/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-bad/threaded-sum-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 21:35:28,272 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 21:35:28,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 21:35:28,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 21:35:28,331 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-12 21:35:28,333 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-12 21:35:28,334 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-12 21:35:28,335 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-12 21:35:28,338 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-12 21:35:28,339 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-12 21:35:28,342 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-12 21:35:28,346 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-12 21:35:28,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-12 21:35:28,348 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-12 21:35:28,349 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-12 21:35:28,351 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-12 21:35:28,357 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-12 21:35:28,381 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 21:35:28,411 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 21:35:28,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 21:35:28,412 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 21:35:28,412 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 21:35:28,414 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 21:35:28,414 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 21:35:28,415 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 21:35:28,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 21:35:28,415 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 21:35:28,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 21:35:28,416 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 21:35:28,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 21:35:28,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 21:35:28,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 21:35:28,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 21:35:28,417 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 21:35:28,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 21:35:28,417 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 21:35:28,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 21:35:28,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 21:35:28,417 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 21:35:28,418 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 21:35:28,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 21:35:28,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 21:35:28,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 21:35:28,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 21:35:28,418 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 21:35:28,418 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 21:35:28,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 21:35:28,419 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 21:35:28,419 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 21:35:28,419 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 21:35:28,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 21:35:28,711 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 21:35:28,713 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 21:35:28,714 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 21:35:28,715 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 21:35:28,716 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/threaded-sum-2.wvr.bpl [2021-06-12 21:35:28,716 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/threaded-sum-2.wvr.bpl' [2021-06-12 21:35:28,745 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 21:35:28,747 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 21:35:28,748 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 21:35:28,748 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 21:35:28,748 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 21:35:28,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:35:28" (1/1) ... [2021-06-12 21:35:28,762 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:35:28" (1/1) ... [2021-06-12 21:35:28,767 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 21:35:28,768 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 21:35:28,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 21:35:28,769 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 21:35:28,774 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:35:28" (1/1) ... [2021-06-12 21:35:28,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:35:28" (1/1) ... [2021-06-12 21:35:28,775 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:35:28" (1/1) ... [2021-06-12 21:35:28,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:35:28" (1/1) ... [2021-06-12 21:35:28,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:35:28" (1/1) ... [2021-06-12 21:35:28,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:35:28" (1/1) ... [2021-06-12 21:35:28,780 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:35:28" (1/1) ... [2021-06-12 21:35:28,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 21:35:28,781 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 21:35:28,781 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 21:35:28,781 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 21:35:28,782 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:35:28" (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 21:35:28,834 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 21:35:28,834 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 21:35:28,834 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 21:35:28,835 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 21:35:28,835 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 21:35:28,835 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 21:35:28,835 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 21:35:28,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 21:35:28,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 21:35:28,836 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 21:35:28,999 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 21:35:28,999 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 21:35:29,001 INFO L202 PluginConnector]: Adding new model threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 09:35:29 BoogieIcfgContainer [2021-06-12 21:35:29,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 21:35:29,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 21:35:29,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 21:35:29,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 21:35:29,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:35:28" (1/2) ... [2021-06-12 21:35:29,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fd7e2b and model type threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 09:35:29, skipping insertion in model container [2021-06-12 21:35:29,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 09:35:29" (2/2) ... [2021-06-12 21:35:29,007 INFO L111 eAbstractionObserver]: Analyzing ICFG threaded-sum-2.wvr.bpl [2021-06-12 21:35:29,012 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 21:35:29,012 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 21:35:29,012 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 21:35:29,013 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 21:35:29,036 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-12 21:35:29,053 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 21:35:29,068 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 21:35:29,068 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 21:35:29,068 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 21:35:29,068 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 21:35:29,068 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 21:35:29,068 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 21:35:29,068 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 21:35:29,069 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 21:35:29,076 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 24 transitions, 64 flow [2021-06-12 21:35:29,085 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 40 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 39 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 21:35:29,087 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 39 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 21:35:29,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 21:35:29,091 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:29,092 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:29,092 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:29,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:29,096 INFO L82 PathProgramCache]: Analyzing trace with hash -281375544, now seen corresponding path program 1 times [2021-06-12 21:35:29,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:29,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782458637] [2021-06-12 21:35:29,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:29,243 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 21:35:29,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:29,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782458637] [2021-06-12 21:35:29,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782458637] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:35:29,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:35:29,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 21:35:29,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427449981] [2021-06-12 21:35:29,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 21:35:29,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:29,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 21:35:29,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:35:29,260 INFO L87 Difference]: Start difference. First operand has 40 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 39 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) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:29,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:29,292 INFO L93 Difference]: Finished difference Result 38 states and 65 transitions. [2021-06-12 21:35:29,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 21:35:29,293 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 21:35:29,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:29,300 INFO L225 Difference]: With dead ends: 38 [2021-06-12 21:35:29,300 INFO L226 Difference]: Without dead ends: 38 [2021-06-12 21:35:29,301 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:35:29,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-06-12 21:35:29,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-06-12 21:35:29,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 37 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 21:35:29,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 65 transitions. [2021-06-12 21:35:29,326 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 65 transitions. Word has length 15 [2021-06-12 21:35:29,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:29,326 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 65 transitions. [2021-06-12 21:35:29,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:29,327 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 65 transitions. [2021-06-12 21:35:29,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 21:35:29,328 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:29,328 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:29,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 21:35:29,328 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:29,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:29,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1344639720, now seen corresponding path program 1 times [2021-06-12 21:35:29,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:29,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669289949] [2021-06-12 21:35:29,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:29,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:29,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:29,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669289949] [2021-06-12 21:35:29,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669289949] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:35:29,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:35:29,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 21:35:29,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585270796] [2021-06-12 21:35:29,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 21:35:29,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:29,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 21:35:29,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 21:35:29,366 INFO L87 Difference]: Start difference. First operand 38 states and 65 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:29,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:29,391 INFO L93 Difference]: Finished difference Result 62 states and 113 transitions. [2021-06-12 21:35:29,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 21:35:29,392 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 21:35:29,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:29,394 INFO L225 Difference]: With dead ends: 62 [2021-06-12 21:35:29,394 INFO L226 Difference]: Without dead ends: 62 [2021-06-12 21:35:29,394 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 21:35:29,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-06-12 21:35:29,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-06-12 21:35:29,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.8644067796610169) internal successors, (110), 59 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:29,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 110 transitions. [2021-06-12 21:35:29,404 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 110 transitions. Word has length 18 [2021-06-12 21:35:29,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:29,404 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 110 transitions. [2021-06-12 21:35:29,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:29,405 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 110 transitions. [2021-06-12 21:35:29,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 21:35:29,405 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:29,406 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:29,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 21:35:29,406 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:29,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:29,406 INFO L82 PathProgramCache]: Analyzing trace with hash 405244970, now seen corresponding path program 1 times [2021-06-12 21:35:29,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:29,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917131608] [2021-06-12 21:35:29,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:35:29,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:29,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917131608] [2021-06-12 21:35:29,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917131608] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:35:29,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:35:29,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 21:35:29,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164596220] [2021-06-12 21:35:29,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 21:35:29,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:29,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 21:35:29,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 21:35:29,449 INFO L87 Difference]: Start difference. First operand 60 states and 110 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:29,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:29,466 INFO L93 Difference]: Finished difference Result 87 states and 157 transitions. [2021-06-12 21:35:29,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 21:35:29,467 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 21:35:29,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:29,468 INFO L225 Difference]: With dead ends: 87 [2021-06-12 21:35:29,468 INFO L226 Difference]: Without dead ends: 87 [2021-06-12 21:35:29,469 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 21:35:29,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-12 21:35:29,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 62. [2021-06-12 21:35:29,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.8852459016393444) internal successors, (115), 61 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:29,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 115 transitions. [2021-06-12 21:35:29,478 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 115 transitions. Word has length 20 [2021-06-12 21:35:29,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:29,478 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 115 transitions. [2021-06-12 21:35:29,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:29,478 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 115 transitions. [2021-06-12 21:35:29,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:35:29,479 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:29,479 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:29,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 21:35:29,480 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:29,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:29,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1785950996, now seen corresponding path program 2 times [2021-06-12 21:35:29,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:29,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54049837] [2021-06-12 21:35:29,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:29,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:29,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:35:29,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:29,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54049837] [2021-06-12 21:35:29,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54049837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:29,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661407665] [2021-06-12 21:35:29,717 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 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 21:35:29,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:35:29,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:29,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 21:35:29,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:30,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:30,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661407665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:30,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:30,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 21:35:30,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305690149] [2021-06-12 21:35:30,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:35:30,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:30,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:35:30,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:35:30,439 INFO L87 Difference]: Start difference. First operand 62 states and 115 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:30,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:30,853 INFO L93 Difference]: Finished difference Result 116 states and 207 transitions. [2021-06-12 21:35:30,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 21:35:30,854 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 21:35:30,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:30,855 INFO L225 Difference]: With dead ends: 116 [2021-06-12 21:35:30,855 INFO L226 Difference]: Without dead ends: 102 [2021-06-12 21:35:30,856 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 663.9ms TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:35:30,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-12 21:35:30,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 74. [2021-06-12 21:35:30,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.904109589041096) internal successors, (139), 73 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:30,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 139 transitions. [2021-06-12 21:35:30,864 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 139 transitions. Word has length 22 [2021-06-12 21:35:30,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:30,864 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 139 transitions. [2021-06-12 21:35:30,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:30,865 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 139 transitions. [2021-06-12 21:35:30,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:35:30,865 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:30,866 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:31,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:31,081 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:31,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:31,082 INFO L82 PathProgramCache]: Analyzing trace with hash 828519660, now seen corresponding path program 3 times [2021-06-12 21:35:31,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:31,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238439269] [2021-06-12 21:35:31,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:31,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:31,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:31,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:31,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238439269] [2021-06-12 21:35:31,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238439269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:31,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467923828] [2021-06-12 21:35:31,317 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:31,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 21:35:31,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:31,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 21:35:31,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:31,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:31,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467923828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:31,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:31,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 21:35:31,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947024988] [2021-06-12 21:35:31,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:35:31,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:31,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:35:31,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:35:31,820 INFO L87 Difference]: Start difference. First operand 74 states and 139 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:32,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:32,403 INFO L93 Difference]: Finished difference Result 163 states and 299 transitions. [2021-06-12 21:35:32,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 21:35:32,404 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 21:35:32,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:32,405 INFO L225 Difference]: With dead ends: 163 [2021-06-12 21:35:32,405 INFO L226 Difference]: Without dead ends: 149 [2021-06-12 21:35:32,406 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 708.8ms TimeCoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:35:32,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-12 21:35:32,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 76. [2021-06-12 21:35:32,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9333333333333333) internal successors, (145), 75 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:32,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 145 transitions. [2021-06-12 21:35:32,413 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 145 transitions. Word has length 22 [2021-06-12 21:35:32,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:32,414 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 145 transitions. [2021-06-12 21:35:32,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:32,414 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 145 transitions. [2021-06-12 21:35:32,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:35:32,415 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:32,415 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:32,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:32,640 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:32,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:32,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1769874196, now seen corresponding path program 4 times [2021-06-12 21:35:32,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:32,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528973473] [2021-06-12 21:35:32,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:32,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:32,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:32,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:32,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528973473] [2021-06-12 21:35:32,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528973473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:32,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177274373] [2021-06-12 21:35:32,866 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 21:35:32,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:35:32,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:32,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 21:35:32,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:33,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177274373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:33,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:33,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 21:35:33,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676993740] [2021-06-12 21:35:33,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:35:33,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:33,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:35:33,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:35:33,270 INFO L87 Difference]: Start difference. First operand 76 states and 145 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:34,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:34,127 INFO L93 Difference]: Finished difference Result 201 states and 383 transitions. [2021-06-12 21:35:34,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 21:35:34,128 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 21:35:34,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:34,129 INFO L225 Difference]: With dead ends: 201 [2021-06-12 21:35:34,129 INFO L226 Difference]: Without dead ends: 169 [2021-06-12 21:35:34,130 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 885.7ms TimeCoverageRelationStatistics Valid=312, Invalid=1410, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 21:35:34,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-12 21:35:34,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 76. [2021-06-12 21:35:34,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9333333333333333) internal successors, (145), 75 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:34,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 145 transitions. [2021-06-12 21:35:34,136 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 145 transitions. Word has length 22 [2021-06-12 21:35:34,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:34,136 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 145 transitions. [2021-06-12 21:35:34,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:34,137 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 145 transitions. [2021-06-12 21:35:34,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:35:34,137 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:34,137 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:34,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-12 21:35:34,360 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:34,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:34,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1242135592, now seen corresponding path program 5 times [2021-06-12 21:35:34,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:34,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802062710] [2021-06-12 21:35:34,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:34,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:34,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:34,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:34,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802062710] [2021-06-12 21:35:34,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802062710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:34,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265671863] [2021-06-12 21:35:34,589 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 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 21:35:34,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:35:34,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:34,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 21:35:34,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:35,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:35,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265671863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:35,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:35,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 21:35:35,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101503043] [2021-06-12 21:35:35,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:35:35,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:35,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:35:35,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:35:35,011 INFO L87 Difference]: Start difference. First operand 76 states and 145 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:35,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:35,519 INFO L93 Difference]: Finished difference Result 144 states and 270 transitions. [2021-06-12 21:35:35,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 21:35:35,519 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 21:35:35,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:35,520 INFO L225 Difference]: With dead ends: 144 [2021-06-12 21:35:35,520 INFO L226 Difference]: Without dead ends: 130 [2021-06-12 21:35:35,521 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 656.0ms TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 21:35:35,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-12 21:35:35,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 90. [2021-06-12 21:35:35,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.9887640449438202) internal