6340 states and 14846 transitions. Word has length 37 [2021-06-12 22:23:31,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:31,627 INFO L482 AbstractCegarLoop]: Abstraction has 6340 states and 14846 transitions. [2021-06-12 22:23:31,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:31,627 INFO L276 IsEmpty]: Start isEmpty. Operand 6340 states and 14846 transitions. [2021-06-12 22:23:31,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:23:31,633 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:31,633 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:31,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2116 [2021-06-12 22:23:31,833 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:31,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:31,833 INFO L82 PathProgramCache]: Analyzing trace with hash -784873853, now seen corresponding path program 132 times [2021-06-12 22:23:31,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:31,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614386577] [2021-06-12 22:23:31,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:31,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:32,102 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:32,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:32,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614386577] [2021-06-12 22:23:32,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614386577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:32,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631337345] [2021-06-12 22:23:32,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:32,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:23:32,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:32,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:23:32,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:32,755 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:32,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631337345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:32,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:32,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-12 22:23:32,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548931591] [2021-06-12 22:23:32,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 22:23:32,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:32,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 22:23:32,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:23:32,756 INFO L87 Difference]: Start difference. First operand 6340 states and 14846 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:47,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:47,345 INFO L93 Difference]: Finished difference Result 8496 states and 19273 transitions. [2021-06-12 22:23:47,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 250 states. [2021-06-12 22:23:47,345 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:23:47,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:47,352 INFO L225 Difference]: With dead ends: 8496 [2021-06-12 22:23:47,352 INFO L226 Difference]: Without dead ends: 8484 [2021-06-12 22:23:47,355 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28541 ImplicationChecksByTransitivity, 13392.4ms TimeCoverageRelationStatistics Valid=5449, Invalid=67181, Unknown=0, NotChecked=0, Total=72630 [2021-06-12 22:23:47,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8484 states. [2021-06-12 22:23:47,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8484 to 6370. [2021-06-12 22:23:47,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6370 states, 6369 states have (on average 2.342282932956508) internal successors, (14918), 6369 states have internal predecessors, (14918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:47,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6370 states to 6370 states and 14918 transitions. [2021-06-12 22:23:47,443 INFO L78 Accepts]: Start accepts. Automaton has 6370 states and 14918 transitions. Word has length 37 [2021-06-12 22:23:47,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:47,443 INFO L482 AbstractCegarLoop]: Abstraction has 6370 states and 14918 transitions. [2021-06-12 22:23:47,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:47,443 INFO L276 IsEmpty]: Start isEmpty. Operand 6370 states and 14918 transitions. [2021-06-12 22:23:47,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:23:47,448 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:47,448 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:47,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2132,133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:47,649 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:47,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:47,649 INFO L82 PathProgramCache]: Analyzing trace with hash -134804883, now seen corresponding path program 133 times [2021-06-12 22:23:47,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:47,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499050836] [2021-06-12 22:23:47,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:47,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:47,920 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:47,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:47,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499050836] [2021-06-12 22:23:47,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499050836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:47,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181111621] [2021-06-12 22:23:47,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:47,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:47,945 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 22:23:47,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:48,670 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:48,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181111621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:48,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:48,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2021-06-12 22:23:48,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641653343] [2021-06-12 22:23:48,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 22:23:48,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:48,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 22:23:48,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1134, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:23:48,671 INFO L87 Difference]: Start difference. First operand 6370 states and 14918 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:51,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:51,097 INFO L93 Difference]: Finished difference Result 6909 states and 15987 transitions. [2021-06-12 22:23:51,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 22:23:51,097 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:23:51,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:51,103 INFO L225 Difference]: With dead ends: 6909 [2021-06-12 22:23:51,103 INFO L226 Difference]: Without dead ends: 6891 [2021-06-12 22:23:51,103 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 2283.1ms TimeCoverageRelationStatistics Valid=553, Invalid=5299, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 22:23:51,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6891 states. [2021-06-12 22:23:51,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6891 to 6452. [2021-06-12 22:23:51,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6452 states, 6451 states have (on average 2.3432026042474035) internal successors, (15116), 6451 states have internal predecessors, (15116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:51,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6452 states to 6452 states and 15116 transitions. [2021-06-12 22:23:51,168 INFO L78 Accepts]: Start accepts. Automaton has 6452 states and 15116 transitions. Word has length 37 [2021-06-12 22:23:51,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:51,168 INFO L482 AbstractCegarLoop]: Abstraction has 6452 states and 15116 transitions. [2021-06-12 22:23:51,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:51,168 INFO L276 IsEmpty]: Start isEmpty. Operand 6452 states and 15116 transitions. [2021-06-12 22:23:51,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:23:51,173 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:51,173 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:51,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2167 [2021-06-12 22:23:51,374 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:51,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:51,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1908066299, now seen corresponding path program 134 times [2021-06-12 22:23:51,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:51,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034687353] [2021-06-12 22:23:51,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:51,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:51,641 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:51,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:51,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034687353] [2021-06-12 22:23:51,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034687353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:51,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990398745] [2021-06-12 22:23:51,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:51,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:23:51,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:51,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 22:23:51,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:52,332 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:52,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990398745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:52,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:52,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2021-06-12 22:23:52,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905165266] [2021-06-12 22:23:52,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 22:23:52,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:52,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 22:23:52,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:23:52,333 INFO L87 Difference]: Start difference. First operand 6452 states and 15116 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:56,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:56,307 INFO L93 Difference]: Finished difference Result 8689 states and 20145 transitions. [2021-06-12 22:23:56,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-12 22:23:56,307 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:23:56,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:56,315 INFO L225 Difference]: With dead ends: 8689 [2021-06-12 22:23:56,315 INFO L226 Difference]: Without dead ends: 8655 [2021-06-12 22:23:56,316 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3911 ImplicationChecksByTransitivity, 3756.0ms TimeCoverageRelationStatistics Valid=1429, Invalid=10781, Unknown=0, NotChecked=0, Total=12210 [2021-06-12 22:23:56,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8655 states. [2021-06-12 22:23:56,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8655 to 6530. [2021-06-12 22:23:56,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6530 states, 6529 states have (on average 2.342165722162659) internal successors, (15292), 6529 states have internal predecessors, (15292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:56,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6530 states to 6530 states and 15292 transitions. [2021-06-12 22:23:56,393 INFO L78 Accepts]: Start accepts. Automaton has 6530 states and 15292 transitions. Word has length 37 [2021-06-12 22:23:56,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:56,394 INFO L482 AbstractCegarLoop]: Abstraction has 6530 states and 15292 transitions. [2021-06-12 22:23:56,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:56,394 INFO L276 IsEmpty]: Start isEmpty. Operand 6530 states and 15292 transitions. [2021-06-12 22:23:56,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:23:56,400 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:56,401 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:56,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2185,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:56,601 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:56,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:56,601 INFO L82 PathProgramCache]: Analyzing trace with hash -605365953, now seen corresponding path program 135 times [2021-06-12 22:23:56,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:56,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036666287] [2021-06-12 22:23:56,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:56,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:56,866 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:56,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:56,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036666287] [2021-06-12 22:23:56,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036666287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:56,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61308772] [2021-06-12 22:23:56,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:56,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:23:56,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:56,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:23:56,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:57,263 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:57,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61308772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:57,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:57,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 31 [2021-06-12 22:23:57,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437059305] [2021-06-12 22:23:57,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 22:23:57,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:57,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 22:23:57,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:23:57,264 INFO L87 Difference]: Start difference. First operand 6530 states and 15292 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:01,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:01,295 INFO L93 Difference]: Finished difference Result 8866 states and 20480 transitions. [2021-06-12 22:24:01,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-12 22:24:01,295 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:24:01,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:01,302 INFO L225 Difference]: With dead ends: 8866 [2021-06-12 22:24:01,302 INFO L226 Difference]: Without dead ends: 8800 [2021-06-12 22:24:01,303 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3379 ImplicationChecksByTransitivity, 3266.5ms TimeCoverageRelationStatistics Valid=1022, Invalid=10534, Unknown=0, NotChecked=0, Total=11556 [2021-06-12 22:24:01,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8800 states. [2021-06-12 22:24:01,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8800 to 6612. [2021-06-12 22:24:01,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6612 states, 6611 states have (on average 2.341249432763576) internal successors, (15478), 6611 states have internal predecessors, (15478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:01,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6612 states to 6612 states and 15478 transitions. [2021-06-12 22:24:01,374 INFO L78 Accepts]: Start accepts. Automaton has 6612 states and 15478 transitions. Word has length 37 [2021-06-12 22:24:01,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:01,374 INFO L482 AbstractCegarLoop]: Abstraction has 6612 states and 15478 transitions. [2021-06-12 22:24:01,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:01,374 INFO L276 IsEmpty]: Start isEmpty. Operand 6612 states and 15478 transitions. [2021-06-12 22:24:01,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:24:01,380 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:01,380 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:01,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2209 [2021-06-12 22:24:01,581 