successors, (177), 89 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:35,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 177 transitions. [2021-06-12 21:35:35,527 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 177 transitions. Word has length 22 [2021-06-12 21:35:35,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:35,527 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 177 transitions. [2021-06-12 21:35:35,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:35,527 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 177 transitions. [2021-06-12 21:35:35,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:35:35,528 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:35,528 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:35,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:35,741 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:35,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:35,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1356258264, now seen corresponding path program 6 times [2021-06-12 21:35:35,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:35,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196599199] [2021-06-12 21:35:35,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:35,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:35,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:35,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:35,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196599199] [2021-06-12 21:35:35,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196599199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:35,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717461596] [2021-06-12 21:35:35,909 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 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 21:35:35,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:35:35,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:35,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 21:35:35,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:36,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717461596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:36,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:36,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-06-12 21:35:36,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609707721] [2021-06-12 21:35:36,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:35:36,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:36,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:35:36,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:35:36,297 INFO L87 Difference]: Start difference. First operand 90 states and 177 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:37,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:37,061 INFO L93 Difference]: Finished difference Result 199 states and 389 transitions. [2021-06-12 21:35:37,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 21:35:37,061 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 21:35:37,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:37,062 INFO L225 Difference]: With dead ends: 199 [2021-06-12 21:35:37,062 INFO L226 Difference]: Without dead ends: 167 [2021-06-12 21:35:37,063 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 750.9ms TimeCoverageRelationStatistics Valid=252, Invalid=1154, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 21:35:37,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-12 21:35:37,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 88. [2021-06-12 21:35:37,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.9655172413793103) internal successors, (171), 87 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:37,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 171 transitions. [2021-06-12 21:35:37,068 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 171 transitions. Word has length 22 [2021-06-12 21:35:37,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:37,069 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 171 transitions. [2021-06-12 21:35:37,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:37,069 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 171 transitions. [2021-06-12 21:35:37,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:35:37,070 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:37,070 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:37,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-12 21:35:37,292 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:37,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:37,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1781598820, now seen corresponding path program 7 times [2021-06-12 21:35:37,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:37,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045222289] [2021-06-12 21:35:37,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:37,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:37,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:37,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:37,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045222289] [2021-06-12 21:35:37,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045222289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:37,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804198284] [2021-06-12 21:35:37,454 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 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 21:35:37,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:37,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 21:35:37,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:37,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:37,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804198284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:37,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:37,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 21:35:37,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739210056] [2021-06-12 21:35:37,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:35:37,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:37,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:35:37,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:35:37,821 INFO L87 Difference]: Start difference. First operand 88 states and 171 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:38,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:38,211 INFO L93 Difference]: Finished difference Result 172 states and 329 transitions. [2021-06-12 21:35:38,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 21:35:38,212 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 21:35:38,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:38,212 INFO L225 Difference]: With dead ends: 172 [2021-06-12 21:35:38,212 INFO L226 Difference]: Without dead ends: 130 [2021-06-12 21:35:38,213 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 518.9ms TimeCoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:35:38,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-12 21:35:38,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2021-06-12 21:35:38,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.9655172413793103) internal successors, (171), 87 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:38,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 171 transitions. [2021-06-12 21:35:38,217 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 171 transitions. Word has length 22 [2021-06-12 21:35:38,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:38,218 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 171 transitions. [2021-06-12 21:35:38,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:38,218 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 171 transitions. [2021-06-12 21:35:38,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:35:38,218 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:38,219 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:38,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-12 21:35:38,425 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:38,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:38,425 INFO L82 PathProgramCache]: Analyzing trace with hash 449508136, now seen corresponding path program 8 times [2021-06-12 21:35:38,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:38,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445725484] [2021-06-12 21:35:38,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:38,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:38,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:38,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:38,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445725484] [2021-06-12 21:35:38,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445725484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:38,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407221152] [2021-06-12 21:35:38,585 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 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 21:35:38,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:35:38,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:38,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 21:35:38,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:38,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:38,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407221152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:38,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:38,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 21:35:38,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187488301] [2021-06-12 21:35:38,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:35:38,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:38,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:35:38,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:35:38,906 INFO L87 Difference]: Start difference. First operand 88 states and 171 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:39,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:39,316 INFO L93 Difference]: Finished difference Result 214 states and 410 transitions. [2021-06-12 21:35:39,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 21:35:39,316 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 21:35:39,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:39,317 INFO L225 Difference]: With dead ends: 214 [2021-06-12 21:35:39,317 INFO L226 Difference]: Without dead ends: 172 [2021-06-12 21:35:39,318 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 499.9ms TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:35:39,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-12 21:35:39,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 94. [2021-06-12 21:35:39,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.967741935483871) internal successors, (183), 93 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:39,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 183 transitions. [2021-06-12 21:35:39,322 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 183 transitions. Word has length 22 [2021-06-12 21:35:39,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:39,322 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 183 transitions. [2021-06-12 21:35:39,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:39,322 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 183 transitions. [2021-06-12 21:35:39,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:35:39,323 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:39,323 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:39,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:39,537 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:39,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:39,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1295303378, now seen corresponding path program 9 times [2021-06-12 21:35:39,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:39,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259646386] [2021-06-12 21:35:39,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:39,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:39,697 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 21:35:39,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:39,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259646386] [2021-06-12 21:35:39,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259646386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:39,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098818200] [2021-06-12 21:35:39,697 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 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 21:35:39,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:35:39,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:39,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:35:39,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:40,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098818200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:40,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:40,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2021-06-12 21:35:40,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911524236] [2021-06-12 21:35:40,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:35:40,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:40,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:35:40,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:35:40,115 INFO L87 Difference]: Start difference. First operand 94 states and 183 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:40,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:40,442 INFO L93 Difference]: Finished difference Result 186 states and 344 transitions. [2021-06-12 21:35:40,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 21:35:40,443 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:35:40,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:40,444 INFO L225 Difference]: With dead ends: 186 [2021-06-12 21:35:40,444 INFO L226 Difference]: Without dead ends: 140 [2021-06-12 21:35:40,444 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 563.9ms TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:35:40,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-06-12 21:35:40,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 123. [2021-06-12 21:35:40,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.9754098360655739) internal successors, (241), 122 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:40,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 241 transitions. [2021-06-12 21:35:40,448 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 241 transitions. Word has length 24 [2021-06-12 21:35:40,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:40,449 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 241 transitions. [2021-06-12 21:35:40,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:40,449 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 241 transitions. [2021-06-12 21:35:40,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:35:40,450 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:40,450 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:40,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-12 21:35:40,665 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:40,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:40,665 INFO L82 PathProgramCache]: Analyzing trace with hash 886879146, now seen corresponding path program 10 times [2021-06-12 21:35:40,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:40,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986254405] [2021-06-12 21:35:40,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:40,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:40,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:35:40,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:40,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986254405] [2021-06-12 21:35:40,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986254405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:40,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992115775] [2021-06-12 21:35:40,826 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:40,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:35:40,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:40,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:35:40,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:41,343 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:41,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992115775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:41,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:41,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2021-06-12 21:35:41,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352285094] [2021-06-12 21:35:41,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:35:41,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:41,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:35:41,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:35:41,345 INFO L87 Difference]: Start difference. First operand 123 states and 241 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:41,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:41,884 INFO L93 Difference]: Finished difference Result 183 states and 339 transitions. [2021-06-12 21:35:41,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 21:35:41,884 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:35:41,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:41,886 INFO L225 Difference]: With dead ends: 183 [2021-06-12 21:35:41,886 INFO L226 Difference]: Without dead ends: 161 [2021-06-12 21:35:41,887 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 821.4ms TimeCoverageRelationStatistics Valid=212, Invalid=1048, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 21:35:41,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-12 21:35:41,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 124. [2021-06-12 21:35:41,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.975609756097561) internal successors, (243), 123 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:41,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 243 transitions. [2021-06-12 21:35:41,890 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 243 transitions. Word has length 24 [2021-06-12 21:35:41,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:41,891 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 243 transitions. [2021-06-12 21:35:41,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:41,891 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 243 transitions. [2021-06-12 21:35:41,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:35:41,891 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:41,891 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:42,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-12 21:35:42,109 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:42,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:42,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1328794322, now seen corresponding path program 11 times [2021-06-12 21:35:42,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:42,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714033815] [2021-06-12 21:35:42,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:42,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:42,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 21:35:42,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:42,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714033815] [2021-06-12 21:35:42,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714033815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:42,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364883489] [2021-06-12 21:35:42,246 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 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 21:35:42,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 21:35:42,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:42,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:35:42,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:42,808 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:42,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364883489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:42,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:42,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2021-06-12 21:35:42,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520389463] [2021-06-12 21:35:42,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:35:42,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:42,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:35:42,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:35:42,810 INFO L87 Difference]: Start difference. First operand 124 states and 243 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:43,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:43,644 INFO L93 Difference]: Finished difference Result 196 states and 367 transitions. [2021-06-12 21:35:43,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 21:35:43,644 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:35:43,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:43,645 INFO L225 Difference]: With dead ends: 196 [2021-06-12 21:35:43,645 INFO L226 Difference]: Without dead ends: 172 [2021-06-12 21:35:43,646 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 1039.8ms TimeCoverageRelationStatistics Valid=300, Invalid=1260, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 21:35:43,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-12 21:35:43,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 124. [2021-06-12 21:35:43,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.975609756097561) internal successors, (243), 123 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:43,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 243 transitions. [2021-06-12 21:35:43,649 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 243 transitions. Word has length 24 [2021-06-12 21:35:43,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:43,650 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 243 transitions. [2021-06-12 21:35:43,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:43,650 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 243 transitions. [2021-06-12 21:35:43,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:35:43,650 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:43,651 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:43,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:43,867 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:43,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:43,867 INFO L82 PathProgramCache]: Analyzing trace with hash -727951854, now seen corresponding path program 12 times [2021-06-12 21:35:43,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:43,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427454091] [2021-06-12 21:35:43,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:44,050 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:44,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:44,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427454091] [2021-06-12 21:35:44,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427454091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:44,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052774545] [2021-06-12 21:35:44,051 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 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 21:35:44,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:35:44,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:44,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 21:35:44,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:44,439 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:44,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052774545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:44,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:44,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 21:35:44,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617867508] [2021-06-12 21:35:44,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:35:44,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:44,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:35:44,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:35:44,441 INFO L87 Difference]: Start difference. First operand 124 states and 243 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:44,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:44,842 INFO L93 Difference]: Finished difference Result 168 states and 318 transitions. [2021-06-12 21:35:44,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:35:44,843 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:35:44,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:44,843 INFO L225 Difference]: With dead ends: 168 [2021-06-12 21:35:44,843 INFO L226 Difference]: Without dead ends: 143 [2021-06-12 21:35:44,844 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 582.1ms TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:35:44,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-12 21:35:44,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 126. [2021-06-12 21:35:44,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.976) internal successors, (247), 125 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:44,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 247 transitions. [2021-06-12 21:35:44,847 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 247 transitions. Word has length 24 [2021-06-12 21:35:44,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:44,847 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 247 transitions. [2021-06-12 21:35:44,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:44,848 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 247 transitions. [2021-06-12 21:35:44,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:35:44,848 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:44,848 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:45,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-12 21:35:45,061 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:45,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:45,061 INFO L82 PathProgramCache]: Analyzing trace with hash -966844970, now seen corresponding path program 13 times [2021-06-12 21:35:45,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:45,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549219205] [2021-06-12 21:35:45,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:45,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:45,214 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:45,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:45,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549219205] [2021-06-12 21:35:45,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549219205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:45,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551759574] [2021-06-12 21:35:45,215 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 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 21:35:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:45,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 21:35:45,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:45,567 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:45,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551759574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:45,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:45,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 21:35:45,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692206004] [2021-06-12 21:35:45,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:35:45,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:45,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:35:45,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:35:45,569 INFO L87 Difference]: Start difference. First operand 126 states and 247 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:45,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:45,990 INFO L93 Difference]: Finished difference Result 163 states and 308 transitions. [2021-06-12 21:35:45,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 21:35:45,990 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 21:35:45,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:45,991 INFO L225 Difference]: With dead ends: 163 [2021-06-12 21:35:45,991 INFO L226 Difference]: Without dead ends: 138 [2021-06-12 21:35:45,991 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 560.1ms TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:35:45,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-12 21:35:45,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2021-06-12 21:35:45,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.9734513274336283) internal successors, (223), 113 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:45,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 223 transitions. [2021-06-12 21:35:45,994 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 223 transitions. Word has length 24 [2021-06-12 21:35:45,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:45,995 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 223 transitions. [2021-06-12 21:35:45,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:45,995 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 223 transitions. [2021-06-12 21:35:45,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:35:45,995 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:45,995 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:46,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:46,201 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:46,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:46,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1813322510, now seen corresponding path program 14 times [2021-06-12 21:35:46,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:46,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054807032] [2021-06-12 21:35:46,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:46,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:46,430 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:46,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:46,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054807032] [2021-06-12 21:35:46,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054807032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:46,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479001837] [2021-06-12 21:35:46,430 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 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 21:35:46,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:35:46,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:46,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:35:46,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:46,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479001837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:46,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:46,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-06-12 21:35:46,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120136310] [2021-06-12 21:35:46,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 21:35:46,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:46,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 21:35:46,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:35:46,984 INFO L87 Difference]: Start difference. First operand 114 states and 223 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:47,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:47,556 INFO L93 Difference]: Finished difference Result 277 states and 529 transitions. [2021-06-12 21:35:47,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 21:35:47,556 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:35:47,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:47,557 INFO L225 Difference]: With dead ends: 277 [2021-06-12 21:35:47,557 INFO L226 Difference]: Without dead ends: 263 [2021-06-12 21:35:47,557 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 910.7ms TimeCoverageRelationStatistics Valid=382, Invalid=1874, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 21:35:47,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-06-12 21:35:47,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 154. [2021-06-12 21:35:47,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.0588235294117645) internal successors, (315), 153 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:47,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 315 transitions. [2021-06-12 21:35:47,562 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 315 transitions. Word has length 27 [2021-06-12 21:35:47,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:47,562 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 315 transitions. [2021-06-12 21:35:47,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:47,562 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 315 transitions. [2021-06-12 21:35:47,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:35:47,563 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:47,563 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:47,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-12 21:35:47,773 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:47,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:47,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1763754766, now seen corresponding path program 15 times [2021-06-12 21:35:47,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:47,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072075910] [2021-06-12 21:35:47,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:47,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:47,948 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:47,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:47,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072075910] [2021-06-12 21:35:47,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072075910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:47,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714363592] [2021-06-12 21:35:47,948 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 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 21:35:47,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:35:47,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:47,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:35:47,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:48,436 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:48,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714363592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:48,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:48,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-12 21:35:48,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146448844] [2021-06-12 21:35:48,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:35:48,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:48,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:35:48,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:35:48,437 INFO L87 Difference]: Start difference. First operand 154 states and 315 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:49,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:49,818 INFO L93 Difference]: Finished difference Result 345 states and 670 transitions. [2021-06-12 21:35:49,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 21:35:49,818 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:35:49,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:49,820 INFO L225 Difference]: With dead ends: 345 [2021-06-12 21:35:49,820 INFO L226 Difference]: Without dead ends: 331 [2021-06-12 21:35:49,821 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 1454.9ms TimeCoverageRelationStatistics Valid=750, Invalid=4220, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 21:35:49,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-06-12 21:35:49,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 158. [2021-06-12 21:35:49,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.082802547770701) internal successors, (327), 157 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:49,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 327 transitions. [2021-06-12 21:35:49,827 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 327 transitions. Word has length 27 [2021-06-12 21:35:49,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:49,828 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 327 transitions. [2021-06-12 21:35:49,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:49,828 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 327 transitions. [2021-06-12 21:35:49,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:35:49,829 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:49,829 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:50,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:50,037 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:50,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:50,037 INFO L82 PathProgramCache]: Analyzing trace with hash 83258126, now seen corresponding path program 16 times [2021-06-12 21:35:50,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:50,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889864090] [2021-06-12 21:35:50,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:50,233 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:50,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:50,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889864090] [2021-06-12 21:35:50,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889864090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:50,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539220569] [2021-06-12 21:35:50,234 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 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 21:35:50,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:35:50,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:50,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:35:50,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:50,751 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:50,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539220569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:50,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:50,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-12 21:35:50,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65668055] [2021-06-12 21:35:50,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:35:50,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:50,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:35:50,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:35:50,752 INFO L87 Difference]: Start difference. First operand 158 states and 327 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:52,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:52,697 INFO L93 Difference]: Finished difference Result 351 states and 699 transitions. [2021-06-12 21:35:52,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 21:35:52,698 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:35:52,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:52,699 INFO L225 Difference]: With dead ends: 351 [2021-06-12 21:35:52,699 INFO L226 Difference]: Without dead ends: 337 [2021-06-12 21:35:52,700 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2043 ImplicationChecksByTransitivity, 1887.4ms TimeCoverageRelationStatistics Valid=910, Invalid=5252, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 21:35:52,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-06-12 21:35:52,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 158. [2021-06-12 21:35:52,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.082802547770701) internal successors, (327), 157 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:52,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 327 transitions. [2021-06-12 21:35:52,704 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 327 transitions. Word has length 27 [2021-06-12 21:35:52,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:52,704 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 327 transitions. [2021-06-12 21:35:52,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:52,705 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 327 transitions. [2021-06-12 21:35:52,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:35:52,705 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:52,705 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:52,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-12 21:35:52,928 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:52,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:52,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1779831566, now seen corresponding path program 17 times [2021-06-12 21:35:52,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:52,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594792183] [2021-06-12 21:35:52,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:52,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:53,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:53,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594792183] [2021-06-12 21:35:53,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594792183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:53,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082163850] [2021-06-12 21:35:53,124 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 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 21:35:53,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 21:35:53,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:53,145 WARN L261 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:35:53,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:53,726 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:53,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082163850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:53,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:53,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 30 [2021-06-12 21:35:53,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047771196] [2021-06-12 21:35:53,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:35:53,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:53,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:35:53,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:35:53,727 INFO L87 Difference]: Start difference. First operand 158 states and 327 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:56,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:56,723 INFO L93 Difference]: Finished difference Result 411 states and 807 transitions. [2021-06-12 21:35:56,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-12 21:35:56,724 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:35:56,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:56,725 INFO L225 Difference]: With dead ends: 411 [2021-06-12 21:35:56,725 INFO L226 Difference]: Without dead ends: 366 [2021-06-12 21:35:56,727 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3099 ImplicationChecksByTransitivity, 2921.3ms TimeCoverageRelationStatistics Valid=1079, Invalid=8041, Unknown=0, NotChecked=0, Total=9120 [2021-06-12 21:35:56,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-12 21:35:56,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 176. [2021-06-12 21:35:56,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.1085714285714285) internal successors, (369), 175 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:56,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 369 transitions. [2021-06-12 21:35:56,732 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 369 transitions. Word has length 27 [2021-06-12 21:35:56,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:56,732 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 369 transitions. [2021-06-12 21:35:56,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:56,732 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 369 transitions. [2021-06-12 21:35:56,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:35:56,733 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:56,733 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:56,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:56,955 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:56,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:56,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1450173818, now seen corresponding path program 18 times [2021-06-12 21:35:56,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:56,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51544421] [2021-06-12 21:35:56,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:56,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:57,135 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:57,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:57,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51544421] [2021-06-12 21:35:57,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51544421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:57,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298295748] [2021-06-12 21:35:57,135 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 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 21:35:57,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:35:57,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:57,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:35:57,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:57,675 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:57,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298295748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:57,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:57,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-12 21:35:57,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246755268] [2021-06-12 21:35:57,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:35:57,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:57,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:35:57,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:35:57,677 INFO L87 Difference]: Start difference. First operand 176 states and 369 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:58,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:58,543 INFO L93 Difference]: Finished difference Result 331 states and 647 transitions. [2021-06-12 21:35:58,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 21:35:58,549 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:35:58,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:58,550 INFO L225 Difference]: With dead ends: 331 [2021-06-12 21:35:58,550 INFO L226 Difference]: Without dead ends: 317 [2021-06-12 21:35:58,551 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 1074.9ms TimeCoverageRelationStatistics Valid=495, Invalid=2811, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 21:35:58,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-12 21:35:58,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 196. [2021-06-12 21:35:58,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.1384615384615384) internal successors, (417), 195 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:58,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 417 transitions. [2021-06-12 21:35:58,555 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 417 transitions. Word has length 27 [2021-06-12 21:35:58,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:58,555 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 417 transitions. [2021-06-12 21:35:58,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:35:58,556 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 417 transitions. [2021-06-12 21:35:58,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:35:58,556 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:58,556 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:58,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:58,765 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:58,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:58,765 INFO L82 PathProgramCache]: Analyzing trace with hash 246399622, now seen corresponding path program 19 times [2021-06-12 21:35:58,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:58,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347327070] [2021-06-12 21:35:58,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:59,010 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:59,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:59,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347327070] [2021-06-12 21:35:59,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347327070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:59,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366256038] [2021-06-12 21:35:59,010 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 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 21:35:59,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:59,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:35:59,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:59,470 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:59,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366256038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:59,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:59,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-12 21:35:59,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016508414] [2021-06-12 21:35:59,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 21:35:59,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:59,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 21:35:59,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:35:59,471 INFO L87 Difference]: Start difference. First operand 196 states and 417 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:00,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:00,835 INFO L93 Difference]: Finished difference Result 389 states and 772 transitions. [2021-06-12 21:36:00,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 21:36:00,836 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:36:00,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:00,837 INFO L225 Difference]: With dead ends: 389 [2021-06-12 21:36:00,837 INFO L226 Difference]: Without dead ends: 357 [2021-06-12 21:36:00,838 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 1396.5ms TimeCoverageRelationStatistics Valid=715, Invalid=4115, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 21:36:00,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-12 21:36:00,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 196. [2021-06-12 21:36:00,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.1384615384615384) internal successors, (417), 195 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:00,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 417 transitions. [2021-06-12 21:36:00,844 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 417 transitions. Word has length 27 [2021-06-12 21:36:00,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:00,844 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 417 transitions. [2021-06-12 21:36:00,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:00,844 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 417 transitions. [2021-06-12 21:36:00,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:36:00,845 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:00,845 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:01,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-12 21:36:01,068 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:01,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:01,069 INFO L82 PathProgramCache]: Analyzing trace with hash -910710590, now seen corresponding path program 20 times [2021-06-12 21:36:01,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:01,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017498034] [2021-06-12 21:36:01,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:01,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:01,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:01,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017498034] [2021-06-12 21:36:01,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017498034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:01,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83435914] [2021-06-12 21:36:01,268 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:01,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:36:01,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:01,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:36:01,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:01,699 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:01,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83435914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:01,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:01,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-12 21:36:01,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838730817] [2021-06-12 21:36:01,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:36:01,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:01,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:36:01,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:36:01,700 INFO L87 Difference]: Start difference. First operand 196 states and 417 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:02,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:02,715 INFO L93 Difference]: Finished difference Result 364 states and 719 transitions. [2021-06-12 21:36:02,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 21:36:02,716 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:36:02,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:02,717 INFO L225 Difference]: With dead ends: 364 [2021-06-12 21:36:02,717 INFO L226 Difference]: Without dead ends: 322 [2021-06-12 21:36:02,718 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1162.1ms TimeCoverageRelationStatistics Valid=520, Invalid=3020, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 21:36:02,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-12 21:36:02,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 198. [2021-06-12 21:36:02,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.1370558375634516) internal successors, (421), 197 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:02,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 421 transitions. [2021-06-12 21:36:02,723 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 421 transitions. Word has length 27 [2021-06-12 21:36:02,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:02,723 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 421 transitions. [2021-06-12 21:36:02,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:02,723 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 421 transitions. [2021-06-12 21:36:02,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:36:02,724 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:02,724 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:02,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:02,937 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:02,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:02,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1689066934, now seen corresponding path program 21 times [2021-06-12 21:36:02,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:02,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508542699] [2021-06-12 21:36:02,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:03,114 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:03,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:03,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508542699] [2021-06-12 21:36:03,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508542699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:03,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759412006] [2021-06-12 21:36:03,114 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 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 21:36:03,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:36:03,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:03,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:36:03,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:03,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759412006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:03,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:03,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-12 21:36:03,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460545390] [2021-06-12 21:36:03,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:36:03,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:03,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:36:03,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:36:03,638 INFO L87 Difference]: Start difference. First operand 198 states and 421 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:04,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:04,668 INFO L93 Difference]: Finished difference Result 410 states and 841 transitions. [2021-06-12 21:36:04,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 21:36:04,669 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:36:04,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:04,670 INFO L225 Difference]: With dead ends: 410 [2021-06-12 21:36:04,670 INFO L226 Difference]: Without dead ends: 396 [2021-06-12 21:36:04,670 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 1143.2ms TimeCoverageRelationStatistics Valid=545, Invalid=2877, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 21:36:04,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-06-12 21:36:04,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 258. [2021-06-12 21:36:04,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.2140077821011674) internal successors, (569), 257 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:04,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 569 transitions. [2021-06-12 21:36:04,676 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 569 transitions. Word has length 27 [2021-06-12 21:36:04,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:04,676 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 569 transitions. [2021-06-12 21:36:04,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:04,676 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 569 transitions. [2021-06-12 21:36:04,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:36:04,677 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:04,677 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:04,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-12 21:36:04,893 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:04,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:04,893 INFO L82 PathProgramCache]: Analyzing trace with hash 7506506, now seen corresponding path program 22 times [2021-06-12 21:36:04,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:04,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934051764] [2021-06-12 21:36:04,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:04,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:05,092 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:05,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:05,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934051764] [2021-06-12 21:36:05,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934051764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:05,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957544134] [2021-06-12 21:36:05,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:36:05,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:36:05,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:05,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:36:05,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:05,529 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:05,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957544134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:05,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:05,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-12 21:36:05,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302137972] [2021-06-12 21:36:05,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 21:36:05,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:05,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 21:36:05,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:36:05,530 INFO L87 Difference]: Start difference. First operand 258 states and 569 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:07,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:07,108 INFO L93 Difference]: Finished difference Result 464 states and 961 transitions. [2021-06-12 21:36:07,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 21:36:07,109 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:36:07,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:07,110 INFO L225 Difference]: With dead ends: 464 [2021-06-12 21:36:07,110 INFO L226 Difference]: Without dead ends: 432 [2021-06-12 21:36:07,110 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 1518.3ms TimeCoverageRelationStatistics Valid=803, Invalid=4747, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 21:36:07,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-06-12 21:36:07,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 230. [2021-06-12 21:36:07,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1790393013100435) internal successors, (499), 229 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:07,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 499 transitions. [2021-06-12 21:36:07,116 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 499 transitions. Word has length 27 [2021-06-12 21:36:07,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:07,116 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 499 transitions. [2021-06-12 21:36:07,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:07,116 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 499 transitions. [2021-06-12 