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:01,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:01,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1064850861, now seen corresponding path program 136 times [2021-06-12 22:24:01,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:01,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633642168] [2021-06-12 22:24:01,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:01,840 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:01,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:01,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633642168] [2021-06-12 22:24:01,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633642168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:01,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580924615] [2021-06-12 22:24:01,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:01,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:24:01,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:01,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:24:01,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:02,251 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:24:02,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580924615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:02,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:02,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 31 [2021-06-12 22:24:02,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158305715] [2021-06-12 22:24:02,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 22:24:02,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:02,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 22:24:02,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:24:02,252 INFO L87 Difference]: Start difference. First operand 6612 states and 15478 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:07,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:07,140 INFO L93 Difference]: Finished difference Result 10348 states and 23647 transitions. [2021-06-12 22:24:07,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-12 22:24:07,140 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:24:07,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:07,148 INFO L225 Difference]: With dead ends: 10348 [2021-06-12 22:24:07,148 INFO L226 Difference]: Without dead ends: 10305 [2021-06-12 22:24:07,149 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4756 ImplicationChecksByTransitivity, 4070.1ms TimeCoverageRelationStatistics Valid=1422, Invalid=13830, Unknown=0, NotChecked=0, Total=15252 [2021-06-12 22:24:07,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10305 states. [2021-06-12 22:24:07,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10305 to 6781. [2021-06-12 22:24:07,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6781 states, 6780 states have (on average 2.344395280235988) internal successors, (15895), 6780 states have internal predecessors, (15895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:07,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6781 states to 6781 states and 15895 transitions. [2021-06-12 22:24:07,223 INFO L78 Accepts]: Start accepts. Automaton has 6781 states and 15895 transitions. Word has length 37 [2021-06-12 22:24:07,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:07,223 INFO L482 AbstractCegarLoop]: Abstraction has 6781 states and 15895 transitions. [2021-06-12 22:24:07,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:07,223 INFO L276 IsEmpty]: Start isEmpty. Operand 6781 states and 15895 transitions. [2021-06-12 22:24:07,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:24:07,229 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:07,229 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:07,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2218,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:07,429 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:07,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:07,429 INFO L82 PathProgramCache]: Analyzing trace with hash 535237559, now seen corresponding path program 137 times [2021-06-12 22:24:07,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:07,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023725207] [2021-06-12 22:24:07,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:07,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:07,687 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:07,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:07,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023725207] [2021-06-12 22:24:07,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023725207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:07,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752504020] [2021-06-12 22:24:07,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:07,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 22:24:07,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:07,715 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 22:24:07,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:08,404 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:08,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752504020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:08,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:08,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2021-06-12 22:24:08,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425943737] [2021-06-12 22:24:08,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 22:24:08,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:08,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 22:24:08,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1254, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 22:24:08,405 INFO L87 Difference]: Start difference. First operand 6781 states and 15895 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:10,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:10,740 INFO L93 Difference]: Finished difference Result 7588 states and 17601 transitions. [2021-06-12 22:24:10,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 22:24:10,740 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:24:10,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:10,748 INFO L225 Difference]: With dead ends: 7588 [2021-06-12 22:24:10,748 INFO L226 Difference]: Without dead ends: 7588 [2021-06-12 22:24:10,748 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2433 ImplicationChecksByTransitivity, 2284.8ms TimeCoverageRelationStatistics Valid=839, Invalid=7171, Unknown=0, NotChecked=0, Total=8010 [2021-06-12 22:24:10,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7588 states. [2021-06-12 22:24:10,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7588 to 6907. [2021-06-12 22:24:10,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6907 states, 6906 states have (on average 2.347958297132928) internal successors, (16215), 6906 states have internal predecessors, (16215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:10,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6907 states to 6907 states and 16215 transitions. [2021-06-12 22:24:10,827 INFO L78 Accepts]: Start accepts. Automaton has 6907 states and 16215 transitions. Word has length 37 [2021-06-12 22:24:10,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:10,827 INFO L482 AbstractCegarLoop]: Abstraction has 6907 states and 16215 transitions. [2021-06-12 22:24:10,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:10,827 INFO L276 IsEmpty]: Start isEmpty. Operand 6907 states and 16215 transitions. [2021-06-12 22:24:10,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:24:10,833 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:10,833 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:11,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2228 [2021-06-12 22:24:11,033 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:11,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:11,034 INFO L82 PathProgramCache]: Analyzing trace with hash 596039863, now seen corresponding path program 138 times [2021-06-12 22:24:11,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:11,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967142981] [2021-06-12 22:24:11,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:11,290 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:11,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:11,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967142981] [2021-06-12 22:24:11,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967142981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:11,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847218571] [2021-06-12 22:24:11,291 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:11,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:24:11,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:11,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 22:24:11,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:11,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847218571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:11,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:11,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2021-06-12 22:24:11,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792361353] [2021-06-12 22:24:11,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 22:24:11,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:11,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 22:24:11,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:24:11,951 INFO L87 Difference]: Start difference. First operand 6907 states and 16215 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:16,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:16,913 INFO L93 Difference]: Finished difference Result 9465 states and 21940 transitions. [2021-06-12 22:24:16,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-12 22:24:16,914 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:24:16,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:16,921 INFO L225 Difference]: With dead ends: 9465 [2021-06-12 22:24:16,921 INFO L226 Difference]: Without dead ends: 9404 [2021-06-12 22:24:16,922 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4905 ImplicationChecksByTransitivity, 4630.4ms TimeCoverageRelationStatistics Valid=1741, Invalid=13021, Unknown=0, NotChecked=0, Total=14762 [2021-06-12 22:24:16,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9404 states. [2021-06-12 22:24:16,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9404 to 7012. [2021-06-12 22:24:16,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7012 states, 7011 states have (on average 2.3451718727713593) internal successors, (16442), 7011 states have internal predecessors, (16442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:16,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7012 states to 7012 states and 16442 transitions. [2021-06-12 22:24:16,997 INFO L78 Accepts]: Start accepts. Automaton has 7012 states and 16442 transitions. Word has length 37 [2021-06-12 22:24:16,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:16,997 INFO L482 AbstractCegarLoop]: Abstraction has 7012 states and 16442 transitions. [2021-06-12 22:24:16,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:16,997 INFO L276 IsEmpty]: Start isEmpty. Operand 7012 states and 16442 transitions. [2021-06-12 22:24:17,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:24:17,003 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:17,003 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:17,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2247 [2021-06-12 22:24:17,204 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:17,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:17,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1294610557, now seen corresponding path program 139 times [2021-06-12 22:24:17,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:17,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570854733] [2021-06-12 22:24:17,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:17,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:17,446 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:17,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:17,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570854733] [2021-06-12 22:24:17,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570854733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:17,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010200311] [2021-06-12 22:24:17,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:17,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:17,471 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-12 22:24:17,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:18,114 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:18,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010200311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:18,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:18,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-12 22:24:18,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448111552] [2021-06-12 22:24:18,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 22:24:18,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:18,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 22:24:18,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:24:18,116 INFO L87 Difference]: Start difference. First operand 7012 states and 16442 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:22,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:22,453 INFO L93 Difference]: Finished difference Result 12834 states and 29277 transitions. [2021-06-12 22:24:22,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-12 22:24:22,453 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:24:22,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:22,464 INFO L225 Difference]: With dead ends: 12834 [2021-06-12 22:24:22,464 INFO L226 Difference]: Without dead ends: 12677 [2021-06-12 22:24:22,465 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6069 ImplicationChecksByTransitivity, 4052.8ms TimeCoverageRelationStatistics Valid=2193, Invalid=14319, Unknown=0, NotChecked=0, Total=16512 [2021-06-12 22:24:22,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12677 states. [2021-06-12 22:24:22,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12677 to 7393. [2021-06-12 22:24:22,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7393 states, 7392 states have (on average 2.354707792207792) internal successors, (17406), 7392 states have internal predecessors, (17406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:22,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7393 states to 7393 states and 17406 transitions. [2021-06-12 22:24:22,561 INFO L78 Accepts]: Start accepts. Automaton has 7393 states and 17406 transitions. Word has length 37 [2021-06-12 22:24:22,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:22,561 INFO L482 AbstractCegarLoop]: Abstraction has 7393 states and 17406 transitions. [2021-06-12 22:24:22,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:22,562 INFO L276 IsEmpty]: Start isEmpty. Operand 7393 states and 17406 transitions. [2021-06-12 22:24:22,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:24:22,568 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:22,568 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:22,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2268 [2021-06-12 22:24:22,768 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:22,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:22,768 INFO L82 PathProgramCache]: Analyzing trace with hash 889571579, now seen corresponding path program 140 times [2021-06-12 22:24:22,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:22,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14464032] [2021-06-12 22:24:22,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:22,988 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:24:22,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:22,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14464032] [2021-06-12 22:24:22,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14464032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:22,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047932513] [2021-06-12 22:24:22,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:23,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:24:23,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:23,014 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 22:24:23,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:23,796 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:23,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047932513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:23,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:23,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-06-12 22:24:23,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532871285] [2021-06-12 22:24:23,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-12 22:24:23,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:23,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-12 22:24:23,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 22:24:23,797 INFO L87 Difference]: Start difference. First operand 7393 states and 17406 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:27,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:27,479 INFO L93 Difference]: Finished difference Result 10016 states and 23322 transitions. [2021-06-12 22:24:27,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 22:24:27,479 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:24:27,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:27,487 INFO L225 Difference]: With dead ends: 10016 [2021-06-12 22:24:27,487 INFO L226 Difference]: Without dead ends: 9961 [2021-06-12 22:24:27,488 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 3575.3ms TimeCoverageRelationStatistics Valid=960, Invalid=7050, Unknown=0, NotChecked=0, Total=8010 [2021-06-12 22:24:27,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9961 states. [2021-06-12 22:24:27,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9961 to 7444. [2021-06-12 22:24:27,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7444 states, 7443 states have (on average 2.3526803708182187) internal successors, (17511), 7443 states have internal predecessors, (17511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:27,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7444 states to 7444 states and 17511 transitions. [2021-06-12 22:24:27,573 INFO L78 Accepts]: Start accepts. Automaton has 7444 states and 17511 transitions. Word has length 37 [2021-06-12 22:24:27,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:27,574 INFO L482 AbstractCegarLoop]: Abstraction has 7444 states and 17511 transitions. [2021-06-12 22:24:27,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:27,574 INFO L276 IsEmpty]: Start isEmpty. Operand 7444 states and 17511 transitions. [2021-06-12 22:24:27,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:24:27,580 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:27,580 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:27,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2285,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:27,781 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:27,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:27,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1449579259, now seen corresponding path program 141 times [2021-06-12 22:24:27,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:27,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548490931] [2021-06-12 22:24:27,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:28,043 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:28,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:28,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548490931] [2021-06-12 22:24:28,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548490931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:28,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174334789] [2021-06-12 22:24:28,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:28,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 22:24:28,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:28,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:24:28,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:28,440 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:28,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174334789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:28,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:28,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 32 [2021-06-12 22:24:28,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250428326] [2021-06-12 22:24:28,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 22:24:28,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:28,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 22:24:28,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:24:28,441 INFO L87 Difference]: Start difference. First operand 7444 states and 17511 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:31,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:31,314 INFO L93 Difference]: Finished difference Result 10247 states and 23785 transitions. [2021-06-12 22:24:31,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 22:24:31,315 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:24:31,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:31,324 INFO L225 Difference]: With dead ends: 10247 [2021-06-12 22:24:31,324 INFO L226 Difference]: Without dead ends: 10170 [2021-06-12 22:24:31,325 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 2575.0ms TimeCoverageRelationStatistics Valid=893, Invalid=6589, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 22:24:31,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10170 states. [2021-06-12 22:24:31,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10170 to 7464. [2021-06-12 22:24:31,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7464 states, 7463 states have (on average 2.352405198981643) internal successors, (17556), 7463 states have internal predecessors, (17556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:31,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7464 states to 7464 states and 17556 transitions. [2021-06-12 22:24:31,414 INFO L78 Accepts]: Start accepts. Automaton has 7464 states and 17556 transitions. Word has length 37 [2021-06-12 22:24:31,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:31,414 INFO L482 AbstractCegarLoop]: Abstraction has 7464 states and 17556 transitions. [2021-06-12 22:24:31,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:31,414 INFO L276 IsEmpty]: Start isEmpty. Operand 7464 states and 17556 transitions. [2021-06-12 22:24:31,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:24:31,420 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:31,420 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:31,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2307 [2021-06-12 22:24:31,621 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:31,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:31,621 INFO L82 PathProgramCache]: Analyzing trace with hash 380397771, now seen corresponding path program 142 times [2021-06-12 22:24:31,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:31,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867650476] [2021-06-12 22:24:31,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:31,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:31,928 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:31,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:31,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867650476] [2021-06-12 22:24:31,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867650476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:31,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778702069] [2021-06-12 22:24:31,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:31,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:24:31,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:31,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 22:24:31,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:32,494 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:32,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778702069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:32,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:32,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 31 [2021-06-12 22:24:32,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825616929] [2021-06-12 22:24:32,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 22:24:32,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:32,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 22:24:32,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:24:32,495 INFO L87 Difference]: Start difference. First operand 7464 states and 17556 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:35,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:35,247 INFO L93 Difference]: Finished difference Result 11331 states and 26458 transitions. [2021-06-12 22:24:35,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 22:24:35,247 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:24:35,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:35,274 INFO L225 Difference]: With dead ends: 11331 [2021-06-12 22:24:35,274 INFO L226 Difference]: Without dead ends: 11256 [2021-06-12 22:24:35,274 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2151 ImplicationChecksByTransitivity, 2736.1ms TimeCoverageRelationStatistics Valid=1062, Invalid=6078, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 22:24:35,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11256 states. [2021-06-12 22:24:35,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11256 to 8172. [2021-06-12 22:24:35,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8172 states, 8171 states have (on average 2.3583404724023986) internal successors, (19270), 8171 states have internal predecessors, (19270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:35,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8172 states to 8172 states and 19270 transitions. [2021-06-12 22:24:35,363 INFO L78 Accepts]: Start accepts. Automaton has 8172 states and 19270 transitions. Word has length 37 [2021-06-12 22:24:35,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:35,363 INFO L482 AbstractCegarLoop]: Abstraction has 8172 states and 19270 transitions. [2021-06-12 22:24:35,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:35,363 INFO L276 IsEmpty]: Start isEmpty. Operand 8172 states and 19270 transitions. [2021-06-12 22:24:35,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:24:35,369 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:35,369 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:35,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2316 [2021-06-12 22:24:35,570 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:35,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:35,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1713251961, now seen corresponding path program 143 times [2021-06-12 22:24:35,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:35,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410706634] [2021-06-12 22:24:35,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:35,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:35,835 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:35,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:35,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410706634] [2021-06-12 22:24:35,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410706634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:35,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744339259] [2021-06-12 22:24:35,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:35,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 22:24:35,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:35,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 22:24:35,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:24:36,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744339259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:36,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:36,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 32 [2021-06-12 22:24:36,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324838975] [2021-06-12 22:24:36,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 22:24:36,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:36,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 22:24:36,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:24:36,425 INFO L87 Difference]: Start difference. First operand 8172 states and 19270 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:41,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:41,074 INFO L93 Difference]: Finished difference Result 11271 states and 26216 transitions. [2021-06-12 22:24:41,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-12 22:24:41,074 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:24:41,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:41,084 INFO L225 Difference]: With dead ends: 11271 [2021-06-12 22:24:41,084 INFO L226 Difference]: Without dead ends: 11205 [2021-06-12 22:24:41,085 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 4367.5ms TimeCoverageRelationStatistics Valid=1180, Invalid=8326, Unknown=0, NotChecked=0, Total=9506 [2021-06-12 22:24:41,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11205 states. [2021-06-12 22:24:41,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11205 to 8408. [2021-06-12 22:24:41,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8408 states, 8407 states have (on average 2.3495896276912096) internal successors, (19753), 8407 states have internal predecessors, (19753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:41,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8408 states to 8408 states and 19753 transitions. [2021-06-12 22:24:41,183 INFO L78 Accepts]: Start accepts. Automaton has 8408 states and 19753 transitions. Word has length 37 [2021-06-12 22:24:41,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:41,184 INFO L482 AbstractCegarLoop]: Abstraction has 8408 states and 19753 transitions. [2021-06-12 22:24:41,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:41,184 INFO L276 IsEmpty]: Start isEmpty. Operand 8408 states and 19753 transitions. [2021-06-12 22:24:41,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:24:41,190 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:41,190 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:41,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2336,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:41,393 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:41,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:41,393 INFO L82 PathProgramCache]: Analyzing trace with hash -787483265, now seen corresponding path program 144 times [2021-06-12 22:24:41,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:41,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465989508] [2021-06-12 22:24:41,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:41,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:41,699 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:41,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:41,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465989508] [2021-06-12 22:24:41,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465989508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:41,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050468236] [2021-06-12 22:24:41,700 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:41,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 22:24:41,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:41,727 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-12 22:24:41,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:42,528 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:42,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050468236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:42,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:42,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-12 22:24:42,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233113137] [2021-06-12 22:24:42,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 22:24:42,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:42,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 