21:36:07,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:36:07,117 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:07,117 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:07,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:07,333 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:07,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:07,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1149603706, now seen corresponding path program 23 times [2021-06-12 21:36:07,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:07,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325733756] [2021-06-12 21:36:07,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:07,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:07,522 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:07,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:07,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325733756] [2021-06-12 21:36:07,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325733756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:07,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839486212] [2021-06-12 21:36:07,522 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 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 21:36:07,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:36:07,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:07,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:36:07,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:07,963 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:07,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839486212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:07,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:07,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-12 21:36:07,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731349100] [2021-06-12 21:36:07,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:36:07,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:07,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:36:07,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:36:07,964 INFO L87 Difference]: Start difference. First operand 230 states and 499 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:09,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:09,126 INFO L93 Difference]: Finished difference Result 416 states and 851 transitions. [2021-06-12 21:36:09,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 21:36:09,126 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:36:09,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:09,127 INFO L225 Difference]: With dead ends: 416 [2021-06-12 21:36:09,127 INFO L226 Difference]: Without dead ends: 374 [2021-06-12 21:36:09,127 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 1200.4ms TimeCoverageRelationStatistics Valid=585, Invalid=3197, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 21:36:09,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-06-12 21:36:09,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 190. [2021-06-12 21:36:09,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.121693121693122) internal successors, (401), 189 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:09,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 401 transitions. [2021-06-12 21:36:09,131 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 401 transitions. Word has length 27 [2021-06-12 21:36:09,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:09,131 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 401 transitions. [2021-06-12 21:36:09,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:09,132 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 401 transitions. [2021-06-12 21:36:09,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:36:09,132 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:09,132 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:09,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:09,351 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:09,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:09,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1813272906, now seen corresponding path program 24 times [2021-06-12 21:36:09,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:09,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188888261] [2021-06-12 21:36:09,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:09,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:09,540 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:09,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:09,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188888261] [2021-06-12 21:36:09,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188888261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:09,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478039889] [2021-06-12 21:36:09,540 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 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 21:36:09,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:36:09,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:09,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:36:09,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:09,964 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:09,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478039889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:09,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:09,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-12 21:36:09,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383283781] [2021-06-12 21:36:09,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:36:09,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:09,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:36:09,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:36:09,965 INFO L87 Difference]: Start difference. First operand 190 states and 401 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:11,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:11,155 INFO L93 Difference]: Finished difference Result 478 states and 964 transitions. [2021-06-12 21:36:11,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 21:36:11,156 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:36:11,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:11,157 INFO L225 Difference]: With dead ends: 478 [2021-06-12 21:36:11,157 INFO L226 Difference]: Without dead ends: 436 [2021-06-12 21:36:11,157 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 1230.2ms TimeCoverageRelationStatistics Valid=628, Invalid=3404, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 21:36:11,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-12 21:36:11,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 184. [2021-06-12 21:36:11,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.1147540983606556) internal successors, (387), 183 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:11,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 387 transitions. [2021-06-12 21:36:11,162 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 387 transitions. Word has length 27 [2021-06-12 21:36:11,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:11,162 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 387 transitions. [2021-06-12 21:36:11,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:11,162 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 387 transitions. [2021-06-12 21:36:11,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:36:11,162 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:11,162 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:11,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-12 21:36:11,373 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:11,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:11,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1183589754, now seen corresponding path program 25 times [2021-06-12 21:36:11,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:11,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162186858] [2021-06-12 21:36:11,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:11,554 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:11,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:11,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162186858] [2021-06-12 21:36:11,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162186858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:11,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677140954] [2021-06-12 21:36:11,554 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 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 21:36:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:11,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:36:11,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:11,995 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:11,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677140954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:11,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:11,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-12 21:36:11,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208756360] [2021-06-12 21:36:11,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:36:11,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:11,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:36:11,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:36:11,997 INFO L87 Difference]: Start difference. First operand 184 states and 387 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:12,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:12,867 INFO L93 Difference]: Finished difference Result 535 states and 1056 transitions. [2021-06-12 21:36:12,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 21:36:12,867 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:36:12,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:12,869 INFO L225 Difference]: With dead ends: 535 [2021-06-12 21:36:12,869 INFO L226 Difference]: Without dead ends: 521 [2021-06-12 21:36:12,869 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 1025.2ms TimeCoverageRelationStatistics Valid=477, Invalid=2829, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 21:36:12,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-12 21:36:12,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 265. [2021-06-12 21:36:12,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.2083333333333335) internal successors, (583), 264 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:12,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 583 transitions. [2021-06-12 21:36:12,875 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 583 transitions. Word has length 27 [2021-06-12 21:36:12,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:12,875 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 583 transitions. [2021-06-12 21:36:12,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:12,875 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 583 transitions. [2021-06-12 21:36:12,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:36:12,876 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:12,876 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:13,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:13,089 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:13,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:13,089 INFO L82 PathProgramCache]: Analyzing trace with hash 512983686, now seen corresponding path program 26 times [2021-06-12 21:36:13,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:13,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819437538] [2021-06-12 21:36:13,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:13,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:13,269 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:13,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:13,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819437538] [2021-06-12 21:36:13,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819437538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:13,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887931853] [2021-06-12 21:36:13,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:36:13,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:36:13,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:13,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:36:13,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:13,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887931853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:13,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:13,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-12 21:36:13,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954271862] [2021-06-12 21:36:13,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:36:13,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:13,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:36:13,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:36:13,777 INFO L87 Difference]: Start difference. First operand 265 states and 583 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:15,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:15,339 INFO L93 Difference]: Finished difference Result 600 states and 1200 transitions. [2021-06-12 21:36:15,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 21:36:15,340 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:36:15,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:15,341 INFO L225 Difference]: With dead ends: 600 [2021-06-12 21:36:15,341 INFO L226 Difference]: Without dead ends: 580 [2021-06-12 21:36:15,341 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1717 ImplicationChecksByTransitivity, 1585.4ms TimeCoverageRelationStatistics Valid=785, Invalid=4765, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 21:36:15,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-06-12 21:36:15,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 265. [2021-06-12 21:36:15,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.2083333333333335) internal successors, (583), 264 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:15,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 583 transitions. [2021-06-12 21:36:15,347 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 583 transitions. Word has length 27 [2021-06-12 21:36:15,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:15,347 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 583 transitions. [2021-06-12 21:36:15,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:15,347 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 583 transitions. [2021-06-12 21:36:15,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:36:15,348 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:15,348 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:15,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-12 21:36:15,569 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:15,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:15,569 INFO L82 PathProgramCache]: Analyzing trace with hash -644126526, now seen corresponding path program 27 times [2021-06-12 21:36:15,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:15,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545088598] [2021-06-12 21:36:15,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:15,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:15,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545088598] [2021-06-12 21:36:15,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545088598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:15,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045646931] [2021-06-12 21:36:15,718 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 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 21:36:15,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:36:15,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:15,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:36:15,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:16,138 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:16,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045646931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:16,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:16,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-12 21:36:16,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728131092] [2021-06-12 21:36:16,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:36:16,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:16,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:36:16,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:36:16,139 INFO L87 Difference]: Start difference. First operand 265 states and 583 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:17,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:17,589 INFO L93 Difference]: Finished difference Result 651 states and 1311 transitions. [2021-06-12 21:36:17,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 21:36:17,589 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:36:17,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:17,591 INFO L225 Difference]: With dead ends: 651 [2021-06-12 21:36:17,591 INFO L226 Difference]: Without dead ends: 615 [2021-06-12 21:36:17,591 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 1412.4ms TimeCoverageRelationStatistics Valid=769, Invalid=4487, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 21:36:17,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-06-12 21:36:17,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 263. [2021-06-12 21:36:17,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.187022900763359) internal successors, (573), 262 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:17,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 573 transitions. [2021-06-12 21:36:17,596 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 573 transitions. Word has length 27 [2021-06-12 21:36:17,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:17,596 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 573 transitions. [2021-06-12 21:36:17,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:17,596 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 573 transitions. [2021-06-12 21:36:17,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:36:17,597 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:17,597 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:17,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:17,817 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:17,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:17,818 INFO L82 PathProgramCache]: Analyzing trace with hash -516363890, now seen corresponding path program 28 times [2021-06-12 21:36:17,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:17,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3614055] [2021-06-12 21:36:17,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:17,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:36:17,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:17,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3614055] [2021-06-12 21:36:17,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3614055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:17,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167247756] [2021-06-12 21:36:17,992 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 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 21:36:18,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:36:18,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:18,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:36:18,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:18,401 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:18,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167247756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:18,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:18,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-12 21:36:18,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745460709] [2021-06-12 21:36:18,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:36:18,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:18,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:36:18,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:36:18,402 INFO L87 Difference]: Start difference. First operand 263 states and 573 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:18,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:18,870 INFO L93 Difference]: Finished difference Result 387 states and 795 transitions. [2021-06-12 21:36:18,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 21:36:18,871 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:36:18,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:18,872 INFO L225 Difference]: With dead ends: 387 [2021-06-12 21:36:18,872 INFO L226 Difference]: Without dead ends: 373 [2021-06-12 21:36:18,872 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 696.5ms TimeCoverageRelationStatistics Valid=277, Invalid=1445, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 21:36:18,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-06-12 21:36:18,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 275. [2021-06-12 21:36:18,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:18,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-06-12 21:36:18,876 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 27 [2021-06-12 21:36:18,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:18,876 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-06-12 21:36:18,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:18,876 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-06-12 21:36:18,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:36:18,877 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:18,877 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:19,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-06-12 21:36:19,093 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:19,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:19,093 INFO L82 PathProgramCache]: Analyzing trace with hash 2098106766, now seen corresponding path program 29 times [2021-06-12 21:36:19,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:19,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906535763] [2021-06-12 21:36:19,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:19,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:36:19,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:19,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906535763] [2021-06-12 21:36:19,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906535763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:19,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576609372] [2021-06-12 21:36:19,272 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:19,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:36:19,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:19,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:36:19,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:19,701 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:19,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576609372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:19,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:19,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-06-12 21:36:19,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056787170] [2021-06-12 21:36:19,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 21:36:19,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:19,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 21:36:19,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:36:19,702 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:20,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:20,486 INFO L93 Difference]: Finished difference Result 462 states and 951 transitions. [2021-06-12 21:36:20,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 21:36:20,487 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:36:20,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:20,488 INFO L225 Difference]: With dead ends: 462 [2021-06-12 21:36:20,488 INFO L226 Difference]: Without dead ends: 448 [2021-06-12 21:36:20,488 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 960.1ms TimeCoverageRelationStatistics Valid=429, Invalid=2541, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 21:36:20,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-06-12 21:36:20,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 277. [2021-06-12 21:36:20,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.199275362318841) internal successors, (607), 276 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:20,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 607 transitions. [2021-06-12 21:36:20,493 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 607 transitions. Word has length 27 [2021-06-12 21:36:20,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:20,493 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 607 transitions. [2021-06-12 21:36:20,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:20,493 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 607 transitions. [2021-06-12 21:36:20,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:36:20,494 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:20,494 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:20,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-12 21:36:20,716 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:20,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:20,717 INFO L82 PathProgramCache]: Analyzing trace with hash -500287090, now seen corresponding path program 30 times [2021-06-12 21:36:20,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:20,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854622397] [2021-06-12 21:36:20,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:20,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:20,873 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:36:20,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:20,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854622397] [2021-06-12 21:36:20,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854622397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:20,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414350401] [2021-06-12 21:36:20,873 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 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 21:36:20,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:36:20,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:20,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:36:20,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:21,326 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:21,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414350401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:21,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:21,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-12 21:36:21,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633254261] [2021-06-12 21:36:21,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:36:21,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:21,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:36:21,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:36:21,328 INFO L87 Difference]: Start difference. First operand 277 states and 607 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:22,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:22,587 INFO L93 Difference]: Finished difference Result 541 states and 1110 transitions. [2021-06-12 21:36:22,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 21:36:22,587 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:36:22,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:22,589 INFO L225 Difference]: With dead ends: 541 [2021-06-12 21:36:22,589 INFO L226 Difference]: Without dead ends: 509 [2021-06-12 21:36:22,589 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 1259.9ms TimeCoverageRelationStatistics Valid=547, Invalid=3485, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 21:36:22,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-12 21:36:22,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 275. [2021-06-12 21:36:22,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:22,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-06-12 21:36:22,595 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 27 [2021-06-12 21:36:22,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:22,595 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-06-12 21:36:22,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:22,595 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-06-12 21:36:22,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:36:22,596 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:22,596 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:22,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:22,801 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:22,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:22,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1243781370, now seen corresponding path program 31 times [2021-06-12 21:36:22,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:22,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626325565] [2021-06-12 21:36:22,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:22,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:22,956 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:36:22,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:22,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626325565] [2021-06-12 21:36:22,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626325565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:22,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709919960] [2021-06-12 21:36:22,957 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 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 21:36:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:22,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:36:22,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:23,327 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:23,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709919960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:23,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:23,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-12 21:36:23,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357466541] [2021-06-12 21:36:23,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:36:23,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:23,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:36:23,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:36:23,328 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:24,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:24,181 INFO L93 Difference]: Finished difference Result 489 states and 1029 transitions. [2021-06-12 21:36:24,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 21:36:24,181 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:36:24,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:24,182 INFO L225 Difference]: With dead ends: 489 [2021-06-12 21:36:24,182 INFO L226 Difference]: Without dead ends: 447 [2021-06-12 21:36:24,183 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 919.5ms TimeCoverageRelationStatistics Valid=409, Invalid=2347, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 21:36:24,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-12 21:36:24,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 275. [2021-06-12 21:36:24,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:24,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-06-12 21:36:24,187 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 27 [2021-06-12 21:36:24,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:24,187 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-06-12 21:36:24,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:24,187 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-06-12 21:36:24,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:36:24,188 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:24,188 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:24,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:24,401 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:24,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:24,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1179632014, now seen corresponding path program 32 times [2021-06-12 21:36:24,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:24,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691568925] [2021-06-12 21:36:24,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:24,562 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:36:24,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:24,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691568925] [2021-06-12 21:36:24,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691568925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:24,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134469486] [2021-06-12 21:36:24,562 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 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 21:36:24,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:36:24,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:24,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:36:24,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:24,985 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:24,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134469486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:24,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:24,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-12 21:36:24,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279714019] [2021-06-12 21:36:24,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:36:24,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:24,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:36:24,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:36:24,987 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:25,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:25,690 INFO L93 Difference]: Finished difference Result 464 states and 973 transitions. [2021-06-12 21:36:25,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 21:36:25,690 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:36:25,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:25,692 INFO L225 Difference]: With dead ends: 464 [2021-06-12 21:36:25,692 INFO L226 Difference]: Without dead ends: 450 [2021-06-12 21:36:25,692 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 871.5ms TimeCoverageRelationStatistics Valid=346, Invalid=2006, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 21:36:25,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-12 21:36:25,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 295. [2021-06-12 21:36:25,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.2006802721088436) internal successors, (647), 294 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:25,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 647 transitions. [2021-06-12 21:36:25,697 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 647 transitions. Word has length 27 [2021-06-12 21:36:25,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:25,697 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 647 transitions. [2021-06-12 21:36:25,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:25,697 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 647 transitions. [2021-06-12 21:36:25,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:36:25,698 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:25,698 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:25,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-12 21:36:25,920 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:25,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:25,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1418761842, now seen corresponding path program 33 times [2021-06-12 21:36:25,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:25,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069991633] [2021-06-12 21:36:25,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:25,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:26,077 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:36:26,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:26,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069991633] [2021-06-12 21:36:26,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069991633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:26,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361623967] [2021-06-12 21:36:26,078 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 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 21:36:26,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:36:26,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:26,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:36:26,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:26,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361623967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:26,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:26,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-12 21:36:26,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623956255] [2021-06-12 21:36:26,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:36:26,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:26,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:36:26,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:36:26,444 INFO L87 Difference]: Start difference. First operand 295 states and 647 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:27,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:27,684 INFO L93 Difference]: Finished difference Result 569 states and 1201 transitions. [2021-06-12 21:36:27,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 21:36:27,685 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:36:27,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:27,686 INFO L225 Difference]: With dead ends: 569 [2021-06-12 21:36:27,686 INFO L226 Difference]: Without dead ends: 537 [2021-06-12 21:36:27,686 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 1206.1ms TimeCoverageRelationStatistics Valid=549, Invalid=3483, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 21:36:27,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-06-12 21:36:27,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 295. [2021-06-12 21:36:27,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.2006802721088436) internal successors, (647), 294 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:27,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 647 transitions. [2021-06-12 21:36:27,692 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 647 transitions. Word has length 27 [2021-06-12 21:36:27,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:27,692 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 647 transitions. [2021-06-12 21:36:27,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:27,692 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 647 transitions. [2021-06-12 21:36:27,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:36:27,693 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:27,693 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:27,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable185 [2021-06-12 21:36:27,915 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:27,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:27,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1719095242, now seen corresponding path program 34 times [2021-06-12 21:36:27,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:27,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924256492] [2021-06-12 21:36:27,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:27,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:36:28,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:28,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924256492] [2021-06-12 21:36:28,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924256492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:28,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944294737] [2021-06-12 21:36:28,090 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 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 21:36:28,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:36:28,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:28,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:36:28,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:28,488 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:28,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944294737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:28,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:28,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-12 21:36:28,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557139626] [2021-06-12 21:36:28,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:36:28,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:28,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:36:28,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:36:28,489 INFO L87 Difference]: Start difference. First operand 295 states and 647 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:29,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:29,489 INFO L93 Difference]: Finished difference Result 627 states and 1345 transitions. [2021-06-12 21:36:29,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 21:36:29,489 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:36:29,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:29,491 INFO L225 Difference]: With dead ends: 627 [2021-06-12 21:36:29,491 INFO L226 Difference]: Without dead ends: 585 [2021-06-12 21:36:29,491 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 1037.4ms TimeCoverageRelationStatistics Valid=441, Invalid=2529, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 21:36:29,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-12 21:36:29,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 289. [2021-06-12 21:36:29,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.1979166666666665) internal successors, (633), 288 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:29,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 633 transitions. [2021-06-12 21:36:29,497 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 633 transitions. Word has length 27 [2021-06-12 21:36:29,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:29,497 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 633 transitions. [2021-06-12 21:36:29,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:29,497 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 633 transitions. [2021-06-12 21:36:29,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:36:29,498 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:29,498 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:29,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:29,721 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:29,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:29,721 INFO L82 PathProgramCache]: Analyzing trace with hash 2141436106, now seen corresponding path program 35 times [2021-06-12 21:36:29,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:29,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917858425] [2021-06-12 21:36:29,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:29,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:29,881 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:29,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:29,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917858425] [2021-06-12 21:36:29,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917858425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:29,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327089886] [2021-06-12 21:36:29,881 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:29,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 21:36:29,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:29,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:36:29,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:30,234 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:30,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327089886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:30,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:30,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-12 21:36:30,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265626188] [2021-06-12 21:36:30,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:36:30,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:30,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:36:30,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:36:30,235 INFO L87 Difference]: Start difference. First operand 289 states and 633 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:30,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:30,889 INFO L93 Difference]: Finished difference Result 564 states and 1163 transitions. [2021-06-12 21:36:30,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 21:36:30,889 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:36:30,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:30,890 INFO L225 Difference]: With dead ends: 564 [2021-06-12 21:36:30,890 INFO L226 Difference]: Without dead ends: 550 [2021-06-12 21:36:30,891 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 785.2ms TimeCoverageRelationStatistics Valid=351, Invalid=2001, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 21:36:30,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-12 21:36:30,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 362. [2021-06-12 21:36:30,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.224376731301939) internal successors, (803), 361 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:30,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 803 transitions. [2021-06-12 21:36:30,895 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 803 transitions. Word has length 27 [2021-06-12 21:36:30,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:30,896 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 803 transitions. [2021-06-12 21:36:30,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:30,896 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 803 transitions. [2021-06-12 21:36:30,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:36:30,897 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:30,897 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:31,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-12 21:36:31,119 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:31,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:31,119 INFO L82 PathProgramCache]: Analyzing trace with hash -456957750, now seen corresponding path program 36 times [2021-06-12 21:36:31,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:31,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007294562] [2021-06-12 21:36:31,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:31,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:31,295 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:31,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:31,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007294562] [2021-06-12 21:36:31,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007294562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:31,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143479677] [2021-06-12 21:36:31,295 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 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 21:36:31,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:36:31,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:31,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:36:31,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:31,706 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:31,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143479677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:31,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:31,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-12 21:36:31,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058641609] [2021-06-12 21:36:31,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:36:31,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:31,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:36:31,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:36:31,708 INFO L87 Difference]: Start difference. First operand 362 states and 803 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:33,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:33,227 INFO L93 Difference]: Finished difference Result 680 states and 1421 transitions. [2021-06-12 21:36:33,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 21:36:33,228 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:36:33,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:33,229 INFO L225 Difference]: With dead ends: 680 [2021-06-12 21:36:33,229 INFO L226 Difference]: Without dead ends: 660 [2021-06-12 21:36:33,230 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 1447.0ms TimeCoverageRelationStatistics Valid=687, Invalid=4283, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 21:36:33,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-06-12 21:36:33,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 376. [2021-06-12 21:36:33,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.2293333333333334) internal successors, (836), 375 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:33,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 836 transitions. [2021-06-12 21:36:33,237 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 836 transitions. Word has length 27 [2021-06-12 21:36:33,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:33,237 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 836 transitions. [2021-06-12 21:36:33,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:33,237 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 836 transitions. [2021-06-12 21:36:33,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:36:33,238 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:33,238 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:33,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-12 21:36:33,453 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:33,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:33,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1614067962, now seen corresponding path program 37 times [2021-06-12 21:36:33,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:33,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993504675] [2021-06-12 21:36:33,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:33,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:33,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:33,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993504675] [2021-06-12 21:36:33,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993504675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:33,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503829370] [2021-06-12 21:36:33,601 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 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 21:36:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:33,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:36:33,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:33,956 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:33,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503829370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:33,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:33,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-12 21:36:33,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711483936] [2021-06-12 21:36:33,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:36:33,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:33,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:36:33,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:36:33,957 INFO L87 Difference]: Start difference. First operand 376 states and 836 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:35,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:35,242 INFO L93 Difference]: Finished difference Result 716 states and 1504 transitions. [2021-06-12 21:36:35,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 21:36:35,243 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:36:35,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:35,244 INFO L225 Difference]: With dead ends: 716 [2021-06-12 21:36:35,244 INFO L226 Difference]: Without dead ends: 680 [2021-06-12 21:36:35,245 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1196.6ms TimeCoverageRelationStatistics Valid=591, Invalid=3441, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 21:36:35,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-06-12 21:36:35,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 376. [2021-06-12 21:36:35,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.2293333333333334) internal successors, (836), 375 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:35,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 836 transitions. [2021-06-12 21:36:35,250 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 836 transitions. Word has length 27 [2021-06-12 21:36:35,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:35,250 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 836 transitions. [2021-06-12 21:36:35,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:35,250 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 836 transitions. [2021-06-12 21:36:35,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:36:35,250 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:35,251 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:35,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-06-12 21:36:35,451 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:35,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:35,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1912494094, now seen corresponding path program 38 times [2021-06-12 21:36:35,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:35,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852328439] [2021-06-12 21:36:35,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:35,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:35,618 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:35,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:35,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852328439] [2021-06-12 21:36:35,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852328439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:35,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243651181] [2021-06-12 21:36:35,618 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:35,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:36:35,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:35,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:36:35,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:36,004 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:36,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243651181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:36,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:36,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-06-12 21:36:36,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103437558] [2021-06-12 21:36:36,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 21:36:36,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:36,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 21:36:36,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:36:36,005 INFO L87 Difference]: Start difference. First operand 376 states and 836 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:36,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:36,673 INFO L93 Difference]: Finished difference Result 658 states and 1384 transitions. [2021-06-12 21:36:36,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 21:36:36,673 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:36:36,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:36,675 INFO L225 Difference]: With dead ends: 658 [2021-06-12 21:36:36,675 INFO L226 Difference]: Without dead ends: 644 [2021-06-12 21:36:36,675 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 765.3ms TimeCoverageRelationStatistics Valid=338, Invalid=1918, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 21:36:36,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-06-12 21:36:36,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 458. [2021-06-12 21:36:36,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 2.2450765864332602) internal successors, (1026), 457 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:36,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1026 transitions. [2021-06-12 21:36:36,682 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1026 transitions. Word has length 27 [2021-06-12 21:36:36,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:36,682 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1026 transitions. [2021-06-12 21:36:36,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:36,682 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1026 transitions. [2021-06-12 21:36:36,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:36:36,683 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:36,683 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:36,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-12 21:36:36,901 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:36,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:36,901 INFO L82 PathProgramCache]: Analyzing trace with hash -685899762, now seen corresponding path program 39 times [2021-06-12 21:36:36,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:36,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646280454] [2021-06-12 21:36:36,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:37,086 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:37,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:37,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646280454] [2021-06-12 21:36:37,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646280454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:37,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006673975] [2021-06-12 21:36:37,087 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 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 21:36:37,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:36:37,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:37,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 21:36:37,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:37,483 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:37,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006673975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:37,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:37,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-12 21:36:37,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376027622] [2021-06-12 21:36:37,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:36:37,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:37,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:36:37,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:36:37,485 INFO L87 Difference]: Start difference. First operand 458 states and 1026 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:38,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:38,746 INFO L93 Difference]: Finished difference Result 751 states and 1599 transitions. [2021-06-12 21:36:38,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 21:36:38,746 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 21:36:38,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:38,748 INFO L225 Difference]: With dead ends: 751 [2021-06-12 21:36:38,748 INFO L226 Difference]: Without dead ends: 731 [2021-06-12 21:36:38,748 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 1229.8ms TimeCoverageRelationStatistics Valid=578, Invalid=3454, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 21:36:38,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-06-12 21:36:38,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 401. [2021-06-12 21:36:38,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.23) internal successors, (892), 400 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:38,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 892 transitions. [2021-06-12 21:36:38,754 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 892 transitions. Word has length 27 [2021-06-12 21:36:38,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:38,754 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 892 transitions. [2021-06-12 21:36:38,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:38,754 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 892 transitions. [2021-06-12 21:36:38,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:36:38,755 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:38,755 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:38,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-12 21:36:38,969 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:38,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:38,969 INFO L82 PathProgramCache]: Analyzing trace with hash -620373174, now seen corresponding path program 40 times [2021-06-12 21:36:38,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:38,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671082383] [2021-06-12 21:36:38,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:38,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:39,119 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:39,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:39,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671082383] [2021-06-12 21:36:39,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671082383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:39,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925755030] [2021-06-12 21:36:39,119 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 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 