22:24:42,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1208, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:24:42,529 INFO L87 Difference]: Start difference. First operand 8408 states and 19753 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:45,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:45,152 INFO L93 Difference]: Finished difference Result 9319 states and 21711 transitions. [2021-06-12 22:24:45,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 22:24:45,153 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:24:45,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:45,162 INFO L225 Difference]: With dead ends: 9319 [2021-06-12 22:24:45,162 INFO L226 Difference]: Without dead ends: 9265 [2021-06-12 22:24:45,163 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1958 ImplicationChecksByTransitivity, 2515.4ms TimeCoverageRelationStatistics Valid=595, Invalid=6211, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 22:24:45,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9265 states. [2021-06-12 22:24:45,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9265 to 8562. [2021-06-12 22:24:45,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8562 states, 8561 states have (on average 2.3510103959817776) internal successors, (20127), 8561 states have internal predecessors, (20127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:45,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8562 states to 8562 states and 20127 transitions. [2021-06-12 22:24:45,266 INFO L78 Accepts]: Start accepts. Automaton has 8562 states and 20127 transitions. Word has length 37 [2021-06-12 22:24:45,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:45,266 INFO L482 AbstractCegarLoop]: Abstraction has 8562 states and 20127 transitions. [2021-06-12 22:24:45,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:45,266 INFO L276 IsEmpty]: Start isEmpty. Operand 8562 states and 20127 transitions. [2021-06-12 22:24:45,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:24:45,273 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:45,273 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:45,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2356 [2021-06-12 22:24:45,473 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:45,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:45,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1338722055, now seen corresponding path program 145 times [2021-06-12 22:24:45,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:45,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026909944] [2021-06-12 22:24:45,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:45,777 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:45,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:45,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026909944] [2021-06-12 22:24:45,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026909944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:45,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963619066] [2021-06-12 22:24:45,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:45,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:45,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:24:45,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:46,555 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:46,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963619066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:46,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:46,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-12 22:24:46,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177533216] [2021-06-12 22:24:46,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 22:24:46,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:46,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 22:24:46,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:24:46,556 INFO L87 Difference]: Start difference. First operand 8562 states and 20127 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:52,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:52,808 INFO L93 Difference]: Finished difference Result 9415 states and 21837 transitions. [2021-06-12 22:24:52,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-06-12 22:24:52,808 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:24:52,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:52,817 INFO L225 Difference]: With dead ends: 9415 [2021-06-12 22:24:52,817 INFO L226 Difference]: Without dead ends: 9370 [2021-06-12 22:24:52,818 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5155 ImplicationChecksByTransitivity, 5529.8ms TimeCoverageRelationStatistics Valid=927, Invalid=15329, Unknown=0, NotChecked=0, Total=16256 [2021-06-12 22:24:52,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9370 states. [2021-06-12 22:24:52,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9370 to 8678. [2021-06-12 22:24:52,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8678 states, 8677 states have (on average 2.355076639391495) internal successors, (20435), 8677 states have internal predecessors, (20435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:52,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8678 states to 8678 states and 20435 transitions. [2021-06-12 22:24:52,910 INFO L78 Accepts]: Start accepts. Automaton has 8678 states and 20435 transitions. Word has length 37 [2021-06-12 22:24:52,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:52,910 INFO L482 AbstractCegarLoop]: Abstraction has 8678 states and 20435 transitions. [2021-06-12 22:24:52,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:52,911 INFO L276 IsEmpty]: Start isEmpty. Operand 8678 states and 20435 transitions. [2021-06-12 22:24:52,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:24:52,918 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:52,918 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:53,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2374,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:53,118 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:53,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:53,118 INFO L82 PathProgramCache]: Analyzing trace with hash -2123820725, now seen corresponding path program 146 times [2021-06-12 22:24:53,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:53,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798424894] [2021-06-12 22:24:53,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:53,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:53,420 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:53,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:53,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798424894] [2021-06-12 22:24:53,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798424894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:53,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130009251] [2021-06-12 22:24:53,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:53,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:24:53,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:53,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 22:24:53,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:54,083 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:54,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130009251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:54,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:54,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 35 [2021-06-12 22:24:54,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14042028] [2021-06-12 22:24:54,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 22:24:54,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:54,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 22:24:54,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1170, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:24:54,084 INFO L87 Difference]: Start difference. First operand 8678 states and 20435 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:00,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:00,367 INFO L93 Difference]: Finished difference Result 9447 states and 21893 transitions. [2021-06-12 22:25:00,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-12 22:25:00,368 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:25:00,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:00,376 INFO L225 Difference]: With dead ends: 9447 [2021-06-12 22:25:00,376 INFO L226 Difference]: Without dead ends: 9429 [2021-06-12 22:25:00,377 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 5421.1ms TimeCoverageRelationStatistics Valid=962, Invalid=14290, Unknown=0, NotChecked=0, Total=15252 [2021-06-12 22:25:00,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9429 states. [2021-06-12 22:25:00,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9429 to 8687. [2021-06-12 22:25:00,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8687 states, 8686 states have (on average 2.354823854478471) internal successors, (20454), 8686 states have internal predecessors, (20454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:00,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8687 states to 8687 states and 20454 transitions. [2021-06-12 22:25:00,473 INFO L78 Accepts]: Start accepts. Automaton has 8687 states and 20454 transitions. Word has length 37 [2021-06-12 22:25:00,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:00,473 INFO L482 AbstractCegarLoop]: Abstraction has 8687 states and 20454 transitions. [2021-06-12 22:25:00,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:00,473 INFO L276 IsEmpty]: Start isEmpty. Operand 8687 states and 20454 transitions. [2021-06-12 22:25:00,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:25:00,480 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:00,480 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:00,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2406 [2021-06-12 22:25:00,681 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:00,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:00,681 INFO L82 PathProgramCache]: Analyzing trace with hash 2042403983, now seen corresponding path program 147 times [2021-06-12 22:25:00,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:00,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65258561] [2021-06-12 22:25:00,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:00,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:01,011 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:01,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:01,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65258561] [2021-06-12 22:25:01,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65258561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:01,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466329818] [2021-06-12 22:25:01,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:01,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 22:25:01,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:01,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 22:25:01,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:01,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466329818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:01,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:01,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 32 [2021-06-12 22:25:01,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053423955] [2021-06-12 22:25:01,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 22:25:01,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:01,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 22:25:01,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:25:01,415 INFO L87 Difference]: Start difference. First operand 8687 states and 20454 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:06,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:06,842 INFO L93 Difference]: Finished difference Result 10286 states and 23827 transitions. [2021-06-12 22:25:06,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-12 22:25:06,842 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:25:06,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:06,853 INFO L225 Difference]: With dead ends: 10286 [2021-06-12 22:25:06,853 INFO L226 Difference]: Without dead ends: 10163 [2021-06-12 22:25:06,854 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4593 ImplicationChecksByTransitivity, 4508.9ms TimeCoverageRelationStatistics Valid=1527, Invalid=14223, Unknown=0, NotChecked=0, Total=15750 [2021-06-12 22:25:06,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10163 states. [2021-06-12 22:25:06,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10163 to 8213. [2021-06-12 22:25:06,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8213 states, 8212 states have (on average 2.32501217730151) internal successors, (19093), 8212 states have internal predecessors, (19093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:06,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8213 states to 8213 states and 19093 transitions. [2021-06-12 22:25:06,958 INFO L78 Accepts]: Start accepts. Automaton has 8213 states and 19093 transitions. Word has length 37 [2021-06-12 22:25:06,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:06,958 INFO L482 AbstractCegarLoop]: Abstraction has 8213 states and 19093 transitions. [2021-06-12 22:25:06,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:06,958 INFO L276 IsEmpty]: Start isEmpty. Operand 8213 states and 19093 transitions. [2021-06-12 22:25:06,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:25:06,966 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:06,966 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:07,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2437,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:07,182 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:07,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:07,182 INFO L82 PathProgramCache]: Analyzing trace with hash -726680961, now seen corresponding path program 148 times [2021-06-12 22:25:07,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:07,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628637845] [2021-06-12 22:25:07,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:07,490 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:07,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:07,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628637845] [2021-06-12 22:25:07,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628637845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:07,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437473543] [2021-06-12 22:25:07,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:07,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:25:07,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:07,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 22:25:07,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:08,153 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:08,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437473543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:08,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:08,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2021-06-12 22:25:08,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225948300] [2021-06-12 22:25:08,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 22:25:08,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:08,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 22:25:08,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:25:08,154 INFO L87 Difference]: Start difference. First operand 8213 states and 19093 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:11,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:11,084 INFO L93 Difference]: Finished difference Result 10792 states and 24889 transitions. [2021-06-12 22:25:11,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 22:25:11,084 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:25:11,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:11,094 INFO L225 Difference]: With dead ends: 10792 [2021-06-12 22:25:11,094 INFO L226 Difference]: Without dead ends: 10724 [2021-06-12 22:25:11,095 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2275 ImplicationChecksByTransitivity, 2741.2ms TimeCoverageRelationStatistics