21:36:39,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:36:39,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:39,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:36:39,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:39,510 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:39,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925755030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:39,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:39,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-12 21:36:39,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055142842] [2021-06-12 21:36:39,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:36:39,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:39,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:36:39,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:36:39,511 INFO L87 Difference]: Start difference. First operand 401 states and 892 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:40,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:40,070 INFO L93 Difference]: Finished difference Result 681 states and 1412 transitions. [2021-06-12 21:36:40,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 21:36:40,070 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 21:36:40,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:40,072 INFO L225 Difference]: With dead ends: 681 [2021-06-12 21:36:40,072 INFO L226 Difference]: Without dead ends: 667 [2021-06-12 21:36:40,072 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 685.2ms TimeCoverageRelationStatistics Valid=255, Invalid=1467, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 21:36:40,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-06-12 21:36:40,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 473. [2021-06-12 21:36:40,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.266949152542373) internal successors, (1070), 472 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:40,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1070 transitions. [2021-06-12 21:36:40,078 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1070 transitions. Word has length 27 [2021-06-12 21:36:40,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:40,078 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1070 transitions. [2021-06-12 21:36:40,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:40,078 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1070 transitions. [2021-06-12 21:36:40,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:36:40,079 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:40,079 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:40,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:40,287 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:40,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:40,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1994097482, now seen corresponding path program 41 times [2021-06-12 21:36:40,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:40,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370444511] [2021-06-12 21:36:40,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:40,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:40,443 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:40,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:40,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370444511] [2021-06-12 21:36:40,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370444511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:40,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203482555] [2021-06-12 21:36:40,443 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 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 21:36:40,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 21:36:40,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:40,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:36:40,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:40,831 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:40,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203482555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:40,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:40,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-06-12 21:36:40,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039086161] [2021-06-12 21:36:40,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 21:36:40,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:40,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 21:36:40,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:36:40,832 INFO L87 Difference]: Start difference. First operand 473 states and 1070 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:41,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:41,926 INFO L93 Difference]: Finished difference Result 783 states and 1648 transitions. [2021-06-12 21:36:41,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 21:36:41,928 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 21:36:41,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:41,930 INFO L225 Difference]: With dead ends: 783 [2021-06-12 21:36:41,930 INFO L226 Difference]: Without dead ends: 769 [2021-06-12 21:36:41,930 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 1150.1ms TimeCoverageRelationStatistics Valid=501, Invalid=3281, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 21:36:41,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-06-12 21:36:41,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 474. [2021-06-12 21:36:41,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 2.2769556025369977) internal successors, (1077), 473 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:41,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1077 transitions. [2021-06-12 21:36:41,938 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1077 transitions. Word has length 27 [2021-06-12 21:36:41,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:41,938 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1077 transitions. [2021-06-12 21:36:41,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:41,938 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1077 transitions. [2021-06-12 21:36:41,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:36:41,939 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:41,939 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:42,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-12 21:36:42,161 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:42,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:42,161 INFO L82 PathProgramCache]: Analyzing trace with hash -604296374, now seen corresponding path program 42 times [2021-06-12 21:36:42,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:42,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776011704] [2021-06-12 21:36:42,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:42,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:42,315 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:42,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:42,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776011704] [2021-06-12 21:36:42,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776011704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:42,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464225019] [2021-06-12 21:36:42,316 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 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 21:36:42,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 21:36:42,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:42,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:36:42,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:42,671 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:42,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464225019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:42,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:42,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-12 21:36:42,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446241498] [2021-06-12 21:36:42,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:36:42,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:42,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:36:42,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:36:42,672 INFO L87 Difference]: Start difference. First operand 474 states and 1077 transitions. Second operand has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:44,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:44,329 INFO L93 Difference]: Finished difference Result 813 states and 1728 transitions. [2021-06-12 21:36:44,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 21:36:44,330 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 21:36:44,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:44,332 INFO L225 Difference]: With dead ends: 813 [2021-06-12 21:36:44,332 INFO L226 Difference]: Without dead ends: 777 [2021-06-12 21:36:44,332 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 1462.7ms TimeCoverageRelationStatistics Valid=700, Invalid=4556, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 21:36:44,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-06-12 21:36:44,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 467. [2021-06-12 21:36:44,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 2.2618025751072963) internal successors, (1054), 466 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:44,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1054 transitions. [2021-06-12 21:36:44,339 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1054 transitions. Word has length 27 [2021-06-12 21:36:44,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:44,339 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1054 transitions. [2021-06-12 21:36:44,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:44,339 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1054 transitions. [2021-06-12 21:36:44,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:36:44,340 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:44,340 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:44,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:44,544 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:44,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:44,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1347790654, now seen corresponding path program 43 times [2021-06-12 21:36:44,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:44,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492816969] [2021-06-12 21:36:44,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:44,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:44,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:44,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492816969] [2021-06-12 21:36:44,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492816969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:44,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412406821] [2021-06-12 21:36:44,743 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 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 21:36:44,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:44,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:36:44,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:45,137 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:45,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412406821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:45,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:45,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-12 21:36:45,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905039001] [2021-06-12 21:36:45,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:36:45,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:45,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:36:45,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:36:45,138 INFO L87 Difference]: Start difference. First operand 467 states and 1054 transitions. Second operand has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:45,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:45,876 INFO L93 Difference]: Finished difference Result 765 states and 1611 transitions. [2021-06-12 21:36:45,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 21:36:45,876 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 21:36:45,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:45,878 INFO L225 Difference]: With dead ends: 765 [2021-06-12 21:36:45,878 INFO L226 Difference]: Without dead ends: 739 [2021-06-12 21:36:45,878 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 861.7ms TimeCoverageRelationStatistics Valid=410, Invalid=1660, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 21:36:45,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-06-12 21:36:45,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 506. [2021-06-12 21:36:45,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.257425742574257) internal successors, (1140), 505 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:45,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1140 transitions. [2021-06-12 21:36:45,885 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1140 transitions. Word has length 27 [2021-06-12 21:36:45,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:45,886 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1140 transitions. [2021-06-12 21:36:45,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:45,886 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1140 transitions. [2021-06-12 21:36:45,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:36:45,887 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:45,887 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:46,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-12 21:36:46,101 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:46,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:46,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1615085958, now seen corresponding path program 44 times [2021-06-12 21:36:46,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:46,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219456770] [2021-06-12 21:36:46,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:46,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:46,304 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:46,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:46,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219456770] [2021-06-12 21:36:46,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219456770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:46,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381198108] [2021-06-12 21:36:46,304 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 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 21:36:46,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:36:46,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:46,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:36:46,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:46,692 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:46,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381198108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:46,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:46,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-12 21:36:46,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841413622] [2021-06-12 21:36:46,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:36:46,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:46,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:36:46,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:36:46,693 INFO L87 Difference]: Start difference. First operand 506 states and 1140 transitions. Second operand has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:47,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:47,630 INFO L93 Difference]: Finished difference Result 878 states and 1897 transitions. [2021-06-12 21:36:47,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 21:36:47,630 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 21:36:47,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:47,632 INFO L225 Difference]: With dead ends: 878 [2021-06-12 21:36:47,632 INFO L226 Difference]: Without dead ends: 842 [2021-06-12 21:36:47,632 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 1039.8ms TimeCoverageRelationStatistics Valid=515, Invalid=2241, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 21:36:47,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-06-12 21:36:47,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 455. [2021-06-12 21:36:47,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 2.251101321585903) internal successors, (1022), 454 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:47,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1022 transitions. [2021-06-12 21:36:47,640 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1022 transitions. Word has length 27 [2021-06-12 21:36:47,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:47,640 INFO L482 AbstractCegarLoop]: Abstraction has 455 states and 1022 transitions. [2021-06-12 21:36:47,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:47,640 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1022 transitions. [2021-06-12 21:36:47,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:36:47,641 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:47,641 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:47,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:47,841 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:47,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:47,841 INFO L82 PathProgramCache]: Analyzing trace with hash -735982520, now seen corresponding path program 45 times [2021-06-12 21:36:47,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:47,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369241384] [2021-06-12 21:36:47,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:47,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:48,020 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:36:48,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:48,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369241384] [2021-06-12 21:36:48,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369241384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:48,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729783163] [2021-06-12 21:36:48,021 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 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 21:36:48,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:36:48,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:48,042 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:36:48,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:48,421 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:48,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729783163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:48,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:48,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-12 21:36:48,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545548852] [2021-06-12 21:36:48,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 21:36:48,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:48,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 21:36:48,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:36:48,423 INFO L87 Difference]: Start difference. First operand 455 states and 1022 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 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 21:36:49,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:49,221 INFO L93 Difference]: Finished difference Result 619 states and 1331 transitions. [2021-06-12 21:36:49,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 21:36:49,222 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 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 21:36:49,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:49,223 INFO L225 Difference]: With dead ends: 619 [2021-06-12 21:36:49,223 INFO L226 Difference]: Without dead ends: 545 [2021-06-12 21:36:49,223 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 903.7ms TimeCoverageRelationStatistics Valid=336, Invalid=2420, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 21:36:49,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-06-12 21:36:49,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 500. [2021-06-12 21:36:49,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 2.1983967935871744) internal successors, (1097), 499 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:49,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1097 transitions. [2021-06-12 21:36:49,229 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1097 transitions. Word has length 29 [2021-06-12 21:36:49,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:49,229 INFO L482 AbstractCegarLoop]: Abstraction has 500 states and 1097 transitions. [2021-06-12 21:36:49,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 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 21:36:49,229 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1097 transitions. [2021-06-12 21:36:49,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:36:49,230 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:49,230 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:49,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-12 21:36:49,439 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:49,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:49,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1495767748, now seen corresponding path program 46 times [2021-06-12 21:36:49,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:49,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713456615] [2021-06-12 21:36:49,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:49,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:49,641 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:49,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:49,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713456615] [2021-06-12 21:36:49,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713456615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:49,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099406217] [2021-06-12 21:36:49,641 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 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 21:36:49,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:36:49,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:49,669 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:36:49,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:50,039 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:50,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099406217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:50,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:50,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-12 21:36:50,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141919365] [2021-06-12 21:36:50,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 21:36:50,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:50,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 21:36:50,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:36:50,040 INFO L87 Difference]: Start difference. First operand 500 states and 1097 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 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 21:36:50,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:50,990 INFO L93 Difference]: Finished difference Result 591 states and 1253 transitions. [2021-06-12 21:36:50,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 21:36:50,990 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 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 21:36:50,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:50,991 INFO L225 Difference]: With dead ends: 591 [2021-06-12 21:36:50,991 INFO L226 Difference]: Without dead ends: 567 [2021-06-12 21:36:50,992 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1080.9ms TimeCoverageRelationStatistics Valid=411, Invalid=2781, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 21:36:50,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-12 21:36:50,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 503. [2021-06-12 21:36:50,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.195219123505976) internal successors, (1102), 502 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:50,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1102 transitions. [2021-06-12 21:36:50,998 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1102 transitions. Word has length 29 [2021-06-12 21:36:50,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:50,998 INFO L482 AbstractCegarLoop]: Abstraction has 503 states and 1102 transitions. [2021-06-12 21:36:50,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 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 21:36:50,998 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1102 transitions. [2021-06-12 21:36:50,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:36:50,999 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:50,999 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:51,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-12 21:36:51,205 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:51,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:51,205 INFO L82 PathProgramCache]: Analyzing trace with hash -719905720, now seen corresponding path program 47 times [2021-06-12 21:36:51,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:51,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977097821] [2021-06-12 21:36:51,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:51,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:51,401 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:36:51,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:51,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977097821] [2021-06-12 21:36:51,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977097821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:51,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116869581] [2021-06-12 21:36:51,402 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:51,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 21:36:51,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:51,426 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:36:51,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:51,822 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:51,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116869581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:51,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:51,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-12 21:36:51,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902836269] [2021-06-12 21:36:51,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 21:36:51,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:51,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 21:36:51,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:36:51,823 INFO L87 Difference]: Start difference. First operand 503 states and 1102 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 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 21:36:53,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:53,178 INFO L93 Difference]: Finished difference Result 627 states and 1326 transitions. [2021-06-12 21:36:53,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 21:36:53,178 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 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 21:36:53,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:53,180 INFO L225 Difference]: With dead ends: 627 [2021-06-12 21:36:53,180 INFO L226 Difference]: Without dead ends: 601 [2021-06-12 21:36:53,181 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 1322.2ms TimeCoverageRelationStatistics Valid=555, Invalid=3351, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 21:36:53,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-06-12 21:36:53,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 485. [2021-06-12 21:36:53,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 2.2024793388429753) internal successors, (1066), 484 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:53,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1066 transitions. [2021-06-12 21:36:53,187 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1066 transitions. Word has length 29 [2021-06-12 21:36:53,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:53,187 INFO L482 AbstractCegarLoop]: Abstraction has 485 states and 1066 transitions. [2021-06-12 21:36:53,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 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 21:36:53,188 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1066 transitions. [2021-06-12 21:36:53,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:36:53,188 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:53,188 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:53,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-12 21:36:53,389 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:53,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:53,389 INFO L82 PathProgramCache]: Analyzing trace with hash -682384688, now seen corresponding path program 48 times [2021-06-12 21:36:53,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:53,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149200881] [2021-06-12 21:36:53,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:53,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:53,597 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 21:36:53,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:53,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149200881] [2021-06-12 21:36:53,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149200881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:53,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713843614] [2021-06-12 21:36:53,598 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 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 21:36:53,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:36:53,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:53,630 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:36:53,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:54,089 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:54,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713843614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:54,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:54,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-12 21:36:54,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399443230] [2021-06-12 21:36:54,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:36:54,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:54,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:36:54,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:36:54,090 INFO L87 Difference]: Start difference. First operand 485 states and 1066 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:54,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:54,939 INFO L93 Difference]: Finished difference Result 685 states and 1451 transitions. [2021-06-12 21:36:54,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 21:36:54,939 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:36:54,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:54,941 INFO L225 Difference]: With dead ends: 685 [2021-06-12 21:36:54,941 INFO L226 Difference]: Without dead ends: 631 [2021-06-12 21:36:54,942 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 1058.7ms TimeCoverageRelationStatistics Valid=377, Invalid=2593, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 21:36:54,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-06-12 21:36:54,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 525. [2021-06-12 21:36:54,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 2.1946564885496183) internal successors, (1150), 524 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:54,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1150 transitions. [2021-06-12 21:36:54,949 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1150 transitions. Word has length 29 [2021-06-12 21:36:54,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:54,949 INFO L482 AbstractCegarLoop]: Abstraction has 525 states and 1150 transitions. [2021-06-12 21:36:54,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:54,950 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1150 transitions. [2021-06-12 21:36:54,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:36:54,950 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:54,950 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:55,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:55,165 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:55,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:55,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1499797836, now seen corresponding path program 49 times [2021-06-12 21:36:55,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:55,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594551331] [2021-06-12 21:36:55,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:55,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:55,335 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:36:55,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:55,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594551331] [2021-06-12 21:36:55,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594551331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:55,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927776904] [2021-06-12 21:36:55,336 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:55,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:55,356 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:36:55,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:55,736 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:55,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927776904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:55,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:55,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-12 21:36:55,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709819994] [2021-06-12 21:36:55,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:36:55,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:55,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:36:55,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:36:55,737 INFO L87 Difference]: Start difference. First operand 525 states and 1150 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:56,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:56,882 INFO L93 Difference]: Finished difference Result 696 states and 1471 transitions. [2021-06-12 21:36:56,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 21:36:56,882 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:36:56,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:56,884 INFO L225 Difference]: With dead ends: 696 [2021-06-12 21:36:56,884 INFO L226 Difference]: Without dead ends: 672 [2021-06-12 21:36:56,884 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 1253.3ms TimeCoverageRelationStatistics Valid=522, Invalid=3510, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 21:36:56,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-12 21:36:56,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 528. [2021-06-12 21:36:56,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 2.1916508538899433) internal successors, (1155), 527 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:56,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1155 transitions. [2021-06-12 21:36:56,891 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1155 transitions. Word has length 29 [2021-06-12 21:36:56,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:56,891 INFO L482 AbstractCegarLoop]: Abstraction has 528 states and 1155 transitions. [2021-06-12 21:36:56,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:56,891 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1155 transitions. [2021-06-12 21:36:56,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:36:56,892 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:56,892 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:57,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:57,092 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:57,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:57,093 INFO L82 PathProgramCache]: Analyzing trace with hash -715875632, now seen corresponding path program 50 times [2021-06-12 21:36:57,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:57,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619383698] [2021-06-12 21:36:57,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:57,303 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 21:36:57,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:57,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619383698] [2021-06-12 21:36:57,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619383698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:57,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476954119] [2021-06-12 21:36:57,304 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 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 21:36:57,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:36:57,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:57,336 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:36:57,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:57,785 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:57,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476954119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:57,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:57,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-12 21:36:57,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685200083] [2021-06-12 21:36:57,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:36:57,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:57,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:36:57,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:36:57,786 INFO L87 Difference]: Start difference. First operand 528 states and 1155 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:59,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:59,265 INFO L93 Difference]: Finished difference Result 739 states and 1557 transitions. [2021-06-12 21:36:59,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 21:36:59,267 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:36:59,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:59,268 INFO L225 Difference]: With dead ends: 739 [2021-06-12 21:36:59,268 INFO L226 Difference]: Without dead ends: 713 [2021-06-12 21:36:59,269 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 1473.4ms TimeCoverageRelationStatistics Valid=657, Invalid=3633, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 21:36:59,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-06-12 21:36:59,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 511. [2021-06-12 21:36:59,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.1921568627450982) internal successors, (1118), 510 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:59,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1118 transitions. [2021-06-12 21:36:59,279 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1118 transitions. Word has length 29 [2021-06-12 21:36:59,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:59,279 INFO L482 AbstractCegarLoop]: Abstraction has 511 states and 1118 transitions. [2021-06-12 21:36:59,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:36:59,279 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1118 transitions. [2021-06-12 21:36:59,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:36:59,280 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:59,280 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:59,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:59,480 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:59,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:59,481 INFO L82 PathProgramCache]: Analyzing trace with hash -353926280, now seen corresponding path program 51 times [2021-06-12 21:36:59,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:59,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701823083] [2021-06-12 21:36:59,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:59,780 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:59,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:59,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701823083] [2021-06-12 21:36:59,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701823083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:59,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128533266] [2021-06-12 21:36:59,781 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 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 21:36:59,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:36:59,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:59,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:36:59,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:37:00,317 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:00,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128533266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:00,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:37:00,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-06-12 21:37:00,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866957921] [2021-06-12 21:37:00,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 21:37:00,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:37:00,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 21:37:00,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:37:00,319 INFO L87 Difference]: Start difference. First operand 511 states and 1118 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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 21:37:01,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:37:01,282 INFO L93 Difference]: Finished difference Result 724 states and 1531 transitions. [2021-06-12 21:37:01,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 21:37:01,283 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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 21:37:01,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:37:01,284 INFO L225 Difference]: With dead ends: 724 [2021-06-12 21:37:01,284 INFO L226 Difference]: Without dead ends: 647 [2021-06-12 21:37:01,284 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1214.0ms TimeCoverageRelationStatistics Valid=324, Invalid=2328, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 21:37:01,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-06-12 21:37:01,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 527. [2021-06-12 21:37:01,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 2.1863117870722433) internal successors, (1150), 526 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:01,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1150 transitions. [2021-06-12 21:37:01,290 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1150 transitions. Word has length 29 [2021-06-12 21:37:01,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:37:01,290 INFO L482 AbstractCegarLoop]: Abstraction has 527 states and 1150 transitions. [2021-06-12 21:37:01,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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 21:37:01,290 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1150 transitions. [2021-06-12 21:37:01,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:37:01,290 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:37:01,290 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:37:01,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:37:01,491 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:37:01,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:37:01,491 INFO L82 PathProgramCache]: Analyzing trace with hash 2048232520, now seen corresponding path program 52 times [2021-06-12 21:37:01,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:37:01,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388725736] [2021-06-12 21:37:01,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:37:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:37:01,693 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:37:01,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:37:01,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388725736] [2021-06-12 21:37:01,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388725736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:01,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40294681] [2021-06-12 21:37:01,694 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 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 21:37:01,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:37:01,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:37:01,722 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:37:01,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:37:02,106 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:02,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40294681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:02,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:37:02,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-12 21:37:02,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150120163] [2021-06-12 21:37:02,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:37:02,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:37:02,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:37:02,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:37:02,107 INFO L87 Difference]: Start difference. First operand 527 states and 1150 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 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 21:37:02,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:37:02,985 INFO L93 Difference]: Finished difference Result 754 states and 1604 transitions. [2021-06-12 21:37:02,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 21:37:02,985 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 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 21:37:02,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:37:02,986 INFO L225 Difference]: With dead ends: 754 [2021-06-12 21:37:02,986 INFO L226 Difference]: Without dead ends: 702 [2021-06-12 21:37:02,986 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 1046.1ms TimeCoverageRelationStatistics Valid=419, Invalid=2887, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 21:37:02,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-06-12 21:37:02,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 611. [2021-06-12 21:37:02,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 610 states have (on average 2.181967213114754) internal successors, (1331), 610 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:02,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 1331 transitions. [2021-06-12 21:37:02,994 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 1331 transitions. Word has length 29 [2021-06-12 21:37:02,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:37:02,994 INFO L482 AbstractCegarLoop]: Abstraction has 611 states and 1331 transitions. [2021-06-12 21:37:02,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 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 21:37:02,994 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 1331 transitions. [2021-06-12 21:37:02,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:37:02,995 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:37:02,995 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:37:03,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-06-12 21:37:03,209 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:37:03,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:37:03,209 INFO L82 PathProgramCache]: Analyzing trace with hash -14984508, now seen corresponding path program 53 times [2021-06-12 21:37:03,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:37:03,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070044318] [2021-06-12 21:37:03,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:37:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:37:03,372 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:03,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:37:03,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070044318] [2021-06-12 21:37:03,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070044318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:03,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056587028] [2021-06-12 21:37:03,372 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 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 21:37:03,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 21:37:03,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:37:03,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:37:03,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:37:04,113 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:04,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056587028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:04,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:37:04,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-12 21:37:04,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343399858] [2021-06-12 21:37:04,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 21:37:04,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:37:04,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 21:37:04,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:37:04,114 INFO L87 Difference]: Start difference. First operand 611 states and 1331 transitions. Second operand has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 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 21:37:05,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:37:05,917 INFO L93 Difference]: Finished difference Result 840 states and 1779 transitions. [2021-06-12 21:37:05,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 21:37:05,917 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:37:05,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:37:05,918 INFO L225 Difference]: With dead ends: 840 [2021-06-12 21:37:05,918 INFO L226 Difference]: Without dead ends: 818 [2021-06-12 21:37:05,919 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 2055.1ms TimeCoverageRelationStatistics Valid=598, Invalid=4232, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 21:37:05,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-06-12 21:37:05,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 654. [2021-06-12 21:37:05,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 2.1852986217457886) internal successors, (1427), 653 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:05,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1427 transitions. [2021-06-12 21:37:05,925 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1427 transitions. Word has length 29 [2021-06-12 21:37:05,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:37:05,925 INFO L482 AbstractCegarLoop]: Abstraction has 654 states and 1427 transitions. [2021-06-12 21:37:05,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 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 21:37:05,926 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1427 transitions. [2021-06-12 21:37:05,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:37:05,926 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:37:05,926 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:37:06,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:37:06,127 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:37:06,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:37:06,127 INFO L82 PathProgramCache]: Analyzing trace with hash 2064309320, now seen corresponding path program 54 times [2021-06-12 21:37:06,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:37:06,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458296306] [2021-06-12 21:37:06,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:37:06,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:37:06,383 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:37:06,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:37:06,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458296306] [2021-06-12 21:37:06,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458296306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:06,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940947833] [2021-06-12 21:37:06,384 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 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 21:37:06,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:37:06,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:37:06,405 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 21:37:06,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:37:06,798 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:06,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940947833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:06,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:37:06,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-12 21:37:06,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542905266] [2021-06-12 21:37:06,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:37:06,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:37:06,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:37:06,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:37:06,800 INFO L87 Difference]: Start difference. First operand 654 states and 1427 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 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 21:37:08,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:37:08,543 INFO L93 Difference]: Finished difference Result 877 states and 1853 transitions. [2021-06-12 21:37:08,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 21:37:08,543 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 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 21:37:08,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:37:08,544 INFO L225 Difference]: With dead ends: 877 [2021-06-12 21:37:08,544 INFO L226 Difference]: Without dead ends: 847 [2021-06-12 21:37:08,545 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1762 ImplicationChecksByTransitivity, 1743.7ms TimeCoverageRelationStatistics Valid=841, Invalid=4859, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 21:37:08,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-06-12 21:37:08,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 593. [2021-06-12 21:37:08,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 2.1655405405405403) internal successors, (1282), 592 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:08,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1282 transitions. [2021-06-12 21:37:08,554 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1282 transitions. Word has length 29 [2021-06-12 21:37:08,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:37:08,554 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1282 transitions. [2021-06-12 21:37:08,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 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 21:37:08,554 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1282 transitions. [2021-06-12 21:37:08,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:37:08,555 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:37:08,555 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:37:08,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2021-06-12 21:37:08,765 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:37:08,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:37:08,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1014858316, now seen corresponding path program 55 times [2021-06-12 21:37:08,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:37:08,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066393316] [2021-06-12 21:37:08,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:37:08,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:37:08,999 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:08,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:37:08,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066393316] [2021-06-12 21:37:08,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066393316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:08,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798559574] [2021-06-12 21:37:08,999 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 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 21:37:09,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:37:09,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:37:09,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:37:09,610 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:09,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798559574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:09,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:37:09,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-12 21:37:09,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980483056] [2021-06-12 21:37:09,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:37:09,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:37:09,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:37:09,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:37:09,611 INFO L87 Difference]: Start difference. First operand 593 states and 1282 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 21:37:10,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:37:10,399 INFO L93 Difference]: Finished difference Result 753 states and 1591 transitions. [2021-06-12 21:37:10,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 21:37:10,400 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 21:37:10,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:37:10,401 INFO L225 Difference]: With dead ends: 753 [2021-06-12 21:37:10,401 INFO L226 Difference]: Without dead ends: 731 [2021-06-12 21:37:10,401 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1152.2ms TimeCoverageRelationStatistics Valid=284, Invalid=1878, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 21:37:10,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-06-12 21:37:10,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 618. [2021-06-12 21:37:10,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 2.1620745542949757) internal successors, (1334), 617 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:10,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 1334 transitions. [2021-06-12 21:37:10,410 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 1334 transitions. Word has length 29 [2021-06-12 21:37:10,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:37:10,410 INFO L482 AbstractCegarLoop]: Abstraction has 618 states and 1334 transitions. [2021-06-12 21:37:10,410 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 21:37:10,410 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 1334 transitions. [2021-06-12 21:37:10,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:37:10,411 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:37:10,411 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:37:10,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-12 21:37:10,625 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:37:10,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:37:10,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1064435512, now seen corresponding path program 56 times [2021-06-12 21:37:10,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:37:10,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946001472] [2021-06-12 21:37:10,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:37:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:37:10,857 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:10,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:37:10,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946001472] [2021-06-12 21:37:10,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946001472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:10,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857994541] [2021-06-12 21:37:10,858 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 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 21:37:10,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:37:10,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:37:10,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:37:10,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:37:11,407 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:11,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857994541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:11,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:37:11,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-12 21:37:11,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789550385] [2021-06-12 21:37:11,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:37:11,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:37:11,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:37:11,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:37:11,408 INFO L87 Difference]: Start difference. First operand 618 states and 1334 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 21:37:12,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:37:12,258 INFO L93 Difference]: Finished difference Result 872 states and 1845 transitions. [2021-06-12 21:37:12,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 21:37:12,258 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 21:37:12,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:37:12,259 INFO L225 Difference]: With dead ends: 872 [2021-06-12 21:37:12,259 INFO L226 Difference]: Without dead ends: 839 [2021-06-12 21:37:12,259 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1114.8ms TimeCoverageRelationStatistics Valid=340, Invalid=2110, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 21:37:12,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-06-12 