Valid=745, Invalid=7087, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 22:25:11,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10724 states. [2021-06-12 22:25:11,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10724 to 8396. [2021-06-12 22:25:11,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8396 states, 8395 states have (on average 2.321262656343061) internal successors, (19487), 8395 states have internal predecessors, (19487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:11,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8396 states to 8396 states and 19487 transitions. [2021-06-12 22:25:11,195 INFO L78 Accepts]: Start accepts. Automaton has 8396 states and 19487 transitions. Word has length 37 [2021-06-12 22:25:11,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:11,195 INFO L482 AbstractCegarLoop]: Abstraction has 8396 states and 19487 transitions. [2021-06-12 22:25:11,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:11,195 INFO L276 IsEmpty]: Start isEmpty. Operand 8396 states and 19487 transitions. [2021-06-12 22:25:11,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:25:11,227 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:11,227 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:11,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2454 [2021-06-12 22:25:11,428 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:11,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:11,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1054854083, now seen corresponding path program 149 times [2021-06-12 22:25:11,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:11,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886447939] [2021-06-12 22:25:11,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:11,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:11,726 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:11,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:11,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886447939] [2021-06-12 22:25:11,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886447939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:11,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878160039] [2021-06-12 22:25:11,726 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:11,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 22:25:11,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:11,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 22:25:11,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:12,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878160039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:12,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:12,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2021-06-12 22:25:12,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14592761] [2021-06-12 22:25:12,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 22:25:12,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:12,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 22:25:12,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:25:12,370 INFO L87 Difference]: Start difference. First operand 8396 states and 19487 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:16,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:16,303 INFO L93 Difference]: Finished difference Result 11349 states and 26070 transitions. [2021-06-12 22:25:16,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 22:25:16,304 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:25:16,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:16,315 INFO L225 Difference]: With dead ends: 11349 [2021-06-12 22:25:16,315 INFO L226 Difference]: Without dead ends: 11303 [2021-06-12 22:25:16,316 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2793 ImplicationChecksByTransitivity, 3460.4ms TimeCoverageRelationStatistics Valid=959, Invalid=8547, Unknown=0, NotChecked=0, Total=9506 [2021-06-12 22:25:16,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11303 states. [2021-06-12 22:25:16,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11303 to 8676. [2021-06-12 22:25:16,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8676 states, 8675 states have (on average 2.31700288184438) internal successors, (20100), 8675 states have internal predecessors, (20100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:16,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8676 states to 8676 states and 20100 transitions. [2021-06-12 22:25:16,447 INFO L78 Accepts]: Start accepts. Automaton has 8676 states and 20100 transitions. Word has length 37 [2021-06-12 22:25:16,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:16,448 INFO L482 AbstractCegarLoop]: Abstraction has 8676 states and 20100 transitions. [2021-06-12 22:25:16,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:16,448 INFO L276 IsEmpty]: Start isEmpty. Operand 8676 states and 20100 transitions. [2021-06-12 22:25:16,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:25:16,454 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:16,455 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:16,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2477 [2021-06-12 22:25:16,655 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:16,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:16,656 INFO L82 PathProgramCache]: Analyzing trace with hash 766205447, now seen corresponding path program 150 times [2021-06-12 22:25:16,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:16,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955704975] [2021-06-12 22:25:16,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:16,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:16,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:16,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955704975] [2021-06-12 22:25:16,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955704975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:16,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809502868] [2021-06-12 22:25:16,922 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:16,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 22:25:16,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:16,950 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 54 conjunts are in the unsatisfiable core [2021-06-12 22:25:16,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:17,879 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:17,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809502868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:17,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:17,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-06-12 22:25:17,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997343882] [2021-06-12 22:25:17,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 22:25:17,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:17,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 22:25:17,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:25:17,880 INFO L87 Difference]: Start difference. First operand 8676 states and 20100 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:23,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:23,744 INFO L93 Difference]: Finished difference Result 12806 states and 29266 transitions. [2021-06-12 22:25:23,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-12 22:25:23,744 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:25:23,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:23,757 INFO L225 Difference]: With dead ends: 12806 [2021-06-12 22:25:23,757 INFO L226 Difference]: Without dead ends: 12763 [2021-06-12 22:25:23,758 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5274 ImplicationChecksByTransitivity, 5688.1ms TimeCoverageRelationStatistics Valid=1929, Invalid=13323, Unknown=0, NotChecked=0, Total=15252 [2021-06-12 22:25:23,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12763 states. [2021-06-12 22:25:23,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12763 to 8944. [2021-06-12 22:25:23,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8944 states, 8943 states have (on average 2.3187968243318795) internal successors, (20737), 8943 states have internal predecessors, (20737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:23,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8944 states to 8944 states and 20737 transitions. [2021-06-12 22:25:23,887 INFO L78 Accepts]: Start accepts. Automaton has 8944 states and 20737 transitions. Word has length 37 [2021-06-12 22:25:23,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:23,888 INFO L482 AbstractCegarLoop]: Abstraction has 8944 states and 20737 transitions. [2021-06-12 22:25:23,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:23,888 INFO L276 IsEmpty]: Start isEmpty. Operand 8944 states and 20737 transitions. [2021-06-12 22:25:23,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:25:23,895 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:23,895 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:24,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2499 [2021-06-12 22:25:24,096 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:24,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:24,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1506799643, now seen corresponding path program 151 times [2021-06-12 22:25:24,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:24,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761458327] [2021-06-12 22:25:24,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:24,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:24,389 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:24,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:24,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761458327] [2021-06-12 22:25:24,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761458327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:24,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427432904] [2021-06-12 22:25:24,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:24,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:24,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 22:25:24,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:25,097 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:25,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427432904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:25,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:25,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2021-06-12 22:25:25,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264526347] [2021-06-12 22:25:25,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 22:25:25,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:25,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 22:25:25,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:25:25,098 INFO L87 Difference]: Start difference. First operand 8944 states and 20737 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:30,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:30,477 INFO L93 Difference]: Finished difference Result 13828 states and 31463 transitions. [2021-06-12 22:25:30,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-12 22:25:30,478 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:25:30,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:30,492 INFO L225 Difference]: With dead ends: 13828 [2021-06-12 22:25:30,492 INFO L226 Difference]: Without dead ends: 13763 [2021-06-12 22:25:30,493 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5053 ImplicationChecksByTransitivity, 4687.9ms TimeCoverageRelationStatistics Valid=1672, Invalid=13828, Unknown=0, NotChecked=0, Total=15500 [2021-06-12 22:25:30,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13763 states. [2021-06-12 22:25:30,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13763 to 9228. [2021-06-12 22:25:30,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9228 states, 9227 states have (on average 2.318630107293812) internal successors, (21394), 9227 states have internal predecessors, (21394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:30,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9228 states to 9228 states and 21394 transitions. [2021-06-12 22:25:30,651 INFO L78 Accepts]: Start accepts. Automaton has 9228 states and 21394 transitions. Word has length 37 [2021-06-12 22:25:30,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:30,652 INFO L482 AbstractCegarLoop]: Abstraction has 9228 states and 21394 transitions. [2021-06-12 22:25:30,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:30,652 INFO L276 IsEmpty]: Start isEmpty. Operand 9228 states and 21394 transitions. [2021-06-12 22:25:30,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:25:30,658 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:30,658 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:30,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2517 [2021-06-12 22:25:30,859 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:30,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:30,859 INFO L82 PathProgramCache]: Analyzing trace with hash -2038707397, now seen corresponding path program 152 times [2021-06-12 22:25:30,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:30,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509069859] [2021-06-12 22:25:30,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:31,196 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:31,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:31,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509069859] [2021-06-12 22:25:31,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509069859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:31,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824259663] [2021-06-12 22:25:31,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:31,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:25:31,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:31,223 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 22:25:31,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:31,956 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:31,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824259663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:31,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:31,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-06-12 22:25:31,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006862628] [2021-06-12 22:25:31,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 22:25:31,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:31,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 22:25:31,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:25:31,957 INFO L87 Difference]: Start difference. First operand 9228 states and 21394 transitions. Second operand has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:35,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:35,055 INFO L93 Difference]: Finished difference Result 12038 states and 27683 transitions. [2021-06-12 22:25:35,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-12 22:25:35,055 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:25:35,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:35,066 INFO L225 Difference]: With dead ends: 12038 [2021-06-12 22:25:35,066 INFO L226 Difference]: Without dead ends: 11974 [2021-06-12 22:25:35,067 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2973 ImplicationChecksByTransitivity, 3117.7ms TimeCoverageRelationStatistics Valid=891, Invalid=8421, Unknown=0, NotChecked=0, Total=9312 [2021-06-12 22:25:35,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11974 states. [2021-06-12 22:25:35,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11974 to 9402. [2021-06-12 22:25:35,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9402 states, 9401 states have (on average 2.3177321561536006) internal successors, (21789), 9401 states have internal predecessors, (21789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:35,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9402 states to 9402 states and 21789 transitions. [2021-06-12 22:25:35,180 INFO L78 Accepts]: Start accepts. Automaton has 9402 states and 21789 transitions. Word has length 37 [2021-06-12 22:25:35,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:35,180 INFO L482 AbstractCegarLoop]: Abstraction has 9402 states and 