21:37:12,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 617. [2021-06-12 21:37:12,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 616 states have (on average 2.1623376623376624) internal successors, (1332), 616 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:12,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 1332 transitions. [2021-06-12 21:37:12,270 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 1332 transitions. Word has length 29 [2021-06-12 21:37:12,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:37:12,270 INFO L482 AbstractCegarLoop]: Abstraction has 617 states and 1332 transitions. [2021-06-12 21:37:12,270 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 21:37:12,270 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 1332 transitions. [2021-06-12 21:37:12,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:37:12,271 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:37:12,271 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:37:12,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:37:12,493 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:37:12,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:37:12,494 INFO L82 PathProgramCache]: Analyzing trace with hash -11275644, now seen corresponding path program 57 times [2021-06-12 21:37:12,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:37:12,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757719701] [2021-06-12 21:37:12,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:37:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:37:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:12,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:37:12,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757719701] [2021-06-12 21:37:12,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757719701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:12,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295911051] [2021-06-12 21:37:12,722 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 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 21:37:12,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 21:37:12,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:37:12,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:37:12,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:37:13,297 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:13,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295911051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:13,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:37:13,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-12 21:37:13,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470132209] [2021-06-12 21:37:13,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:37:13,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:37:13,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:37:13,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:37:13,298 INFO L87 Difference]: Start difference. First operand 617 states and 1332 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 21:37:14,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:37:14,163 INFO L93 Difference]: Finished difference Result 1003 states and 2135 transitions. [2021-06-12 21:37:14,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 21:37:14,163 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 21:37:14,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:37:14,164 INFO L225 Difference]: With dead ends: 1003 [2021-06-12 21:37:14,164 INFO L226 Difference]: Without dead ends: 970 [2021-06-12 21:37:14,165 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1144.9ms TimeCoverageRelationStatistics Valid=330, Invalid=2120, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 21:37:14,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2021-06-12 21:37:14,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 603. [2021-06-12 21:37:14,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 2.1627906976744184) internal successors, (1302), 602 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:14,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1302 transitions. [2021-06-12 21:37:14,172 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1302 transitions. Word has length 29 [2021-06-12 21:37:14,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:37:14,172 INFO L482 AbstractCegarLoop]: Abstraction has 603 states and 1302 transitions. [2021-06-12 21:37:14,172 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 21:37:14,172 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1302 transitions. [2021-06-12 21:37:14,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:37:14,173 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:37:14,173 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:37:14,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:37:14,374 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:37:14,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:37:14,374 INFO L82 PathProgramCache]: Analyzing trace with hash -992806576, now seen corresponding path program 58 times [2021-06-12 21:37:14,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:37:14,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591575217] [2021-06-12 21:37:14,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:37:14,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:37:14,532 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 21:37:14,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:37:14,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591575217] [2021-06-12 21:37:14,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591575217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:14,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030343347] [2021-06-12 21:37:14,533 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 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 21:37:14,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:37:14,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:37:14,583 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:37:14,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:37:15,024 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:15,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030343347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:15,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:37:15,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-12 21:37:15,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150138532] [2021-06-12 21:37:15,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:37:15,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:37:15,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:37:15,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:37:15,026 INFO L87 Difference]: Start difference. First operand 603 states and 1302 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:15,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:37:15,783 INFO L93 Difference]: Finished difference Result 675 states and 1425 transitions. [2021-06-12 21:37:15,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 21:37:15,784 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:37:15,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:37:15,785 INFO L225 Difference]: With dead ends: 675 [2021-06-12 21:37:15,785 INFO L226 Difference]: Without dead ends: 607 [2021-06-12 21:37:15,785 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 991.9ms TimeCoverageRelationStatistics Valid=405, Invalid=2675, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 21:37:15,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-12 21:37:15,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 576. [2021-06-12 21:37:15,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 2.017391304347826) internal successors, (1160), 575 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:15,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1160 transitions. [2021-06-12 21:37:15,791 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1160 transitions. Word has length 29 [2021-06-12 21:37:15,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:37:15,791 INFO L482 AbstractCegarLoop]: Abstraction has 576 states and 1160 transitions. [2021-06-12 21:37:15,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:15,791 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1160 transitions. [2021-06-12 21:37:15,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:37:15,792 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:37:15,792 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:37:15,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:37:15,992 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:37:15,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:37:15,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1189375948, now seen corresponding path program 59 times [2021-06-12 21:37:15,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:37:15,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232091519] [2021-06-12 21:37:15,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:37:15,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:37:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:37:16,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:37:16,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232091519] [2021-06-12 21:37:16,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232091519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:16,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510484570] [2021-06-12 21:37:16,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:37:16,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 21:37:16,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:37:16,223 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:37:16,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:37:16,754 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:16,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510484570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:16,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:37:16,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-12 21:37:16,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911007460] [2021-06-12 21:37:16,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:37:16,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:37:16,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:37:16,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:37:16,755 INFO L87 Difference]: Start difference. First operand 576 states and 1160 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:17,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:37:17,939 INFO L93 Difference]: Finished difference Result 703 states and 1407 transitions. [2021-06-12 21:37:17,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 21:37:17,940 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:37:17,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:37:17,941 INFO L225 Difference]: With dead ends: 703 [2021-06-12 21:37:17,941 INFO L226 Difference]: Without dead ends: 679 [2021-06-12 21:37:17,941 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1232 ImplicationChecksByTransitivity, 1478.3ms TimeCoverageRelationStatistics Valid=540, Invalid=3750, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 21:37:17,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-06-12 21:37:17,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 583. [2021-06-12 21:37:17,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 2.0051546391752577) internal successors, (1167), 582 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:17,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1167 transitions. [2021-06-12 21:37:17,948 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1167 transitions. Word has length 29 [2021-06-12 21:37:17,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:37:17,948 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1167 transitions. [2021-06-12 21:37:17,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:17,948 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1167 transitions. [2021-06-12 21:37:17,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:37:17,949 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:37:17,949 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:37:18,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-06-12 21:37:18,157 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:37:18,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:37:18,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1026297520, now seen corresponding path program 60 times [2021-06-12 21:37:18,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:37:18,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383925196] [2021-06-12 21:37:18,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:37:18,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:37:18,323 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 21:37:18,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:37:18,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383925196] [2021-06-12 21:37:18,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383925196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:18,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868305725] [2021-06-12 21:37:18,323 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 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 21:37:18,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:37:18,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:37:18,345 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 21:37:18,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:37:18,741 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:18,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868305725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:18,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:37:18,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-12 21:37:18,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446417962] [2021-06-12 21:37:18,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:37:18,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:37:18,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:37:18,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:37:18,742 INFO L87 Difference]: Start difference. First operand 583 states and 1167 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:20,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:37:20,263 INFO L93 Difference]: Finished difference Result 756 states and 1505 transitions. [2021-06-12 21:37:20,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 21:37:20,263 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 21:37:20,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:37:20,264 INFO L225 Difference]: With dead ends: 756 [2021-06-12 21:37:20,264 INFO L226 Difference]: Without dead ends: 730 [2021-06-12 21:37:20,264 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 1499.3ms TimeCoverageRelationStatistics Valid=617, Invalid=3939, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 21:37:20,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-06-12 21:37:20,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 457. [2021-06-12 21:37:20,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.9956140350877194) internal successors, (910), 456 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:20,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 910 transitions. [2021-06-12 21:37:20,271 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 910 transitions. Word has length 29 [2021-06-12 21:37:20,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:37:20,271 INFO L482 AbstractCegarLoop]: Abstraction has 457 states and 910 transitions. [2021-06-12 21:37:20,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:20,271 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 910 transitions. [2021-06-12 21:37:20,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:37:20,272 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:37:20,272 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:37:20,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-12 21:37:20,489 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:37:20,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:37:20,489 INFO L82 PathProgramCache]: Analyzing trace with hash -664348168, now seen corresponding path program 61 times [2021-06-12 21:37:20,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:37:20,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787311329] [2021-06-12 21:37:20,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:37:20,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:37:20,721 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:37:20,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:37:20,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787311329] [2021-06-12 21:37:20,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787311329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:20,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520294607] [2021-06-12 21:37:20,721 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 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 21:37:20,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:37:20,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:37:20,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:37:21,171 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:21,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520294607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:21,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:37:21,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-12 21:37:21,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782025210] [2021-06-12 21:37:21,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:37:21,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:37:21,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:37:21,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:37:21,177 INFO L87 Difference]: Start difference. First operand 457 states and 910 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 21:37:21,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:37:21,940 INFO L93 Difference]: Finished difference Result 708 states and 1404 transitions. [2021-06-12 21:37:21,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 21:37:21,941 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 21:37:21,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:37:21,942 INFO L225 Difference]: With dead ends: 708 [2021-06-12 21:37:21,942 INFO L226 Difference]: Without dead ends: 683 [2021-06-12 21:37:21,942 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1007.9ms TimeCoverageRelationStatistics Valid=277, Invalid=1979, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 21:37:21,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-06-12 21:37:21,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 517. [2021-06-12 21:37:21,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.996124031007752) internal successors, (1030), 516 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 21:37:21,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1030 transitions. [2021-06-12 21:37:21,947 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1030 transitions. Word has length 29 [2021-06-12 21:37:21,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:37:21,947 INFO L482 AbstractCegarLoop]: Abstraction has 517 states and 1030 transitions. [2021-06-12 21:37:21,947 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 21:37:21,948 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1030 transitions. [2021-06-12 21:37:21,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:37:21,948 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:37:21,948 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:37:22,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-06-12 21:37:22,169 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:37:22,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:37:22,169 INFO L82 PathProgramCache]: Analyzing trace with hash 211415604, now seen corresponding path program 62 times [2021-06-12 21:37:22,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:37:22,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148260631] [2021-06-12 21:37:22,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:37:22,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:37:22,421 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:22,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:37:22,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148260631] [2021-06-12 21:37:22,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148260631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:22,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546116955] [2021-06-12 21:37:22,422 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 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 21:37:22,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:37:22,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:37:22,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:37:22,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:37:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:22,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546116955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:22,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:37:22,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-12 21:37:22,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046110497] [2021-06-12 21:37:22,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:37:22,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:37:23,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:37:23,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:37:23,001 INFO L87 Difference]: Start difference. First operand 517 states and 1030 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 21:37:24,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:37:24,018 INFO L93 Difference]: Finished difference Result 722 states and 1434 transitions. [2021-06-12 21:37:24,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 21:37:24,018 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 21:37:24,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:37:24,019 INFO L225 Difference]: With dead ends: 722 [2021-06-12 21:37:24,019 INFO L226 Difference]: Without dead ends: 693 [2021-06-12 21:37:24,019 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 1364.2ms TimeCoverageRelationStatistics Valid=356, Invalid=2614, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 21:37:24,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2021-06-12 21:37:24,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 303. [2021-06-12 21:37:24,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.9801324503311257) internal successors, (598), 302 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 21:37:24,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 598 transitions. [2021-06-12 21:37:24,024 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 598 transitions. Word has length 29 [2021-06-12 21:37:24,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:37:24,024 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 598 transitions. [2021-06-12 21:37:24,024 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 21:37:24,024 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 598 transitions. [2021-06-12 21:37:24,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 21:37:24,024 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:37:24,025 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:37:24,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:37:24,225 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:37:24,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:37:24,225 INFO L82 PathProgramCache]: Analyzing trace with hash -758525832, now seen corresponding path program 63 times [2021-06-12 21:37:24,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:37:24,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628878936] [2021-06-12 21:37:24,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:37:24,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:37:24,443 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:24,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:37:24,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628878936] [2021-06-12 21:37:24,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628878936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:24,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688015780] [2021-06-12 21:37:24,443 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 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 21:37:24,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:37:24,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:37:24,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:37:24,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:37:24,919 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:37:24,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688015780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:37:24,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:37:24,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-06-12 21:37:24,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192226484] [2021-06-12 21:37:24,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 21:37:24,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:37:24,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 21:37:24,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:37:24,920 INFO L87 Difference]: Start difference. First operand 303 states and 598 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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 21:37:25,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:37:25,916 INFO L93 Difference]: Finished difference Result 368 states and 721 transitions. [2021-06-12 21:37:25,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 21:37:25,917 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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 21:37:25,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:37:25,917 INFO L225 Difference]: With dead ends: 368 [2021-06-12 21:37:25,917 INFO L226 Difference]: Without dead ends: 0 [2021-06-12 21:37:25,917 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1227.3ms TimeCoverageRelationStatistics Valid=363, Invalid=2717, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 21:37:25,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-12 21:37:25,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-12 21:37:25,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:37:25,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-12 21:37:25,918 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2021-06-12 21:37:25,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:37:25,918 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-12 21:37:25,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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 21:37:25,918 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-12 21:37:25,918 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-12 21:37:26,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-06-12 21:37:26,123 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 21:37:26,125 INFO L202 PluginConnector]: Adding new model threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 09:37:26 BasicIcfg [2021-06-12 21:37:26,125 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 21:37:26,126 INFO L168 Benchmark]: Toolchain (without parser) took 117378.98 ms. Allocated memory was 205.5 MB in the beginning and 357.6 MB in the end (delta: 152.0 MB). Free memory was 185.1 MB in the beginning and 237.4 MB in the end (delta: -52.2 MB). Peak memory consumption was 100.5 MB. Max. memory is 8.0 GB. [2021-06-12 21:37:26,126 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 205.5 MB. Free memory is still 186.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 21:37:26,126 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.01 ms. Allocated memory is still 205.5 MB. Free memory was 185.1 MB in the beginning and 183.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 21:37:26,126 INFO L168 Benchmark]: Boogie Preprocessor took 11.98 ms. Allocated memory is still 205.5 MB. Free memory was 183.6 MB in the beginning and 182.7 MB in the end (delta: 920.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-12 21:37:26,126 INFO L168 Benchmark]: RCFGBuilder took 220.18 ms. Allocated memory is still 205.5 MB. Free memory was 182.7 MB in the beginning and 170.7 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-06-12 21:37:26,126 INFO L168 Benchmark]: TraceAbstraction took 117122.80 ms. Allocated memory was 205.5 MB in the beginning and 357.6 MB in the end (delta: 152.0 MB). Free memory was 170.1 MB in the beginning and 237.4 MB in the end (delta: -67.3 MB). Peak memory consumption was 85.8 MB. Max. memory is 8.0 GB. [2021-06-12 21:37:26,126 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 0.11 ms. Allocated memory is still 205.5 MB. Free memory is still 186.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 20.01 ms. Allocated memory is still 205.5 MB. Free memory was 185.1 MB in the beginning and 183.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 11.98 ms. Allocated memory is still 205.5 MB. Free memory was 183.6 MB in the beginning and 182.7 MB in the end (delta: 920.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 220.18 ms. Allocated memory is still 205.5 MB. Free memory was 182.7 MB in the beginning and 170.7 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 117122.80 ms. Allocated memory was 205.5 MB in the beginning and 357.6 MB in the end (delta: 152.0 MB). Free memory was 170.1 MB in the beginning and 237.4 MB in the end (delta: -67.3 MB). Peak memory consumption was 85.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 55]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 34 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 117055.3ms, OverallIterations: 65, TraceHistogramMax: 4, EmptinessCheckTime: 50.4ms, AutomataDifference: 63087.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1312 SDtfs, 8575 SDslu, 14141 SDs, 0 SdLazy, 47169 SolverSat, 4093 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18666.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4260 GetRequests, 814 SyntacticMatches, 135 SemanticMatches, 3311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57379 ImplicationChecksByTransitivity, 69922.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=654occurred in iteration=55, InterpolantAutomatonStates: 2580, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 384.2ms AutomataMinimizationTime, 65 MinimizatonAttempts, 10402 StatesRemovedByMinimization, 63 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 193.9ms SsaConstructionTime, 545.2ms SatisfiabilityAnalysisTime, 38190.4ms InterpolantComputationTime, 3377 NumberOfCodeBlocks, 3377 NumberOfCodeBlocksAsserted, 222 NumberOfCheckSat, 3250 ConstructedInterpolants, 0 QuantifiedInterpolants, 55612 SizeOfPredicates, 310 NumberOfNonLiveVariables, 2754 ConjunctsInSsa, 1275 ConjunctsInUnsatCore, 127 InterpolantComputations, 3 PerfectInterpolantSequences, 67/1839 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...