21789 transitions. [2021-06-12 22:25:35,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:35,181 INFO L276 IsEmpty]: Start isEmpty. Operand 9402 states and 21789 transitions. [2021-06-12 22:25:35,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:25:35,188 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:35,188 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:35,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2538,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:35,388 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:35,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:35,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1185168001, now seen corresponding path program 153 times [2021-06-12 22:25:35,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:35,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108647027] [2021-06-12 22:25:35,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:35,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:35,706 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:35,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:35,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108647027] [2021-06-12 22:25:35,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108647027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:35,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122344770] [2021-06-12 22:25:35,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:35,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 22:25:35,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:35,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:25:35,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:36,107 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:36,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122344770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:36,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:36,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 32 [2021-06-12 22:25:36,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969489777] [2021-06-12 22:25:36,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 22:25:36,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:36,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 22:25:36,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:25:36,108 INFO L87 Difference]: Start difference. First operand 9402 states and 21789 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:39,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:39,018 INFO L93 Difference]: Finished difference Result 13606 states and 31169 transitions. [2021-06-12 22:25:39,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 22:25:39,018 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:25:39,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:39,033 INFO L225 Difference]: With dead ends: 13606 [2021-06-12 22:25:39,033 INFO L226 Difference]: Without dead ends: 13480 [2021-06-12 22:25:39,034 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1885 ImplicationChecksByTransitivity, 2647.5ms TimeCoverageRelationStatistics Valid=981, Invalid=5991, Unknown=0, NotChecked=0, Total=6972 [2021-06-12 22:25:39,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13480 states. [2021-06-12 22:25:39,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13480 to 9857. [2021-06-12 22:25:39,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9857 states, 9856 states have (on average 2.3118912337662336) internal successors, (22786), 9856 states have internal predecessors, (22786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:39,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9857 states to 9857 states and 22786 transitions. [2021-06-12 22:25:39,215 INFO L78 Accepts]: Start accepts. Automaton has 9857 states and 22786 transitions. Word has length 37 [2021-06-12 22:25:39,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:39,215 INFO L482 AbstractCegarLoop]: Abstraction has 9857 states and 22786 transitions. [2021-06-12 22:25:39,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:39,215 INFO L276 IsEmpty]: Start isEmpty. Operand 9857 states and 22786 transitions. [2021-06-12 22:25:39,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:25:39,222 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:39,222 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:39,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2555,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:39,422 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:39,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:39,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1157338053, now seen corresponding path program 154 times [2021-06-12 22:25:39,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:39,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532159779] [2021-06-12 22:25:39,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:39,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:39,772 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:39,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:39,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532159779] [2021-06-12 22:25:39,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532159779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:39,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234490387] [2021-06-12 22:25:39,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:39,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:25:39,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:39,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 22:25:39,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:40,487 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:40,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234490387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:40,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:40,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2021-06-12 22:25:40,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949873984] [2021-06-12 22:25:40,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 22:25:40,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:40,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 22:25:40,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:25:40,488 INFO L87 Difference]: Start difference. First operand 9857 states and 22786 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:46,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:46,185 INFO L93 Difference]: Finished difference Result 14288 states and 32546 transitions. [2021-06-12 22:25:46,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-06-12 22:25:46,185 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:25:46,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:46,199 INFO L225 Difference]: With dead ends: 14288 [2021-06-12 22:25:46,199 INFO L226 Difference]: Without dead ends: 14228 [2021-06-12 22:25:46,200 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4640 ImplicationChecksByTransitivity, 5037.0ms TimeCoverageRelationStatistics Valid=1717, Invalid=13289, Unknown=0, NotChecked=0, Total=15006 [2021-06-12 22:25:46,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14228 states. [2021-06-12 22:25:46,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14228 to 10307. [2021-06-12 22:25:46,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10307 states, 10306 states have (on average 2.3123423248593054) internal successors, (23831), 10306 states have internal predecessors, (23831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:46,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10307 states to 10307 states and 23831 transitions. [2021-06-12 22:25:46,349 INFO L78 Accepts]: Start accepts. Automaton has 10307 states and 23831 transitions. Word has length 37 [2021-06-12 22:25:46,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:46,349 INFO L482 AbstractCegarLoop]: Abstraction has 10307 states and 23831 transitions. [2021-06-12 22:25:46,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:46,349 INFO L276 IsEmpty]: Start isEmpty. Operand 10307 states and 23831 transitions. [2021-06-12 22:25:46,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 22:25:46,357 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:46,357 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:46,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2563 [2021-06-12 22:25:46,558 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:46,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:46,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1911324613, now seen corresponding path program 155 times [2021-06-12 22:25:46,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:46,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262915103] [2021-06-12 22:25:46,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:46,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:46,814 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:46,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:46,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262915103] [2021-06-12 22:25:46,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262915103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:46,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161836245] [2021-06-12 22:25:46,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:46,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 22:25:46,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:46,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:25:46,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:47,219 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:47,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161836245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:47,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:47,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 31 [2021-06-12 22:25:47,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009620855] [2021-06-12 22:25:47,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 22:25:47,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:47,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 22:25:47,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:25:47,220 INFO L87 Difference]: Start difference. First operand 10307 states and 23831 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:50,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:50,203 INFO L93 Difference]: Finished difference Result 14681 states and 33701 transitions. [2021-06-12 22:25:50,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 22:25:50,203 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 22:25:50,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:50,215 INFO L225 Difference]: With dead ends: 14681 [2021-06-12 22:25:50,215 INFO L226 Difference]: Without dead ends: 14530 [2021-06-12 22:25:50,216 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2161 ImplicationChecksByTransitivity, 2621.1ms TimeCoverageRelationStatistics Valid=1147, Invalid=6685, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 22:25:50,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14530 states. [2021-06-12 22:25:50,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14530 to 10928. [2021-06-12 22:25:50,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10928 states, 10927 states have (on average 2.315914706689851) internal successors, (25306), 10927 states have internal predecessors, (25306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:50,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10928 states to 10928 states and 25306 transitions. [2021-06-12 22:25:50,347 INFO L78 Accepts]: Start accepts. Automaton has 10928 states and 25306 transitions. Word has length 37 [2021-06-12 22:25:50,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:50,347 INFO L482 AbstractCegarLoop]: Abstraction has 10928 states and 25306 transitions. [2021-06-12 22:25:50,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:50,347 INFO L276 IsEmpty]: Start isEmpty. Operand 10928 states and 25306 transitions. [2021-06-12 22:25:50,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 22:25:50,357 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:50,357 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:50,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2584 [2021-06-12 22:25:50,557 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:50,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:50,557 INFO L82 PathProgramCache]: Analyzing trace with hash 855717531, now seen corresponding path program 156 times [2021-06-12 22:25:50,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:50,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574298132] [2021-06-12 22:25:50,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:50,778 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:50,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:50,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574298132] [2021-06-12 22:25:50,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574298132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:50,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365731111] [2021-06-12 22:25:50,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:50,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 22:25:50,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:50,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 22:25:50,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:51,423 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:51,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365731111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:51,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:51,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-12 22:25:51,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248065898] [2021-06-12 22:25:51,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 22:25:51,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:51,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 22:25:51,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:25:51,423 INFO L87 Difference]: Start difference. First operand 10928 states and 25306 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:53,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:53,484 INFO L93 Difference]: Finished difference Result 14325 states and 32936 transitions. [2021-06-12 22:25:53,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:25:53,485 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-12 22:25:53,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:53,498 INFO L225 Difference]: With dead ends: 14325 [2021-06-12 22:25:53,498 INFO L226 Difference]: Without dead ends: 14232 [2021-06-12 22:25:53,499 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1923 ImplicationChecksByTransitivity, 1935.4ms TimeCoverageRelationStatistics Valid=872, Invalid=5448, Unknown=0, NotChecked=0, Total=6320 [2021-06-12 22:25:53,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14232 states. [2021-06-12 22:25:53,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14232 to 11014. [2021-06-12 22:25:53,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11014 states, 11013 states have (on average 2.315990193407791) internal successors, (25506), 11013 states have internal predecessors, (25506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:53,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11014 states to 11014 states and 25506 transitions. [2021-06-12 22:25:53,633 INFO L78 Accepts]: Start accepts. Automaton has 11014 states and 25506 transitions. Word has length 39 [2021-06-12 22:25:53,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:53,633 INFO L482 AbstractCegarLoop]: Abstraction has 11014 states and 25506 transitions. [2021-06-12 22:25:53,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:53,633 INFO L276 IsEmpty]: Start isEmpty. Operand 11014 states and 25506 transitions. [2021-06-12 22:25:53,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 22:25:53,643 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:53,643 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:53,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2593,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:53,843 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:53,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:53,844 INFO L82 PathProgramCache]: Analyzing trace with hash 367286253, now seen corresponding path program 157 times [2021-06-12 22:25:53,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:53,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435268776] [2021-06-12 22:25:53,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:53,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:54,088 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:54,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:54,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435268776] [2021-06-12 22:25:54,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435268776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:54,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329772394] [2021-06-12 22:25:54,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:54,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:54,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 22:25:54,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:54,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329772394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:54,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:54,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-12 22:25:54,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141078374] [2021-06-12 22:25:54,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 22:25:54,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:54,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 22:25:54,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:25:54,765 INFO L87 Difference]: Start difference. First operand 11014 states and 25506 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:56,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:56,769 INFO L93 Difference]: Finished difference Result 14246 states and 32789 transitions. [2021-06-12 22:25:56,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 22:25:56,770 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-12 22:25:56,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:56,784 INFO L225 Difference]: With dead ends: 14246 [2021-06-12 22:25:56,784 INFO L226 Difference]: Without dead ends: 14165 [2021-06-12 22:25:56,784 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 1866.8ms TimeCoverageRelationStatistics Valid=732, Invalid=4818, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 22:25:56,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14165 states. [2021-06-12 22:25:56,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14165 to 11038. [2021-06-12 22:25:56,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11038 states, 11037 states have (on average 2.315484280148591) internal successors, (25556), 11037 states have internal predecessors, (25556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:56,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11038 states to 11038 states and 25556 transitions. [2021-06-12 22:25:56,921 INFO L78 Accepts]: Start accepts. Automaton has 11038 states and 25556 transitions. Word has length 39 [2021-06-12 22:25:56,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:56,921 INFO L482 AbstractCegarLoop]: Abstraction has 11038 states and 25556 transitions. [2021-06-12 22:25:56,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:56,921 INFO L276 IsEmpty]: Start isEmpty. Operand 11038 states and 25556 transitions. [2021-06-12 22:25:56,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 22:25:56,931 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:56,931 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:57,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2615,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:57,131 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:57,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:57,132 INFO L82 PathProgramCache]: Analyzing trace with hash 2065380333, now seen corresponding path program 158 times [2021-06-12 22:25:57,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:57,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113581325] [2021-06-12 22:25:57,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:57,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:57,360 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:57,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:57,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113581325] [2021-06-12 22:25:57,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113581325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:57,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027198628] [2021-06-12 22:25:57,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:25:57,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:25:57,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:57,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 22:25:57,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:58,022 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:58,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027198628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:58,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:58,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-12 22:25:58,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110901821] [2021-06-12 22:25:58,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 22:25:58,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:58,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 22:25:58,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:25:58,023 INFO L87 Difference]: Start difference. First operand 11038 states and 25556 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:00,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:00,848 INFO L93 Difference]: Finished difference Result 14589 states and 33530 transitions. [2021-06-12 22:26:00,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 22:26:00,848 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-12 22:26:00,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:00,884 INFO L225 Difference]: With dead ends: 14589 [2021-06-12 22:26:00,884 INFO L226 Difference]: Without dead ends: 14547 [2021-06-12 22:26:00,885 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2420 ImplicationChecksByTransitivity, 2622.7ms TimeCoverageRelationStatistics Valid=1213, Invalid=6797, Unknown=0, NotChecked=0, Total=8010 [2021-06-12 22:26:00,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14547 states. [2021-06-12 22:26:00,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14547 to 11114. [2021-06-12 22:26:00,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11114 states, 11113 states have (on average 2.315666336722757) internal successors, (25734), 11113 states have internal predecessors, (25734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:01,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11114 states to 11114 states and 25734 transitions. [2021-06-12 22:26:01,003 INFO L78 Accepts]: Start accepts. Automaton has 11114 states and 25734 transitions. Word has length 39 [2021-06-12 22:26:01,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:01,003 INFO L482 AbstractCegarLoop]: Abstraction has 11114 states and 25734 transitions. [2021-06-12 22:26:01,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:01,003 INFO L276 IsEmpty]: Start isEmpty. Operand 11114 states and 25734 transitions. [2021-06-12 22:26:01,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 22:26:01,012 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:01,012 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:01,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2637 [2021-06-12 22:26:01,219 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:01,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:01,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1136965671, now seen corresponding path program 159 times [2021-06-12 22:26:01,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:01,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624469054] [2021-06-12 22:26:01,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:01,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:01,469 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:01,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:01,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624469054] [2021-06-12 22:26:01,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624469054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:01,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063061536] [2021-06-12 22:26:01,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:01,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 22:26:01,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:01,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 22:26:01,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:02,178 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:02,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063061536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:02,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:02,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-12 22:26:02,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602155745] [2021-06-12 22:26:02,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 22:26:02,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:02,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 22:26:02,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:26:02,179 INFO L87 Difference]: Start difference. First operand 11114 states and 25734 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:04,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:04,684 INFO L93 Difference]: Finished difference Result 14390 states and 33112 transitions. [2021-06-12 22:26:04,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:26:04,685 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-12 22:26:04,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:04,698 INFO L225 Difference]: With dead ends: 14390 [2021-06-12 22:26:04,698 INFO L226 Difference]: Without dead ends: 14297 [2021-06-12 22:26:04,699 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 2314.6ms TimeCoverageRelationStatistics Valid=852, Invalid=5468, Unknown=0, NotChecked=0, Total=6320 [2021-06-12 22:26:04,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14297 states. [2021-06-12 22:26:04,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14297 to 11118. [2021-06-12 22:26:04,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11118 states, 11117 states have (on average 2.3155527570387693) internal successors, (25742), 11117 states have internal predecessors, (25742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:04,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11118 states to 11118 states and 25742 transitions. [2021-06-12 22:26:04,834 INFO L78 Accepts]: Start accepts. Automaton has 11118 states and 25742 transitions. Word has length 39 [2021-06-12 22:26:04,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:04,834 INFO L482 AbstractCegarLoop]: Abstraction has 11118 states and 25742 transitions. [2021-06-12 22:26:04,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:04,834 INFO L276 IsEmpty]: Start isEmpty. Operand 11118 states and 25742 transitions. [2021-06-12 22:26:04,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 22:26:04,844 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:04,844 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:05,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2660,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:05,044 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:05,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:05,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1459907545, now seen corresponding path program 160 times [2021-06-12 22:26:05,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:05,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425709321] [2021-06-12 22:26:05,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:05,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:05,275 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:05,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:05,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425709321] [2021-06-12 22:26:05,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425709321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:05,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129210966] [2021-06-12 22:26:05,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:05,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:26:05,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:05,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 22:26:05,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:05,993 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:05,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129210966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:05,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:05,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-12 22:26:05,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305494675] [2021-06-12 22:26:05,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 22:26:05,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:05,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 22:26:05,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:26:05,994 INFO L87 Difference]: Start difference. First operand 11118 states and 25742 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:09,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:09,177 INFO L93 Difference]: Finished difference Result 14835 states and 34081 transitions. [2021-06-12 22:26:09,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 22:26:09,177 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-12 22:26:09,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:09,190 INFO L225 Difference]: With dead ends: 14835 [2021-06-12 22:26:09,190 INFO L226 Difference]: Without dead ends: 14793 [2021-06-12 22:26:09,190 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2604 ImplicationChecksByTransitivity, 3001.0ms TimeCoverageRelationStatistics Valid=1393, Invalid=7349, Unknown=0, NotChecked=0, Total=8742 [2021-06-12 22:26:09,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14793 states. [2021-06-12 22:26:09,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14793 to 11122. [2021-06-12 22:26:09,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11122 states, 11121 states have (on average 2.315439259059437) internal successors, (25750), 11121 states have internal predecessors, (25750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:09,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11122 states to 11122 states and 25750 transitions. [2021-06-12 22:26:09,328 INFO L78 Accepts]: Start accepts. Automaton has 11122 states and 25750 transitions. Word has length 39 [2021-06-12 22:26:09,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:09,328 INFO L482 AbstractCegarLoop]: Abstraction has 11122 states and 25750 transitions. [2021-06-12 22:26:09,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:09,328 INFO L276 IsEmpty]: Start isEmpty. Operand 11122 states and 25750 transitions. [2021-06-12 22:26:09,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 22:26:09,337 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:09,337 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:09,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2684 [2021-06-12 22:26:09,538 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:09,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:09,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1198285931, now seen corresponding path program 161 times [2021-06-12 22:26:09,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:09,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285058453] [2021-06-12 22:26:09,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:09,764 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:09,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:09,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285058453] [2021-06-12 22:26:09,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285058453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:09,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475625987] [2021-06-12 22:26:09,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:09,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 22:26:09,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:09,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 22:26:09,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:10,528 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:10,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475625987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:10,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:10,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-12 22:26:10,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194441041] [2021-06-12 22:26:10,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 22:26:10,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:10,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 22:26:10,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1197, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:26:10,529 INFO L87 Difference]: Start difference. First operand 11122 states and 25750 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:13,028 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 32 [2021-06-12 22:26:14,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:14,814 INFO L93 Difference]: Finished difference Result 15432 states and 35365 transitions. [2021-06-12 22:26:14,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-12 22:26:14,815 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-12 22:26:14,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:14,829 INFO L225 Difference]: With dead ends: 15432 [2021-06-12 22:26:14,829 INFO L226 Difference]: Without dead ends: 15390 [2021-06-12 22:26:14,830 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4288 ImplicationChecksByTransitivity, 3941.2ms TimeCoverageRelationStatistics Valid=1894, Invalid=10762, Unknown=0, NotChecked=0, Total=12656 [2021-06-12 22:26:14,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15390 states. [2021-06-12 22:26:14,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15390 to 11226. [2021-06-12 22:26:14,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11226 states, 11225 states have (on average 2.31554565701559) internal successors, (25992), 11225 states have internal predecessors, (25992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:14,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11226 states to 11226 states and 25992 transitions. [2021-06-12 22:26:14,973 INFO L78 Accepts]: Start accepts. Automaton has 11226 states and 25992 transitions. Word has length 39 [2021-06-12 22:26:14,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:14,973 INFO L482 AbstractCegarLoop]: Abstraction has 11226 states and 25992 transitions. [2021-06-12 22:26:14,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:14,973 INFO L276 IsEmpty]: Start isEmpty. Operand 11226 states and 25992 transitions. [2021-06-12 22:26:14,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 22:26:14,982 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:14,982 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:15,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2705,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:15,185 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:15,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:15,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1315146321, now seen corresponding path program 162 times [2021-06-12 22:26:15,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:15,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810804649] [2021-06-12 22:26:15,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:15,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:15,406 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:15,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:15,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810804649] [2021-06-12 22:26:15,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810804649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:15,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260827660] [2021-06-12 22:26:15,407 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:15,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 22:26:15,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:15,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 22:26:15,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:16,159 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:16,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260827660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:16,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:16,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-12 22:26:16,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728673827] [2021-06-12 22:26:16,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 22:26:16,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:16,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 22:26:16,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1194, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:26:16,160 INFO L87 Difference]: Start difference. First operand 11226 states and 25992 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:20,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:20,818 INFO L93 Difference]: Finished difference Result 15857 states and 36251 transitions. [2021-06-12 22:26:20,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-12 22:26:20,819 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-12 22:26:20,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:20,834 INFO L225 Difference]: With dead ends: 15857 [2021-06-12 22:26:20,834 INFO L226 Difference]: Without dead ends: 15815 [2021-06-12 22:26:20,835 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5462 ImplicationChecksByTransitivity, 4186.4ms TimeCoverageRelationStatistics Valid=2226, Invalid=13274, Unknown=0, NotChecked=0, Total=15500 [2021-06-12 22:26:20,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15815 states. [2021-06-12 22:26:20,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15815 to 11354. [2021-06-12 22:26:20,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11354 states, 11353 states have (on average 2.3170968026072405) internal successors, (26306), 11353 states have internal predecessors, (26306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:20,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11354 states to 11354 states and 26306 transitions. [2021-06-12 22:26:20,986 INFO L78 Accepts]: Start accepts. Automaton has 11354 states and 26306 transitions. Word has length 39 [2021-06-12 22:26:20,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:20,986 INFO L482 AbstractCegarLoop]: Abstraction has 11354 states and 26306 transitions. [2021-06-12 22:26:20,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:20,986 INFO L276 IsEmpty]: Start isEmpty. Operand 11354 states and 26306 transitions. [2021-06-12 22:26:20,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 22:26:20,996 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:20,996 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:21,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2731 [2021-06-12 22:26:21,197 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:21,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:21,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1603794957, now seen corresponding path program 163 times [2021-06-12 22:26:21,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:21,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087664341] [2021-06-12 22:26:21,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:21,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:21,458 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:21,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:21,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087664341] [2021-06-12 22:26:21,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087664341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:21,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969713812] [2021-06-12 22:26:21,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:21,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:21,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 22:26:21,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:26:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:22,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969713812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:22,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:26:22,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-06-12 22:26:22,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407263004] [2021-06-12 22:26:22,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 22:26:22,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:26:22,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 22:26:22,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:26:22,210 INFO L87 Difference]: Start difference. First operand 11354 states and 26306 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:27,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:26:27,428 INFO L93 Difference]: Finished difference Result 16704 states and 38033 transitions. [2021-06-12 22:26:27,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-12 22:26:27,428 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-12 22:26:27,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:26:27,446 INFO L225 Difference]: With dead ends: 16704 [2021-06-12 22:26:27,446 INFO L226 Difference]: Without dead ends: 16655 [2021-06-12 22:26:27,447 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6247 ImplicationChecksByTransitivity, 4737.7ms TimeCoverageRelationStatistics Valid=2587, Invalid=15235, Unknown=0, NotChecked=0, Total=17822 [2021-06-12 22:26:27,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16655 states. [2021-06-12 22:26:27,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16655 to 11527. [2021-06-12 22:26:27,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11527 states, 11526 states have (on average 2.318931112267916) internal successors, (26728), 11526 states have internal predecessors, (26728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:27,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11527 states to 11527 states and 26728 transitions. [2021-06-12 22:26:27,605 INFO L78 Accepts]: Start accepts. Automaton has 11527 states and 26728 transitions. Word has length 39 [2021-06-12 22:26:27,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:26:27,606 INFO L482 AbstractCegarLoop]: Abstraction has 11527 states and 26728 transitions. [2021-06-12 22:26:27,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:26:27,606 INFO L276 IsEmpty]: Start isEmpty. Operand 11527 states and 26728 transitions. [2021-06-12 22:26:27,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 22:26:27,616 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:26:27,616 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:26:27,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2755 [2021-06-12 22:26:27,816 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:26:27,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:26:27,816 INFO L82 PathProgramCache]: Analyzing trace with hash -692364489, now seen corresponding path program 164 times [2021-06-12 22:26:27,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:26:27,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6928159] [2021-06-12 22:26:27,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:26:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:26:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:26:28,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:26:28,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6928159] [2021-06-12 22:26:28,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6928159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:26:28,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915590138] [2021-06-12 22:26:28,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:26:28,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:26:28,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:26:28,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 22:26:28,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-06-12 22:29:17,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2777 [2021-06-12 22:29:17,127 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-12 22:29:17,128 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 22:29:17,130 WARN L196 ceAbstractionStarter]: Timeout [2021-06-12 22:29:17,130 INFO L202 PluginConnector]: Adding new model nonblocking-counter-alt2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 10:29:17 BasicIcfg [2021-06-12 22:29:17,130 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 22:29:17,130 INFO L168 Benchmark]: Toolchain (without parser) took 799039.83 ms. Allocated memory was 165.7 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 145.7 MB in the beginning and 1.1 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. [2021-06-12 22:29:17,130 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 165.7 MB. Free memory is still 146.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 22:29:17,130 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.77 ms. Allocated memory is still 165.7 MB. Free memory was 145.6 MB in the beginning and 144.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 22:29:17,130 INFO L168 Benchmark]: Boogie Preprocessor took 12.99 ms. Allocated memory is still 165.7 MB. Free memory was 144.1 MB in the beginning and 143.2 MB in the end (delta: 941.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 22:29:17,130 INFO L168 Benchmark]: RCFGBuilder took 164.90 ms. Allocated memory is still 165.7 MB. Free memory was 143.1 MB in the beginning and 131.8 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-06-12 22:29:17,131 INFO L168 Benchmark]: TraceAbstraction took 798838.15 ms. Allocated memory was 165.7 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 131.4 MB in the beginning and 1.1 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. [2021-06-12 22:29:17,131 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 0.08 ms. Allocated memory is still 165.7 MB. Free memory is still 146.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 18.77 ms. Allocated memory is still 165.7 MB. Free memory was 145.6 MB in the beginning and 144.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.99 ms. Allocated memory is still 165.7 MB. Free memory was 144.1 MB in the beginning and 143.2 MB in the end (delta: 941.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 164.90 ms. Allocated memory is still 165.7 MB. Free memory was 143.1 MB in the beginning and 131.8 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 798838.15 ms. Allocated memory was 165.7 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 131.4 MB in the beginning and 1.1 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 40 with TraceHistMax 6,while TraceCheckSpWp was constructing forward predicates,while ExplicitLhsPolynomialRelations was build 0 of 1 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 798784.1ms, OverallIterations: 166, TraceHistogramMax: 6, EmptinessCheckTime: 571.2ms, AutomataDifference: 466355.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 26.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6393 SDtfs, 47769 SDslu, 100866 SDs, 0 SdLazy, 260600 SolverSat, 16320 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 96356.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17246 GetRequests, 3255 SyntacticMatches, 191 SemanticMatches, 13800 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454627 ImplicationChecksByTransitivity, 434275.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=11527occurred in iteration=165, InterpolantAutomatonStates: 10321, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 7548.2ms AutomataMinimizationTime, 165 MinimizatonAttempts, 212945 StatesRemovedByMinimization, 165 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 459.4ms SsaConstructionTime, 2120.2ms SatisfiabilityAnalysisTime, 115649.7ms InterpolantComputationTime, 11094 NumberOfCodeBlocks, 11094 NumberOfCodeBlocksAsserted, 771 NumberOfCheckSat, 10766 ConstructedInterpolants, 0 QuantifiedInterpolants, 179406 SizeOfPredicates, 718 NumberOfNonLiveVariables, 12442 ConjunctsInSsa, 5374 ConjunctsInUnsatCore, 328 InterpolantComputations, 2 PerfectInterpolantSequences, 505/15371 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown